/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/chl/chromosome-opt-symm.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.2-wip.dk.abstract-por-f0ea240 [2022-02-11 00:21:56,004 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-02-11 00:21:56,006 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-02-11 00:21:56,071 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-02-11 00:21:56,115 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf [2022-02-11 00:21:56,138 INFO L113 SettingsManager]: Loading preferences was successful [2022-02-11 00:21:56,138 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-02-11 00:21:56,138 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-02-11 00:21:56,138 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-02-11 00:21:56,139 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-02-11 00:21:56,139 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-02-11 00:21:56,139 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-02-11 00:21:56,139 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-02-11 00:21:56,139 INFO L138 SettingsManager]: * Use SBE=true [2022-02-11 00:21:56,140 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-02-11 00:21:56,140 INFO L138 SettingsManager]: * sizeof long=4 [2022-02-11 00:21:56,140 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-02-11 00:21:56,140 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-02-11 00:21:56,140 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-02-11 00:21:56,140 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-02-11 00:21:56,141 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-02-11 00:21:56,141 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-02-11 00:21:56,141 INFO L138 SettingsManager]: * sizeof long double=12 [2022-02-11 00:21:56,141 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-02-11 00:21:56,141 INFO L138 SettingsManager]: * Use constant arrays=true [2022-02-11 00:21:56,141 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-02-11 00:21:56,141 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-02-11 00:21:56,141 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-02-11 00:21:56,141 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-02-11 00:21:56,142 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-02-11 00:21:56,142 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-11 00:21:56,142 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-02-11 00:21:56,142 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-02-11 00:21:56,142 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-02-11 00:21:56,143 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-02-11 00:21:56,143 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-02-11 00:21:56,143 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-02-11 00:21:56,143 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-02-11 00:21:56,143 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-02-11 00:21:56,298 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-02-11 00:21:56,322 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-02-11 00:21:56,323 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-02-11 00:21:56,324 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2022-02-11 00:21:56,328 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2022-02-11 00:21:56,328 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/chl/chromosome-opt-symm.wvr.bpl [2022-02-11 00:21:56,329 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/chl/chromosome-opt-symm.wvr.bpl' [2022-02-11 00:21:56,357 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-02-11 00:21:56,358 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-02-11 00:21:56,358 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-02-11 00:21:56,358 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-02-11 00:21:56,358 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-02-11 00:21:56,366 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "chromosome-opt-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.02 12:21:56" (1/1) ... [2022-02-11 00:21:56,371 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "chromosome-opt-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.02 12:21:56" (1/1) ... [2022-02-11 00:21:56,376 INFO L137 Inliner]: procedures = 3, calls = 2, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2022-02-11 00:21:56,377 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-02-11 00:21:56,391 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-02-11 00:21:56,391 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-02-11 00:21:56,391 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-02-11 00:21:56,397 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "chromosome-opt-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.02 12:21:56" (1/1) ... [2022-02-11 00:21:56,397 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "chromosome-opt-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.02 12:21:56" (1/1) ... [2022-02-11 00:21:56,406 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "chromosome-opt-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.02 12:21:56" (1/1) ... [2022-02-11 00:21:56,406 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "chromosome-opt-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.02 12:21:56" (1/1) ... [2022-02-11 00:21:56,408 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "chromosome-opt-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.02 12:21:56" (1/1) ... [2022-02-11 00:21:56,410 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "chromosome-opt-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.02 12:21:56" (1/1) ... [2022-02-11 00:21:56,410 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "chromosome-opt-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.02 12:21:56" (1/1) ... [2022-02-11 00:21:56,411 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-02-11 00:21:56,412 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-02-11 00:21:56,412 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-02-11 00:21:56,412 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-02-11 00:21:56,414 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "chromosome-opt-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.02 12:21:56" (1/1) ... [2022-02-11 00:21:56,419 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-11 00:21:56,423 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:21:56,434 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) [2022-02-11 00:21:56,437 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 [2022-02-11 00:21:56,467 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2022-02-11 00:21:56,467 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-02-11 00:21:56,467 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-02-11 00:21:56,468 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2022-02-11 00:21:56,468 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-02-11 00:21:56,468 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-02-11 00:21:56,468 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2022-02-11 00:21:56,468 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-02-11 00:21:56,468 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-02-11 00:21:56,468 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-02-11 00:21:56,503 INFO L234 CfgBuilder]: Building ICFG [2022-02-11 00:21:56,504 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-02-11 00:21:56,600 INFO L275 CfgBuilder]: Performing block encoding [2022-02-11 00:21:56,632 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-02-11 00:21:56,632 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-02-11 00:21:56,633 INFO L202 PluginConnector]: Adding new model chromosome-opt-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.02 12:21:56 BoogieIcfgContainer [2022-02-11 00:21:56,633 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-02-11 00:21:56,635 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-02-11 00:21:56,635 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-02-11 00:21:56,640 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-02-11 00:21:56,641 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "chromosome-opt-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.02 12:21:56" (1/2) ... [2022-02-11 00:21:56,641 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@61dccc64 and model type chromosome-opt-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.02 12:21:56, skipping insertion in model container [2022-02-11 00:21:56,641 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "chromosome-opt-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.02 12:21:56" (2/2) ... [2022-02-11 00:21:56,643 INFO L112 eAbstractionObserver]: Analyzing ICFG chromosome-opt-symm.wvr.bpl [2022-02-11 00:21:56,647 WARN L154 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-02-11 00:21:56,648 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-02-11 00:21:56,648 INFO L168 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-02-11 00:21:56,648 INFO L538 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-02-11 00:21:56,696 INFO L148 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-02-11 00:21:56,724 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-02-11 00:21:56,736 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 [2022-02-11 00:21:56,736 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-02-11 00:21:56,742 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 23 places, 18 transitions, 52 flow [2022-02-11 00:21:56,753 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 28 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 27 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) [2022-02-11 00:21:56,754 INFO L276 IsEmpty]: Start isEmpty. Operand has 28 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 27 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) [2022-02-11 00:21:56,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-02-11 00:21:56,758 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:21:56,759 INFO L515 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:21:56,759 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:21:56,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:21:56,762 INFO L85 PathProgramCache]: Analyzing trace with hash 1091897923, now seen corresponding path program 1 times [2022-02-11 00:21:56,768 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:21:56,769 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1674524246] [2022-02-11 00:21:56,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:21:56,769 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:21:56,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:21:56,949 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:21:56,949 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:21:56,950 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1674524246] [2022-02-11 00:21:56,950 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1674524246] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-11 00:21:56,950 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-11 00:21:56,950 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-11 00:21:56,952 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1774167739] [2022-02-11 00:21:56,952 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-11 00:21:56,972 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-11 00:21:56,972 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:21:56,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-11 00:21:56,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-11 00:21:57,001 INFO L87 Difference]: Start difference. First operand has 28 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 27 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) Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:21:57,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:21:57,056 INFO L93 Difference]: Finished difference Result 46 states and 83 transitions. [2022-02-11 00:21:57,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-11 00:21:57,058 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-02-11 00:21:57,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:21:57,063 INFO L225 Difference]: With dead ends: 46 [2022-02-11 00:21:57,064 INFO L226 Difference]: Without dead ends: 44 [2022-02-11 00:21:57,065 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-02-11 00:21:57,084 INFO L934 BasicCegarLoop]: 6 mSDtfsCounter, 17 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-11 00:21:57,085 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 15 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-11 00:21:57,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-02-11 00:21:57,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 29. [2022-02-11 00:21:57,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.9285714285714286) internal successors, (54), 28 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:21:57,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 54 transitions. [2022-02-11 00:21:57,127 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 54 transitions. Word has length 12 [2022-02-11 00:21:57,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:21:57,127 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 54 transitions. [2022-02-11 00:21:57,127 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:21:57,127 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 54 transitions. [2022-02-11 00:21:57,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-02-11 00:21:57,129 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:21:57,129 INFO L515 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:21:57,129 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-02-11 00:21:57,129 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:21:57,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:21:57,130 INFO L85 PathProgramCache]: Analyzing trace with hash -28826553, now seen corresponding path program 2 times [2022-02-11 00:21:57,130 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:21:57,130 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [988113353] [2022-02-11 00:21:57,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:21:57,131 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:21:57,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:21:57,168 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:21:57,168 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:21:57,168 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [988113353] [2022-02-11 00:21:57,168 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [988113353] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-11 00:21:57,168 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-11 00:21:57,168 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-11 00:21:57,168 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1662513471] [2022-02-11 00:21:57,169 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-11 00:21:57,169 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-11 00:21:57,170 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:21:57,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-11 00:21:57,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-11 00:21:57,170 INFO L87 Difference]: Start difference. First operand 29 states and 54 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:21:57,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:21:57,217 INFO L93 Difference]: Finished difference Result 32 states and 60 transitions. [2022-02-11 00:21:57,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-11 00:21:57,217 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-02-11 00:21:57,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:21:57,218 INFO L225 Difference]: With dead ends: 32 [2022-02-11 00:21:57,218 INFO L226 Difference]: Without dead ends: 32 [2022-02-11 00:21:57,218 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-02-11 00:21:57,219 INFO L934 BasicCegarLoop]: 6 mSDtfsCounter, 12 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-11 00:21:57,220 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 12 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-11 00:21:57,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-02-11 00:21:57,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2022-02-11 00:21:57,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 31 states have (on average 1.935483870967742) internal successors, (60), 31 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) [2022-02-11 00:21:57,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 60 transitions. [2022-02-11 00:21:57,223 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 60 transitions. Word has length 12 [2022-02-11 00:21:57,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:21:57,224 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 60 transitions. [2022-02-11 00:21:57,224 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:21:57,224 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 60 transitions. [2022-02-11 00:21:57,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-02-11 00:21:57,225 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:21:57,226 INFO L515 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:21:57,226 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-02-11 00:21:57,226 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:21:57,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:21:57,227 INFO L85 PathProgramCache]: Analyzing trace with hash 2117344207, now seen corresponding path program 3 times [2022-02-11 00:21:57,228 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:21:57,228 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [721267698] [2022-02-11 00:21:57,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:21:57,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:21:57,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:21:57,271 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:21:57,271 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:21:57,271 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [721267698] [2022-02-11 00:21:57,272 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [721267698] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-11 00:21:57,272 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-11 00:21:57,272 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-11 00:21:57,272 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2082130225] [2022-02-11 00:21:57,272 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-11 00:21:57,272 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-11 00:21:57,272 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:21:57,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-11 00:21:57,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-02-11 00:21:57,273 INFO L87 Difference]: Start difference. First operand 32 states and 60 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:21:57,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:21:57,304 INFO L93 Difference]: Finished difference Result 54 states and 98 transitions. [2022-02-11 00:21:57,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-11 00:21:57,305 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-02-11 00:21:57,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:21:57,305 INFO L225 Difference]: With dead ends: 54 [2022-02-11 00:21:57,305 INFO L226 Difference]: Without dead ends: 54 [2022-02-11 00:21:57,306 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-02-11 00:21:57,307 INFO L934 BasicCegarLoop]: 7 mSDtfsCounter, 14 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-11 00:21:57,307 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 16 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-11 00:21:57,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2022-02-11 00:21:57,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 34. [2022-02-11 00:21:57,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 33 states have (on average 2.0) internal successors, (66), 33 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:21:57,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 66 transitions. [2022-02-11 00:21:57,312 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 66 transitions. Word has length 12 [2022-02-11 00:21:57,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:21:57,312 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 66 transitions. [2022-02-11 00:21:57,312 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:21:57,313 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 66 transitions. [2022-02-11 00:21:57,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-02-11 00:21:57,313 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:21:57,313 INFO L515 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:21:57,313 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-02-11 00:21:57,313 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:21:57,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:21:57,314 INFO L85 PathProgramCache]: Analyzing trace with hash -101302491, now seen corresponding path program 4 times [2022-02-11 00:21:57,314 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:21:57,314 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [557824793] [2022-02-11 00:21:57,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:21:57,314 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:21:57,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:21:57,349 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:21:57,350 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:21:57,350 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [557824793] [2022-02-11 00:21:57,350 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [557824793] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-11 00:21:57,350 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-11 00:21:57,350 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-11 00:21:57,350 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1267943456] [2022-02-11 00:21:57,350 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-11 00:21:57,351 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-11 00:21:57,351 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:21:57,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-11 00:21:57,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-11 00:21:57,353 INFO L87 Difference]: Start difference. First operand 34 states and 66 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:21:57,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:21:57,406 INFO L93 Difference]: Finished difference Result 39 states and 71 transitions. [2022-02-11 00:21:57,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-11 00:21:57,407 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-02-11 00:21:57,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:21:57,407 INFO L225 Difference]: With dead ends: 39 [2022-02-11 00:21:57,407 INFO L226 Difference]: Without dead ends: 34 [2022-02-11 00:21:57,408 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-02-11 00:21:57,409 INFO L934 BasicCegarLoop]: 5 mSDtfsCounter, 11 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-11 00:21:57,409 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 14 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-11 00:21:57,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2022-02-11 00:21:57,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2022-02-11 00:21:57,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 33 states have (on average 1.9393939393939394) internal successors, (64), 33 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) [2022-02-11 00:21:57,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 64 transitions. [2022-02-11 00:21:57,413 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 64 transitions. Word has length 12 [2022-02-11 00:21:57,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:21:57,414 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 64 transitions. [2022-02-11 00:21:57,414 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:21:57,414 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 64 transitions. [2022-02-11 00:21:57,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-02-11 00:21:57,414 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:21:57,414 INFO L515 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:21:57,415 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-02-11 00:21:57,415 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:21:57,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:21:57,415 INFO L85 PathProgramCache]: Analyzing trace with hash -71692365, now seen corresponding path program 1 times [2022-02-11 00:21:57,415 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:21:57,415 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [754968462] [2022-02-11 00:21:57,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:21:57,416 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:21:57,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:21:57,508 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:21:57,508 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:21:57,508 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [754968462] [2022-02-11 00:21:57,508 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [754968462] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-11 00:21:57,509 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-11 00:21:57,509 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-02-11 00:21:57,509 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146341601] [2022-02-11 00:21:57,509 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-11 00:21:57,509 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-11 00:21:57,509 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:21:57,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-11 00:21:57,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-02-11 00:21:57,510 INFO L87 Difference]: Start difference. First operand 34 states and 64 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:21:57,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:21:57,574 INFO L93 Difference]: Finished difference Result 55 states and 101 transitions. [2022-02-11 00:21:57,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-11 00:21:57,575 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-02-11 00:21:57,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:21:57,577 INFO L225 Difference]: With dead ends: 55 [2022-02-11 00:21:57,577 INFO L226 Difference]: Without dead ends: 53 [2022-02-11 00:21:57,577 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-02-11 00:21:57,587 INFO L934 BasicCegarLoop]: 6 mSDtfsCounter, 14 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-11 00:21:57,587 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 16 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-11 00:21:57,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2022-02-11 00:21:57,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 35. [2022-02-11 00:21:57,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 34 states have (on average 1.9411764705882353) internal successors, (66), 34 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:21:57,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 66 transitions. [2022-02-11 00:21:57,591 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 66 transitions. Word has length 13 [2022-02-11 00:21:57,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:21:57,591 INFO L470 AbstractCegarLoop]: Abstraction has 35 states and 66 transitions. [2022-02-11 00:21:57,591 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:21:57,591 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 66 transitions. [2022-02-11 00:21:57,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-02-11 00:21:57,592 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:21:57,592 INFO L515 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:21:57,592 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-02-11 00:21:57,592 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:21:57,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:21:57,593 INFO L85 PathProgramCache]: Analyzing trace with hash 2007601463, now seen corresponding path program 2 times [2022-02-11 00:21:57,593 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:21:57,593 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1119276602] [2022-02-11 00:21:57,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:21:57,593 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:21:57,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:21:57,689 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:21:57,689 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:21:57,690 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1119276602] [2022-02-11 00:21:57,690 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1119276602] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-11 00:21:57,690 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-11 00:21:57,691 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-02-11 00:21:57,691 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [78608970] [2022-02-11 00:21:57,692 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-11 00:21:57,693 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-11 00:21:57,693 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:21:57,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-11 00:21:57,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-02-11 00:21:57,693 INFO L87 Difference]: Start difference. First operand 35 states and 66 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:21:57,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:21:57,763 INFO L93 Difference]: Finished difference Result 57 states and 107 transitions. [2022-02-11 00:21:57,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-11 00:21:57,763 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-02-11 00:21:57,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:21:57,766 INFO L225 Difference]: With dead ends: 57 [2022-02-11 00:21:57,766 INFO L226 Difference]: Without dead ends: 57 [2022-02-11 00:21:57,766 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-02-11 00:21:57,768 INFO L934 BasicCegarLoop]: 6 mSDtfsCounter, 17 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-11 00:21:57,769 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 22 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-11 00:21:57,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2022-02-11 00:21:57,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 39. [2022-02-11 00:21:57,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 38 states have (on average 1.9473684210526316) internal successors, (74), 38 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) [2022-02-11 00:21:57,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 74 transitions. [2022-02-11 00:21:57,779 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 74 transitions. Word has length 13 [2022-02-11 00:21:57,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:21:57,780 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 74 transitions. [2022-02-11 00:21:57,780 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:21:57,780 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 74 transitions. [2022-02-11 00:21:57,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-02-11 00:21:57,780 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:21:57,780 INFO L515 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:21:57,780 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-02-11 00:21:57,780 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:21:57,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:21:57,781 INFO L85 PathProgramCache]: Analyzing trace with hash 2035091755, now seen corresponding path program 3 times [2022-02-11 00:21:57,781 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:21:57,781 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [441256078] [2022-02-11 00:21:57,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:21:57,781 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:21:57,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:21:57,841 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:21:57,841 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:21:57,841 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [441256078] [2022-02-11 00:21:57,841 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [441256078] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-11 00:21:57,841 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-11 00:21:57,841 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-02-11 00:21:57,841 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [249610521] [2022-02-11 00:21:57,841 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-11 00:21:57,842 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-11 00:21:57,843 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:21:57,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-11 00:21:57,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-02-11 00:21:57,844 INFO L87 Difference]: Start difference. First operand 39 states and 74 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:21:57,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:21:57,891 INFO L93 Difference]: Finished difference Result 42 states and 78 transitions. [2022-02-11 00:21:57,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-11 00:21:57,891 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-02-11 00:21:57,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:21:57,892 INFO L225 Difference]: With dead ends: 42 [2022-02-11 00:21:57,892 INFO L226 Difference]: Without dead ends: 40 [2022-02-11 00:21:57,892 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-02-11 00:21:57,894 INFO L934 BasicCegarLoop]: 5 mSDtfsCounter, 9 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-11 00:21:57,894 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 14 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-11 00:21:57,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2022-02-11 00:21:57,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2022-02-11 00:21:57,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 39 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) [2022-02-11 00:21:57,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 76 transitions. [2022-02-11 00:21:57,903 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 76 transitions. Word has length 13 [2022-02-11 00:21:57,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:21:57,906 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 76 transitions. [2022-02-11 00:21:57,906 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:21:57,906 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 76 transitions. [2022-02-11 00:21:57,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-02-11 00:21:57,907 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:21:57,907 INFO L515 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:21:57,907 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-02-11 00:21:57,907 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:21:57,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:21:57,907 INFO L85 PathProgramCache]: Analyzing trace with hash -180581713, now seen corresponding path program 4 times [2022-02-11 00:21:57,908 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:21:57,908 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1515654615] [2022-02-11 00:21:57,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:21:57,908 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:21:57,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:21:57,968 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:21:57,969 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:21:57,969 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1515654615] [2022-02-11 00:21:57,969 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1515654615] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-11 00:21:57,969 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-11 00:21:57,969 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-02-11 00:21:57,969 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1660766478] [2022-02-11 00:21:57,969 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-11 00:21:57,969 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-11 00:21:57,969 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:21:57,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-11 00:21:57,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-02-11 00:21:57,970 INFO L87 Difference]: Start difference. First operand 40 states and 76 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:21:58,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:21:58,021 INFO L93 Difference]: Finished difference Result 44 states and 84 transitions. [2022-02-11 00:21:58,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-11 00:21:58,021 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-02-11 00:21:58,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:21:58,022 INFO L225 Difference]: With dead ends: 44 [2022-02-11 00:21:58,022 INFO L226 Difference]: Without dead ends: 44 [2022-02-11 00:21:58,022 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-02-11 00:21:58,022 INFO L934 BasicCegarLoop]: 6 mSDtfsCounter, 9 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-11 00:21:58,022 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 22 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-11 00:21:58,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-02-11 00:21:58,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 39. [2022-02-11 00:21:58,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 38 states have (on average 1.9473684210526316) internal successors, (74), 38 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) [2022-02-11 00:21:58,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 74 transitions. [2022-02-11 00:21:58,025 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 74 transitions. Word has length 13 [2022-02-11 00:21:58,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:21:58,025 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 74 transitions. [2022-02-11 00:21:58,025 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:21:58,025 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 74 transitions. [2022-02-11 00:21:58,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-02-11 00:21:58,025 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:21:58,025 INFO L515 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:21:58,026 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-02-11 00:21:58,026 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:21:58,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:21:58,026 INFO L85 PathProgramCache]: Analyzing trace with hash 892503667, now seen corresponding path program 5 times [2022-02-11 00:21:58,026 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:21:58,026 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1065330021] [2022-02-11 00:21:58,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:21:58,026 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:21:58,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:21:58,073 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:21:58,074 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:21:58,074 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1065330021] [2022-02-11 00:21:58,074 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1065330021] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-11 00:21:58,074 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-11 00:21:58,074 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-02-11 00:21:58,074 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048815107] [2022-02-11 00:21:58,074 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-11 00:21:58,074 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-11 00:21:58,074 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:21:58,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-11 00:21:58,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-02-11 00:21:58,075 INFO L87 Difference]: Start difference. First operand 39 states and 74 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:21:58,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:21:58,109 INFO L93 Difference]: Finished difference Result 48 states and 92 transitions. [2022-02-11 00:21:58,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-02-11 00:21:58,110 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-02-11 00:21:58,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:21:58,110 INFO L225 Difference]: With dead ends: 48 [2022-02-11 00:21:58,110 INFO L226 Difference]: Without dead ends: 48 [2022-02-11 00:21:58,110 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-02-11 00:21:58,111 INFO L934 BasicCegarLoop]: 6 mSDtfsCounter, 26 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-11 00:21:58,111 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 17 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-11 00:21:58,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-02-11 00:21:58,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 39. [2022-02-11 00:21:58,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 38 states have (on average 1.9473684210526316) internal successors, (74), 38 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) [2022-02-11 00:21:58,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 74 transitions. [2022-02-11 00:21:58,114 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 74 transitions. Word has length 13 [2022-02-11 00:21:58,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:21:58,114 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 74 transitions. [2022-02-11 00:21:58,114 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:21:58,114 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 74 transitions. [2022-02-11 00:21:58,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-02-11 00:21:58,114 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:21:58,114 INFO L515 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:21:58,114 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-02-11 00:21:58,114 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:21:58,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:21:58,115 INFO L85 PathProgramCache]: Analyzing trace with hash 1512007823, now seen corresponding path program 1 times [2022-02-11 00:21:58,115 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:21:58,115 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [823586330] [2022-02-11 00:21:58,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:21:58,115 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:21:58,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:21:58,467 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:21:58,468 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:21:58,468 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [823586330] [2022-02-11 00:21:58,468 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [823586330] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:21:58,468 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [647110028] [2022-02-11 00:21:58,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:21:58,468 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:21:58,468 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:21:58,496 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) [2022-02-11 00:21:58,555 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-02-11 00:21:58,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:21:58,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 23 conjunts are in the unsatisfiable core [2022-02-11 00:21:58,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:21:59,060 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 59 [2022-02-11 00:21:59,065 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 47 [2022-02-11 00:21:59,221 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:21:59,221 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:21:59,609 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-11 00:21:59,610 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 117 treesize of output 100 [2022-02-11 00:21:59,616 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 97 treesize of output 77 [2022-02-11 00:21:59,712 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:21:59,713 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [647110028] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:21:59,713 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:21:59,713 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2022-02-11 00:21:59,713 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776154184] [2022-02-11 00:21:59,713 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:21:59,713 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-11 00:21:59,714 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:21:59,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-11 00:21:59,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2022-02-11 00:21:59,714 INFO L87 Difference]: Start difference. First operand 39 states and 74 transitions. Second operand has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:22:00,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:22:00,595 INFO L93 Difference]: Finished difference Result 108 states and 193 transitions. [2022-02-11 00:22:00,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-02-11 00:22:00,595 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-02-11 00:22:00,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:22:00,596 INFO L225 Difference]: With dead ends: 108 [2022-02-11 00:22:00,596 INFO L226 Difference]: Without dead ends: 88 [2022-02-11 00:22:00,596 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=178, Invalid=692, Unknown=0, NotChecked=0, Total=870 [2022-02-11 00:22:00,597 INFO L934 BasicCegarLoop]: 8 mSDtfsCounter, 105 mSDsluCounter, 230 mSDsCounter, 0 mSdLazyCounter, 365 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 395 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 365 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-11 00:22:00,597 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [105 Valid, 108 Invalid, 395 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 365 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-11 00:22:00,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2022-02-11 00:22:00,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 45. [2022-02-11 00:22:00,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 44 states have (on average 1.9318181818181819) internal successors, (85), 44 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:22:00,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 85 transitions. [2022-02-11 00:22:00,600 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 85 transitions. Word has length 14 [2022-02-11 00:22:00,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:22:00,600 INFO L470 AbstractCegarLoop]: Abstraction has 45 states and 85 transitions. [2022-02-11 00:22:00,600 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:22:00,600 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 85 transitions. [2022-02-11 00:22:00,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-02-11 00:22:00,601 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:22:00,601 INFO L515 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:22:00,621 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-02-11 00:22:00,803 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-02-11 00:22:00,804 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:22:00,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:22:00,804 INFO L85 PathProgramCache]: Analyzing trace with hash 1129287435, now seen corresponding path program 2 times [2022-02-11 00:22:00,804 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:22:00,804 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [16118076] [2022-02-11 00:22:00,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:22:00,804 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:22:00,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:22:01,062 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:22:01,063 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:22:01,063 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [16118076] [2022-02-11 00:22:01,063 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [16118076] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:22:01,063 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1209134434] [2022-02-11 00:22:01,063 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-11 00:22:01,063 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:22:01,064 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:22:01,065 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) [2022-02-11 00:22:01,103 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-02-11 00:22:01,107 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-11 00:22:01,107 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:22:01,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 25 conjunts are in the unsatisfiable core [2022-02-11 00:22:01,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:22:01,382 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 59 [2022-02-11 00:22:01,385 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 47 [2022-02-11 00:22:01,492 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:22:01,492 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:22:01,860 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-11 00:22:01,861 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 96 treesize of output 83 [2022-02-11 00:22:01,869 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 80 treesize of output 64 [2022-02-11 00:22:01,950 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:22:01,950 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1209134434] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:22:01,951 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:22:01,951 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2022-02-11 00:22:01,956 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1103076683] [2022-02-11 00:22:01,956 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:22:01,957 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-11 00:22:01,957 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:22:01,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-11 00:22:01,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2022-02-11 00:22:01,958 INFO L87 Difference]: Start difference. First operand 45 states and 85 transitions. Second operand has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:22:03,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:22:03,682 INFO L93 Difference]: Finished difference Result 140 states and 250 transitions. [2022-02-11 00:22:03,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-02-11 00:22:03,682 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-02-11 00:22:03,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:22:03,683 INFO L225 Difference]: With dead ends: 140 [2022-02-11 00:22:03,683 INFO L226 Difference]: Without dead ends: 101 [2022-02-11 00:22:03,683 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=288, Invalid=902, Unknown=0, NotChecked=0, Total=1190 [2022-02-11 00:22:03,684 INFO L934 BasicCegarLoop]: 8 mSDtfsCounter, 86 mSDsluCounter, 231 mSDsCounter, 0 mSdLazyCounter, 363 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 403 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 363 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-11 00:22:03,684 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [86 Valid, 129 Invalid, 403 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 363 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-11 00:22:03,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2022-02-11 00:22:03,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 48. [2022-02-11 00:22:03,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 47 states have (on average 2.0) internal successors, (94), 47 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:22:03,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 94 transitions. [2022-02-11 00:22:03,687 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 94 transitions. Word has length 14 [2022-02-11 00:22:03,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:22:03,687 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 94 transitions. [2022-02-11 00:22:03,687 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:22:03,687 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 94 transitions. [2022-02-11 00:22:03,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-02-11 00:22:03,693 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:22:03,693 INFO L515 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:22:03,710 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-02-11 00:22:03,907 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,SelfDestructingSolverStorable10 [2022-02-11 00:22:03,908 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:22:03,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:22:03,908 INFO L85 PathProgramCache]: Analyzing trace with hash 2141979967, now seen corresponding path program 3 times [2022-02-11 00:22:03,908 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:22:03,908 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1926339101] [2022-02-11 00:22:03,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:22:03,908 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:22:03,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:22:04,124 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:22:04,124 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:22:04,125 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1926339101] [2022-02-11 00:22:04,125 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1926339101] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:22:04,125 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [998226619] [2022-02-11 00:22:04,125 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-11 00:22:04,125 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:22:04,125 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:22:04,126 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) [2022-02-11 00:22:04,127 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-02-11 00:22:04,155 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-02-11 00:22:04,155 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:22:04,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 23 conjunts are in the unsatisfiable core [2022-02-11 00:22:04,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:22:04,383 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 93 treesize of output 77 [2022-02-11 00:22:04,386 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 77 treesize of output 61 [2022-02-11 00:22:04,608 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:22:04,609 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:22:04,988 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-11 00:22:04,988 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 122 treesize of output 105 [2022-02-11 00:22:04,993 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 102 treesize of output 82 [2022-02-11 00:22:05,073 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:22:05,074 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [998226619] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:22:05,074 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:22:05,074 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2022-02-11 00:22:05,074 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2088612677] [2022-02-11 00:22:05,074 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:22:05,074 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-11 00:22:05,074 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:22:05,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-11 00:22:05,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2022-02-11 00:22:05,075 INFO L87 Difference]: Start difference. First operand 48 states and 94 transitions. Second operand has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:22:05,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:22:05,766 INFO L93 Difference]: Finished difference Result 112 states and 194 transitions. [2022-02-11 00:22:05,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-11 00:22:05,766 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-02-11 00:22:05,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:22:05,767 INFO L225 Difference]: With dead ends: 112 [2022-02-11 00:22:05,767 INFO L226 Difference]: Without dead ends: 98 [2022-02-11 00:22:05,767 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=139, Invalid=563, Unknown=0, NotChecked=0, Total=702 [2022-02-11 00:22:05,768 INFO L934 BasicCegarLoop]: 13 mSDtfsCounter, 82 mSDsluCounter, 246 mSDsCounter, 0 mSdLazyCounter, 385 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 411 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 385 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-11 00:22:05,768 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [82 Valid, 144 Invalid, 411 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 385 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-11 00:22:05,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2022-02-11 00:22:05,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 50. [2022-02-11 00:22:05,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 49 states have (on average 2.020408163265306) internal successors, (99), 49 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:22:05,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 99 transitions. [2022-02-11 00:22:05,770 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 99 transitions. Word has length 14 [2022-02-11 00:22:05,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:22:05,771 INFO L470 AbstractCegarLoop]: Abstraction has 50 states and 99 transitions. [2022-02-11 00:22:05,771 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:22:05,771 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 99 transitions. [2022-02-11 00:22:05,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-02-11 00:22:05,771 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:22:05,771 INFO L515 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:22:05,799 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-02-11 00:22:05,991 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:22:05,991 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:22:05,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:22:05,992 INFO L85 PathProgramCache]: Analyzing trace with hash -73693501, now seen corresponding path program 4 times [2022-02-11 00:22:05,992 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:22:05,992 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1497213909] [2022-02-11 00:22:05,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:22:05,992 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:22:06,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:22:06,118 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:22:06,119 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:22:06,119 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1497213909] [2022-02-11 00:22:06,119 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1497213909] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:22:06,119 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1971109662] [2022-02-11 00:22:06,119 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-11 00:22:06,119 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:22:06,119 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:22:06,120 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) [2022-02-11 00:22:06,121 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-02-11 00:22:06,150 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-11 00:22:06,150 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:22:06,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 25 conjunts are in the unsatisfiable core [2022-02-11 00:22:06,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:22:06,344 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 101 treesize of output 85 [2022-02-11 00:22:06,348 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 85 treesize of output 69 [2022-02-11 00:22:06,642 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:22:06,642 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:22:07,146 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-11 00:22:07,146 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 120 treesize of output 103 [2022-02-11 00:22:07,152 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 100 treesize of output 80 [2022-02-11 00:22:07,280 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:22:07,280 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1971109662] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:22:07,280 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:22:07,280 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2022-02-11 00:22:07,280 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [459712071] [2022-02-11 00:22:07,280 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:22:07,280 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-02-11 00:22:07,281 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:22:07,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-02-11 00:22:07,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2022-02-11 00:22:07,281 INFO L87 Difference]: Start difference. First operand 50 states and 99 transitions. Second operand has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:22:08,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:22:08,317 INFO L93 Difference]: Finished difference Result 196 states and 323 transitions. [2022-02-11 00:22:08,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-02-11 00:22:08,317 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have 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 [2022-02-11 00:22:08,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:22:08,318 INFO L225 Difference]: With dead ends: 196 [2022-02-11 00:22:08,318 INFO L226 Difference]: Without dead ends: 156 [2022-02-11 00:22:08,318 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=208, Invalid=722, Unknown=0, NotChecked=0, Total=930 [2022-02-11 00:22:08,318 INFO L934 BasicCegarLoop]: 13 mSDtfsCounter, 127 mSDsluCounter, 288 mSDsCounter, 0 mSdLazyCounter, 409 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 173 SdHoareTripleChecker+Invalid, 454 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 409 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-11 00:22:08,319 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [127 Valid, 173 Invalid, 454 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 409 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-11 00:22:08,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2022-02-11 00:22:08,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 56. [2022-02-11 00:22:08,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 55 states have (on average 2.1636363636363636) internal successors, (119), 55 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:22:08,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 119 transitions. [2022-02-11 00:22:08,322 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 119 transitions. Word has length 14 [2022-02-11 00:22:08,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:22:08,322 INFO L470 AbstractCegarLoop]: Abstraction has 56 states and 119 transitions. [2022-02-11 00:22:08,322 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:22:08,322 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 119 transitions. [2022-02-11 00:22:08,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-02-11 00:22:08,323 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:22:08,323 INFO L515 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:22:08,340 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-02-11 00:22:08,539 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:22:08,540 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:22:08,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:22:08,540 INFO L85 PathProgramCache]: Analyzing trace with hash 2072477259, now seen corresponding path program 5 times [2022-02-11 00:22:08,540 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:22:08,540 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1622212136] [2022-02-11 00:22:08,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:22:08,540 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:22:08,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:22:08,654 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:22:08,655 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:22:08,655 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1622212136] [2022-02-11 00:22:08,655 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1622212136] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:22:08,655 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1285189474] [2022-02-11 00:22:08,655 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-11 00:22:08,655 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:22:08,655 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:22:08,656 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) [2022-02-11 00:22:08,657 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-02-11 00:22:08,683 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-11 00:22:08,684 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:22:08,684 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 25 conjunts are in the unsatisfiable core [2022-02-11 00:22:08,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:22:08,826 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 99 treesize of output 83 [2022-02-11 00:22:08,835 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 83 treesize of output 67 [2022-02-11 00:22:09,113 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:22:09,114 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:22:09,495 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-11 00:22:09,495 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 104 treesize of output 91 [2022-02-11 00:22:09,500 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 88 treesize of output 72 [2022-02-11 00:22:09,602 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:22:09,602 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1285189474] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:22:09,602 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:22:09,602 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2022-02-11 00:22:09,602 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [752163921] [2022-02-11 00:22:09,602 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:22:09,602 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-02-11 00:22:09,602 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:22:09,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-02-11 00:22:09,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2022-02-11 00:22:09,603 INFO L87 Difference]: Start difference. First operand 56 states and 119 transitions. Second operand has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:22:10,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:22:10,173 INFO L93 Difference]: Finished difference Result 144 states and 274 transitions. [2022-02-11 00:22:10,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-02-11 00:22:10,174 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have 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 [2022-02-11 00:22:10,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:22:10,174 INFO L225 Difference]: With dead ends: 144 [2022-02-11 00:22:10,174 INFO L226 Difference]: Without dead ends: 111 [2022-02-11 00:22:10,175 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=171, Invalid=531, Unknown=0, NotChecked=0, Total=702 [2022-02-11 00:22:10,175 INFO L934 BasicCegarLoop]: 9 mSDtfsCounter, 110 mSDsluCounter, 220 mSDsCounter, 0 mSdLazyCounter, 355 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 408 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 355 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-11 00:22:10,175 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [110 Valid, 120 Invalid, 408 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 355 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-11 00:22:10,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2022-02-11 00:22:10,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 63. [2022-02-11 00:22:10,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 62 states have (on average 2.193548387096774) internal successors, (136), 62 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:22:10,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 136 transitions. [2022-02-11 00:22:10,178 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 136 transitions. Word has length 14 [2022-02-11 00:22:10,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:22:10,178 INFO L470 AbstractCegarLoop]: Abstraction has 63 states and 136 transitions. [2022-02-11 00:22:10,178 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:22:10,178 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 136 transitions. [2022-02-11 00:22:10,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-02-11 00:22:10,179 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:22:10,179 INFO L515 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:22:10,199 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-02-11 00:22:10,392 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-02-11 00:22:10,392 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:22:10,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:22:10,393 INFO L85 PathProgramCache]: Analyzing trace with hash -1267189049, now seen corresponding path program 6 times [2022-02-11 00:22:10,393 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:22:10,393 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1473782679] [2022-02-11 00:22:10,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:22:10,393 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:22:10,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:22:10,686 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:22:10,687 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:22:10,687 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1473782679] [2022-02-11 00:22:10,687 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1473782679] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:22:10,687 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1181421105] [2022-02-11 00:22:10,687 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-11 00:22:10,687 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:22:10,687 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:22:10,688 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) [2022-02-11 00:22:10,689 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-02-11 00:22:10,718 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-02-11 00:22:10,718 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:22:10,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 25 conjunts are in the unsatisfiable core [2022-02-11 00:22:10,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:22:10,921 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 61 [2022-02-11 00:22:10,923 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 49 [2022-02-11 00:22:11,039 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:22:11,040 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:22:11,370 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-11 00:22:11,370 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 122 treesize of output 105 [2022-02-11 00:22:11,387 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 102 treesize of output 82 [2022-02-11 00:22:11,495 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:22:11,496 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1181421105] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:22:11,496 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:22:11,496 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2022-02-11 00:22:11,496 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1140384520] [2022-02-11 00:22:11,496 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:22:11,496 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-11 00:22:11,496 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:22:11,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-11 00:22:11,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2022-02-11 00:22:11,497 INFO L87 Difference]: Start difference. First operand 63 states and 136 transitions. Second operand has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:22:12,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:22:12,098 INFO L93 Difference]: Finished difference Result 150 states and 271 transitions. [2022-02-11 00:22:12,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-02-11 00:22:12,098 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-02-11 00:22:12,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:22:12,099 INFO L225 Difference]: With dead ends: 150 [2022-02-11 00:22:12,099 INFO L226 Difference]: Without dead ends: 125 [2022-02-11 00:22:12,099 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=191, Invalid=621, Unknown=0, NotChecked=0, Total=812 [2022-02-11 00:22:12,100 INFO L934 BasicCegarLoop]: 9 mSDtfsCounter, 97 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 278 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 330 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 278 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-11 00:22:12,100 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [97 Valid, 103 Invalid, 330 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 278 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-11 00:22:12,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2022-02-11 00:22:12,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 67. [2022-02-11 00:22:12,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 66 states have (on average 2.227272727272727) internal successors, (147), 66 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:22:12,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 147 transitions. [2022-02-11 00:22:12,109 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 147 transitions. Word has length 14 [2022-02-11 00:22:12,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:22:12,109 INFO L470 AbstractCegarLoop]: Abstraction has 67 states and 147 transitions. [2022-02-11 00:22:12,109 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:22:12,109 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 147 transitions. [2022-02-11 00:22:12,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-02-11 00:22:12,110 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:22:12,110 INFO L515 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:22:12,128 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-02-11 00:22:12,312 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-02-11 00:22:12,312 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:22:12,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:22:12,313 INFO L85 PathProgramCache]: Analyzing trace with hash 812104779, now seen corresponding path program 7 times [2022-02-11 00:22:12,313 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:22:12,313 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [309268354] [2022-02-11 00:22:12,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:22:12,313 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:22:12,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:22:12,441 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:22:12,442 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:22:12,442 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [309268354] [2022-02-11 00:22:12,442 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [309268354] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:22:12,442 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [224775107] [2022-02-11 00:22:12,442 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-11 00:22:12,442 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:22:12,442 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:22:12,443 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) [2022-02-11 00:22:12,444 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-02-11 00:22:12,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:22:12,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 25 conjunts are in the unsatisfiable core [2022-02-11 00:22:12,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:22:12,605 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 99 treesize of output 83 [2022-02-11 00:22:12,610 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 83 treesize of output 67 [2022-02-11 00:22:12,982 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:22:12,982 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:22:13,507 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-11 00:22:13,507 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 116 treesize of output 101 [2022-02-11 00:22:13,518 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 98 treesize of output 80 [2022-02-11 00:22:13,631 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:22:13,631 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [224775107] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:22:13,631 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:22:13,631 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2022-02-11 00:22:13,631 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1040886425] [2022-02-11 00:22:13,631 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:22:13,632 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-02-11 00:22:13,632 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:22:13,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-02-11 00:22:13,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2022-02-11 00:22:13,632 INFO L87 Difference]: Start difference. First operand 67 states and 147 transitions. Second operand has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:22:14,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:22:14,293 INFO L93 Difference]: Finished difference Result 178 states and 319 transitions. [2022-02-11 00:22:14,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-02-11 00:22:14,294 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have 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 [2022-02-11 00:22:14,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:22:14,295 INFO L225 Difference]: With dead ends: 178 [2022-02-11 00:22:14,295 INFO L226 Difference]: Without dead ends: 145 [2022-02-11 00:22:14,295 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=168, Invalid=534, Unknown=0, NotChecked=0, Total=702 [2022-02-11 00:22:14,295 INFO L934 BasicCegarLoop]: 11 mSDtfsCounter, 132 mSDsluCounter, 254 mSDsCounter, 0 mSdLazyCounter, 352 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 400 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 352 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-11 00:22:14,296 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [132 Valid, 153 Invalid, 400 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 352 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-11 00:22:14,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2022-02-11 00:22:14,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 65. [2022-02-11 00:22:14,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 64 states have (on average 2.203125) internal successors, (141), 64 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:22:14,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 141 transitions. [2022-02-11 00:22:14,298 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 141 transitions. Word has length 14 [2022-02-11 00:22:14,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:22:14,298 INFO L470 AbstractCegarLoop]: Abstraction has 65 states and 141 transitions. [2022-02-11 00:22:14,298 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:22:14,298 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 141 transitions. [2022-02-11 00:22:14,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-02-11 00:22:14,299 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:22:14,299 INFO L515 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:22:14,315 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-02-11 00:22:14,506 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:22:14,506 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:22:14,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:22:14,506 INFO L85 PathProgramCache]: Analyzing trace with hash -1336691757, now seen corresponding path program 8 times [2022-02-11 00:22:14,506 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:22:14,507 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1421966597] [2022-02-11 00:22:14,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:22:14,507 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:22:14,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:22:14,619 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:22:14,619 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:22:14,619 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1421966597] [2022-02-11 00:22:14,619 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1421966597] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:22:14,619 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [958677654] [2022-02-11 00:22:14,619 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-11 00:22:14,619 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:22:14,619 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:22:14,620 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) [2022-02-11 00:22:14,621 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-02-11 00:22:14,647 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-11 00:22:14,647 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:22:14,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 25 conjunts are in the unsatisfiable core [2022-02-11 00:22:14,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:22:14,788 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 101 treesize of output 85 [2022-02-11 00:22:14,790 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 85 treesize of output 69 [2022-02-11 00:22:15,073 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:22:15,073 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:22:15,473 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-11 00:22:15,474 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 114 treesize of output 97 [2022-02-11 00:22:15,479 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 94 treesize of output 74 [2022-02-11 00:22:15,561 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:22:15,561 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [958677654] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:22:15,562 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:22:15,562 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2022-02-11 00:22:15,562 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1416009009] [2022-02-11 00:22:15,562 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:22:15,562 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-02-11 00:22:15,562 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:22:15,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-02-11 00:22:15,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2022-02-11 00:22:15,563 INFO L87 Difference]: Start difference. First operand 65 states and 141 transitions. Second operand has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:22:16,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:22:16,288 INFO L93 Difference]: Finished difference Result 166 states and 315 transitions. [2022-02-11 00:22:16,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-02-11 00:22:16,289 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have 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 [2022-02-11 00:22:16,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:22:16,289 INFO L225 Difference]: With dead ends: 166 [2022-02-11 00:22:16,290 INFO L226 Difference]: Without dead ends: 133 [2022-02-11 00:22:16,290 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=211, Invalid=601, Unknown=0, NotChecked=0, Total=812 [2022-02-11 00:22:16,290 INFO L934 BasicCegarLoop]: 10 mSDtfsCounter, 131 mSDsluCounter, 232 mSDsCounter, 0 mSdLazyCounter, 372 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 424 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 372 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-11 00:22:16,290 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [131 Valid, 126 Invalid, 424 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 372 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-11 00:22:16,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2022-02-11 00:22:16,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 65. [2022-02-11 00:22:16,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 64 states have (on average 2.203125) internal successors, (141), 64 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:22:16,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 141 transitions. [2022-02-11 00:22:16,293 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 141 transitions. Word has length 14 [2022-02-11 00:22:16,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:22:16,293 INFO L470 AbstractCegarLoop]: Abstraction has 65 states and 141 transitions. [2022-02-11 00:22:16,293 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:22:16,293 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 141 transitions. [2022-02-11 00:22:16,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-02-11 00:22:16,293 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:22:16,293 INFO L515 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:22:16,320 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-02-11 00:22:16,509 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,SelfDestructingSolverStorable16 [2022-02-11 00:22:16,509 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:22:16,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:22:16,509 INFO L85 PathProgramCache]: Analyzing trace with hash 1864183951, now seen corresponding path program 9 times [2022-02-11 00:22:16,509 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:22:16,509 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [202217877] [2022-02-11 00:22:16,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:22:16,510 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:22:16,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:22:16,649 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:22:16,650 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:22:16,650 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [202217877] [2022-02-11 00:22:16,650 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [202217877] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:22:16,650 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1727867140] [2022-02-11 00:22:16,650 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-11 00:22:16,650 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:22:16,650 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:22:16,651 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) [2022-02-11 00:22:16,652 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-02-11 00:22:16,677 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-11 00:22:16,677 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:22:16,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 23 conjunts are in the unsatisfiable core [2022-02-11 00:22:16,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:22:16,846 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 99 treesize of output 83 [2022-02-11 00:22:16,848 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 83 treesize of output 67 [2022-02-11 00:22:17,106 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:22:17,107 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:22:17,463 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-11 00:22:17,463 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 100 treesize of output 87 [2022-02-11 00:22:17,467 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 84 treesize of output 68 [2022-02-11 00:22:17,557 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:22:17,557 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1727867140] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:22:17,557 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:22:17,557 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2022-02-11 00:22:17,557 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [548153828] [2022-02-11 00:22:17,557 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:22:17,558 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-02-11 00:22:17,558 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:22:17,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-02-11 00:22:17,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2022-02-11 00:22:17,558 INFO L87 Difference]: Start difference. First operand 65 states and 141 transitions. Second operand has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:22:18,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:22:18,452 INFO L93 Difference]: Finished difference Result 154 states and 298 transitions. [2022-02-11 00:22:18,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-02-11 00:22:18,452 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have 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 [2022-02-11 00:22:18,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:22:18,453 INFO L225 Difference]: With dead ends: 154 [2022-02-11 00:22:18,453 INFO L226 Difference]: Without dead ends: 135 [2022-02-11 00:22:18,453 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=167, Invalid=535, Unknown=0, NotChecked=0, Total=702 [2022-02-11 00:22:18,453 INFO L934 BasicCegarLoop]: 10 mSDtfsCounter, 131 mSDsluCounter, 290 mSDsCounter, 0 mSdLazyCounter, 465 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 512 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 465 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-11 00:22:18,454 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [131 Valid, 148 Invalid, 512 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 465 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-11 00:22:18,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2022-02-11 00:22:18,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 74. [2022-02-11 00:22:18,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 73 states have (on average 2.191780821917808) internal successors, (160), 73 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:22:18,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 160 transitions. [2022-02-11 00:22:18,456 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 160 transitions. Word has length 14 [2022-02-11 00:22:18,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:22:18,456 INFO L470 AbstractCegarLoop]: Abstraction has 74 states and 160 transitions. [2022-02-11 00:22:18,456 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:22:18,456 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 160 transitions. [2022-02-11 00:22:18,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-02-11 00:22:18,457 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:22:18,457 INFO L515 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:22:18,475 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-02-11 00:22:18,675 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,SelfDestructingSolverStorable17 [2022-02-11 00:22:18,675 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:22:18,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:22:18,676 INFO L85 PathProgramCache]: Analyzing trace with hash 1784249399, now seen corresponding path program 10 times [2022-02-11 00:22:18,676 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:22:18,676 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [442386191] [2022-02-11 00:22:18,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:22:18,676 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:22:18,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:22:18,745 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:22:18,746 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:22:18,746 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [442386191] [2022-02-11 00:22:18,746 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [442386191] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:22:18,746 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [988284685] [2022-02-11 00:22:18,746 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-11 00:22:18,746 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:22:18,746 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:22:18,747 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) [2022-02-11 00:22:18,748 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-02-11 00:22:18,777 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-11 00:22:18,778 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:22:18,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 15 conjunts are in the unsatisfiable core [2022-02-11 00:22:18,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:22:18,861 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:22:18,861 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:22:18,975 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-11 00:22:18,975 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 30 treesize of output 25 [2022-02-11 00:22:18,982 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:22:18,982 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [988284685] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:22:18,982 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:22:18,982 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2022-02-11 00:22:18,983 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [192128651] [2022-02-11 00:22:18,983 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:22:18,983 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-02-11 00:22:18,983 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:22:18,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-02-11 00:22:18,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2022-02-11 00:22:18,983 INFO L87 Difference]: Start difference. First operand 74 states and 160 transitions. Second operand has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:22:19,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:22:19,072 INFO L93 Difference]: Finished difference Result 111 states and 228 transitions. [2022-02-11 00:22:19,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-02-11 00:22:19,073 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-02-11 00:22:19,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:22:19,073 INFO L225 Difference]: With dead ends: 111 [2022-02-11 00:22:19,073 INFO L226 Difference]: Without dead ends: 111 [2022-02-11 00:22:19,074 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2022-02-11 00:22:19,074 INFO L934 BasicCegarLoop]: 12 mSDtfsCounter, 54 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 173 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 176 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 173 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-11 00:22:19,074 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 68 Invalid, 176 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 173 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-11 00:22:19,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2022-02-11 00:22:19,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 72. [2022-02-11 00:22:19,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 71 states have (on average 2.211267605633803) internal successors, (157), 71 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:22:19,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 157 transitions. [2022-02-11 00:22:19,076 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 157 transitions. Word has length 15 [2022-02-11 00:22:19,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:22:19,076 INFO L470 AbstractCegarLoop]: Abstraction has 72 states and 157 transitions. [2022-02-11 00:22:19,076 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:22:19,076 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 157 transitions. [2022-02-11 00:22:19,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-02-11 00:22:19,077 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:22:19,077 INFO L515 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:22:19,093 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-02-11 00:22:19,283 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:22:19,283 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:22:19,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:22:19,284 INFO L85 PathProgramCache]: Analyzing trace with hash -1498025365, now seen corresponding path program 11 times [2022-02-11 00:22:19,284 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:22:19,284 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [504381708] [2022-02-11 00:22:19,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:22:19,284 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:22:19,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:22:19,355 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:22:19,355 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:22:19,355 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [504381708] [2022-02-11 00:22:19,355 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [504381708] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:22:19,355 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [541436364] [2022-02-11 00:22:19,355 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-11 00:22:19,355 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:22:19,355 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:22:19,356 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) [2022-02-11 00:22:19,358 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-02-11 00:22:19,386 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-11 00:22:19,386 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:22:19,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 15 conjunts are in the unsatisfiable core [2022-02-11 00:22:19,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:22:19,502 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:22:19,503 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:22:19,640 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-11 00:22:19,641 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 25 [2022-02-11 00:22:19,645 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:22:19,645 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [541436364] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:22:19,645 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:22:19,646 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2022-02-11 00:22:19,646 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1994768412] [2022-02-11 00:22:19,646 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:22:19,646 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-02-11 00:22:19,646 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:22:19,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-02-11 00:22:19,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2022-02-11 00:22:19,646 INFO L87 Difference]: Start difference. First operand 72 states and 157 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:22:19,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:22:19,799 INFO L93 Difference]: Finished difference Result 112 states and 231 transitions. [2022-02-11 00:22:19,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-11 00:22:19,799 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-02-11 00:22:19,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:22:19,799 INFO L225 Difference]: With dead ends: 112 [2022-02-11 00:22:19,800 INFO L226 Difference]: Without dead ends: 112 [2022-02-11 00:22:19,800 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2022-02-11 00:22:19,800 INFO L934 BasicCegarLoop]: 12 mSDtfsCounter, 36 mSDsluCounter, 156 mSDsCounter, 0 mSdLazyCounter, 236 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 245 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 236 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-11 00:22:19,800 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 98 Invalid, 245 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 236 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-11 00:22:19,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2022-02-11 00:22:19,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 71. [2022-02-11 00:22:19,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 70 states have (on average 2.2) internal successors, (154), 70 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:22:19,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 154 transitions. [2022-02-11 00:22:19,802 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 154 transitions. Word has length 15 [2022-02-11 00:22:19,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:22:19,803 INFO L470 AbstractCegarLoop]: Abstraction has 71 states and 154 transitions. [2022-02-11 00:22:19,803 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:22:19,803 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 154 transitions. [2022-02-11 00:22:19,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-02-11 00:22:19,803 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:22:19,803 INFO L515 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:22:19,822 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-02-11 00:22:20,009 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:22:20,009 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:22:20,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:22:20,009 INFO L85 PathProgramCache]: Analyzing trace with hash 648145395, now seen corresponding path program 12 times [2022-02-11 00:22:20,009 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:22:20,009 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1355267922] [2022-02-11 00:22:20,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:22:20,010 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:22:20,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:22:20,083 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:22:20,084 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:22:20,084 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1355267922] [2022-02-11 00:22:20,084 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1355267922] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:22:20,084 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1139169530] [2022-02-11 00:22:20,084 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-11 00:22:20,084 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:22:20,084 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:22:20,085 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) [2022-02-11 00:22:20,086 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-02-11 00:22:20,113 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-02-11 00:22:20,113 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:22:20,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 15 conjunts are in the unsatisfiable core [2022-02-11 00:22:20,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:22:20,230 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 73 [2022-02-11 00:22:20,232 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 57 [2022-02-11 00:22:20,309 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:22:20,309 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:22:20,422 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-11 00:22:20,422 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 30 treesize of output 25 [2022-02-11 00:22:20,426 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:22:20,426 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1139169530] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:22:20,426 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:22:20,426 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2022-02-11 00:22:20,426 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [847972096] [2022-02-11 00:22:20,426 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:22:20,426 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-02-11 00:22:20,427 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:22:20,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-02-11 00:22:20,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2022-02-11 00:22:20,427 INFO L87 Difference]: Start difference. First operand 71 states and 154 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:22:20,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:22:20,710 INFO L93 Difference]: Finished difference Result 137 states and 266 transitions. [2022-02-11 00:22:20,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-11 00:22:20,710 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-02-11 00:22:20,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:22:20,711 INFO L225 Difference]: With dead ends: 137 [2022-02-11 00:22:20,711 INFO L226 Difference]: Without dead ends: 137 [2022-02-11 00:22:20,711 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=106, Invalid=274, Unknown=0, NotChecked=0, Total=380 [2022-02-11 00:22:20,711 INFO L934 BasicCegarLoop]: 12 mSDtfsCounter, 86 mSDsluCounter, 155 mSDsCounter, 0 mSdLazyCounter, 256 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 269 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 256 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-11 00:22:20,711 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [86 Valid, 95 Invalid, 269 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 256 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-11 00:22:20,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2022-02-11 00:22:20,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 71. [2022-02-11 00:22:20,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 70 states have (on average 2.2) internal successors, (154), 70 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:22:20,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 154 transitions. [2022-02-11 00:22:20,714 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 154 transitions. Word has length 15 [2022-02-11 00:22:20,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:22:20,714 INFO L470 AbstractCegarLoop]: Abstraction has 71 states and 154 transitions. [2022-02-11 00:22:20,714 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:22:20,714 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 154 transitions. [2022-02-11 00:22:20,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-02-11 00:22:20,715 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:22:20,715 INFO L515 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:22:20,733 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-02-11 00:22:20,927 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,SelfDestructingSolverStorable20 [2022-02-11 00:22:20,927 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:22:20,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:22:20,928 INFO L85 PathProgramCache]: Analyzing trace with hash 1235060997, now seen corresponding path program 13 times [2022-02-11 00:22:20,928 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:22:20,928 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1238606167] [2022-02-11 00:22:20,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:22:20,928 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:22:20,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:22:20,989 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:22:20,990 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:22:20,990 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1238606167] [2022-02-11 00:22:20,990 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1238606167] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:22:20,990 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1288930129] [2022-02-11 00:22:20,990 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-11 00:22:20,990 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:22:20,990 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:22:20,991 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) [2022-02-11 00:22:20,992 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-02-11 00:22:21,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:22:21,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 15 conjunts are in the unsatisfiable core [2022-02-11 00:22:21,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:22:21,123 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 87 treesize of output 71 [2022-02-11 00:22:21,126 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 55 [2022-02-11 00:22:21,199 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:22:21,199 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:22:21,306 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-11 00:22:21,307 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 30 treesize of output 25 [2022-02-11 00:22:21,312 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:22:21,312 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1288930129] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:22:21,313 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:22:21,313 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2022-02-11 00:22:21,313 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590908910] [2022-02-11 00:22:21,313 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:22:21,313 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-02-11 00:22:21,313 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:22:21,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-02-11 00:22:21,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2022-02-11 00:22:21,314 INFO L87 Difference]: Start difference. First operand 71 states and 154 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:22:21,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:22:21,474 INFO L93 Difference]: Finished difference Result 107 states and 215 transitions. [2022-02-11 00:22:21,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-11 00:22:21,474 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-02-11 00:22:21,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:22:21,475 INFO L225 Difference]: With dead ends: 107 [2022-02-11 00:22:21,475 INFO L226 Difference]: Without dead ends: 104 [2022-02-11 00:22:21,475 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2022-02-11 00:22:21,475 INFO L934 BasicCegarLoop]: 9 mSDtfsCounter, 43 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 198 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 209 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 198 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-11 00:22:21,476 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 69 Invalid, 209 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 198 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-11 00:22:21,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2022-02-11 00:22:21,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 71. [2022-02-11 00:22:21,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 70 states have (on average 2.1857142857142855) internal successors, (153), 70 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:22:21,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 153 transitions. [2022-02-11 00:22:21,477 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 153 transitions. Word has length 15 [2022-02-11 00:22:21,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:22:21,478 INFO L470 AbstractCegarLoop]: Abstraction has 71 states and 153 transitions. [2022-02-11 00:22:21,478 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:22:21,478 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 153 transitions. [2022-02-11 00:22:21,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-02-11 00:22:21,478 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:22:21,478 INFO L515 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:22:21,494 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-02-11 00:22:21,691 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,SelfDestructingSolverStorable21 [2022-02-11 00:22:21,691 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:22:21,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:22:21,692 INFO L85 PathProgramCache]: Analyzing trace with hash -711971345, now seen corresponding path program 14 times [2022-02-11 00:22:21,692 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:22:21,692 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2002615532] [2022-02-11 00:22:21,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:22:21,692 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:22:21,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:22:21,758 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:22:21,758 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:22:21,758 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2002615532] [2022-02-11 00:22:21,758 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2002615532] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:22:21,758 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1096499878] [2022-02-11 00:22:21,758 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-11 00:22:21,758 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:22:21,759 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:22:21,760 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) [2022-02-11 00:22:21,760 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-02-11 00:22:21,787 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-11 00:22:21,787 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:22:21,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 15 conjunts are in the unsatisfiable core [2022-02-11 00:22:21,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:22:21,901 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 96 treesize of output 80 [2022-02-11 00:22:21,909 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 80 treesize of output 64 [2022-02-11 00:22:21,984 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:22:21,985 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:22:22,079 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-11 00:22:22,080 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 65 treesize of output 56 [2022-02-11 00:22:22,083 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 34 [2022-02-11 00:22:22,129 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:22:22,129 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1096499878] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:22:22,129 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:22:22,129 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2022-02-11 00:22:22,129 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1662250142] [2022-02-11 00:22:22,129 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:22:22,130 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-02-11 00:22:22,130 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:22:22,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-02-11 00:22:22,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2022-02-11 00:22:22,131 INFO L87 Difference]: Start difference. First operand 71 states and 153 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:22:22,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:22:22,412 INFO L93 Difference]: Finished difference Result 116 states and 229 transitions. [2022-02-11 00:22:22,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-11 00:22:22,419 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-02-11 00:22:22,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:22:22,420 INFO L225 Difference]: With dead ends: 116 [2022-02-11 00:22:22,420 INFO L226 Difference]: Without dead ends: 116 [2022-02-11 00:22:22,420 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=124, Invalid=256, Unknown=0, NotChecked=0, Total=380 [2022-02-11 00:22:22,421 INFO L934 BasicCegarLoop]: 14 mSDtfsCounter, 46 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 170 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 170 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-11 00:22:22,421 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 61 Invalid, 178 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 170 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-11 00:22:22,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2022-02-11 00:22:22,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 71. [2022-02-11 00:22:22,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 70 states have (on average 2.1857142857142855) internal successors, (153), 70 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:22:22,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 153 transitions. [2022-02-11 00:22:22,423 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 153 transitions. Word has length 15 [2022-02-11 00:22:22,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:22:22,423 INFO L470 AbstractCegarLoop]: Abstraction has 71 states and 153 transitions. [2022-02-11 00:22:22,423 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:22:22,423 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 153 transitions. [2022-02-11 00:22:22,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-02-11 00:22:22,424 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:22:22,424 INFO L515 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:22:22,440 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-02-11 00:22:22,627 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:22:22,627 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:22:22,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:22:22,628 INFO L85 PathProgramCache]: Analyzing trace with hash -1496166981, now seen corresponding path program 15 times [2022-02-11 00:22:22,628 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:22:22,628 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1241363270] [2022-02-11 00:22:22,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:22:22,628 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:22:22,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:22:22,682 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:22:22,682 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:22:22,682 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1241363270] [2022-02-11 00:22:22,682 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1241363270] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:22:22,682 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1978914702] [2022-02-11 00:22:22,682 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-11 00:22:22,682 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:22:22,682 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:22:22,683 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) [2022-02-11 00:22:22,685 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-02-11 00:22:22,712 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-02-11 00:22:22,712 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:22:22,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 17 conjunts are in the unsatisfiable core [2022-02-11 00:22:22,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:22:22,888 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 51 [2022-02-11 00:22:22,891 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 39 [2022-02-11 00:22:22,913 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:22:22,913 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:22:23,020 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:22:23,020 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 65 treesize of output 61 [2022-02-11 00:22:23,028 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:22:23,028 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 53 treesize of output 49 [2022-02-11 00:22:23,133 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:22:23,133 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1978914702] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:22:23,133 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:22:23,133 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2022-02-11 00:22:23,133 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219229389] [2022-02-11 00:22:23,133 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:22:23,133 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-02-11 00:22:23,133 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:22:23,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-02-11 00:22:23,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2022-02-11 00:22:23,134 INFO L87 Difference]: Start difference. First operand 71 states and 153 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 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) [2022-02-11 00:22:23,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:22:23,384 INFO L93 Difference]: Finished difference Result 110 states and 218 transitions. [2022-02-11 00:22:23,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-11 00:22:23,384 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 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 15 [2022-02-11 00:22:23,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:22:23,385 INFO L225 Difference]: With dead ends: 110 [2022-02-11 00:22:23,385 INFO L226 Difference]: Without dead ends: 106 [2022-02-11 00:22:23,385 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=94, Invalid=248, Unknown=0, NotChecked=0, Total=342 [2022-02-11 00:22:23,385 INFO L934 BasicCegarLoop]: 14 mSDtfsCounter, 57 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 154 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 170 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 154 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-11 00:22:23,385 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 82 Invalid, 170 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 154 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-11 00:22:23,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2022-02-11 00:22:23,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 81. [2022-02-11 00:22:23,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 80 states have (on average 2.2125) internal successors, (177), 80 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:22:23,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 177 transitions. [2022-02-11 00:22:23,388 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 177 transitions. Word has length 15 [2022-02-11 00:22:23,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:22:23,388 INFO L470 AbstractCegarLoop]: Abstraction has 81 states and 177 transitions. [2022-02-11 00:22:23,388 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 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) [2022-02-11 00:22:23,388 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 177 transitions. [2022-02-11 00:22:23,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-02-11 00:22:23,388 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:22:23,388 INFO L515 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:22:23,405 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-02-11 00:22:23,603 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:22:23,603 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:22:23,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:22:23,604 INFO L85 PathProgramCache]: Analyzing trace with hash -153867149, now seen corresponding path program 16 times [2022-02-11 00:22:23,604 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:22:23,604 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1480685496] [2022-02-11 00:22:23,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:22:23,604 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:22:23,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:22:23,659 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:22:23,660 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:22:23,660 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1480685496] [2022-02-11 00:22:23,660 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1480685496] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:22:23,660 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [541686899] [2022-02-11 00:22:23,660 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-11 00:22:23,660 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:22:23,660 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:22:23,661 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) [2022-02-11 00:22:23,662 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-02-11 00:22:23,688 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-11 00:22:23,688 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:22:23,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 15 conjunts are in the unsatisfiable core [2022-02-11 00:22:23,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:22:23,786 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:22:23,787 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:22:23,912 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:22:23,912 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 34 treesize of output 34 [2022-02-11 00:22:23,918 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:22:23,918 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 26 treesize of output 26 [2022-02-11 00:22:23,950 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:22:23,950 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [541686899] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:22:23,950 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:22:23,950 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2022-02-11 00:22:23,950 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [925862942] [2022-02-11 00:22:23,950 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:22:23,950 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-02-11 00:22:23,950 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:22:23,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-02-11 00:22:23,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2022-02-11 00:22:23,951 INFO L87 Difference]: Start difference. First operand 81 states and 177 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:22:24,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:22:24,034 INFO L93 Difference]: Finished difference Result 93 states and 200 transitions. [2022-02-11 00:22:24,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-02-11 00:22:24,034 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-02-11 00:22:24,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:22:24,035 INFO L225 Difference]: With dead ends: 93 [2022-02-11 00:22:24,035 INFO L226 Difference]: Without dead ends: 93 [2022-02-11 00:22:24,035 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2022-02-11 00:22:24,035 INFO L934 BasicCegarLoop]: 7 mSDtfsCounter, 16 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 209 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 211 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 209 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-11 00:22:24,036 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 65 Invalid, 211 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 209 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-11 00:22:24,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2022-02-11 00:22:24,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 79. [2022-02-11 00:22:24,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 78 states have (on average 2.1923076923076925) internal successors, (171), 78 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:22:24,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 171 transitions. [2022-02-11 00:22:24,037 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 171 transitions. Word has length 15 [2022-02-11 00:22:24,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:22:24,037 INFO L470 AbstractCegarLoop]: Abstraction has 79 states and 171 transitions. [2022-02-11 00:22:24,038 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:22:24,038 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 171 transitions. [2022-02-11 00:22:24,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-02-11 00:22:24,038 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:22:24,038 INFO L515 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:22:24,055 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-02-11 00:22:24,253 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-02-11 00:22:24,253 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:22:24,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:22:24,254 INFO L85 PathProgramCache]: Analyzing trace with hash 632186871, now seen corresponding path program 17 times [2022-02-11 00:22:24,254 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:22:24,254 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [634113314] [2022-02-11 00:22:24,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:22:24,254 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:22:24,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:22:24,338 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:22:24,338 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:22:24,338 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [634113314] [2022-02-11 00:22:24,338 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [634113314] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:22:24,338 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1189634403] [2022-02-11 00:22:24,338 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-11 00:22:24,339 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:22:24,339 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:22:24,340 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) [2022-02-11 00:22:24,340 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-02-11 00:22:24,370 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-11 00:22:24,370 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:22:24,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 15 conjunts are in the unsatisfiable core [2022-02-11 00:22:24,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:22:24,527 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 98 treesize of output 82 [2022-02-11 00:22:24,529 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 82 treesize of output 66 [2022-02-11 00:22:24,600 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:22:24,601 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:22:24,681 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:22:24,682 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 65 treesize of output 61 [2022-02-11 00:22:24,688 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:22:24,688 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 53 treesize of output 49 [2022-02-11 00:22:24,788 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:22:24,788 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1189634403] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:22:24,789 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:22:24,789 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2022-02-11 00:22:24,789 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1828348927] [2022-02-11 00:22:24,789 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:22:24,789 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-02-11 00:22:24,789 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:22:24,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-02-11 00:22:24,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2022-02-11 00:22:24,789 INFO L87 Difference]: Start difference. First operand 79 states and 171 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:22:24,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:22:24,864 INFO L93 Difference]: Finished difference Result 80 states and 170 transitions. [2022-02-11 00:22:24,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-02-11 00:22:24,864 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-02-11 00:22:24,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:22:24,865 INFO L225 Difference]: With dead ends: 80 [2022-02-11 00:22:24,865 INFO L226 Difference]: Without dead ends: 80 [2022-02-11 00:22:24,865 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2022-02-11 00:22:24,865 INFO L934 BasicCegarLoop]: 6 mSDtfsCounter, 13 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 166 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 169 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 166 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-11 00:22:24,865 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 45 Invalid, 169 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 166 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-11 00:22:24,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2022-02-11 00:22:24,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 70. [2022-02-11 00:22:24,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 69 states have (on average 2.1449275362318843) internal successors, (148), 69 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:22:24,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 148 transitions. [2022-02-11 00:22:24,867 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 148 transitions. Word has length 15 [2022-02-11 00:22:24,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:22:24,867 INFO L470 AbstractCegarLoop]: Abstraction has 70 states and 148 transitions. [2022-02-11 00:22:24,867 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:22:24,867 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 148 transitions. [2022-02-11 00:22:24,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-02-11 00:22:24,868 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:22:24,868 INFO L515 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:22:24,884 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-02-11 00:22:25,071 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-02-11 00:22:25,072 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:22:25,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:22:25,072 INFO L85 PathProgramCache]: Analyzing trace with hash -1555996305, now seen corresponding path program 18 times [2022-02-11 00:22:25,072 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:22:25,072 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1745987504] [2022-02-11 00:22:25,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:22:25,072 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:22:25,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:22:25,142 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:22:25,143 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:22:25,143 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1745987504] [2022-02-11 00:22:25,143 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1745987504] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:22:25,143 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1122596200] [2022-02-11 00:22:25,143 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-11 00:22:25,143 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:22:25,143 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:22:25,144 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) [2022-02-11 00:22:25,146 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-02-11 00:22:25,174 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-02-11 00:22:25,175 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:22:25,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 15 conjunts are in the unsatisfiable core [2022-02-11 00:22:25,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:22:25,267 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 73 [2022-02-11 00:22:25,272 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 57 [2022-02-11 00:22:25,346 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:22:25,346 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:22:25,491 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:22:25,491 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 34 treesize of output 34 [2022-02-11 00:22:25,497 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:22:25,497 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 26 treesize of output 26 [2022-02-11 00:22:25,560 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:22:25,560 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1122596200] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:22:25,560 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:22:25,560 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2022-02-11 00:22:25,560 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [849274279] [2022-02-11 00:22:25,560 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:22:25,560 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-02-11 00:22:25,560 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:22:25,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-02-11 00:22:25,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2022-02-11 00:22:25,561 INFO L87 Difference]: Start difference. First operand 70 states and 148 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:22:25,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:22:25,749 INFO L93 Difference]: Finished difference Result 132 states and 257 transitions. [2022-02-11 00:22:25,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-11 00:22:25,750 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-02-11 00:22:25,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:22:25,750 INFO L225 Difference]: With dead ends: 132 [2022-02-11 00:22:25,750 INFO L226 Difference]: Without dead ends: 132 [2022-02-11 00:22:25,750 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=77, Invalid=229, Unknown=0, NotChecked=0, Total=306 [2022-02-11 00:22:25,751 INFO L934 BasicCegarLoop]: 15 mSDtfsCounter, 108 mSDsluCounter, 163 mSDsCounter, 0 mSdLazyCounter, 241 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 254 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 241 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-11 00:22:25,751 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [108 Valid, 101 Invalid, 254 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 241 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-11 00:22:25,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2022-02-11 00:22:25,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 76. [2022-02-11 00:22:25,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 75 states have (on average 2.2266666666666666) internal successors, (167), 75 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:22:25,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 167 transitions. [2022-02-11 00:22:25,753 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 167 transitions. Word has length 15 [2022-02-11 00:22:25,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:22:25,753 INFO L470 AbstractCegarLoop]: Abstraction has 76 states and 167 transitions. [2022-02-11 00:22:25,753 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:22:25,753 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 167 transitions. [2022-02-11 00:22:25,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-02-11 00:22:25,753 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:22:25,753 INFO L515 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:22:25,769 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-02-11 00:22:25,954 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-02-11 00:22:25,954 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:22:25,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:22:25,954 INFO L85 PathProgramCache]: Analyzing trace with hash 910805043, now seen corresponding path program 19 times [2022-02-11 00:22:25,954 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:22:25,954 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [711572873] [2022-02-11 00:22:25,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:22:25,955 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:22:25,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:22:26,014 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:22:26,015 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:22:26,015 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [711572873] [2022-02-11 00:22:26,015 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [711572873] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:22:26,015 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [549015550] [2022-02-11 00:22:26,015 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-11 00:22:26,015 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:22:26,015 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:22:26,020 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) [2022-02-11 00:22:26,021 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-02-11 00:22:26,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:22:26,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 15 conjunts are in the unsatisfiable core [2022-02-11 00:22:26,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:22:26,177 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 49 [2022-02-11 00:22:26,180 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 37 [2022-02-11 00:22:26,217 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:22:26,217 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:22:26,280 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:22:26,280 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 63 treesize of output 59 [2022-02-11 00:22:26,287 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:22:26,287 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 51 treesize of output 47 [2022-02-11 00:22:26,386 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:22:26,386 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [549015550] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:22:26,386 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:22:26,386 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2022-02-11 00:22:26,386 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1793695229] [2022-02-11 00:22:26,386 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:22:26,386 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-02-11 00:22:26,386 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:22:26,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-02-11 00:22:26,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2022-02-11 00:22:26,387 INFO L87 Difference]: Start difference. First operand 76 states and 167 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:22:26,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:22:26,500 INFO L93 Difference]: Finished difference Result 120 states and 240 transitions. [2022-02-11 00:22:26,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-11 00:22:26,500 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-02-11 00:22:26,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:22:26,501 INFO L225 Difference]: With dead ends: 120 [2022-02-11 00:22:26,501 INFO L226 Difference]: Without dead ends: 114 [2022-02-11 00:22:26,501 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2022-02-11 00:22:26,501 INFO L934 BasicCegarLoop]: 10 mSDtfsCounter, 63 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-11 00:22:26,502 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 60 Invalid, 132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 119 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-11 00:22:26,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2022-02-11 00:22:26,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 88. [2022-02-11 00:22:26,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 87 states have (on average 2.2528735632183907) internal successors, (196), 87 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:22:26,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 196 transitions. [2022-02-11 00:22:26,504 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 196 transitions. Word has length 15 [2022-02-11 00:22:26,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:22:26,504 INFO L470 AbstractCegarLoop]: Abstraction has 88 states and 196 transitions. [2022-02-11 00:22:26,504 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:22:26,504 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 196 transitions. [2022-02-11 00:22:26,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-02-11 00:22:26,504 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:22:26,504 INFO L515 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:22:26,524 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-02-11 00:22:26,704 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:22:26,705 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:22:26,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:22:26,705 INFO L85 PathProgramCache]: Analyzing trace with hash 590174455, now seen corresponding path program 20 times [2022-02-11 00:22:26,705 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:22:26,705 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [552672449] [2022-02-11 00:22:26,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:22:26,705 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:22:26,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:22:26,779 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:22:26,779 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:22:26,779 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [552672449] [2022-02-11 00:22:26,779 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [552672449] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:22:26,779 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [851392580] [2022-02-11 00:22:26,779 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-11 00:22:26,779 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:22:26,780 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:22:26,780 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) [2022-02-11 00:22:26,796 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-02-11 00:22:26,809 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-11 00:22:26,809 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:22:26,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 15 conjunts are in the unsatisfiable core [2022-02-11 00:22:26,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:22:26,903 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:22:26,903 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:22:27,016 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:22:27,016 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 34 treesize of output 34 [2022-02-11 00:22:27,021 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:22:27,022 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 26 treesize of output 26 [2022-02-11 00:22:27,069 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:22:27,069 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [851392580] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:22:27,069 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:22:27,069 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2022-02-11 00:22:27,069 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1752995108] [2022-02-11 00:22:27,069 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:22:27,070 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-02-11 00:22:27,070 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:22:27,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-02-11 00:22:27,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2022-02-11 00:22:27,070 INFO L87 Difference]: Start difference. First operand 88 states and 196 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:22:27,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:22:27,123 INFO L93 Difference]: Finished difference Result 102 states and 220 transitions. [2022-02-11 00:22:27,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-02-11 00:22:27,124 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-02-11 00:22:27,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:22:27,124 INFO L225 Difference]: With dead ends: 102 [2022-02-11 00:22:27,124 INFO L226 Difference]: Without dead ends: 102 [2022-02-11 00:22:27,124 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2022-02-11 00:22:27,125 INFO L934 BasicCegarLoop]: 7 mSDtfsCounter, 19 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 134 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-11 00:22:27,125 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 38 Invalid, 136 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 134 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-11 00:22:27,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2022-02-11 00:22:27,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 85. [2022-02-11 00:22:27,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 2.2023809523809526) internal successors, (185), 84 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:22:27,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 185 transitions. [2022-02-11 00:22:27,127 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 185 transitions. Word has length 15 [2022-02-11 00:22:27,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:22:27,127 INFO L470 AbstractCegarLoop]: Abstraction has 85 states and 185 transitions. [2022-02-11 00:22:27,127 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:22:27,127 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 185 transitions. [2022-02-11 00:22:27,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-02-11 00:22:27,127 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:22:27,128 INFO L515 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:22:27,148 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-02-11 00:22:27,343 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,SelfDestructingSolverStorable28 [2022-02-11 00:22:27,343 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:22:27,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:22:27,343 INFO L85 PathProgramCache]: Analyzing trace with hash 1536075755, now seen corresponding path program 21 times [2022-02-11 00:22:27,343 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:22:27,344 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1639786148] [2022-02-11 00:22:27,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:22:27,344 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:22:27,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:22:27,408 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:22:27,408 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:22:27,408 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1639786148] [2022-02-11 00:22:27,408 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1639786148] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:22:27,408 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [861987796] [2022-02-11 00:22:27,408 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-11 00:22:27,409 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:22:27,409 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:22:27,410 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) [2022-02-11 00:22:27,411 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-02-11 00:22:27,440 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-11 00:22:27,440 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:22:27,441 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 15 conjunts are in the unsatisfiable core [2022-02-11 00:22:27,441 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:22:27,537 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:22:27,537 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:22:27,680 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:22:27,680 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 34 treesize of output 34 [2022-02-11 00:22:27,686 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:22:27,686 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 26 treesize of output 26 [2022-02-11 00:22:27,736 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:22:27,737 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [861987796] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:22:27,737 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:22:27,737 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2022-02-11 00:22:27,737 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1453005108] [2022-02-11 00:22:27,737 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:22:27,737 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-02-11 00:22:27,737 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:22:27,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-02-11 00:22:27,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2022-02-11 00:22:27,737 INFO L87 Difference]: Start difference. First operand 85 states and 185 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:22:27,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:22:27,796 INFO L93 Difference]: Finished difference Result 98 states and 209 transitions. [2022-02-11 00:22:27,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-02-11 00:22:27,797 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-02-11 00:22:27,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:22:27,797 INFO L225 Difference]: With dead ends: 98 [2022-02-11 00:22:27,797 INFO L226 Difference]: Without dead ends: 98 [2022-02-11 00:22:27,797 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2022-02-11 00:22:27,798 INFO L934 BasicCegarLoop]: 7 mSDtfsCounter, 16 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 153 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 153 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-11 00:22:27,798 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 45 Invalid, 155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 153 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-11 00:22:27,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2022-02-11 00:22:27,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 84. [2022-02-11 00:22:27,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 83 states have (on average 2.1927710843373496) internal successors, (182), 83 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:22:27,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 182 transitions. [2022-02-11 00:22:27,800 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 182 transitions. Word has length 15 [2022-02-11 00:22:27,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:22:27,800 INFO L470 AbstractCegarLoop]: Abstraction has 84 states and 182 transitions. [2022-02-11 00:22:27,800 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:22:27,800 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 182 transitions. [2022-02-11 00:22:27,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-02-11 00:22:27,801 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:22:27,801 INFO L515 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:22:27,817 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-02-11 00:22:28,014 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:22:28,014 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:22:28,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:22:28,014 INFO L85 PathProgramCache]: Analyzing trace with hash -1972837521, now seen corresponding path program 22 times [2022-02-11 00:22:28,015 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:22:28,015 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [577970926] [2022-02-11 00:22:28,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:22:28,015 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:22:28,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:22:28,071 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:22:28,071 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:22:28,071 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [577970926] [2022-02-11 00:22:28,071 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [577970926] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:22:28,071 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [68782719] [2022-02-11 00:22:28,071 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-11 00:22:28,071 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:22:28,071 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:22:28,073 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) [2022-02-11 00:22:28,074 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-02-11 00:22:28,109 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-11 00:22:28,110 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:22:28,110 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 15 conjunts are in the unsatisfiable core [2022-02-11 00:22:28,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:22:28,199 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 98 treesize of output 82 [2022-02-11 00:22:28,202 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 82 treesize of output 66 [2022-02-11 00:22:28,262 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:22:28,262 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:22:28,342 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:22:28,342 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 65 treesize of output 61 [2022-02-11 00:22:28,349 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:22:28,349 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 53 treesize of output 49 [2022-02-11 00:22:28,430 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:22:28,430 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [68782719] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:22:28,430 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:22:28,430 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2022-02-11 00:22:28,430 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1235754401] [2022-02-11 00:22:28,430 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:22:28,430 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-02-11 00:22:28,430 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:22:28,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-02-11 00:22:28,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2022-02-11 00:22:28,431 INFO L87 Difference]: Start difference. First operand 84 states and 182 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:22:28,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:22:28,488 INFO L93 Difference]: Finished difference Result 91 states and 195 transitions. [2022-02-11 00:22:28,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-02-11 00:22:28,489 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-02-11 00:22:28,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:22:28,489 INFO L225 Difference]: With dead ends: 91 [2022-02-11 00:22:28,489 INFO L226 Difference]: Without dead ends: 91 [2022-02-11 00:22:28,489 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2022-02-11 00:22:28,490 INFO L934 BasicCegarLoop]: 6 mSDtfsCounter, 20 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 148 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-11 00:22:28,490 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 39 Invalid, 152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 148 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-11 00:22:28,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2022-02-11 00:22:28,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 81. [2022-02-11 00:22:28,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 80 states have (on average 2.175) internal successors, (174), 80 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:22:28,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 174 transitions. [2022-02-11 00:22:28,492 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 174 transitions. Word has length 15 [2022-02-11 00:22:28,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:22:28,492 INFO L470 AbstractCegarLoop]: Abstraction has 81 states and 174 transitions. [2022-02-11 00:22:28,492 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:22:28,492 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 174 transitions. [2022-02-11 00:22:28,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-02-11 00:22:28,492 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:22:28,492 INFO L515 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:22:28,509 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-02-11 00:22:28,708 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:22:28,709 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:22:28,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:22:28,709 INFO L85 PathProgramCache]: Analyzing trace with hash 133946599, now seen corresponding path program 23 times [2022-02-11 00:22:28,709 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:22:28,709 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [140925605] [2022-02-11 00:22:28,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:22:28,709 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:22:28,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:22:28,771 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:22:28,771 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:22:28,772 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [140925605] [2022-02-11 00:22:28,772 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [140925605] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:22:28,772 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [330650429] [2022-02-11 00:22:28,772 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-11 00:22:28,772 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:22:28,772 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:22:28,773 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) [2022-02-11 00:22:28,774 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-02-11 00:22:28,802 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-11 00:22:28,802 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:22:28,803 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 15 conjunts are in the unsatisfiable core [2022-02-11 00:22:28,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:22:28,898 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 87 treesize of output 71 [2022-02-11 00:22:28,900 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 55 [2022-02-11 00:22:28,976 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:22:28,976 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:22:29,069 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:22:29,069 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 33 treesize of output 33 [2022-02-11 00:22:29,073 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:22:29,074 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 25 treesize of output 25 [2022-02-11 00:22:29,111 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:22:29,111 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [330650429] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:22:29,111 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:22:29,111 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2022-02-11 00:22:29,112 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1270187727] [2022-02-11 00:22:29,112 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:22:29,112 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-02-11 00:22:29,112 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:22:29,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-02-11 00:22:29,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2022-02-11 00:22:29,113 INFO L87 Difference]: Start difference. First operand 81 states and 174 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:22:29,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:22:29,302 INFO L93 Difference]: Finished difference Result 138 states and 270 transitions. [2022-02-11 00:22:29,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-11 00:22:29,302 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-02-11 00:22:29,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:22:29,303 INFO L225 Difference]: With dead ends: 138 [2022-02-11 00:22:29,303 INFO L226 Difference]: Without dead ends: 138 [2022-02-11 00:22:29,303 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2022-02-11 00:22:29,303 INFO L934 BasicCegarLoop]: 16 mSDtfsCounter, 86 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 289 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 298 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 289 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-11 00:22:29,303 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [86 Valid, 116 Invalid, 298 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 289 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-11 00:22:29,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2022-02-11 00:22:29,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 84. [2022-02-11 00:22:29,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 83 states have (on average 2.2289156626506026) internal successors, (185), 83 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:22:29,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 185 transitions. [2022-02-11 00:22:29,306 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 185 transitions. Word has length 15 [2022-02-11 00:22:29,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:22:29,306 INFO L470 AbstractCegarLoop]: Abstraction has 84 states and 185 transitions. [2022-02-11 00:22:29,306 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:22:29,306 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 185 transitions. [2022-02-11 00:22:29,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-02-11 00:22:29,306 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:22:29,306 INFO L515 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:22:29,325 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-02-11 00:22:29,521 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:22:29,521 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:22:29,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:22:29,522 INFO L85 PathProgramCache]: Analyzing trace with hash -1694219349, now seen corresponding path program 24 times [2022-02-11 00:22:29,522 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:22:29,522 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [564887346] [2022-02-11 00:22:29,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:22:29,522 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:22:29,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:22:29,574 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:22:29,574 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:22:29,574 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [564887346] [2022-02-11 00:22:29,574 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [564887346] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:22:29,574 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1307595933] [2022-02-11 00:22:29,574 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-11 00:22:29,574 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:22:29,575 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:22:29,576 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) [2022-02-11 00:22:29,576 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-02-11 00:22:29,603 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-02-11 00:22:29,603 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:22:29,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 15 conjunts are in the unsatisfiable core [2022-02-11 00:22:29,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:22:29,731 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 49 [2022-02-11 00:22:29,733 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 37 [2022-02-11 00:22:29,759 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:22:29,760 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:22:29,824 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:22:29,824 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 63 treesize of output 59 [2022-02-11 00:22:29,841 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:22:29,842 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 51 treesize of output 47 [2022-02-11 00:22:29,954 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:22:29,954 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1307595933] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:22:29,954 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:22:29,955 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2022-02-11 00:22:29,955 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1012918116] [2022-02-11 00:22:29,955 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:22:29,955 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-02-11 00:22:29,955 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:22:29,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-02-11 00:22:29,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2022-02-11 00:22:29,955 INFO L87 Difference]: Start difference. First operand 84 states and 185 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:22:30,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:22:30,106 INFO L93 Difference]: Finished difference Result 125 states and 249 transitions. [2022-02-11 00:22:30,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-11 00:22:30,106 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-02-11 00:22:30,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:22:30,107 INFO L225 Difference]: With dead ends: 125 [2022-02-11 00:22:30,107 INFO L226 Difference]: Without dead ends: 119 [2022-02-11 00:22:30,107 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=62, Invalid=120, Unknown=0, NotChecked=0, Total=182 [2022-02-11 00:22:30,107 INFO L934 BasicCegarLoop]: 11 mSDtfsCounter, 61 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 144 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 156 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 144 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-11 00:22:30,108 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 66 Invalid, 156 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 144 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-11 00:22:30,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2022-02-11 00:22:30,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 82. [2022-02-11 00:22:30,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 81 states have (on average 2.197530864197531) internal successors, (178), 81 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:22:30,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 178 transitions. [2022-02-11 00:22:30,109 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 178 transitions. Word has length 15 [2022-02-11 00:22:30,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:22:30,110 INFO L470 AbstractCegarLoop]: Abstraction has 82 states and 178 transitions. [2022-02-11 00:22:30,110 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:22:30,110 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 178 transitions. [2022-02-11 00:22:30,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-02-11 00:22:30,111 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:22:30,111 INFO L515 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:22:30,127 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-02-11 00:22:30,327 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:22:30,327 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:22:30,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:22:30,327 INFO L85 PathProgramCache]: Analyzing trace with hash -2014849937, now seen corresponding path program 25 times [2022-02-11 00:22:30,327 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:22:30,327 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [427867292] [2022-02-11 00:22:30,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:22:30,328 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:22:30,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:22:30,395 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:22:30,395 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:22:30,396 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [427867292] [2022-02-11 00:22:30,396 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [427867292] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:22:30,396 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2027865735] [2022-02-11 00:22:30,396 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-11 00:22:30,396 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:22:30,396 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:22:30,397 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) [2022-02-11 00:22:30,398 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-02-11 00:22:30,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:22:30,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 15 conjunts are in the unsatisfiable core [2022-02-11 00:22:30,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:22:30,516 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:22:30,516 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:22:30,658 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:22:30,659 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 34 treesize of output 34 [2022-02-11 00:22:30,666 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:22:30,667 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 26 treesize of output 26 [2022-02-11 00:22:30,702 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:22:30,702 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2027865735] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:22:30,702 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:22:30,702 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2022-02-11 00:22:30,702 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965352080] [2022-02-11 00:22:30,702 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:22:30,703 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-02-11 00:22:30,703 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:22:30,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-02-11 00:22:30,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2022-02-11 00:22:30,703 INFO L87 Difference]: Start difference. First operand 82 states and 178 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:22:30,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:22:30,783 INFO L93 Difference]: Finished difference Result 94 states and 197 transitions. [2022-02-11 00:22:30,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-02-11 00:22:30,783 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-02-11 00:22:30,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:22:30,783 INFO L225 Difference]: With dead ends: 94 [2022-02-11 00:22:30,783 INFO L226 Difference]: Without dead ends: 94 [2022-02-11 00:22:30,784 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2022-02-11 00:22:30,784 INFO L934 BasicCegarLoop]: 7 mSDtfsCounter, 12 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 209 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 211 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 209 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-11 00:22:30,784 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 58 Invalid, 211 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 209 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-11 00:22:30,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2022-02-11 00:22:30,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 76. [2022-02-11 00:22:30,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 75 states have (on average 2.1333333333333333) internal successors, (160), 75 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:22:30,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 160 transitions. [2022-02-11 00:22:30,786 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 160 transitions. Word has length 15 [2022-02-11 00:22:30,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:22:30,786 INFO L470 AbstractCegarLoop]: Abstraction has 76 states and 160 transitions. [2022-02-11 00:22:30,786 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:22:30,786 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 160 transitions. [2022-02-11 00:22:30,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-02-11 00:22:30,786 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:22:30,786 INFO L515 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:22:30,803 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-02-11 00:22:31,002 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,SelfDestructingSolverStorable33 [2022-02-11 00:22:31,003 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:22:31,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:22:31,003 INFO L85 PathProgramCache]: Analyzing trace with hash 576845739, now seen corresponding path program 26 times [2022-02-11 00:22:31,003 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:22:31,003 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1302524441] [2022-02-11 00:22:31,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:22:31,003 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:22:31,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:22:31,058 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:22:31,058 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:22:31,058 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1302524441] [2022-02-11 00:22:31,058 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1302524441] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:22:31,058 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1742685432] [2022-02-11 00:22:31,058 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-11 00:22:31,058 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:22:31,058 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:22:31,059 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) [2022-02-11 00:22:31,060 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-02-11 00:22:31,089 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-11 00:22:31,089 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:22:31,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 15 conjunts are in the unsatisfiable core [2022-02-11 00:22:31,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:22:31,191 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 73 [2022-02-11 00:22:31,198 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 57 [2022-02-11 00:22:31,285 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:22:31,285 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:22:31,384 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-11 00:22:31,384 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 30 treesize of output 25 [2022-02-11 00:22:31,389 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:22:31,389 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1742685432] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:22:31,389 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:22:31,389 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2022-02-11 00:22:31,389 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2055775504] [2022-02-11 00:22:31,389 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:22:31,389 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-02-11 00:22:31,389 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:22:31,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-02-11 00:22:31,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2022-02-11 00:22:31,390 INFO L87 Difference]: Start difference. First operand 76 states and 160 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:22:31,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:22:31,663 INFO L93 Difference]: Finished difference Result 149 states and 280 transitions. [2022-02-11 00:22:31,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-11 00:22:31,663 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-02-11 00:22:31,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:22:31,671 INFO L225 Difference]: With dead ends: 149 [2022-02-11 00:22:31,671 INFO L226 Difference]: Without dead ends: 149 [2022-02-11 00:22:31,671 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=101, Invalid=279, Unknown=0, NotChecked=0, Total=380 [2022-02-11 00:22:31,672 INFO L934 BasicCegarLoop]: 17 mSDtfsCounter, 97 mSDsluCounter, 191 mSDsCounter, 0 mSdLazyCounter, 290 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 300 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 290 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-11 00:22:31,672 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [97 Valid, 115 Invalid, 300 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 290 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-11 00:22:31,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2022-02-11 00:22:31,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 77. [2022-02-11 00:22:31,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 76 states have (on average 2.1447368421052633) internal successors, (163), 76 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:22:31,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 163 transitions. [2022-02-11 00:22:31,674 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 163 transitions. Word has length 15 [2022-02-11 00:22:31,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:22:31,674 INFO L470 AbstractCegarLoop]: Abstraction has 77 states and 163 transitions. [2022-02-11 00:22:31,674 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:22:31,674 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 163 transitions. [2022-02-11 00:22:31,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-02-11 00:22:31,675 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:22:31,675 INFO L515 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:22:31,692 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-02-11 00:22:31,891 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2022-02-11 00:22:31,892 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:22:31,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:22:31,892 INFO L85 PathProgramCache]: Analyzing trace with hash -1251320209, now seen corresponding path program 27 times [2022-02-11 00:22:31,892 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:22:31,892 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [26198095] [2022-02-11 00:22:31,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:22:31,892 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:22:31,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:22:31,948 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:22:31,948 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:22:31,948 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [26198095] [2022-02-11 00:22:31,948 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [26198095] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:22:31,948 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1516879634] [2022-02-11 00:22:31,948 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-11 00:22:31,949 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:22:31,949 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:22:31,950 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) [2022-02-11 00:22:31,951 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-02-11 00:22:31,981 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-02-11 00:22:31,981 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:22:31,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 15 conjunts are in the unsatisfiable core [2022-02-11 00:22:31,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:22:32,130 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 49 [2022-02-11 00:22:32,132 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 37 [2022-02-11 00:22:32,164 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:22:32,164 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:22:32,241 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-11 00:22:32,242 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 65 treesize of output 56 [2022-02-11 00:22:32,245 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 32 [2022-02-11 00:22:32,270 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:22:32,270 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1516879634] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:22:32,270 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:22:32,270 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2022-02-11 00:22:32,270 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1158951562] [2022-02-11 00:22:32,270 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:22:32,270 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-02-11 00:22:32,271 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:22:32,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-02-11 00:22:32,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2022-02-11 00:22:32,271 INFO L87 Difference]: Start difference. First operand 77 states and 163 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:22:32,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:22:32,539 INFO L93 Difference]: Finished difference Result 126 states and 242 transitions. [2022-02-11 00:22:32,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-11 00:22:32,539 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-02-11 00:22:32,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:22:32,540 INFO L225 Difference]: With dead ends: 126 [2022-02-11 00:22:32,540 INFO L226 Difference]: Without dead ends: 120 [2022-02-11 00:22:32,540 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=108, Invalid=198, Unknown=0, NotChecked=0, Total=306 [2022-02-11 00:22:32,540 INFO L934 BasicCegarLoop]: 12 mSDtfsCounter, 73 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 151 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 157 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-11 00:22:32,540 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [73 Valid, 60 Invalid, 157 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 151 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-11 00:22:32,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2022-02-11 00:22:32,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 77. [2022-02-11 00:22:32,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 76 states have (on average 2.1315789473684212) internal successors, (162), 76 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:22:32,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 162 transitions. [2022-02-11 00:22:32,542 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 162 transitions. Word has length 15 [2022-02-11 00:22:32,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:22:32,542 INFO L470 AbstractCegarLoop]: Abstraction has 77 states and 162 transitions. [2022-02-11 00:22:32,542 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:22:32,542 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 162 transitions. [2022-02-11 00:22:32,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-02-11 00:22:32,543 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:22:32,543 INFO L515 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:22:32,559 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2022-02-11 00:22:32,743 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2022-02-11 00:22:32,743 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:22:32,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:22:32,744 INFO L85 PathProgramCache]: Analyzing trace with hash -1587411593, now seen corresponding path program 28 times [2022-02-11 00:22:32,744 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:22:32,744 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1450641397] [2022-02-11 00:22:32,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:22:32,744 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:22:32,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:22:32,800 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:22:32,800 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:22:32,800 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1450641397] [2022-02-11 00:22:32,800 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1450641397] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:22:32,800 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1582387470] [2022-02-11 00:22:32,800 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-11 00:22:32,800 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:22:32,801 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:22:32,801 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) [2022-02-11 00:22:32,802 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-02-11 00:22:32,831 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-11 00:22:32,831 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:22:32,831 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 15 conjunts are in the unsatisfiable core [2022-02-11 00:22:32,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:22:32,941 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:22:32,941 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:22:33,052 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-11 00:22:33,053 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 30 treesize of output 25 [2022-02-11 00:22:33,058 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:22:33,058 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1582387470] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:22:33,058 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:22:33,058 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2022-02-11 00:22:33,058 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1874191075] [2022-02-11 00:22:33,058 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:22:33,058 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-02-11 00:22:33,058 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:22:33,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-02-11 00:22:33,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2022-02-11 00:22:33,059 INFO L87 Difference]: Start difference. First operand 77 states and 162 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:22:33,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:22:33,196 INFO L93 Difference]: Finished difference Result 121 states and 242 transitions. [2022-02-11 00:22:33,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-11 00:22:33,196 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-02-11 00:22:33,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:22:33,197 INFO L225 Difference]: With dead ends: 121 [2022-02-11 00:22:33,197 INFO L226 Difference]: Without dead ends: 121 [2022-02-11 00:22:33,197 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2022-02-11 00:22:33,197 INFO L934 BasicCegarLoop]: 9 mSDtfsCounter, 52 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 203 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 211 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 203 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-11 00:22:33,197 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 60 Invalid, 211 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 203 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-11 00:22:33,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2022-02-11 00:22:33,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 77. [2022-02-11 00:22:33,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 76 states have (on average 2.1315789473684212) internal successors, (162), 76 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:22:33,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 162 transitions. [2022-02-11 00:22:33,199 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 162 transitions. Word has length 15 [2022-02-11 00:22:33,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:22:33,199 INFO L470 AbstractCegarLoop]: Abstraction has 77 states and 162 transitions. [2022-02-11 00:22:33,199 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:22:33,199 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 162 transitions. [2022-02-11 00:22:33,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-02-11 00:22:33,200 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:22:33,200 INFO L515 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:22:33,216 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-02-11 00:22:33,400 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:22:33,400 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:22:33,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:22:33,401 INFO L85 PathProgramCache]: Analyzing trace with hash -744973943, now seen corresponding path program 29 times [2022-02-11 00:22:33,401 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:22:33,401 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [591805012] [2022-02-11 00:22:33,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:22:33,401 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:22:33,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:22:33,464 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:22:33,464 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:22:33,464 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [591805012] [2022-02-11 00:22:33,465 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [591805012] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:22:33,465 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1693090340] [2022-02-11 00:22:33,465 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-11 00:22:33,465 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:22:33,465 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:22:33,492 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) [2022-02-11 00:22:33,493 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-02-11 00:22:33,523 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-11 00:22:33,523 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:22:33,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 15 conjunts are in the unsatisfiable core [2022-02-11 00:22:33,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:22:33,647 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 67 treesize of output 55 [2022-02-11 00:22:33,649 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 43 [2022-02-11 00:22:33,671 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:22:33,671 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:22:33,747 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-11 00:22:33,747 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 67 treesize of output 58 [2022-02-11 00:22:33,753 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 32 [2022-02-11 00:22:33,779 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:22:33,780 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1693090340] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:22:33,780 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:22:33,780 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 10 [2022-02-11 00:22:33,780 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1357891239] [2022-02-11 00:22:33,780 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:22:33,781 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-02-11 00:22:33,781 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:22:33,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-02-11 00:22:33,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-02-11 00:22:33,781 INFO L87 Difference]: Start difference. First operand 77 states and 162 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:22:33,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:22:33,907 INFO L93 Difference]: Finished difference Result 105 states and 207 transitions. [2022-02-11 00:22:33,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-02-11 00:22:33,908 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-02-11 00:22:33,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:22:33,908 INFO L225 Difference]: With dead ends: 105 [2022-02-11 00:22:33,908 INFO L226 Difference]: Without dead ends: 94 [2022-02-11 00:22:33,908 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2022-02-11 00:22:33,908 INFO L934 BasicCegarLoop]: 11 mSDtfsCounter, 48 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-11 00:22:33,909 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 37 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-11 00:22:33,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2022-02-11 00:22:33,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 72. [2022-02-11 00:22:33,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 71 states have (on average 2.140845070422535) internal successors, (152), 71 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:22:33,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 152 transitions. [2022-02-11 00:22:33,910 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 152 transitions. Word has length 15 [2022-02-11 00:22:33,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:22:33,910 INFO L470 AbstractCegarLoop]: Abstraction has 72 states and 152 transitions. [2022-02-11 00:22:33,910 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:22:33,910 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 152 transitions. [2022-02-11 00:22:33,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-02-11 00:22:33,911 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:22:33,911 INFO L515 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:22:33,937 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2022-02-11 00:22:34,111 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2022-02-11 00:22:34,111 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:22:34,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:22:34,112 INFO L85 PathProgramCache]: Analyzing trace with hash 1613464115, now seen corresponding path program 30 times [2022-02-11 00:22:34,112 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:22:34,112 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [636928824] [2022-02-11 00:22:34,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:22:34,112 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:22:34,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:22:34,179 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:22:34,179 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:22:34,180 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [636928824] [2022-02-11 00:22:34,180 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [636928824] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:22:34,180 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1767545542] [2022-02-11 00:22:34,180 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-11 00:22:34,180 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:22:34,180 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:22:34,181 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) [2022-02-11 00:22:34,183 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-02-11 00:22:34,213 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-11 00:22:34,213 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:22:34,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 15 conjunts are in the unsatisfiable core [2022-02-11 00:22:34,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:22:34,308 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:22:34,308 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:22:34,440 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-11 00:22:34,441 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 30 treesize of output 25 [2022-02-11 00:22:34,446 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:22:34,447 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1767545542] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:22:34,447 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:22:34,447 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2022-02-11 00:22:34,447 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1610578676] [2022-02-11 00:22:34,447 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:22:34,447 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-02-11 00:22:34,447 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:22:34,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-02-11 00:22:34,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2022-02-11 00:22:34,457 INFO L87 Difference]: Start difference. First operand 72 states and 152 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:22:34,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:22:34,554 INFO L93 Difference]: Finished difference Result 108 states and 215 transitions. [2022-02-11 00:22:34,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-02-11 00:22:34,554 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-02-11 00:22:34,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:22:34,555 INFO L225 Difference]: With dead ends: 108 [2022-02-11 00:22:34,555 INFO L226 Difference]: Without dead ends: 108 [2022-02-11 00:22:34,555 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2022-02-11 00:22:34,555 INFO L934 BasicCegarLoop]: 12 mSDtfsCounter, 51 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 185 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 186 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 185 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-11 00:22:34,555 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 64 Invalid, 186 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 185 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-11 00:22:34,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2022-02-11 00:22:34,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 70. [2022-02-11 00:22:34,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 69 states have (on average 2.101449275362319) internal successors, (145), 69 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:22:34,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 145 transitions. [2022-02-11 00:22:34,557 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 145 transitions. Word has length 15 [2022-02-11 00:22:34,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:22:34,557 INFO L470 AbstractCegarLoop]: Abstraction has 70 states and 145 transitions. [2022-02-11 00:22:34,557 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:22:34,557 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 145 transitions. [2022-02-11 00:22:34,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-02-11 00:22:34,557 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:22:34,558 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:22:34,574 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2022-02-11 00:22:34,774 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,SelfDestructingSolverStorable38 [2022-02-11 00:22:34,774 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:22:34,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:22:34,775 INFO L85 PathProgramCache]: Analyzing trace with hash -755081789, now seen corresponding path program 31 times [2022-02-11 00:22:34,775 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:22:34,775 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [550230253] [2022-02-11 00:22:34,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:22:34,775 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:22:34,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:22:35,030 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:22:35,030 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:22:35,030 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [550230253] [2022-02-11 00:22:35,030 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [550230253] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:22:35,030 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [446352696] [2022-02-11 00:22:35,031 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-11 00:22:35,031 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:22:35,031 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:22:35,044 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) [2022-02-11 00:22:35,049 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-02-11 00:22:35,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:22:35,082 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-11 00:22:35,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:22:35,424 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 59 [2022-02-11 00:22:35,426 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 47 [2022-02-11 00:22:35,526 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:22:35,526 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:22:35,864 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-11 00:22:35,865 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 120 treesize of output 103 [2022-02-11 00:22:35,869 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 100 treesize of output 80 [2022-02-11 00:22:35,946 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:22:35,947 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [446352696] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:22:35,947 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:22:35,947 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-02-11 00:22:35,947 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1615585643] [2022-02-11 00:22:35,947 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:22:35,947 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-11 00:22:35,947 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:22:35,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-11 00:22:35,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=396, Unknown=0, NotChecked=0, Total=462 [2022-02-11 00:22:35,948 INFO L87 Difference]: Start difference. First operand 70 states and 145 transitions. Second operand has 22 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:22:37,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:22:37,074 INFO L93 Difference]: Finished difference Result 169 states and 334 transitions. [2022-02-11 00:22:37,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-02-11 00:22:37,074 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-02-11 00:22:37,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:22:37,075 INFO L225 Difference]: With dead ends: 169 [2022-02-11 00:22:37,075 INFO L226 Difference]: Without dead ends: 154 [2022-02-11 00:22:37,076 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 269 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=264, Invalid=1218, Unknown=0, NotChecked=0, Total=1482 [2022-02-11 00:22:37,076 INFO L934 BasicCegarLoop]: 16 mSDtfsCounter, 148 mSDsluCounter, 413 mSDsCounter, 0 mSdLazyCounter, 699 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 206 SdHoareTripleChecker+Invalid, 751 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 699 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-11 00:22:37,076 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [148 Valid, 206 Invalid, 751 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 699 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-11 00:22:37,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2022-02-11 00:22:37,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 73. [2022-02-11 00:22:37,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 2.111111111111111) internal successors, (152), 72 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:22:37,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 152 transitions. [2022-02-11 00:22:37,078 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 152 transitions. Word has length 16 [2022-02-11 00:22:37,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:22:37,078 INFO L470 AbstractCegarLoop]: Abstraction has 73 states and 152 transitions. [2022-02-11 00:22:37,079 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:22:37,079 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 152 transitions. [2022-02-11 00:22:37,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-02-11 00:22:37,079 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:22:37,079 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:22:37,096 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2022-02-11 00:22:37,295 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2022-02-11 00:22:37,296 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:22:37,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:22:37,296 INFO L85 PathProgramCache]: Analyzing trace with hash 1594185491, now seen corresponding path program 32 times [2022-02-11 00:22:37,296 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:22:37,296 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [351554105] [2022-02-11 00:22:37,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:22:37,296 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:22:37,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:22:37,543 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:22:37,543 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:22:37,543 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [351554105] [2022-02-11 00:22:37,543 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [351554105] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:22:37,543 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1518525034] [2022-02-11 00:22:37,543 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-11 00:22:37,544 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:22:37,544 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:22:37,545 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) [2022-02-11 00:22:37,545 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-02-11 00:22:37,577 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-11 00:22:37,577 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:22:37,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-11 00:22:37,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:22:37,845 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 93 treesize of output 77 [2022-02-11 00:22:37,847 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 77 treesize of output 61 [2022-02-11 00:22:38,033 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:22:38,033 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:22:38,363 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-02-11 00:22:38,363 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 147 treesize of output 120 [2022-02-11 00:22:38,368 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 115 treesize of output 83 [2022-02-11 00:22:38,466 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:22:38,467 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1518525034] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:22:38,467 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:22:38,467 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 24 [2022-02-11 00:22:38,467 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494297974] [2022-02-11 00:22:38,467 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:22:38,467 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-02-11 00:22:38,467 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:22:38,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-02-11 00:22:38,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=487, Unknown=0, NotChecked=0, Total=552 [2022-02-11 00:22:38,468 INFO L87 Difference]: Start difference. First operand 73 states and 152 transitions. Second operand has 24 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 24 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) [2022-02-11 00:22:39,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:22:39,186 INFO L93 Difference]: Finished difference Result 136 states and 254 transitions. [2022-02-11 00:22:39,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-02-11 00:22:39,191 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 24 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 16 [2022-02-11 00:22:39,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:22:39,192 INFO L225 Difference]: With dead ends: 136 [2022-02-11 00:22:39,192 INFO L226 Difference]: Without dead ends: 122 [2022-02-11 00:22:39,192 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=169, Invalid=1091, Unknown=0, NotChecked=0, Total=1260 [2022-02-11 00:22:39,192 INFO L934 BasicCegarLoop]: 16 mSDtfsCounter, 117 mSDsluCounter, 400 mSDsCounter, 0 mSdLazyCounter, 681 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 236 SdHoareTripleChecker+Invalid, 717 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 681 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-11 00:22:39,193 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [117 Valid, 236 Invalid, 717 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 681 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-11 00:22:39,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2022-02-11 00:22:39,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 77. [2022-02-11 00:22:39,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 76 states have (on average 2.1184210526315788) internal successors, (161), 76 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:22:39,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 161 transitions. [2022-02-11 00:22:39,194 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 161 transitions. Word has length 16 [2022-02-11 00:22:39,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:22:39,194 INFO L470 AbstractCegarLoop]: Abstraction has 77 states and 161 transitions. [2022-02-11 00:22:39,194 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 24 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) [2022-02-11 00:22:39,195 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 161 transitions. [2022-02-11 00:22:39,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-02-11 00:22:39,195 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:22:39,195 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:22:39,211 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2022-02-11 00:22:39,403 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:22:39,403 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:22:39,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:22:39,404 INFO L85 PathProgramCache]: Analyzing trace with hash 1627784719, now seen corresponding path program 33 times [2022-02-11 00:22:39,404 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:22:39,404 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1718517778] [2022-02-11 00:22:39,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:22:39,404 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:22:39,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:22:39,628 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:22:39,629 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:22:39,629 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1718517778] [2022-02-11 00:22:39,629 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1718517778] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:22:39,629 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [87704724] [2022-02-11 00:22:39,629 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-11 00:22:39,629 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:22:39,629 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:22:39,630 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) [2022-02-11 00:22:39,630 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-02-11 00:22:39,660 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-02-11 00:22:39,661 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:22:39,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-11 00:22:39,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:22:39,940 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 93 treesize of output 77 [2022-02-11 00:22:39,946 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 77 treesize of output 61 [2022-02-11 00:22:40,141 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:22:40,142 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:22:40,504 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-02-11 00:22:40,505 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 144 treesize of output 117 [2022-02-11 00:22:40,508 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 112 treesize of output 80 [2022-02-11 00:22:40,592 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:22:40,593 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [87704724] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:22:40,593 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:22:40,593 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2022-02-11 00:22:40,593 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1265730462] [2022-02-11 00:22:40,593 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:22:40,593 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-02-11 00:22:40,593 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:22:40,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-02-11 00:22:40,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2022-02-11 00:22:40,594 INFO L87 Difference]: Start difference. First operand 77 states and 161 transitions. Second operand has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 23 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) [2022-02-11 00:22:42,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:22:42,259 INFO L93 Difference]: Finished difference Result 223 states and 387 transitions. [2022-02-11 00:22:42,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-02-11 00:22:42,260 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 23 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 16 [2022-02-11 00:22:42,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:22:42,260 INFO L225 Difference]: With dead ends: 223 [2022-02-11 00:22:42,260 INFO L226 Difference]: Without dead ends: 178 [2022-02-11 00:22:42,261 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 386 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=354, Invalid=1626, Unknown=0, NotChecked=0, Total=1980 [2022-02-11 00:22:42,261 INFO L934 BasicCegarLoop]: 15 mSDtfsCounter, 247 mSDsluCounter, 455 mSDsCounter, 0 mSdLazyCounter, 719 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 247 SdHoareTripleChecker+Valid, 274 SdHoareTripleChecker+Invalid, 810 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 719 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-11 00:22:42,261 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [247 Valid, 274 Invalid, 810 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 719 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-11 00:22:42,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2022-02-11 00:22:42,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 84. [2022-02-11 00:22:42,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 83 states have (on average 2.180722891566265) internal successors, (181), 83 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:22:42,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 181 transitions. [2022-02-11 00:22:42,263 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 181 transitions. Word has length 16 [2022-02-11 00:22:42,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:22:42,263 INFO L470 AbstractCegarLoop]: Abstraction has 84 states and 181 transitions. [2022-02-11 00:22:42,263 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 23 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) [2022-02-11 00:22:42,263 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 181 transitions. [2022-02-11 00:22:42,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-02-11 00:22:42,264 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:22:42,264 INFO L515 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:22:42,281 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2022-02-11 00:22:42,471 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,SelfDestructingSolverStorable41 [2022-02-11 00:22:42,471 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:22:42,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:22:42,472 INFO L85 PathProgramCache]: Analyzing trace with hash 192056335, now seen corresponding path program 34 times [2022-02-11 00:22:42,472 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:22:42,472 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [997582635] [2022-02-11 00:22:42,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:22:42,472 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:22:42,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:22:42,530 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:22:42,531 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:22:42,531 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [997582635] [2022-02-11 00:22:42,531 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [997582635] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:22:42,531 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [850006777] [2022-02-11 00:22:42,531 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-11 00:22:42,531 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:22:42,531 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:22:42,532 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) [2022-02-11 00:22:42,533 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-02-11 00:22:42,562 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-11 00:22:42,562 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:22:42,563 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 15 conjunts are in the unsatisfiable core [2022-02-11 00:22:42,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:22:42,674 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 98 treesize of output 82 [2022-02-11 00:22:42,676 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 82 treesize of output 66 [2022-02-11 00:22:42,742 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:22:42,743 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:22:42,827 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-11 00:22:42,828 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 65 treesize of output 56 [2022-02-11 00:22:42,837 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 34 [2022-02-11 00:22:42,867 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:22:42,867 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [850006777] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:22:42,867 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:22:42,867 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2022-02-11 00:22:42,867 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [871366156] [2022-02-11 00:22:42,867 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:22:42,868 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-02-11 00:22:42,868 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:22:42,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-02-11 00:22:42,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2022-02-11 00:22:42,868 INFO L87 Difference]: Start difference. First operand 84 states and 181 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:22:43,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:22:43,047 INFO L93 Difference]: Finished difference Result 93 states and 195 transitions. [2022-02-11 00:22:43,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-02-11 00:22:43,048 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-02-11 00:22:43,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:22:43,048 INFO L225 Difference]: With dead ends: 93 [2022-02-11 00:22:43,048 INFO L226 Difference]: Without dead ends: 91 [2022-02-11 00:22:43,049 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=79, Invalid=161, Unknown=0, NotChecked=0, Total=240 [2022-02-11 00:22:43,050 INFO L934 BasicCegarLoop]: 7 mSDtfsCounter, 30 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 146 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 146 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-11 00:22:43,050 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 43 Invalid, 152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 146 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-11 00:22:43,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2022-02-11 00:22:43,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 83. [2022-02-11 00:22:43,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 82 states have (on average 2.1707317073170733) internal successors, (178), 82 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:22:43,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 178 transitions. [2022-02-11 00:22:43,052 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 178 transitions. Word has length 16 [2022-02-11 00:22:43,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:22:43,053 INFO L470 AbstractCegarLoop]: Abstraction has 83 states and 178 transitions. [2022-02-11 00:22:43,053 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:22:43,053 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 178 transitions. [2022-02-11 00:22:43,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-02-11 00:22:43,053 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:22:43,053 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:22:43,071 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2022-02-11 00:22:43,267 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:22:43,267 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:22:43,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:22:43,268 INFO L85 PathProgramCache]: Analyzing trace with hash -560398457, now seen corresponding path program 35 times [2022-02-11 00:22:43,268 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:22:43,268 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1508983376] [2022-02-11 00:22:43,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:22:43,268 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:22:43,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:22:43,491 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:22:43,491 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:22:43,491 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1508983376] [2022-02-11 00:22:43,491 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1508983376] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:22:43,491 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1151303735] [2022-02-11 00:22:43,491 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-11 00:22:43,491 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:22:43,492 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:22:43,492 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) [2022-02-11 00:22:43,493 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-02-11 00:22:43,525 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-11 00:22:43,525 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:22:43,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 34 conjunts are in the unsatisfiable core [2022-02-11 00:22:43,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:22:43,822 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 59 [2022-02-11 00:22:43,824 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 47 [2022-02-11 00:22:43,928 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:22:43,929 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:22:44,212 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-11 00:22:44,213 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 125 treesize of output 108 [2022-02-11 00:22:44,217 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 105 treesize of output 85 [2022-02-11 00:22:44,347 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:22:44,348 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1151303735] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:22:44,348 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:22:44,348 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2022-02-11 00:22:44,348 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1248540686] [2022-02-11 00:22:44,348 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:22:44,348 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-02-11 00:22:44,348 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:22:44,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-02-11 00:22:44,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=428, Unknown=0, NotChecked=0, Total=506 [2022-02-11 00:22:44,349 INFO L87 Difference]: Start difference. First operand 83 states and 178 transitions. Second operand has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 23 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) [2022-02-11 00:22:45,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:22:45,505 INFO L93 Difference]: Finished difference Result 231 states and 439 transitions. [2022-02-11 00:22:45,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-02-11 00:22:45,506 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 23 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 16 [2022-02-11 00:22:45,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:22:45,507 INFO L225 Difference]: With dead ends: 231 [2022-02-11 00:22:45,507 INFO L226 Difference]: Without dead ends: 199 [2022-02-11 00:22:45,507 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 396 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=310, Invalid=1496, Unknown=0, NotChecked=0, Total=1806 [2022-02-11 00:22:45,507 INFO L934 BasicCegarLoop]: 13 mSDtfsCounter, 185 mSDsluCounter, 436 mSDsCounter, 0 mSdLazyCounter, 794 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 185 SdHoareTripleChecker+Valid, 245 SdHoareTripleChecker+Invalid, 875 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 794 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-11 00:22:45,507 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [185 Valid, 245 Invalid, 875 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 794 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-11 00:22:45,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2022-02-11 00:22:45,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 92. [2022-02-11 00:22:45,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 91 states have (on average 2.230769230769231) internal successors, (203), 91 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:22:45,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 203 transitions. [2022-02-11 00:22:45,510 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 203 transitions. Word has length 16 [2022-02-11 00:22:45,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:22:45,510 INFO L470 AbstractCegarLoop]: Abstraction has 92 states and 203 transitions. [2022-02-11 00:22:45,510 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 23 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) [2022-02-11 00:22:45,510 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 203 transitions. [2022-02-11 00:22:45,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-02-11 00:22:45,510 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:22:45,510 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:22:45,526 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2022-02-11 00:22:45,723 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,SelfDestructingSolverStorable43 [2022-02-11 00:22:45,723 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:22:45,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:22:45,724 INFO L85 PathProgramCache]: Analyzing trace with hash 1518895371, now seen corresponding path program 36 times [2022-02-11 00:22:45,724 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:22:45,724 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1301267411] [2022-02-11 00:22:45,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:22:45,724 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:22:45,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:22:45,891 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:22:45,891 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:22:45,891 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1301267411] [2022-02-11 00:22:45,891 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1301267411] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:22:45,891 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1711820659] [2022-02-11 00:22:45,891 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-11 00:22:45,892 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:22:45,892 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:22:45,893 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) [2022-02-11 00:22:45,893 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-02-11 00:22:45,923 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-11 00:22:45,924 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:22:45,924 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-11 00:22:45,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:22:46,143 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 95 treesize of output 79 [2022-02-11 00:22:46,145 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 79 treesize of output 63 [2022-02-11 00:22:46,372 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:22:46,372 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:22:46,691 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-11 00:22:46,691 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 107 treesize of output 94 [2022-02-11 00:22:46,695 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 75 [2022-02-11 00:22:46,782 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:22:46,782 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1711820659] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:22:46,783 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:22:46,783 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-02-11 00:22:46,783 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2108904305] [2022-02-11 00:22:46,783 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:22:46,783 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-11 00:22:46,783 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:22:46,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-11 00:22:46,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=402, Unknown=0, NotChecked=0, Total=462 [2022-02-11 00:22:46,784 INFO L87 Difference]: Start difference. First operand 92 states and 203 transitions. Second operand has 22 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:22:48,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:22:48,329 INFO L93 Difference]: Finished difference Result 256 states and 471 transitions. [2022-02-11 00:22:48,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-02-11 00:22:48,329 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-02-11 00:22:48,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:22:48,330 INFO L225 Difference]: With dead ends: 256 [2022-02-11 00:22:48,330 INFO L226 Difference]: Without dead ends: 216 [2022-02-11 00:22:48,330 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 354 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=324, Invalid=1482, Unknown=0, NotChecked=0, Total=1806 [2022-02-11 00:22:48,330 INFO L934 BasicCegarLoop]: 18 mSDtfsCounter, 203 mSDsluCounter, 563 mSDsCounter, 0 mSdLazyCounter, 929 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 203 SdHoareTripleChecker+Valid, 342 SdHoareTripleChecker+Invalid, 1020 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 929 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-11 00:22:48,331 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [203 Valid, 342 Invalid, 1020 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 929 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-11 00:22:48,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2022-02-11 00:22:48,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 98. [2022-02-11 00:22:48,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 97 states have (on average 2.3092783505154637) internal successors, (224), 97 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:22:48,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 224 transitions. [2022-02-11 00:22:48,333 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 224 transitions. Word has length 16 [2022-02-11 00:22:48,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:22:48,333 INFO L470 AbstractCegarLoop]: Abstraction has 98 states and 224 transitions. [2022-02-11 00:22:48,333 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:22:48,333 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 224 transitions. [2022-02-11 00:22:48,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-02-11 00:22:48,333 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:22:48,334 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:22:48,350 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2022-02-11 00:22:48,542 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:22:48,542 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:22:48,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:22:48,542 INFO L85 PathProgramCache]: Analyzing trace with hash -629901165, now seen corresponding path program 37 times [2022-02-11 00:22:48,542 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:22:48,543 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1926394085] [2022-02-11 00:22:48,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:22:48,543 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:22:48,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:22:48,690 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:22:48,690 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:22:48,691 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1926394085] [2022-02-11 00:22:48,691 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1926394085] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:22:48,691 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1696902094] [2022-02-11 00:22:48,691 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-11 00:22:48,691 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:22:48,691 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:22:48,692 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) [2022-02-11 00:22:48,693 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-02-11 00:22:48,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:22:48,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 33 conjunts are in the unsatisfiable core [2022-02-11 00:22:48,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:22:49,046 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 101 treesize of output 85 [2022-02-11 00:22:49,048 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 85 treesize of output 69 [2022-02-11 00:22:49,269 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:22:49,269 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:22:49,667 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-11 00:22:49,667 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 103 treesize of output 90 [2022-02-11 00:22:49,671 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 87 treesize of output 71 [2022-02-11 00:22:49,787 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:22:49,787 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1696902094] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:22:49,787 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:22:49,788 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2022-02-11 00:22:49,788 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [758648102] [2022-02-11 00:22:49,788 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:22:49,788 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-02-11 00:22:49,788 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:22:49,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-02-11 00:22:49,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=429, Unknown=0, NotChecked=0, Total=506 [2022-02-11 00:22:49,788 INFO L87 Difference]: Start difference. First operand 98 states and 224 transitions. Second operand has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 23 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) [2022-02-11 00:22:50,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:22:50,767 INFO L93 Difference]: Finished difference Result 268 states and 506 transitions. [2022-02-11 00:22:50,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-02-11 00:22:50,768 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 23 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 16 [2022-02-11 00:22:50,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:22:50,768 INFO L225 Difference]: With dead ends: 268 [2022-02-11 00:22:50,769 INFO L226 Difference]: Without dead ends: 225 [2022-02-11 00:22:50,769 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 303 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=254, Invalid=1228, Unknown=0, NotChecked=0, Total=1482 [2022-02-11 00:22:50,769 INFO L934 BasicCegarLoop]: 10 mSDtfsCounter, 184 mSDsluCounter, 416 mSDsCounter, 0 mSdLazyCounter, 690 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 184 SdHoareTripleChecker+Valid, 243 SdHoareTripleChecker+Invalid, 775 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 690 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-11 00:22:50,769 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [184 Valid, 243 Invalid, 775 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 690 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-11 00:22:50,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2022-02-11 00:22:50,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 103. [2022-02-11 00:22:50,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 102 states have (on average 2.343137254901961) internal successors, (239), 102 states have internal predecessors, (239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:22:50,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 239 transitions. [2022-02-11 00:22:50,772 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 239 transitions. Word has length 16 [2022-02-11 00:22:50,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:22:50,772 INFO L470 AbstractCegarLoop]: Abstraction has 103 states and 239 transitions. [2022-02-11 00:22:50,772 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 23 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) [2022-02-11 00:22:50,772 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 239 transitions. [2022-02-11 00:22:50,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-02-11 00:22:50,772 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:22:50,772 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:22:50,789 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2022-02-11 00:22:50,983 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2022-02-11 00:22:50,983 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:22:50,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:22:50,983 INFO L85 PathProgramCache]: Analyzing trace with hash -165867449, now seen corresponding path program 38 times [2022-02-11 00:22:50,983 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:22:50,983 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1410167766] [2022-02-11 00:22:50,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:22:50,984 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:22:50,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:22:51,222 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:22:51,222 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:22:51,222 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1410167766] [2022-02-11 00:22:51,222 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1410167766] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:22:51,222 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [647889310] [2022-02-11 00:22:51,222 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-11 00:22:51,223 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:22:51,223 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:22:51,224 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) [2022-02-11 00:22:51,224 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-02-11 00:22:51,255 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-11 00:22:51,255 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:22:51,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-11 00:22:51,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:22:51,535 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 93 treesize of output 77 [2022-02-11 00:22:51,537 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 77 treesize of output 61 [2022-02-11 00:22:51,729 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:22:51,730 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:22:52,062 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-02-11 00:22:52,062 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 147 treesize of output 120 [2022-02-11 00:22:52,066 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 115 treesize of output 83 [2022-02-11 00:22:52,149 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:22:52,149 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [647889310] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:22:52,149 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:22:52,149 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 24 [2022-02-11 00:22:52,149 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [345949845] [2022-02-11 00:22:52,149 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:22:52,149 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-02-11 00:22:52,149 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:22:52,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-02-11 00:22:52,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=489, Unknown=0, NotChecked=0, Total=552 [2022-02-11 00:22:52,150 INFO L87 Difference]: Start difference. First operand 103 states and 239 transitions. Second operand has 24 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 24 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) [2022-02-11 00:22:52,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:22:52,872 INFO L93 Difference]: Finished difference Result 222 states and 445 transitions. [2022-02-11 00:22:52,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-02-11 00:22:52,872 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 24 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 16 [2022-02-11 00:22:52,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:22:52,873 INFO L225 Difference]: With dead ends: 222 [2022-02-11 00:22:52,873 INFO L226 Difference]: Without dead ends: 208 [2022-02-11 00:22:52,873 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=176, Invalid=1156, Unknown=0, NotChecked=0, Total=1332 [2022-02-11 00:22:52,873 INFO L934 BasicCegarLoop]: 17 mSDtfsCounter, 129 mSDsluCounter, 408 mSDsCounter, 0 mSdLazyCounter, 633 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 248 SdHoareTripleChecker+Invalid, 673 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 633 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-11 00:22:52,873 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [129 Valid, 248 Invalid, 673 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 633 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-11 00:22:52,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2022-02-11 00:22:52,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 115. [2022-02-11 00:22:52,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 114 states have (on average 2.4298245614035086) internal successors, (277), 114 states have internal predecessors, (277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:22:52,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 277 transitions. [2022-02-11 00:22:52,876 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 277 transitions. Word has length 16 [2022-02-11 00:22:52,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:22:52,876 INFO L470 AbstractCegarLoop]: Abstraction has 115 states and 277 transitions. [2022-02-11 00:22:52,876 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 24 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) [2022-02-11 00:22:52,876 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 277 transitions. [2022-02-11 00:22:52,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-02-11 00:22:52,876 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:22:52,876 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:22:52,892 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Ended with exit code 0 [2022-02-11 00:22:53,092 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,SelfDestructingSolverStorable46 [2022-02-11 00:22:53,093 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:22:53,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:22:53,093 INFO L85 PathProgramCache]: Analyzing trace with hash -132268221, now seen corresponding path program 39 times [2022-02-11 00:22:53,093 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:22:53,093 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [938299612] [2022-02-11 00:22:53,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:22:53,093 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:22:53,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:22:53,370 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:22:53,370 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:22:53,370 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [938299612] [2022-02-11 00:22:53,370 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [938299612] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:22:53,370 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1291909846] [2022-02-11 00:22:53,370 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-11 00:22:53,371 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:22:53,371 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:22:53,372 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) [2022-02-11 00:22:53,373 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-02-11 00:22:53,405 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-02-11 00:22:53,406 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:22:53,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-11 00:22:53,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:22:53,713 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 93 treesize of output 77 [2022-02-11 00:22:53,716 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 77 treesize of output 61 [2022-02-11 00:22:53,886 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:22:53,886 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:22:54,266 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-02-11 00:22:54,266 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 147 treesize of output 120 [2022-02-11 00:22:54,269 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 115 treesize of output 83 [2022-02-11 00:22:54,356 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:22:54,356 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1291909846] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:22:54,356 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:22:54,357 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2022-02-11 00:22:54,357 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788753951] [2022-02-11 00:22:54,357 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:22:54,357 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-02-11 00:22:54,357 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:22:54,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-02-11 00:22:54,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=445, Unknown=0, NotChecked=0, Total=506 [2022-02-11 00:22:54,357 INFO L87 Difference]: Start difference. First operand 115 states and 277 transitions. Second operand has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 23 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) [2022-02-11 00:22:55,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:22:55,932 INFO L93 Difference]: Finished difference Result 248 states and 494 transitions. [2022-02-11 00:22:55,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-02-11 00:22:55,933 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 23 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 16 [2022-02-11 00:22:55,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:22:55,933 INFO L225 Difference]: With dead ends: 248 [2022-02-11 00:22:55,933 INFO L226 Difference]: Without dead ends: 217 [2022-02-11 00:22:55,934 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 320 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=262, Invalid=1378, Unknown=0, NotChecked=0, Total=1640 [2022-02-11 00:22:55,934 INFO L934 BasicCegarLoop]: 12 mSDtfsCounter, 155 mSDsluCounter, 441 mSDsCounter, 0 mSdLazyCounter, 742 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 155 SdHoareTripleChecker+Valid, 249 SdHoareTripleChecker+Invalid, 835 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 742 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-11 00:22:55,934 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [155 Valid, 249 Invalid, 835 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 742 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-11 00:22:55,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2022-02-11 00:22:55,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 113. [2022-02-11 00:22:55,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 112 states have (on average 2.4107142857142856) internal successors, (270), 112 states have internal predecessors, (270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:22:55,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 270 transitions. [2022-02-11 00:22:55,937 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 270 transitions. Word has length 16 [2022-02-11 00:22:55,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:22:55,937 INFO L470 AbstractCegarLoop]: Abstraction has 113 states and 270 transitions. [2022-02-11 00:22:55,937 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 23 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) [2022-02-11 00:22:55,937 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 270 transitions. [2022-02-11 00:22:55,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-02-11 00:22:55,937 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:22:55,937 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:22:55,953 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2022-02-11 00:22:56,147 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,SelfDestructingSolverStorable47 [2022-02-11 00:22:56,147 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:22:56,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:22:56,148 INFO L85 PathProgramCache]: Analyzing trace with hash 1947025607, now seen corresponding path program 40 times [2022-02-11 00:22:56,148 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:22:56,148 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [291875341] [2022-02-11 00:22:56,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:22:56,148 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:22:56,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:22:56,364 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:22:56,364 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:22:56,364 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [291875341] [2022-02-11 00:22:56,364 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [291875341] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:22:56,364 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [426740154] [2022-02-11 00:22:56,364 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-11 00:22:56,364 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:22:56,364 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:22:56,365 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) [2022-02-11 00:22:56,366 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-02-11 00:22:56,397 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-11 00:22:56,397 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:22:56,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 33 conjunts are in the unsatisfiable core [2022-02-11 00:22:56,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:22:56,670 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 118 treesize of output 98 [2022-02-11 00:22:56,672 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 86 treesize of output 70 [2022-02-11 00:22:56,891 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:22:56,891 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:22:57,484 INFO L353 Elim1Store]: treesize reduction 19, result has 42.4 percent of original size [2022-02-11 00:22:57,485 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 136 treesize of output 105 [2022-02-11 00:22:57,488 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:22:57,489 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:22:57,493 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:22:57,493 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 92 treesize of output 58 [2022-02-11 00:22:57,554 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:22:57,554 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [426740154] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:22:57,555 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:22:57,555 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2022-02-11 00:22:57,555 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [595725786] [2022-02-11 00:22:57,555 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:22:57,555 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-02-11 00:22:57,555 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:22:57,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-02-11 00:22:57,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=435, Unknown=0, NotChecked=0, Total=506 [2022-02-11 00:22:57,556 INFO L87 Difference]: Start difference. First operand 113 states and 270 transitions. Second operand has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 23 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) [2022-02-11 00:23:00,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:23:00,407 INFO L93 Difference]: Finished difference Result 335 states and 631 transitions. [2022-02-11 00:23:00,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-02-11 00:23:00,407 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 23 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 16 [2022-02-11 00:23:00,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:23:00,408 INFO L225 Difference]: With dead ends: 335 [2022-02-11 00:23:00,408 INFO L226 Difference]: Without dead ends: 302 [2022-02-11 00:23:00,409 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 610 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=475, Invalid=2075, Unknown=0, NotChecked=0, Total=2550 [2022-02-11 00:23:00,409 INFO L934 BasicCegarLoop]: 10 mSDtfsCounter, 230 mSDsluCounter, 483 mSDsCounter, 0 mSdLazyCounter, 817 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 230 SdHoareTripleChecker+Valid, 285 SdHoareTripleChecker+Invalid, 926 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 817 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-11 00:23:00,409 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [230 Valid, 285 Invalid, 926 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [109 Valid, 817 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-11 00:23:00,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 302 states. [2022-02-11 00:23:00,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 302 to 120. [2022-02-11 00:23:00,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 119 states have (on average 2.453781512605042) internal successors, (292), 119 states have internal predecessors, (292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:23:00,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 292 transitions. [2022-02-11 00:23:00,412 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 292 transitions. Word has length 16 [2022-02-11 00:23:00,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:23:00,412 INFO L470 AbstractCegarLoop]: Abstraction has 120 states and 292 transitions. [2022-02-11 00:23:00,412 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 23 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) [2022-02-11 00:23:00,412 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 292 transitions. [2022-02-11 00:23:00,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-02-11 00:23:00,413 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:23:00,413 INFO L515 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:23:00,429 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2022-02-11 00:23:00,629 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,SelfDestructingSolverStorable48 [2022-02-11 00:23:00,629 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:23:00,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:23:00,629 INFO L85 PathProgramCache]: Analyzing trace with hash 1118959171, now seen corresponding path program 41 times [2022-02-11 00:23:00,629 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:23:00,629 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [905323795] [2022-02-11 00:23:00,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:23:00,630 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:23:00,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:23:00,689 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:23:00,689 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:23:00,689 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [905323795] [2022-02-11 00:23:00,689 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [905323795] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:23:00,689 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [92082028] [2022-02-11 00:23:00,689 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-11 00:23:00,690 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:23:00,690 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:23:00,691 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) [2022-02-11 00:23:00,692 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2022-02-11 00:23:00,726 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-11 00:23:00,726 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:23:00,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 15 conjunts are in the unsatisfiable core [2022-02-11 00:23:00,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:23:00,819 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 87 treesize of output 71 [2022-02-11 00:23:00,821 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 55 [2022-02-11 00:23:00,894 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:23:00,894 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:23:01,029 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:23:01,029 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 34 treesize of output 34 [2022-02-11 00:23:01,035 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:23:01,035 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 26 treesize of output 26 [2022-02-11 00:23:01,078 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:23:01,078 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [92082028] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:23:01,079 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:23:01,079 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2022-02-11 00:23:01,079 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [19062346] [2022-02-11 00:23:01,079 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:23:01,079 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-02-11 00:23:01,079 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:23:01,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-02-11 00:23:01,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2022-02-11 00:23:01,079 INFO L87 Difference]: Start difference. First operand 120 states and 292 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 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) [2022-02-11 00:23:01,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:23:01,152 INFO L93 Difference]: Finished difference Result 146 states and 340 transitions. [2022-02-11 00:23:01,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-11 00:23:01,152 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 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 16 [2022-02-11 00:23:01,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:23:01,153 INFO L225 Difference]: With dead ends: 146 [2022-02-11 00:23:01,153 INFO L226 Difference]: Without dead ends: 146 [2022-02-11 00:23:01,153 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2022-02-11 00:23:01,153 INFO L934 BasicCegarLoop]: 8 mSDtfsCounter, 11 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 193 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 200 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 193 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-11 00:23:01,153 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 65 Invalid, 200 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 193 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-11 00:23:01,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2022-02-11 00:23:01,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 120. [2022-02-11 00:23:01,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 119 states have (on average 2.436974789915966) internal successors, (290), 119 states have internal predecessors, (290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:23:01,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 290 transitions. [2022-02-11 00:23:01,156 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 290 transitions. Word has length 16 [2022-02-11 00:23:01,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:23:01,156 INFO L470 AbstractCegarLoop]: Abstraction has 120 states and 290 transitions. [2022-02-11 00:23:01,156 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 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) [2022-02-11 00:23:01,156 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 290 transitions. [2022-02-11 00:23:01,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-02-11 00:23:01,156 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:23:01,156 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:23:01,173 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2022-02-11 00:23:01,372 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2022-02-11 00:23:01,373 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:23:01,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:23:01,373 INFO L85 PathProgramCache]: Analyzing trace with hash -1434653117, now seen corresponding path program 42 times [2022-02-11 00:23:01,373 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:23:01,373 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [102983513] [2022-02-11 00:23:01,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:23:01,373 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:23:01,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:23:01,602 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:23:01,602 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:23:01,602 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [102983513] [2022-02-11 00:23:01,602 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [102983513] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:23:01,603 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [298731350] [2022-02-11 00:23:01,603 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-11 00:23:01,603 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:23:01,603 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:23:01,604 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) [2022-02-11 00:23:01,605 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2022-02-11 00:23:01,638 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-11 00:23:01,639 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:23:01,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 33 conjunts are in the unsatisfiable core [2022-02-11 00:23:01,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:23:01,953 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 59 [2022-02-11 00:23:01,956 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 47 [2022-02-11 00:23:02,066 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:23:02,066 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:23:02,399 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-11 00:23:02,400 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 125 treesize of output 108 [2022-02-11 00:23:02,404 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 105 treesize of output 85 [2022-02-11 00:23:02,518 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:23:02,518 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [298731350] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:23:02,518 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:23:02,518 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 22 [2022-02-11 00:23:02,518 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1375754997] [2022-02-11 00:23:02,518 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:23:02,518 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-11 00:23:02,518 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:23:02,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-11 00:23:02,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=387, Unknown=0, NotChecked=0, Total=462 [2022-02-11 00:23:02,519 INFO L87 Difference]: Start difference. First operand 120 states and 290 transitions. Second operand has 22 states, 22 states have (on average 1.6363636363636365) internal successors, (36), 22 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) [2022-02-11 00:23:03,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:23:03,211 INFO L93 Difference]: Finished difference Result 227 states and 483 transitions. [2022-02-11 00:23:03,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-02-11 00:23:03,214 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.6363636363636365) internal successors, (36), 22 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 16 [2022-02-11 00:23:03,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:23:03,215 INFO L225 Difference]: With dead ends: 227 [2022-02-11 00:23:03,215 INFO L226 Difference]: Without dead ends: 209 [2022-02-11 00:23:03,215 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=189, Invalid=741, Unknown=0, NotChecked=0, Total=930 [2022-02-11 00:23:03,215 INFO L934 BasicCegarLoop]: 9 mSDtfsCounter, 127 mSDsluCounter, 260 mSDsCounter, 0 mSdLazyCounter, 515 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 581 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 515 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-11 00:23:03,215 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [127 Valid, 151 Invalid, 581 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 515 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-11 00:23:03,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2022-02-11 00:23:03,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 127. [2022-02-11 00:23:03,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 126 states have (on average 2.4761904761904763) internal successors, (312), 126 states have internal predecessors, (312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:23:03,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 312 transitions. [2022-02-11 00:23:03,218 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 312 transitions. Word has length 16 [2022-02-11 00:23:03,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:23:03,218 INFO L470 AbstractCegarLoop]: Abstraction has 127 states and 312 transitions. [2022-02-11 00:23:03,218 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.6363636363636365) internal successors, (36), 22 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) [2022-02-11 00:23:03,218 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 312 transitions. [2022-02-11 00:23:03,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-02-11 00:23:03,218 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:23:03,219 INFO L515 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:23:03,235 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2022-02-11 00:23:03,435 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:23:03,435 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:23:03,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:23:03,436 INFO L85 PathProgramCache]: Analyzing trace with hash -1703294243, now seen corresponding path program 43 times [2022-02-11 00:23:03,436 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:23:03,436 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [431822525] [2022-02-11 00:23:03,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:23:03,436 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:23:03,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:23:03,491 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:23:03,491 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:23:03,491 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [431822525] [2022-02-11 00:23:03,491 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [431822525] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:23:03,491 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [467651716] [2022-02-11 00:23:03,491 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-11 00:23:03,491 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:23:03,492 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:23:03,492 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) [2022-02-11 00:23:03,533 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2022-02-11 00:23:03,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:23:03,548 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 15 conjunts are in the unsatisfiable core [2022-02-11 00:23:03,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:23:03,645 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 98 treesize of output 82 [2022-02-11 00:23:03,646 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 82 treesize of output 66 [2022-02-11 00:23:03,717 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:23:03,717 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:23:03,795 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:23:03,795 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 63 treesize of output 59 [2022-02-11 00:23:03,802 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:23:03,802 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 51 treesize of output 47 [2022-02-11 00:23:03,933 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:23:03,933 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [467651716] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:23:03,934 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:23:03,934 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2022-02-11 00:23:03,934 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [751874080] [2022-02-11 00:23:03,934 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:23:03,934 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-02-11 00:23:03,934 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:23:03,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-02-11 00:23:03,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2022-02-11 00:23:03,935 INFO L87 Difference]: Start difference. First operand 127 states and 312 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:23:03,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:23:03,987 INFO L93 Difference]: Finished difference Result 135 states and 324 transitions. [2022-02-11 00:23:03,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-02-11 00:23:03,987 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have 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 [2022-02-11 00:23:03,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:23:03,988 INFO L225 Difference]: With dead ends: 135 [2022-02-11 00:23:03,988 INFO L226 Difference]: Without dead ends: 135 [2022-02-11 00:23:03,988 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2022-02-11 00:23:03,988 INFO L934 BasicCegarLoop]: 6 mSDtfsCounter, 10 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-11 00:23:03,988 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 33 Invalid, 122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 119 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-11 00:23:03,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2022-02-11 00:23:03,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 126. [2022-02-11 00:23:03,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 125 states have (on average 2.456) internal successors, (307), 125 states have internal predecessors, (307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:23:03,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 307 transitions. [2022-02-11 00:23:03,990 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 307 transitions. Word has length 16 [2022-02-11 00:23:03,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:23:03,991 INFO L470 AbstractCegarLoop]: Abstraction has 126 states and 307 transitions. [2022-02-11 00:23:03,991 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:23:03,991 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 307 transitions. [2022-02-11 00:23:03,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-02-11 00:23:03,991 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:23:03,991 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:23:04,011 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2022-02-11 00:23:04,199 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,SelfDestructingSolverStorable51 [2022-02-11 00:23:04,199 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:23:04,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:23:04,200 INFO L85 PathProgramCache]: Analyzing trace with hash 644640711, now seen corresponding path program 44 times [2022-02-11 00:23:04,200 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:23:04,200 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [233052631] [2022-02-11 00:23:04,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:23:04,200 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:23:04,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:23:04,367 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:23:04,368 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:23:04,368 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [233052631] [2022-02-11 00:23:04,368 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [233052631] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:23:04,368 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2026379032] [2022-02-11 00:23:04,368 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-11 00:23:04,368 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:23:04,368 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:23:04,369 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) [2022-02-11 00:23:04,369 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2022-02-11 00:23:04,400 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-11 00:23:04,400 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:23:04,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 33 conjunts are in the unsatisfiable core [2022-02-11 00:23:04,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:23:04,603 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 102 treesize of output 86 [2022-02-11 00:23:04,606 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 86 treesize of output 70 [2022-02-11 00:23:04,851 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:23:04,852 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:23:05,309 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-11 00:23:05,309 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 118 treesize of output 101 [2022-02-11 00:23:05,313 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 98 treesize of output 78 [2022-02-11 00:23:05,426 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:23:05,426 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2026379032] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:23:05,426 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:23:05,426 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 22 [2022-02-11 00:23:05,426 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938207354] [2022-02-11 00:23:05,426 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:23:05,426 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-11 00:23:05,426 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:23:05,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-11 00:23:05,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=388, Unknown=0, NotChecked=0, Total=462 [2022-02-11 00:23:05,427 INFO L87 Difference]: Start difference. First operand 126 states and 307 transitions. Second operand has 22 states, 22 states have (on average 1.6363636363636365) internal successors, (36), 22 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) [2022-02-11 00:23:06,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:23:06,290 INFO L93 Difference]: Finished difference Result 276 states and 556 transitions. [2022-02-11 00:23:06,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-02-11 00:23:06,290 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.6363636363636365) internal successors, (36), 22 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 16 [2022-02-11 00:23:06,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:23:06,291 INFO L225 Difference]: With dead ends: 276 [2022-02-11 00:23:06,291 INFO L226 Difference]: Without dead ends: 243 [2022-02-11 00:23:06,291 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=216, Invalid=840, Unknown=0, NotChecked=0, Total=1056 [2022-02-11 00:23:06,292 INFO L934 BasicCegarLoop]: 12 mSDtfsCounter, 185 mSDsluCounter, 416 mSDsCounter, 0 mSdLazyCounter, 641 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 185 SdHoareTripleChecker+Valid, 262 SdHoareTripleChecker+Invalid, 731 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 641 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-11 00:23:06,292 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [185 Valid, 262 Invalid, 731 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 641 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-11 00:23:06,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2022-02-11 00:23:06,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 128. [2022-02-11 00:23:06,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 127 states have (on average 2.4645669291338583) internal successors, (313), 127 states have internal predecessors, (313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:23:06,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 313 transitions. [2022-02-11 00:23:06,294 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 313 transitions. Word has length 16 [2022-02-11 00:23:06,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:23:06,294 INFO L470 AbstractCegarLoop]: Abstraction has 128 states and 313 transitions. [2022-02-11 00:23:06,295 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.6363636363636365) internal successors, (36), 22 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) [2022-02-11 00:23:06,295 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 313 transitions. [2022-02-11 00:23:06,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-02-11 00:23:06,295 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:23:06,295 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:23:06,313 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2022-02-11 00:23:06,511 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:23:06,511 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:23:06,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:23:06,512 INFO L85 PathProgramCache]: Analyzing trace with hash -1504155825, now seen corresponding path program 45 times [2022-02-11 00:23:06,512 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:23:06,512 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [80622490] [2022-02-11 00:23:06,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:23:06,512 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:23:06,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:23:06,682 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:23:06,683 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:23:06,683 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [80622490] [2022-02-11 00:23:06,683 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [80622490] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:23:06,683 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [817784302] [2022-02-11 00:23:06,683 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-11 00:23:06,683 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:23:06,683 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:23:06,684 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) [2022-02-11 00:23:06,711 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2022-02-11 00:23:06,718 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-11 00:23:06,718 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:23:06,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 33 conjunts are in the unsatisfiable core [2022-02-11 00:23:06,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:23:06,990 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 101 treesize of output 85 [2022-02-11 00:23:06,992 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 85 treesize of output 69 [2022-02-11 00:23:07,266 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:23:07,266 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:23:07,711 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-11 00:23:07,712 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 111 treesize of output 96 [2022-02-11 00:23:07,715 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 93 treesize of output 75 [2022-02-11 00:23:07,845 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:23:07,845 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [817784302] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:23:07,845 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:23:07,845 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 22 [2022-02-11 00:23:07,846 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1735705770] [2022-02-11 00:23:07,846 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:23:07,846 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-11 00:23:07,846 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:23:07,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-11 00:23:07,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=388, Unknown=0, NotChecked=0, Total=462 [2022-02-11 00:23:07,846 INFO L87 Difference]: Start difference. First operand 128 states and 313 transitions. Second operand has 22 states, 22 states have (on average 1.6363636363636365) internal successors, (36), 22 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) [2022-02-11 00:23:09,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:23:09,155 INFO L93 Difference]: Finished difference Result 268 states and 543 transitions. [2022-02-11 00:23:09,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-02-11 00:23:09,155 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.6363636363636365) internal successors, (36), 22 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 16 [2022-02-11 00:23:09,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:23:09,156 INFO L225 Difference]: With dead ends: 268 [2022-02-11 00:23:09,156 INFO L226 Difference]: Without dead ends: 218 [2022-02-11 00:23:09,156 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 423 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=327, Invalid=1479, Unknown=0, NotChecked=0, Total=1806 [2022-02-11 00:23:09,156 INFO L934 BasicCegarLoop]: 12 mSDtfsCounter, 209 mSDsluCounter, 313 mSDsCounter, 0 mSdLazyCounter, 490 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 209 SdHoareTripleChecker+Valid, 189 SdHoareTripleChecker+Invalid, 594 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 490 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-11 00:23:09,157 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [209 Valid, 189 Invalid, 594 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 490 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-11 00:23:09,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2022-02-11 00:23:09,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 131. [2022-02-11 00:23:09,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 130 states have (on average 2.476923076923077) internal successors, (322), 130 states have internal predecessors, (322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:23:09,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 322 transitions. [2022-02-11 00:23:09,159 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 322 transitions. Word has length 16 [2022-02-11 00:23:09,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:23:09,159 INFO L470 AbstractCegarLoop]: Abstraction has 131 states and 322 transitions. [2022-02-11 00:23:09,159 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.6363636363636365) internal successors, (36), 22 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) [2022-02-11 00:23:09,159 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 322 transitions. [2022-02-11 00:23:09,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-02-11 00:23:09,160 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:23:09,160 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:23:09,177 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2022-02-11 00:23:09,375 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,SelfDestructingSolverStorable53 [2022-02-11 00:23:09,376 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:23:09,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:23:09,376 INFO L85 PathProgramCache]: Analyzing trace with hash 602628295, now seen corresponding path program 46 times [2022-02-11 00:23:09,376 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:23:09,376 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [19382832] [2022-02-11 00:23:09,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:23:09,376 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:23:09,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:23:09,546 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:23:09,547 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:23:09,547 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [19382832] [2022-02-11 00:23:09,547 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [19382832] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:23:09,547 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1057595303] [2022-02-11 00:23:09,547 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-11 00:23:09,547 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:23:09,547 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:23:09,548 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) [2022-02-11 00:23:09,549 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2022-02-11 00:23:09,581 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-11 00:23:09,581 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:23:09,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-11 00:23:09,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:23:09,803 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 95 treesize of output 79 [2022-02-11 00:23:09,805 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 79 treesize of output 63 [2022-02-11 00:23:10,056 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:23:10,056 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:23:10,589 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-02-11 00:23:10,590 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 138 treesize of output 111 [2022-02-11 00:23:10,599 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 106 treesize of output 74 [2022-02-11 00:23:10,687 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:23:10,687 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1057595303] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:23:10,687 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:23:10,687 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2022-02-11 00:23:10,687 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1250323293] [2022-02-11 00:23:10,688 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:23:10,688 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-02-11 00:23:10,688 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:23:10,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-02-11 00:23:10,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=442, Unknown=0, NotChecked=0, Total=506 [2022-02-11 00:23:10,688 INFO L87 Difference]: Start difference. First operand 131 states and 322 transitions. Second operand has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 23 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) [2022-02-11 00:23:12,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:23:12,884 INFO L93 Difference]: Finished difference Result 313 states and 634 transitions. [2022-02-11 00:23:12,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-02-11 00:23:12,885 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 23 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 16 [2022-02-11 00:23:12,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:23:12,886 INFO L225 Difference]: With dead ends: 313 [2022-02-11 00:23:12,886 INFO L226 Difference]: Without dead ends: 257 [2022-02-11 00:23:12,886 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 505 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=416, Invalid=2034, Unknown=0, NotChecked=0, Total=2450 [2022-02-11 00:23:12,890 INFO L934 BasicCegarLoop]: 16 mSDtfsCounter, 213 mSDsluCounter, 584 mSDsCounter, 0 mSdLazyCounter, 906 mSolverCounterSat, 148 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 213 SdHoareTripleChecker+Valid, 342 SdHoareTripleChecker+Invalid, 1054 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 148 IncrementalHoareTripleChecker+Valid, 906 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-11 00:23:12,890 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [213 Valid, 342 Invalid, 1054 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [148 Valid, 906 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-11 00:23:12,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2022-02-11 00:23:12,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 142. [2022-02-11 00:23:12,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 141 states have (on average 2.4893617021276597) internal successors, (351), 141 states have internal predecessors, (351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:23:12,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 351 transitions. [2022-02-11 00:23:12,893 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 351 transitions. Word has length 16 [2022-02-11 00:23:12,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:23:12,893 INFO L470 AbstractCegarLoop]: Abstraction has 142 states and 351 transitions. [2022-02-11 00:23:12,893 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 23 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) [2022-02-11 00:23:12,893 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 351 transitions. [2022-02-11 00:23:12,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-02-11 00:23:12,893 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:23:12,894 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:23:12,913 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2022-02-11 00:23:13,113 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:23:13,113 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:23:13,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:23:13,113 INFO L85 PathProgramCache]: Analyzing trace with hash 682755023, now seen corresponding path program 47 times [2022-02-11 00:23:13,113 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:23:13,113 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2042253201] [2022-02-11 00:23:13,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:23:13,114 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:23:13,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:23:13,289 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:23:13,289 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:23:13,289 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2042253201] [2022-02-11 00:23:13,289 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2042253201] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:23:13,289 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [93120024] [2022-02-11 00:23:13,289 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-11 00:23:13,289 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:23:13,289 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:23:13,290 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) [2022-02-11 00:23:13,291 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2022-02-11 00:23:13,322 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-11 00:23:13,322 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:23:13,323 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 33 conjunts are in the unsatisfiable core [2022-02-11 00:23:13,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:23:13,597 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 59 [2022-02-11 00:23:13,599 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 47 [2022-02-11 00:23:13,708 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:23:13,708 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:23:14,060 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-02-11 00:23:14,060 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 147 treesize of output 120 [2022-02-11 00:23:14,064 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 115 treesize of output 83 [2022-02-11 00:23:14,200 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:23:14,200 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [93120024] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:23:14,200 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:23:14,200 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 24 [2022-02-11 00:23:14,201 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1672805236] [2022-02-11 00:23:14,201 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:23:14,201 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-02-11 00:23:14,201 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:23:14,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-02-11 00:23:14,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=474, Unknown=0, NotChecked=0, Total=552 [2022-02-11 00:23:14,202 INFO L87 Difference]: Start difference. First operand 142 states and 351 transitions. Second operand has 24 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 24 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) [2022-02-11 00:23:15,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:23:15,262 INFO L93 Difference]: Finished difference Result 266 states and 565 transitions. [2022-02-11 00:23:15,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-02-11 00:23:15,263 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 24 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 16 [2022-02-11 00:23:15,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:23:15,264 INFO L225 Difference]: With dead ends: 266 [2022-02-11 00:23:15,264 INFO L226 Difference]: Without dead ends: 239 [2022-02-11 00:23:15,264 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 340 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=257, Invalid=1383, Unknown=0, NotChecked=0, Total=1640 [2022-02-11 00:23:15,268 INFO L934 BasicCegarLoop]: 11 mSDtfsCounter, 141 mSDsluCounter, 388 mSDsCounter, 0 mSdLazyCounter, 665 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 222 SdHoareTripleChecker+Invalid, 726 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 665 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-11 00:23:15,268 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [141 Valid, 222 Invalid, 726 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 665 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-11 00:23:15,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2022-02-11 00:23:15,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 150. [2022-02-11 00:23:15,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 149 states have (on average 2.530201342281879) internal successors, (377), 149 states have internal predecessors, (377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:23:15,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 377 transitions. [2022-02-11 00:23:15,271 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 377 transitions. Word has length 16 [2022-02-11 00:23:15,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:23:15,271 INFO L470 AbstractCegarLoop]: Abstraction has 150 states and 377 transitions. [2022-02-11 00:23:15,271 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 24 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) [2022-02-11 00:23:15,271 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 377 transitions. [2022-02-11 00:23:15,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-02-11 00:23:15,271 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:23:15,271 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:23:15,287 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2022-02-11 00:23:15,474 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:23:15,474 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:23:15,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:23:15,474 INFO L85 PathProgramCache]: Analyzing trace with hash 716354251, now seen corresponding path program 48 times [2022-02-11 00:23:15,474 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:23:15,475 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1801218297] [2022-02-11 00:23:15,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:23:15,475 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:23:15,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:23:15,692 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:23:15,692 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:23:15,693 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1801218297] [2022-02-11 00:23:15,693 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1801218297] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:23:15,693 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2035936655] [2022-02-11 00:23:15,693 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-11 00:23:15,693 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:23:15,693 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:23:15,694 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) [2022-02-11 00:23:15,694 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2022-02-11 00:23:15,727 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-02-11 00:23:15,727 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:23:15,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-11 00:23:15,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:23:16,005 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 75 [2022-02-11 00:23:16,007 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 59 [2022-02-11 00:23:16,184 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:23:16,185 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:23:16,527 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-02-11 00:23:16,527 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 147 treesize of output 120 [2022-02-11 00:23:16,531 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 115 treesize of output 83 [2022-02-11 00:23:16,623 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:23:16,623 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2035936655] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:23:16,623 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:23:16,623 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2022-02-11 00:23:16,624 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114185025] [2022-02-11 00:23:16,624 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:23:16,624 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-02-11 00:23:16,624 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:23:16,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-02-11 00:23:16,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2022-02-11 00:23:16,624 INFO L87 Difference]: Start difference. First operand 150 states and 377 transitions. Second operand has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 23 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) [2022-02-11 00:23:18,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:23:18,265 INFO L93 Difference]: Finished difference Result 292 states and 619 transitions. [2022-02-11 00:23:18,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-02-11 00:23:18,265 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 23 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 16 [2022-02-11 00:23:18,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:23:18,266 INFO L225 Difference]: With dead ends: 292 [2022-02-11 00:23:18,266 INFO L226 Difference]: Without dead ends: 260 [2022-02-11 00:23:18,267 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 360 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=259, Invalid=1463, Unknown=0, NotChecked=0, Total=1722 [2022-02-11 00:23:18,267 INFO L934 BasicCegarLoop]: 13 mSDtfsCounter, 170 mSDsluCounter, 365 mSDsCounter, 0 mSdLazyCounter, 595 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 170 SdHoareTripleChecker+Valid, 218 SdHoareTripleChecker+Invalid, 682 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 595 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-11 00:23:18,267 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [170 Valid, 218 Invalid, 682 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 595 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-11 00:23:18,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2022-02-11 00:23:18,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 150. [2022-02-11 00:23:18,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 149 states have (on average 2.530201342281879) internal successors, (377), 149 states have internal predecessors, (377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:23:18,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 377 transitions. [2022-02-11 00:23:18,281 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 377 transitions. Word has length 16 [2022-02-11 00:23:18,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:23:18,281 INFO L470 AbstractCegarLoop]: Abstraction has 150 states and 377 transitions. [2022-02-11 00:23:18,281 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 23 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) [2022-02-11 00:23:18,282 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 377 transitions. [2022-02-11 00:23:18,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-02-11 00:23:18,282 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:23:18,282 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:23:18,298 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Ended with exit code 0 [2022-02-11 00:23:18,482 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2022-02-11 00:23:18,482 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:23:18,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:23:18,483 INFO L85 PathProgramCache]: Analyzing trace with hash -1499319217, now seen corresponding path program 49 times [2022-02-11 00:23:18,483 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:23:18,483 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1158166851] [2022-02-11 00:23:18,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:23:18,483 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:23:18,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:23:18,651 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:23:18,651 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:23:18,651 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1158166851] [2022-02-11 00:23:18,651 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1158166851] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:23:18,652 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1847936439] [2022-02-11 00:23:18,652 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-11 00:23:18,652 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:23:18,652 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:23:18,653 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) [2022-02-11 00:23:18,653 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2022-02-11 00:23:18,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:23:18,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-11 00:23:18,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:23:18,957 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 99 treesize of output 83 [2022-02-11 00:23:18,959 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 83 treesize of output 67 [2022-02-11 00:23:19,171 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:23:19,172 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:23:19,489 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-02-11 00:23:19,489 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 121 treesize of output 102 [2022-02-11 00:23:19,492 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 97 treesize of output 73 [2022-02-11 00:23:19,597 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:23:19,597 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1847936439] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:23:19,597 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:23:19,597 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2022-02-11 00:23:19,598 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532436436] [2022-02-11 00:23:19,598 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:23:19,598 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-02-11 00:23:19,598 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:23:19,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-02-11 00:23:19,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=431, Unknown=0, NotChecked=0, Total=506 [2022-02-11 00:23:19,598 INFO L87 Difference]: Start difference. First operand 150 states and 377 transitions. Second operand has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 23 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) [2022-02-11 00:23:20,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:23:20,470 INFO L93 Difference]: Finished difference Result 297 states and 620 transitions. [2022-02-11 00:23:20,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-02-11 00:23:20,470 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 23 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 16 [2022-02-11 00:23:20,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:23:20,471 INFO L225 Difference]: With dead ends: 297 [2022-02-11 00:23:20,471 INFO L226 Difference]: Without dead ends: 262 [2022-02-11 00:23:20,471 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 261 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=229, Invalid=1103, Unknown=0, NotChecked=0, Total=1332 [2022-02-11 00:23:20,471 INFO L934 BasicCegarLoop]: 11 mSDtfsCounter, 149 mSDsluCounter, 394 mSDsCounter, 0 mSdLazyCounter, 685 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 230 SdHoareTripleChecker+Invalid, 762 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 685 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-11 00:23:20,471 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [149 Valid, 230 Invalid, 762 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 685 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-11 00:23:20,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2022-02-11 00:23:20,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 151. [2022-02-11 00:23:20,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 150 states have (on average 2.526666666666667) internal successors, (379), 150 states have internal predecessors, (379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:23:20,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 379 transitions. [2022-02-11 00:23:20,475 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 379 transitions. Word has length 16 [2022-02-11 00:23:20,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:23:20,475 INFO L470 AbstractCegarLoop]: Abstraction has 151 states and 379 transitions. [2022-02-11 00:23:20,475 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 23 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) [2022-02-11 00:23:20,475 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 379 transitions. [2022-02-11 00:23:20,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-02-11 00:23:20,475 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:23:20,475 INFO L515 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:23:20,491 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2022-02-11 00:23:20,687 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,SelfDestructingSolverStorable57 [2022-02-11 00:23:20,687 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:23:20,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:23:20,688 INFO L85 PathProgramCache]: Analyzing trace with hash 1967581643, now seen corresponding path program 50 times [2022-02-11 00:23:20,688 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:23:20,688 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [102765147] [2022-02-11 00:23:20,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:23:20,688 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:23:20,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:23:20,776 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:23:20,776 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:23:20,776 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [102765147] [2022-02-11 00:23:20,776 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [102765147] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:23:20,776 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1075429650] [2022-02-11 00:23:20,776 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-11 00:23:20,777 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:23:20,777 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:23:20,777 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) [2022-02-11 00:23:20,779 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2022-02-11 00:23:20,809 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-11 00:23:20,809 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:23:20,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 15 conjunts are in the unsatisfiable core [2022-02-11 00:23:20,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:23:20,898 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 87 treesize of output 71 [2022-02-11 00:23:20,900 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 55 [2022-02-11 00:23:20,974 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:23:20,974 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:23:21,082 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:23:21,082 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 33 treesize of output 33 [2022-02-11 00:23:21,087 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:23:21,087 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 25 treesize of output 25 [2022-02-11 00:23:21,118 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:23:21,118 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1075429650] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:23:21,118 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:23:21,118 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2022-02-11 00:23:21,118 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1366647960] [2022-02-11 00:23:21,118 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:23:21,119 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-02-11 00:23:21,119 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:23:21,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-02-11 00:23:21,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2022-02-11 00:23:21,119 INFO L87 Difference]: Start difference. First operand 151 states and 379 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 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) [2022-02-11 00:23:21,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:23:21,199 INFO L93 Difference]: Finished difference Result 171 states and 414 transitions. [2022-02-11 00:23:21,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-11 00:23:21,199 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 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 16 [2022-02-11 00:23:21,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:23:21,200 INFO L225 Difference]: With dead ends: 171 [2022-02-11 00:23:21,200 INFO L226 Difference]: Without dead ends: 171 [2022-02-11 00:23:21,200 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2022-02-11 00:23:21,200 INFO L934 BasicCegarLoop]: 7 mSDtfsCounter, 11 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 155 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 155 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-11 00:23:21,200 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 47 Invalid, 159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 155 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-11 00:23:21,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2022-02-11 00:23:21,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 152. [2022-02-11 00:23:21,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 151 states have (on average 2.5231788079470197) internal successors, (381), 151 states have internal predecessors, (381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:23:21,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 381 transitions. [2022-02-11 00:23:21,202 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 381 transitions. Word has length 16 [2022-02-11 00:23:21,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:23:21,203 INFO L470 AbstractCegarLoop]: Abstraction has 152 states and 381 transitions. [2022-02-11 00:23:21,203 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 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) [2022-02-11 00:23:21,203 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 381 transitions. [2022-02-11 00:23:21,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-02-11 00:23:21,203 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:23:21,203 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:23:21,219 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Ended with exit code 0 [2022-02-11 00:23:21,419 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,SelfDestructingSolverStorable58 [2022-02-11 00:23:21,419 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:23:21,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:23:21,420 INFO L85 PathProgramCache]: Analyzing trace with hash 622925699, now seen corresponding path program 51 times [2022-02-11 00:23:21,420 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:23:21,420 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [328626787] [2022-02-11 00:23:21,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:23:21,420 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:23:21,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:23:21,607 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:23:21,607 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:23:21,607 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [328626787] [2022-02-11 00:23:21,607 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [328626787] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:23:21,607 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [187117113] [2022-02-11 00:23:21,607 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-11 00:23:21,607 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:23:21,608 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:23:21,608 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) [2022-02-11 00:23:21,609 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2022-02-11 00:23:21,643 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-11 00:23:21,643 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:23:21,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 33 conjunts are in the unsatisfiable core [2022-02-11 00:23:21,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:23:21,893 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 99 treesize of output 83 [2022-02-11 00:23:21,896 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 83 treesize of output 67 [2022-02-11 00:23:22,150 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:23:22,150 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:23:22,447 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-11 00:23:22,447 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 110 treesize of output 97 [2022-02-11 00:23:22,450 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 94 treesize of output 78 [2022-02-11 00:23:22,571 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:23:22,572 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [187117113] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:23:22,572 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:23:22,572 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 22 [2022-02-11 00:23:22,572 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1875644874] [2022-02-11 00:23:22,572 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:23:22,572 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-11 00:23:22,572 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:23:22,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-11 00:23:22,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=392, Unknown=0, NotChecked=0, Total=462 [2022-02-11 00:23:22,573 INFO L87 Difference]: Start difference. First operand 152 states and 381 transitions. Second operand has 22 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:23:24,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:23:24,095 INFO L93 Difference]: Finished difference Result 296 states and 612 transitions. [2022-02-11 00:23:24,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-02-11 00:23:24,095 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-02-11 00:23:24,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:23:24,096 INFO L225 Difference]: With dead ends: 296 [2022-02-11 00:23:24,096 INFO L226 Difference]: Without dead ends: 247 [2022-02-11 00:23:24,096 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 529 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=339, Invalid=1641, Unknown=0, NotChecked=0, Total=1980 [2022-02-11 00:23:24,097 INFO L934 BasicCegarLoop]: 10 mSDtfsCounter, 195 mSDsluCounter, 375 mSDsCounter, 0 mSdLazyCounter, 638 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 195 SdHoareTripleChecker+Valid, 216 SdHoareTripleChecker+Invalid, 728 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 638 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-11 00:23:24,097 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [195 Valid, 216 Invalid, 728 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 638 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-11 00:23:24,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2022-02-11 00:23:24,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 156. [2022-02-11 00:23:24,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 155 states have (on average 2.541935483870968) internal successors, (394), 155 states have internal predecessors, (394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:23:24,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 394 transitions. [2022-02-11 00:23:24,099 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 394 transitions. Word has length 16 [2022-02-11 00:23:24,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:23:24,099 INFO L470 AbstractCegarLoop]: Abstraction has 156 states and 394 transitions. [2022-02-11 00:23:24,099 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:23:24,100 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 394 transitions. [2022-02-11 00:23:24,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-02-11 00:23:24,100 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:23:24,100 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:23:24,116 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Ended with exit code 0 [2022-02-11 00:23:24,316 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2022-02-11 00:23:24,317 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:23:24,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:23:24,317 INFO L85 PathProgramCache]: Analyzing trace with hash -1541331633, now seen corresponding path program 52 times [2022-02-11 00:23:24,317 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:23:24,317 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1892261814] [2022-02-11 00:23:24,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:23:24,317 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:23:24,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:23:24,495 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:23:24,496 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:23:24,496 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1892261814] [2022-02-11 00:23:24,496 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1892261814] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:23:24,496 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [804539188] [2022-02-11 00:23:24,496 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-11 00:23:24,496 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:23:24,496 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:23:24,508 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) [2022-02-11 00:23:24,509 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2022-02-11 00:23:24,550 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-11 00:23:24,550 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:23:24,551 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-11 00:23:24,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:23:24,804 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 93 treesize of output 77 [2022-02-11 00:23:24,807 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 77 treesize of output 61 [2022-02-11 00:23:25,070 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:23:25,072 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:23:25,442 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-11 00:23:25,442 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 102 treesize of output 89 [2022-02-11 00:23:25,445 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 86 treesize of output 70 [2022-02-11 00:23:25,529 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:23:25,530 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [804539188] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:23:25,530 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:23:25,530 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 22 [2022-02-11 00:23:25,530 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [526026739] [2022-02-11 00:23:25,530 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:23:25,530 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-11 00:23:25,530 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:23:25,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-11 00:23:25,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=395, Unknown=0, NotChecked=0, Total=462 [2022-02-11 00:23:25,531 INFO L87 Difference]: Start difference. First operand 156 states and 394 transitions. Second operand has 22 states, 22 states have (on average 1.6363636363636365) internal successors, (36), 22 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) [2022-02-11 00:23:26,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:23:26,555 INFO L93 Difference]: Finished difference Result 299 states and 633 transitions. [2022-02-11 00:23:26,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-02-11 00:23:26,555 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.6363636363636365) internal successors, (36), 22 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 16 [2022-02-11 00:23:26,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:23:26,556 INFO L225 Difference]: With dead ends: 299 [2022-02-11 00:23:26,556 INFO L226 Difference]: Without dead ends: 270 [2022-02-11 00:23:26,556 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 254 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=201, Invalid=989, Unknown=0, NotChecked=0, Total=1190 [2022-02-11 00:23:26,556 INFO L934 BasicCegarLoop]: 15 mSDtfsCounter, 175 mSDsluCounter, 485 mSDsCounter, 0 mSdLazyCounter, 815 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 175 SdHoareTripleChecker+Valid, 288 SdHoareTripleChecker+Invalid, 884 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 815 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-11 00:23:26,557 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [175 Valid, 288 Invalid, 884 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 815 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-11 00:23:26,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270 states. [2022-02-11 00:23:26,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270 to 158. [2022-02-11 00:23:26,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 157 states have (on average 2.535031847133758) internal successors, (398), 157 states have internal predecessors, (398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:23:26,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 398 transitions. [2022-02-11 00:23:26,559 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 398 transitions. Word has length 16 [2022-02-11 00:23:26,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:23:26,560 INFO L470 AbstractCegarLoop]: Abstraction has 158 states and 398 transitions. [2022-02-11 00:23:26,560 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.6363636363636365) internal successors, (36), 22 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) [2022-02-11 00:23:26,560 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 398 transitions. [2022-02-11 00:23:26,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-02-11 00:23:26,560 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:23:26,560 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:23:26,579 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Forceful destruction successful, exit code 0 [2022-02-11 00:23:26,761 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,53 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:23:26,761 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:23:26,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:23:26,761 INFO L85 PathProgramCache]: Analyzing trace with hash -586030645, now seen corresponding path program 53 times [2022-02-11 00:23:26,761 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:23:26,761 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1761328980] [2022-02-11 00:23:26,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:23:26,762 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:23:26,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:23:26,995 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:23:26,995 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:23:26,995 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1761328980] [2022-02-11 00:23:26,995 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1761328980] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:23:26,995 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1917305596] [2022-02-11 00:23:26,996 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-11 00:23:26,996 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:23:26,996 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:23:26,997 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) [2022-02-11 00:23:26,998 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2022-02-11 00:23:27,029 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-11 00:23:27,030 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:23:27,030 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-11 00:23:27,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:23:27,363 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 61 [2022-02-11 00:23:27,365 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 49 [2022-02-11 00:23:27,462 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:23:27,463 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:23:27,726 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-11 00:23:27,726 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 124 treesize of output 107 [2022-02-11 00:23:27,730 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 104 treesize of output 84 [2022-02-11 00:23:27,836 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:23:27,836 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1917305596] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:23:27,836 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:23:27,836 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 22 [2022-02-11 00:23:27,836 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1821839033] [2022-02-11 00:23:27,836 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:23:27,836 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-11 00:23:27,836 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:23:27,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-11 00:23:27,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=388, Unknown=0, NotChecked=0, Total=462 [2022-02-11 00:23:27,837 INFO L87 Difference]: Start difference. First operand 158 states and 398 transitions. Second operand has 22 states, 22 states have (on average 1.6363636363636365) internal successors, (36), 22 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) [2022-02-11 00:23:28,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:23:28,478 INFO L93 Difference]: Finished difference Result 253 states and 560 transitions. [2022-02-11 00:23:28,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-02-11 00:23:28,478 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.6363636363636365) internal successors, (36), 22 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 16 [2022-02-11 00:23:28,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:23:28,479 INFO L225 Difference]: With dead ends: 253 [2022-02-11 00:23:28,479 INFO L226 Difference]: Without dead ends: 235 [2022-02-11 00:23:28,479 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=185, Invalid=745, Unknown=0, NotChecked=0, Total=930 [2022-02-11 00:23:28,479 INFO L934 BasicCegarLoop]: 9 mSDtfsCounter, 130 mSDsluCounter, 312 mSDsCounter, 0 mSdLazyCounter, 596 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 177 SdHoareTripleChecker+Invalid, 651 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 596 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-11 00:23:28,479 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [130 Valid, 177 Invalid, 651 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 596 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-11 00:23:28,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2022-02-11 00:23:28,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 161. [2022-02-11 00:23:28,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 160 states have (on average 2.55) internal successors, (408), 160 states have internal predecessors, (408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:23:28,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 408 transitions. [2022-02-11 00:23:28,482 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 408 transitions. Word has length 16 [2022-02-11 00:23:28,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:23:28,483 INFO L470 AbstractCegarLoop]: Abstraction has 161 states and 408 transitions. [2022-02-11 00:23:28,483 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.6363636363636365) internal successors, (36), 22 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) [2022-02-11 00:23:28,483 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 408 transitions. [2022-02-11 00:23:28,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-02-11 00:23:28,483 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:23:28,483 INFO L515 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:23:28,499 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Ended with exit code 0 [2022-02-11 00:23:28,683 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,54 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:23:28,684 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:23:28,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:23:28,684 INFO L85 PathProgramCache]: Analyzing trace with hash -854671771, now seen corresponding path program 54 times [2022-02-11 00:23:28,684 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:23:28,684 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2018856810] [2022-02-11 00:23:28,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:23:28,685 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:23:28,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:23:28,743 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:23:28,743 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:23:28,743 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2018856810] [2022-02-11 00:23:28,743 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2018856810] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:23:28,743 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1013842368] [2022-02-11 00:23:28,743 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-11 00:23:28,743 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:23:28,743 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:23:28,744 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) [2022-02-11 00:23:28,745 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2022-02-11 00:23:28,778 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-11 00:23:28,778 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:23:28,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 15 conjunts are in the unsatisfiable core [2022-02-11 00:23:28,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:23:28,869 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 98 treesize of output 82 [2022-02-11 00:23:28,871 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 82 treesize of output 66 [2022-02-11 00:23:28,932 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:23:28,932 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:23:29,009 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:23:29,010 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 63 treesize of output 59 [2022-02-11 00:23:29,016 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:23:29,017 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 51 treesize of output 47 [2022-02-11 00:23:29,116 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:23:29,117 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1013842368] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:23:29,117 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:23:29,117 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2022-02-11 00:23:29,117 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [403016934] [2022-02-11 00:23:29,117 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:23:29,117 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-02-11 00:23:29,117 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:23:29,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-02-11 00:23:29,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2022-02-11 00:23:29,117 INFO L87 Difference]: Start difference. First operand 161 states and 408 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:23:29,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:23:29,170 INFO L93 Difference]: Finished difference Result 160 states and 399 transitions. [2022-02-11 00:23:29,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-02-11 00:23:29,171 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have 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 [2022-02-11 00:23:29,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:23:29,171 INFO L225 Difference]: With dead ends: 160 [2022-02-11 00:23:29,171 INFO L226 Difference]: Without dead ends: 160 [2022-02-11 00:23:29,172 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2022-02-11 00:23:29,172 INFO L934 BasicCegarLoop]: 6 mSDtfsCounter, 17 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 130 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-11 00:23:29,172 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 35 Invalid, 134 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 130 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-11 00:23:29,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2022-02-11 00:23:29,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 150. [2022-02-11 00:23:29,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 149 states have (on average 2.557046979865772) internal successors, (381), 149 states have internal predecessors, (381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:23:29,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 381 transitions. [2022-02-11 00:23:29,174 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 381 transitions. Word has length 16 [2022-02-11 00:23:29,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:23:29,174 INFO L470 AbstractCegarLoop]: Abstraction has 150 states and 381 transitions. [2022-02-11 00:23:29,175 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:23:29,175 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 381 transitions. [2022-02-11 00:23:29,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-02-11 00:23:29,175 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:23:29,175 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:23:29,207 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Ended with exit code 0 [2022-02-11 00:23:29,394 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:23:29,394 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:23:29,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:23:29,394 INFO L85 PathProgramCache]: Analyzing trace with hash 1493263183, now seen corresponding path program 55 times [2022-02-11 00:23:29,394 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:23:29,394 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [408499473] [2022-02-11 00:23:29,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:23:29,395 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:23:29,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:23:29,576 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:23:29,576 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:23:29,576 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [408499473] [2022-02-11 00:23:29,576 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [408499473] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:23:29,576 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1864763793] [2022-02-11 00:23:29,576 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-11 00:23:29,576 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:23:29,577 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:23:29,577 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) [2022-02-11 00:23:29,578 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2022-02-11 00:23:29,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:23:29,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 33 conjunts are in the unsatisfiable core [2022-02-11 00:23:29,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:23:29,824 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 104 treesize of output 88 [2022-02-11 00:23:29,826 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 88 treesize of output 72 [2022-02-11 00:23:30,062 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:23:30,062 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:23:30,352 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-11 00:23:30,353 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 108 treesize of output 95 [2022-02-11 00:23:30,357 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 92 treesize of output 76 [2022-02-11 00:23:30,471 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:23:30,471 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1864763793] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:23:30,471 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:23:30,471 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 22 [2022-02-11 00:23:30,472 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [46792670] [2022-02-11 00:23:30,472 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:23:30,472 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-11 00:23:30,472 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:23:30,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-11 00:23:30,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=387, Unknown=0, NotChecked=0, Total=462 [2022-02-11 00:23:30,472 INFO L87 Difference]: Start difference. First operand 150 states and 381 transitions. Second operand has 22 states, 22 states have (on average 1.6363636363636365) internal successors, (36), 22 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) [2022-02-11 00:23:31,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:23:31,473 INFO L93 Difference]: Finished difference Result 305 states and 630 transitions. [2022-02-11 00:23:31,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-02-11 00:23:31,473 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.6363636363636365) internal successors, (36), 22 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 16 [2022-02-11 00:23:31,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:23:31,474 INFO L225 Difference]: With dead ends: 305 [2022-02-11 00:23:31,474 INFO L226 Difference]: Without dead ends: 265 [2022-02-11 00:23:31,474 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=212, Invalid=844, Unknown=0, NotChecked=0, Total=1056 [2022-02-11 00:23:31,474 INFO L934 BasicCegarLoop]: 15 mSDtfsCounter, 127 mSDsluCounter, 470 mSDsCounter, 0 mSdLazyCounter, 674 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 297 SdHoareTripleChecker+Invalid, 729 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 674 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-11 00:23:31,474 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [127 Valid, 297 Invalid, 729 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 674 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-11 00:23:31,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2022-02-11 00:23:31,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 152. [2022-02-11 00:23:31,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 151 states have (on average 2.556291390728477) internal successors, (386), 151 states have internal predecessors, (386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:23:31,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 386 transitions. [2022-02-11 00:23:31,477 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 386 transitions. Word has length 16 [2022-02-11 00:23:31,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:23:31,477 INFO L470 AbstractCegarLoop]: Abstraction has 152 states and 386 transitions. [2022-02-11 00:23:31,477 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.6363636363636365) internal successors, (36), 22 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) [2022-02-11 00:23:31,477 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 386 transitions. [2022-02-11 00:23:31,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-02-11 00:23:31,478 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:23:31,478 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:23:31,497 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Forceful destruction successful, exit code 0 [2022-02-11 00:23:31,690 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:23:31,690 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:23:31,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:23:31,691 INFO L85 PathProgramCache]: Analyzing trace with hash -655533353, now seen corresponding path program 56 times [2022-02-11 00:23:31,691 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:23:31,691 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1182119024] [2022-02-11 00:23:31,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:23:31,691 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:23:31,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:23:31,853 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:23:31,853 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:23:31,853 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1182119024] [2022-02-11 00:23:31,853 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1182119024] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:23:31,853 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1446067945] [2022-02-11 00:23:31,853 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-11 00:23:31,853 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:23:31,853 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:23:31,855 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) [2022-02-11 00:23:31,868 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2022-02-11 00:23:31,899 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-11 00:23:31,899 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:23:31,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 33 conjunts are in the unsatisfiable core [2022-02-11 00:23:31,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:23:32,116 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 99 treesize of output 83 [2022-02-11 00:23:32,129 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 83 treesize of output 67 [2022-02-11 00:23:32,383 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:23:32,384 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:23:32,747 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-11 00:23:32,747 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 103 treesize of output 90 [2022-02-11 00:23:32,751 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 87 treesize of output 71 [2022-02-11 00:23:32,870 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:23:32,870 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1446067945] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:23:32,870 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:23:32,870 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 22 [2022-02-11 00:23:32,870 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [927046805] [2022-02-11 00:23:32,870 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:23:32,870 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-11 00:23:32,871 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:23:32,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-11 00:23:32,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=387, Unknown=0, NotChecked=0, Total=462 [2022-02-11 00:23:32,871 INFO L87 Difference]: Start difference. First operand 152 states and 386 transitions. Second operand has 22 states, 22 states have (on average 1.6363636363636365) internal successors, (36), 22 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) [2022-02-11 00:23:34,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:23:34,203 INFO L93 Difference]: Finished difference Result 293 states and 617 transitions. [2022-02-11 00:23:34,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-02-11 00:23:34,204 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.6363636363636365) internal successors, (36), 22 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 16 [2022-02-11 00:23:34,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:23:34,204 INFO L225 Difference]: With dead ends: 293 [2022-02-11 00:23:34,204 INFO L226 Difference]: Without dead ends: 243 [2022-02-11 00:23:34,205 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 445 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=331, Invalid=1475, Unknown=0, NotChecked=0, Total=1806 [2022-02-11 00:23:34,205 INFO L934 BasicCegarLoop]: 12 mSDtfsCounter, 201 mSDsluCounter, 369 mSDsCounter, 0 mSdLazyCounter, 593 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 201 SdHoareTripleChecker+Valid, 219 SdHoareTripleChecker+Invalid, 683 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 593 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-11 00:23:34,205 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [201 Valid, 219 Invalid, 683 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 593 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-11 00:23:34,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2022-02-11 00:23:34,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 154. [2022-02-11 00:23:34,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 153 states have (on average 2.5555555555555554) internal successors, (391), 153 states have internal predecessors, (391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:23:34,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 391 transitions. [2022-02-11 00:23:34,208 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 391 transitions. Word has length 16 [2022-02-11 00:23:34,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:23:34,208 INFO L470 AbstractCegarLoop]: Abstraction has 154 states and 391 transitions. [2022-02-11 00:23:34,208 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.6363636363636365) internal successors, (36), 22 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) [2022-02-11 00:23:34,208 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 391 transitions. [2022-02-11 00:23:34,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-02-11 00:23:34,208 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:23:34,209 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:23:34,225 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Ended with exit code 0 [2022-02-11 00:23:34,421 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:23:34,421 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:23:34,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:23:34,422 INFO L85 PathProgramCache]: Analyzing trace with hash 1451250767, now seen corresponding path program 57 times [2022-02-11 00:23:34,422 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:23:34,422 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [680678548] [2022-02-11 00:23:34,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:23:34,422 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:23:34,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:23:34,580 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:23:34,581 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:23:34,581 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [680678548] [2022-02-11 00:23:34,581 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [680678548] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:23:34,581 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [504115072] [2022-02-11 00:23:34,581 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-11 00:23:34,581 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:23:34,581 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:23:34,582 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) [2022-02-11 00:23:34,582 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2022-02-11 00:23:34,618 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-11 00:23:34,618 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:23:34,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 33 conjunts are in the unsatisfiable core [2022-02-11 00:23:34,619 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:23:34,860 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 101 treesize of output 85 [2022-02-11 00:23:34,863 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 85 treesize of output 69 [2022-02-11 00:23:35,182 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:23:35,182 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:23:35,616 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-02-11 00:23:35,616 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 122 treesize of output 103 [2022-02-11 00:23:35,620 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 98 treesize of output 74 [2022-02-11 00:23:35,729 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:23:35,729 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [504115072] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:23:35,729 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:23:35,729 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2022-02-11 00:23:35,729 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [671158885] [2022-02-11 00:23:35,729 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:23:35,729 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-02-11 00:23:35,729 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:23:35,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-02-11 00:23:35,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=429, Unknown=0, NotChecked=0, Total=506 [2022-02-11 00:23:35,730 INFO L87 Difference]: Start difference. First operand 154 states and 391 transitions. Second operand has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 23 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) [2022-02-11 00:23:37,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:23:37,130 INFO L93 Difference]: Finished difference Result 339 states and 712 transitions. [2022-02-11 00:23:37,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-02-11 00:23:37,130 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 23 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 16 [2022-02-11 00:23:37,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:23:37,131 INFO L225 Difference]: With dead ends: 339 [2022-02-11 00:23:37,131 INFO L226 Difference]: Without dead ends: 283 [2022-02-11 00:23:37,131 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 439 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=434, Invalid=1546, Unknown=0, NotChecked=0, Total=1980 [2022-02-11 00:23:37,132 INFO L934 BasicCegarLoop]: 17 mSDtfsCounter, 168 mSDsluCounter, 516 mSDsCounter, 0 mSdLazyCounter, 809 mSolverCounterSat, 118 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 168 SdHoareTripleChecker+Valid, 302 SdHoareTripleChecker+Invalid, 927 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 118 IncrementalHoareTripleChecker+Valid, 809 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-11 00:23:37,132 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [168 Valid, 302 Invalid, 927 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [118 Valid, 809 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-11 00:23:37,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2022-02-11 00:23:37,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 157. [2022-02-11 00:23:37,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 156 states have (on average 2.5641025641025643) internal successors, (400), 156 states have internal predecessors, (400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:23:37,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 400 transitions. [2022-02-11 00:23:37,134 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 400 transitions. Word has length 16 [2022-02-11 00:23:37,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:23:37,135 INFO L470 AbstractCegarLoop]: Abstraction has 157 states and 400 transitions. [2022-02-11 00:23:37,135 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 23 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) [2022-02-11 00:23:37,135 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 400 transitions. [2022-02-11 00:23:37,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-02-11 00:23:37,135 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:23:37,135 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:23:37,153 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Forceful destruction successful, exit code 0 [2022-02-11 00:23:37,342 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2022-02-11 00:23:37,343 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:23:37,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:23:37,343 INFO L85 PathProgramCache]: Analyzing trace with hash 258940807, now seen corresponding path program 58 times [2022-02-11 00:23:37,343 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:23:37,343 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2124412256] [2022-02-11 00:23:37,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:23:37,343 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:23:37,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:23:37,638 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:23:37,638 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:23:37,638 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2124412256] [2022-02-11 00:23:37,639 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2124412256] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:23:37,639 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [831939546] [2022-02-11 00:23:37,639 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-11 00:23:37,639 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:23:37,639 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:23:37,640 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) [2022-02-11 00:23:37,641 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2022-02-11 00:23:37,674 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-11 00:23:37,675 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:23:37,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-11 00:23:37,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:23:37,999 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 57 [2022-02-11 00:23:38,001 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 45 [2022-02-11 00:23:38,092 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:23:38,092 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:23:38,341 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-11 00:23:38,342 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 124 treesize of output 107 [2022-02-11 00:23:38,345 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 104 treesize of output 84 [2022-02-11 00:23:38,455 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:23:38,455 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [831939546] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:23:38,455 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:23:38,455 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-02-11 00:23:38,455 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2046461621] [2022-02-11 00:23:38,455 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:23:38,456 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-11 00:23:38,456 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:23:38,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-11 00:23:38,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=386, Unknown=0, NotChecked=0, Total=462 [2022-02-11 00:23:38,456 INFO L87 Difference]: Start difference. First operand 157 states and 400 transitions. Second operand has 22 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:23:38,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:23:38,987 INFO L93 Difference]: Finished difference Result 268 states and 594 transitions. [2022-02-11 00:23:38,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-02-11 00:23:38,987 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-02-11 00:23:38,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:23:38,988 INFO L225 Difference]: With dead ends: 268 [2022-02-11 00:23:38,988 INFO L226 Difference]: Without dead ends: 250 [2022-02-11 00:23:38,988 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=157, Invalid=713, Unknown=0, NotChecked=0, Total=870 [2022-02-11 00:23:38,989 INFO L934 BasicCegarLoop]: 12 mSDtfsCounter, 131 mSDsluCounter, 407 mSDsCounter, 0 mSdLazyCounter, 663 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 223 SdHoareTripleChecker+Invalid, 708 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 663 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-11 00:23:38,989 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [131 Valid, 223 Invalid, 708 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 663 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-11 00:23:38,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2022-02-11 00:23:38,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 161. [2022-02-11 00:23:38,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 160 states have (on average 2.58125) internal successors, (413), 160 states have internal predecessors, (413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:23:38,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 413 transitions. [2022-02-11 00:23:38,991 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 413 transitions. Word has length 16 [2022-02-11 00:23:38,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:23:38,991 INFO L470 AbstractCegarLoop]: Abstraction has 161 states and 413 transitions. [2022-02-11 00:23:38,992 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:23:38,992 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 413 transitions. [2022-02-11 00:23:38,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-02-11 00:23:38,992 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:23:38,992 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:23:39,010 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Forceful destruction successful, exit code 0 [2022-02-11 00:23:39,192 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,SelfDestructingSolverStorable66 [2022-02-11 00:23:39,193 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:23:39,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:23:39,194 INFO L85 PathProgramCache]: Analyzing trace with hash -1956732661, now seen corresponding path program 59 times [2022-02-11 00:23:39,194 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:23:39,194 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1580583936] [2022-02-11 00:23:39,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:23:39,194 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:23:39,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:23:39,349 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:23:39,349 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:23:39,349 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1580583936] [2022-02-11 00:23:39,349 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1580583936] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:23:39,349 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2109024387] [2022-02-11 00:23:39,349 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-11 00:23:39,349 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:23:39,349 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:23:39,352 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) [2022-02-11 00:23:39,352 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2022-02-11 00:23:39,388 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-11 00:23:39,388 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:23:39,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-11 00:23:39,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:23:39,637 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 99 treesize of output 83 [2022-02-11 00:23:39,641 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 83 treesize of output 67 [2022-02-11 00:23:39,852 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:23:39,852 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:23:40,113 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-11 00:23:40,113 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 103 treesize of output 90 [2022-02-11 00:23:40,117 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 87 treesize of output 71 [2022-02-11 00:23:40,226 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:23:40,226 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2109024387] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:23:40,227 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:23:40,227 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-02-11 00:23:40,227 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638427822] [2022-02-11 00:23:40,227 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:23:40,227 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-11 00:23:40,227 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:23:40,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-11 00:23:40,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=392, Unknown=0, NotChecked=0, Total=462 [2022-02-11 00:23:40,227 INFO L87 Difference]: Start difference. First operand 161 states and 413 transitions. Second operand has 22 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:23:41,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:23:41,062 INFO L93 Difference]: Finished difference Result 335 states and 705 transitions. [2022-02-11 00:23:41,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-02-11 00:23:41,062 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-02-11 00:23:41,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:23:41,063 INFO L225 Difference]: With dead ends: 335 [2022-02-11 00:23:41,063 INFO L226 Difference]: Without dead ends: 302 [2022-02-11 00:23:41,064 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=199, Invalid=991, Unknown=0, NotChecked=0, Total=1190 [2022-02-11 00:23:41,064 INFO L934 BasicCegarLoop]: 14 mSDtfsCounter, 186 mSDsluCounter, 460 mSDsCounter, 0 mSdLazyCounter, 740 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 186 SdHoareTripleChecker+Valid, 264 SdHoareTripleChecker+Invalid, 810 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 740 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-11 00:23:41,064 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [186 Valid, 264 Invalid, 810 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 740 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-11 00:23:41,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 302 states. [2022-02-11 00:23:41,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 302 to 161. [2022-02-11 00:23:41,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 160 states have (on average 2.58125) internal successors, (413), 160 states have internal predecessors, (413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:23:41,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 413 transitions. [2022-02-11 00:23:41,067 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 413 transitions. Word has length 16 [2022-02-11 00:23:41,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:23:41,067 INFO L470 AbstractCegarLoop]: Abstraction has 161 states and 413 transitions. [2022-02-11 00:23:41,067 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:23:41,067 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 413 transitions. [2022-02-11 00:23:41,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-02-11 00:23:41,067 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:23:41,067 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:23:41,084 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Ended with exit code 0 [2022-02-11 00:23:41,268 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,SelfDestructingSolverStorable67 [2022-02-11 00:23:41,268 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:23:41,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:23:41,268 INFO L85 PathProgramCache]: Analyzing trace with hash 189438099, now seen corresponding path program 60 times [2022-02-11 00:23:41,268 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:23:41,268 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1652105931] [2022-02-11 00:23:41,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:23:41,269 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:23:41,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:23:41,423 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:23:41,424 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:23:41,424 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1652105931] [2022-02-11 00:23:41,424 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1652105931] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:23:41,424 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1320940181] [2022-02-11 00:23:41,424 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-11 00:23:41,424 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:23:41,424 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:23:41,426 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) [2022-02-11 00:23:41,426 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2022-02-11 00:23:41,459 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-11 00:23:41,459 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:23:41,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 33 conjunts are in the unsatisfiable core [2022-02-11 00:23:41,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:23:41,668 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 99 treesize of output 83 [2022-02-11 00:23:41,670 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 83 treesize of output 67 [2022-02-11 00:23:41,910 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:23:41,911 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:23:42,242 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-11 00:23:42,242 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 102 treesize of output 89 [2022-02-11 00:23:42,246 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 86 treesize of output 70 [2022-02-11 00:23:42,364 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:23:42,365 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1320940181] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:23:42,365 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:23:42,365 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-02-11 00:23:42,365 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203998044] [2022-02-11 00:23:42,365 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:23:42,365 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-11 00:23:42,365 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:23:42,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-11 00:23:42,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=389, Unknown=0, NotChecked=0, Total=462 [2022-02-11 00:23:42,365 INFO L87 Difference]: Start difference. First operand 161 states and 413 transitions. Second operand has 22 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:23:43,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:23:43,624 INFO L93 Difference]: Finished difference Result 321 states and 685 transitions. [2022-02-11 00:23:43,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-02-11 00:23:43,624 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-02-11 00:23:43,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:23:43,625 INFO L225 Difference]: With dead ends: 321 [2022-02-11 00:23:43,625 INFO L226 Difference]: Without dead ends: 278 [2022-02-11 00:23:43,625 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 397 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=312, Invalid=1494, Unknown=0, NotChecked=0, Total=1806 [2022-02-11 00:23:43,625 INFO L934 BasicCegarLoop]: 13 mSDtfsCounter, 213 mSDsluCounter, 411 mSDsCounter, 0 mSdLazyCounter, 618 mSolverCounterSat, 106 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 213 SdHoareTripleChecker+Valid, 225 SdHoareTripleChecker+Invalid, 724 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 106 IncrementalHoareTripleChecker+Valid, 618 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-11 00:23:43,625 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [213 Valid, 225 Invalid, 724 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [106 Valid, 618 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-11 00:23:43,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2022-02-11 00:23:43,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 163. [2022-02-11 00:23:43,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 162 states have (on average 2.580246913580247) internal successors, (418), 162 states have internal predecessors, (418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:23:43,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 418 transitions. [2022-02-11 00:23:43,629 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 418 transitions. Word has length 16 [2022-02-11 00:23:43,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:23:43,629 INFO L470 AbstractCegarLoop]: Abstraction has 163 states and 418 transitions. [2022-02-11 00:23:43,629 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:23:43,629 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 418 transitions. [2022-02-11 00:23:43,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-02-11 00:23:43,630 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:23:43,630 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:23:43,652 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Ended with exit code 0 [2022-02-11 00:23:43,839 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68,61 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:23:43,839 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:23:43,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:23:43,840 INFO L85 PathProgramCache]: Analyzing trace with hash -1998745077, now seen corresponding path program 61 times [2022-02-11 00:23:43,840 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:23:43,840 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [912405763] [2022-02-11 00:23:43,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:23:43,840 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:23:43,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:23:43,998 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:23:43,998 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:23:43,998 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [912405763] [2022-02-11 00:23:43,998 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [912405763] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:23:43,998 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1393413302] [2022-02-11 00:23:43,998 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-11 00:23:43,998 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:23:43,998 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:23:44,000 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) [2022-02-11 00:23:44,003 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2022-02-11 00:23:44,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:23:44,039 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-11 00:23:44,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:23:44,259 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 95 treesize of output 79 [2022-02-11 00:23:44,261 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 79 treesize of output 63 [2022-02-11 00:23:44,494 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:23:44,494 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:23:44,904 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-02-11 00:23:44,904 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 138 treesize of output 111 [2022-02-11 00:23:44,913 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 106 treesize of output 74 [2022-02-11 00:23:44,988 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:23:44,988 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1393413302] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:23:44,988 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:23:44,989 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-02-11 00:23:44,989 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1391627458] [2022-02-11 00:23:44,989 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:23:44,989 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-11 00:23:44,989 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:23:44,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-11 00:23:44,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=403, Unknown=0, NotChecked=0, Total=462 [2022-02-11 00:23:44,989 INFO L87 Difference]: Start difference. First operand 163 states and 418 transitions. Second operand has 22 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:23:46,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:23:46,614 INFO L93 Difference]: Finished difference Result 303 states and 665 transitions. [2022-02-11 00:23:46,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-02-11 00:23:46,614 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-02-11 00:23:46,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:23:46,615 INFO L225 Difference]: With dead ends: 303 [2022-02-11 00:23:46,615 INFO L226 Difference]: Without dead ends: 264 [2022-02-11 00:23:46,616 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 319 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=300, Invalid=1506, Unknown=0, NotChecked=0, Total=1806 [2022-02-11 00:23:46,616 INFO L934 BasicCegarLoop]: 19 mSDtfsCounter, 251 mSDsluCounter, 514 mSDsCounter, 0 mSdLazyCounter, 831 mSolverCounterSat, 117 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 251 SdHoareTripleChecker+Valid, 290 SdHoareTripleChecker+Invalid, 948 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 117 IncrementalHoareTripleChecker+Valid, 831 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-11 00:23:46,616 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [251 Valid, 290 Invalid, 948 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [117 Valid, 831 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-11 00:23:46,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2022-02-11 00:23:46,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 164. [2022-02-11 00:23:46,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 163 states have (on average 2.5828220858895707) internal successors, (421), 163 states have internal predecessors, (421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:23:46,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 421 transitions. [2022-02-11 00:23:46,619 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 421 transitions. Word has length 16 [2022-02-11 00:23:46,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:23:46,619 INFO L470 AbstractCegarLoop]: Abstraction has 164 states and 421 transitions. [2022-02-11 00:23:46,619 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:23:46,619 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 421 transitions. [2022-02-11 00:23:46,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-02-11 00:23:46,619 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:23:46,619 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:23:46,639 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Forceful destruction successful, exit code 0 [2022-02-11 00:23:46,825 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 62 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2022-02-11 00:23:46,826 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:23:46,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:23:46,831 INFO L85 PathProgramCache]: Analyzing trace with hash -1555845937, now seen corresponding path program 62 times [2022-02-11 00:23:46,831 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:23:46,831 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1141929470] [2022-02-11 00:23:46,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:23:46,832 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:23:46,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:23:46,991 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:23:46,991 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:23:46,991 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1141929470] [2022-02-11 00:23:46,991 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1141929470] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:23:46,992 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [754311369] [2022-02-11 00:23:46,992 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-11 00:23:46,992 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:23:46,992 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:23:46,993 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) [2022-02-11 00:23:46,994 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2022-02-11 00:23:47,027 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-11 00:23:47,027 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:23:47,028 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-11 00:23:47,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:23:47,262 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 93 treesize of output 77 [2022-02-11 00:23:47,264 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 77 treesize of output 61 [2022-02-11 00:23:47,480 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:23:47,480 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:23:47,879 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-11 00:23:47,879 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 81 treesize of output 72 [2022-02-11 00:23:47,882 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 57 [2022-02-11 00:23:47,892 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:23:47,892 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [754311369] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:23:47,892 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:23:47,892 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-02-11 00:23:47,892 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [764510970] [2022-02-11 00:23:47,892 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:23:47,892 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-11 00:23:47,893 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:23:47,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-11 00:23:47,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=405, Unknown=0, NotChecked=0, Total=462 [2022-02-11 00:23:47,893 INFO L87 Difference]: Start difference. First operand 164 states and 421 transitions. Second operand has 22 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:23:49,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:23:49,081 INFO L93 Difference]: Finished difference Result 280 states and 639 transitions. [2022-02-11 00:23:49,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-02-11 00:23:49,082 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-02-11 00:23:49,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:23:49,082 INFO L225 Difference]: With dead ends: 280 [2022-02-11 00:23:49,082 INFO L226 Difference]: Without dead ends: 240 [2022-02-11 00:23:49,083 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=238, Invalid=1168, Unknown=0, NotChecked=0, Total=1406 [2022-02-11 00:23:49,083 INFO L934 BasicCegarLoop]: 11 mSDtfsCounter, 163 mSDsluCounter, 423 mSDsCounter, 0 mSdLazyCounter, 693 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 163 SdHoareTripleChecker+Valid, 202 SdHoareTripleChecker+Invalid, 781 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 693 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-11 00:23:49,083 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [163 Valid, 202 Invalid, 781 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 693 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-11 00:23:49,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2022-02-11 00:23:49,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 169. [2022-02-11 00:23:49,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 168 states have (on average 2.5654761904761907) internal successors, (431), 168 states have internal predecessors, (431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:23:49,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 431 transitions. [2022-02-11 00:23:49,086 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 431 transitions. Word has length 16 [2022-02-11 00:23:49,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:23:49,086 INFO L470 AbstractCegarLoop]: Abstraction has 169 states and 431 transitions. [2022-02-11 00:23:49,086 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:23:49,086 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 431 transitions. [2022-02-11 00:23:49,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-11 00:23:49,086 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:23:49,086 INFO L515 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:23:49,103 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Ended with exit code 0 [2022-02-11 00:23:49,297 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,63 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:23:49,298 INFO L402 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:23:49,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:23:49,298 INFO L85 PathProgramCache]: Analyzing trace with hash 556564331, now seen corresponding path program 63 times [2022-02-11 00:23:49,298 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:23:49,298 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [503251042] [2022-02-11 00:23:49,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:23:49,298 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:23:49,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:23:49,367 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:23:49,367 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:23:49,367 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [503251042] [2022-02-11 00:23:49,367 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [503251042] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:23:49,367 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [29487920] [2022-02-11 00:23:49,367 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-11 00:23:49,368 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:23:49,368 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:23:49,369 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) [2022-02-11 00:23:49,370 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2022-02-11 00:23:49,418 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-11 00:23:49,418 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:23:49,419 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2022-02-11 00:23:49,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:23:49,561 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:23:49,561 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:23:49,695 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-11 00:23:49,695 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 30 treesize of output 25 [2022-02-11 00:23:49,707 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:23:49,707 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [29487920] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:23:49,707 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:23:49,707 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2022-02-11 00:23:49,707 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1625473346] [2022-02-11 00:23:49,707 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:23:49,707 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-11 00:23:49,707 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:23:49,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-11 00:23:49,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2022-02-11 00:23:49,708 INFO L87 Difference]: Start difference. First operand 169 states and 431 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:23:49,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:23:49,821 INFO L93 Difference]: Finished difference Result 224 states and 546 transitions. [2022-02-11 00:23:49,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-11 00:23:49,821 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-02-11 00:23:49,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:23:49,822 INFO L225 Difference]: With dead ends: 224 [2022-02-11 00:23:49,822 INFO L226 Difference]: Without dead ends: 224 [2022-02-11 00:23:49,822 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2022-02-11 00:23:49,822 INFO L934 BasicCegarLoop]: 14 mSDtfsCounter, 63 mSDsluCounter, 211 mSDsCounter, 0 mSdLazyCounter, 297 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 300 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 297 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-11 00:23:49,822 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 109 Invalid, 300 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 297 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-11 00:23:49,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2022-02-11 00:23:49,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 170. [2022-02-11 00:23:49,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 169 states have (on average 2.5680473372781063) internal successors, (434), 169 states have internal predecessors, (434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:23:49,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 434 transitions. [2022-02-11 00:23:49,825 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 434 transitions. Word has length 17 [2022-02-11 00:23:49,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:23:49,825 INFO L470 AbstractCegarLoop]: Abstraction has 170 states and 434 transitions. [2022-02-11 00:23:49,825 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:23:49,825 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 434 transitions. [2022-02-11 00:23:49,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-11 00:23:49,826 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:23:49,826 INFO L515 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:23:49,842 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Ended with exit code 0 [2022-02-11 00:23:50,042 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,64 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:23:50,042 INFO L402 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:23:50,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:23:50,042 INFO L85 PathProgramCache]: Analyzing trace with hash -1389135685, now seen corresponding path program 64 times [2022-02-11 00:23:50,042 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:23:50,042 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1013549697] [2022-02-11 00:23:50,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:23:50,042 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:23:50,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:23:50,127 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:23:50,127 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:23:50,127 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1013549697] [2022-02-11 00:23:50,127 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1013549697] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:23:50,127 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [732783413] [2022-02-11 00:23:50,127 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-11 00:23:50,127 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:23:50,127 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:23:50,128 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) [2022-02-11 00:23:50,132 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2022-02-11 00:23:50,165 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-11 00:23:50,166 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:23:50,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2022-02-11 00:23:50,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:23:50,357 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:23:50,357 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:23:50,527 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-11 00:23:50,528 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 30 treesize of output 25 [2022-02-11 00:23:50,546 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:23:50,546 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [732783413] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:23:50,547 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:23:50,547 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 21 [2022-02-11 00:23:50,547 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969240594] [2022-02-11 00:23:50,547 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:23:50,547 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-11 00:23:50,547 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:23:50,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-11 00:23:50,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=357, Unknown=0, NotChecked=0, Total=420 [2022-02-11 00:23:50,547 INFO L87 Difference]: Start difference. First operand 170 states and 434 transitions. Second operand has 21 states, 21 states have (on average 1.6666666666666667) internal successors, (35), 21 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:23:50,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:23:50,943 INFO L93 Difference]: Finished difference Result 241 states and 579 transitions. [2022-02-11 00:23:50,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-02-11 00:23:50,944 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.6666666666666667) internal successors, (35), 21 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-02-11 00:23:50,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:23:50,944 INFO L225 Difference]: With dead ends: 241 [2022-02-11 00:23:50,944 INFO L226 Difference]: Without dead ends: 241 [2022-02-11 00:23:50,945 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=145, Invalid=785, Unknown=0, NotChecked=0, Total=930 [2022-02-11 00:23:50,945 INFO L934 BasicCegarLoop]: 11 mSDtfsCounter, 81 mSDsluCounter, 205 mSDsCounter, 0 mSdLazyCounter, 365 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 408 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 365 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-11 00:23:50,945 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 120 Invalid, 408 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 365 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-11 00:23:50,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2022-02-11 00:23:50,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 170. [2022-02-11 00:23:50,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 169 states have (on average 2.5680473372781063) internal successors, (434), 169 states have internal predecessors, (434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:23:50,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 434 transitions. [2022-02-11 00:23:50,948 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 434 transitions. Word has length 17 [2022-02-11 00:23:50,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:23:50,948 INFO L470 AbstractCegarLoop]: Abstraction has 170 states and 434 transitions. [2022-02-11 00:23:50,948 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.6666666666666667) internal successors, (35), 21 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:23:50,948 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 434 transitions. [2022-02-11 00:23:50,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-11 00:23:50,948 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:23:50,948 INFO L515 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:23:50,964 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Ended with exit code 0 [2022-02-11 00:23:51,149 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,65 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:23:51,149 INFO L402 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:23:51,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:23:51,149 INFO L85 PathProgramCache]: Analyzing trace with hash 1503702455, now seen corresponding path program 65 times [2022-02-11 00:23:51,149 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:23:51,149 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1133505833] [2022-02-11 00:23:51,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:23:51,149 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:23:51,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:23:51,235 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:23:51,236 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:23:51,236 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1133505833] [2022-02-11 00:23:51,236 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1133505833] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:23:51,236 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1928675421] [2022-02-11 00:23:51,236 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-11 00:23:51,236 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:23:51,236 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:23:51,237 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) [2022-02-11 00:23:51,238 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2022-02-11 00:23:51,275 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-11 00:23:51,275 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:23:51,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2022-02-11 00:23:51,276 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:23:51,524 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 49 [2022-02-11 00:23:51,525 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 37 [2022-02-11 00:23:51,544 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:23:51,544 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:23:51,651 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-11 00:23:51,651 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 65 treesize of output 56 [2022-02-11 00:23:51,654 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 34 [2022-02-11 00:23:51,684 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:23:51,684 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1928675421] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:23:51,684 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:23:51,684 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2022-02-11 00:23:51,684 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [395668588] [2022-02-11 00:23:51,684 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:23:51,685 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-02-11 00:23:51,685 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:23:51,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-02-11 00:23:51,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2022-02-11 00:23:51,685 INFO L87 Difference]: Start difference. First operand 170 states and 434 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 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) [2022-02-11 00:23:52,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:23:52,005 INFO L93 Difference]: Finished difference Result 252 states and 587 transitions. [2022-02-11 00:23:52,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-11 00:23:52,005 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 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 17 [2022-02-11 00:23:52,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:23:52,006 INFO L225 Difference]: With dead ends: 252 [2022-02-11 00:23:52,006 INFO L226 Difference]: Without dead ends: 248 [2022-02-11 00:23:52,006 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=116, Invalid=346, Unknown=0, NotChecked=0, Total=462 [2022-02-11 00:23:52,006 INFO L934 BasicCegarLoop]: 12 mSDtfsCounter, 155 mSDsluCounter, 199 mSDsCounter, 0 mSdLazyCounter, 321 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 155 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 340 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 321 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-11 00:23:52,006 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [155 Valid, 116 Invalid, 340 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 321 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-11 00:23:52,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2022-02-11 00:23:52,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 178. [2022-02-11 00:23:52,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 177 states have (on average 2.553672316384181) internal successors, (452), 177 states have internal predecessors, (452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:23:52,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 452 transitions. [2022-02-11 00:23:52,009 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 452 transitions. Word has length 17 [2022-02-11 00:23:52,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:23:52,009 INFO L470 AbstractCegarLoop]: Abstraction has 178 states and 452 transitions. [2022-02-11 00:23:52,009 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 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) [2022-02-11 00:23:52,009 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 452 transitions. [2022-02-11 00:23:52,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-11 00:23:52,010 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:23:52,010 INFO L515 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:23:52,026 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Ended with exit code 0 [2022-02-11 00:23:52,219 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,SelfDestructingSolverStorable73 [2022-02-11 00:23:52,219 INFO L402 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:23:52,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:23:52,219 INFO L85 PathProgramCache]: Analyzing trace with hash 751247663, now seen corresponding path program 66 times [2022-02-11 00:23:52,220 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:23:52,220 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2146337668] [2022-02-11 00:23:52,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:23:52,220 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:23:52,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:23:52,306 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:23:52,307 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:23:52,307 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2146337668] [2022-02-11 00:23:52,307 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2146337668] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:23:52,307 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1391563785] [2022-02-11 00:23:52,307 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-11 00:23:52,307 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:23:52,307 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:23:52,308 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) [2022-02-11 00:23:52,308 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2022-02-11 00:23:52,343 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-11 00:23:52,344 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:23:52,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2022-02-11 00:23:52,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:23:52,567 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:23:52,567 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:23:52,744 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-11 00:23:52,744 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 30 treesize of output 25 [2022-02-11 00:23:52,751 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:23:52,751 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1391563785] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:23:52,751 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:23:52,751 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-02-11 00:23:52,751 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [715912842] [2022-02-11 00:23:52,751 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:23:52,751 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-11 00:23:52,751 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:23:52,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-11 00:23:52,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2022-02-11 00:23:52,752 INFO L87 Difference]: Start difference. First operand 178 states and 452 transitions. Second operand has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:23:52,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:23:52,971 INFO L93 Difference]: Finished difference Result 241 states and 582 transitions. [2022-02-11 00:23:52,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-11 00:23:52,971 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-02-11 00:23:52,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:23:52,972 INFO L225 Difference]: With dead ends: 241 [2022-02-11 00:23:52,972 INFO L226 Difference]: Without dead ends: 241 [2022-02-11 00:23:52,972 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2022-02-11 00:23:52,972 INFO L934 BasicCegarLoop]: 12 mSDtfsCounter, 37 mSDsluCounter, 239 mSDsCounter, 0 mSdLazyCounter, 413 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 422 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 413 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-11 00:23:52,972 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 141 Invalid, 422 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 413 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-11 00:23:52,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2022-02-11 00:23:52,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 178. [2022-02-11 00:23:52,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 177 states have (on average 2.553672316384181) internal successors, (452), 177 states have internal predecessors, (452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:23:52,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 452 transitions. [2022-02-11 00:23:52,975 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 452 transitions. Word has length 17 [2022-02-11 00:23:52,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:23:52,975 INFO L470 AbstractCegarLoop]: Abstraction has 178 states and 452 transitions. [2022-02-11 00:23:52,975 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:23:52,975 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 452 transitions. [2022-02-11 00:23:52,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-11 00:23:52,975 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:23:52,976 INFO L515 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:23:52,992 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Forceful destruction successful, exit code 0 [2022-02-11 00:23:53,192 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,SelfDestructingSolverStorable74 [2022-02-11 00:23:53,192 INFO L402 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:23:53,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:23:53,192 INFO L85 PathProgramCache]: Analyzing trace with hash 1537301683, now seen corresponding path program 67 times [2022-02-11 00:23:53,192 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:23:53,193 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1911219887] [2022-02-11 00:23:53,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:23:53,193 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:23:53,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:23:53,276 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:23:53,276 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:23:53,276 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1911219887] [2022-02-11 00:23:53,276 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1911219887] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:23:53,276 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1763942591] [2022-02-11 00:23:53,276 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-11 00:23:53,277 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:23:53,277 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:23:53,277 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) [2022-02-11 00:23:53,280 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2022-02-11 00:23:53,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:23:53,328 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2022-02-11 00:23:53,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:23:53,531 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 96 treesize of output 80 [2022-02-11 00:23:53,533 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 80 treesize of output 64 [2022-02-11 00:23:53,600 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:23:53,600 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:23:53,714 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-11 00:23:53,714 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 65 treesize of output 56 [2022-02-11 00:23:53,717 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 34 [2022-02-11 00:23:53,745 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:23:53,745 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1763942591] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:23:53,745 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:23:53,745 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-02-11 00:23:53,745 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [768496665] [2022-02-11 00:23:53,745 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:23:53,746 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-11 00:23:53,746 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:23:53,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-11 00:23:53,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2022-02-11 00:23:53,746 INFO L87 Difference]: Start difference. First operand 178 states and 452 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 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) [2022-02-11 00:23:54,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:23:54,029 INFO L93 Difference]: Finished difference Result 237 states and 565 transitions. [2022-02-11 00:23:54,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-11 00:23:54,030 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 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 17 [2022-02-11 00:23:54,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:23:54,030 INFO L225 Difference]: With dead ends: 237 [2022-02-11 00:23:54,030 INFO L226 Difference]: Without dead ends: 235 [2022-02-11 00:23:54,030 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=113, Invalid=349, Unknown=0, NotChecked=0, Total=462 [2022-02-11 00:23:54,031 INFO L934 BasicCegarLoop]: 11 mSDtfsCounter, 93 mSDsluCounter, 223 mSDsCounter, 0 mSdLazyCounter, 346 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 360 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 346 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-11 00:23:54,031 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [93 Valid, 114 Invalid, 360 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 346 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-11 00:23:54,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2022-02-11 00:23:54,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 174. [2022-02-11 00:23:54,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 173 states have (on average 2.560693641618497) internal successors, (443), 173 states have internal predecessors, (443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:23:54,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 443 transitions. [2022-02-11 00:23:54,033 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 443 transitions. Word has length 17 [2022-02-11 00:23:54,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:23:54,034 INFO L470 AbstractCegarLoop]: Abstraction has 174 states and 443 transitions. [2022-02-11 00:23:54,034 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 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) [2022-02-11 00:23:54,034 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 443 transitions. [2022-02-11 00:23:54,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-11 00:23:54,034 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:23:54,034 INFO L515 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:23:54,050 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Ended with exit code 0 [2022-02-11 00:23:54,234 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable75 [2022-02-11 00:23:54,235 INFO L402 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:23:54,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:23:54,235 INFO L85 PathProgramCache]: Analyzing trace with hash 681744955, now seen corresponding path program 68 times [2022-02-11 00:23:54,235 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:23:54,235 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1466667100] [2022-02-11 00:23:54,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:23:54,235 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:23:54,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:23:54,333 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:23:54,334 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:23:54,334 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1466667100] [2022-02-11 00:23:54,334 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1466667100] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:23:54,334 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [919531374] [2022-02-11 00:23:54,334 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-11 00:23:54,334 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:23:54,334 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:23:54,335 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) [2022-02-11 00:23:54,336 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2022-02-11 00:23:54,373 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-11 00:23:54,373 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:23:54,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2022-02-11 00:23:54,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:23:54,596 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 73 [2022-02-11 00:23:54,598 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 57 [2022-02-11 00:23:54,688 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:23:54,688 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:23:54,855 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-11 00:23:54,855 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 30 treesize of output 25 [2022-02-11 00:23:54,864 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:23:54,864 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [919531374] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:23:54,864 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:23:54,864 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-02-11 00:23:54,864 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [736702036] [2022-02-11 00:23:54,864 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:23:54,864 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-11 00:23:54,864 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:23:54,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-11 00:23:54,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2022-02-11 00:23:54,865 INFO L87 Difference]: Start difference. First operand 174 states and 443 transitions. Second operand has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:23:55,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:23:55,134 INFO L93 Difference]: Finished difference Result 237 states and 569 transitions. [2022-02-11 00:23:55,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-02-11 00:23:55,135 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-02-11 00:23:55,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:23:55,135 INFO L225 Difference]: With dead ends: 237 [2022-02-11 00:23:55,135 INFO L226 Difference]: Without dead ends: 234 [2022-02-11 00:23:55,136 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=103, Invalid=449, Unknown=0, NotChecked=0, Total=552 [2022-02-11 00:23:55,136 INFO L934 BasicCegarLoop]: 12 mSDtfsCounter, 62 mSDsluCounter, 219 mSDsCounter, 0 mSdLazyCounter, 392 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 413 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 392 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-11 00:23:55,139 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 135 Invalid, 413 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 392 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-11 00:23:55,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2022-02-11 00:23:55,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 174. [2022-02-11 00:23:55,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 173 states have (on average 2.554913294797688) internal successors, (442), 173 states have internal predecessors, (442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:23:55,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 442 transitions. [2022-02-11 00:23:55,142 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 442 transitions. Word has length 17 [2022-02-11 00:23:55,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:23:55,143 INFO L470 AbstractCegarLoop]: Abstraction has 174 states and 442 transitions. [2022-02-11 00:23:55,143 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:23:55,143 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 442 transitions. [2022-02-11 00:23:55,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-11 00:23:55,143 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:23:55,143 INFO L515 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:23:55,161 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Forceful destruction successful, exit code 0 [2022-02-11 00:23:55,359 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,SelfDestructingSolverStorable76 [2022-02-11 00:23:55,359 INFO L402 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:23:55,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:23:55,360 INFO L85 PathProgramCache]: Analyzing trace with hash -678371785, now seen corresponding path program 69 times [2022-02-11 00:23:55,360 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:23:55,360 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1412366094] [2022-02-11 00:23:55,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:23:55,360 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:23:55,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:23:55,493 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:23:55,494 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:23:55,494 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1412366094] [2022-02-11 00:23:55,494 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1412366094] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:23:55,494 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [217135576] [2022-02-11 00:23:55,494 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-11 00:23:55,494 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:23:55,494 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:23:55,508 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) [2022-02-11 00:23:55,509 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Waiting until timeout for monitored process [2022-02-11 00:23:55,549 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-11 00:23:55,549 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:23:55,550 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2022-02-11 00:23:55,550 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:23:55,794 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 96 treesize of output 80 [2022-02-11 00:23:55,796 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 80 treesize of output 64 [2022-02-11 00:23:55,874 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:23:55,874 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:23:56,006 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-11 00:23:56,006 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 65 treesize of output 56 [2022-02-11 00:23:56,009 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 34 [2022-02-11 00:23:56,048 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:23:56,048 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [217135576] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:23:56,048 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:23:56,048 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2022-02-11 00:23:56,049 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1697934013] [2022-02-11 00:23:56,049 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:23:56,049 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-11 00:23:56,049 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:23:56,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-11 00:23:56,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=302, Unknown=0, NotChecked=0, Total=380 [2022-02-11 00:23:56,052 INFO L87 Difference]: Start difference. First operand 174 states and 442 transitions. Second operand has 20 states, 20 states have (on average 1.5) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:23:56,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:23:56,264 INFO L93 Difference]: Finished difference Result 221 states and 540 transitions. [2022-02-11 00:23:56,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-11 00:23:56,265 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.5) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-02-11 00:23:56,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:23:56,266 INFO L225 Difference]: With dead ends: 221 [2022-02-11 00:23:56,266 INFO L226 Difference]: Without dead ends: 221 [2022-02-11 00:23:56,266 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=109, Invalid=397, Unknown=0, NotChecked=0, Total=506 [2022-02-11 00:23:56,266 INFO L934 BasicCegarLoop]: 12 mSDtfsCounter, 58 mSDsluCounter, 188 mSDsCounter, 0 mSdLazyCounter, 309 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 318 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 309 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-11 00:23:56,266 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 96 Invalid, 318 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 309 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-11 00:23:56,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2022-02-11 00:23:56,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 171. [2022-02-11 00:23:56,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 170 states have (on average 2.5588235294117645) internal successors, (435), 170 states have internal predecessors, (435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:23:56,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 435 transitions. [2022-02-11 00:23:56,269 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 435 transitions. Word has length 17 [2022-02-11 00:23:56,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:23:56,269 INFO L470 AbstractCegarLoop]: Abstraction has 171 states and 435 transitions. [2022-02-11 00:23:56,269 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.5) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:23:56,269 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 435 transitions. [2022-02-11 00:23:56,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-11 00:23:56,269 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:23:56,269 INFO L515 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:23:56,296 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Ended with exit code 0 [2022-02-11 00:23:56,486 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77,70 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:23:56,486 INFO L402 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:23:56,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:23:56,486 INFO L85 PathProgramCache]: Analyzing trace with hash -1036295569, now seen corresponding path program 70 times [2022-02-11 00:23:56,486 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:23:56,486 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [149324252] [2022-02-11 00:23:56,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:23:56,486 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:23:56,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:23:56,570 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:23:56,570 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:23:56,570 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [149324252] [2022-02-11 00:23:56,570 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [149324252] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:23:56,570 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1914133381] [2022-02-11 00:23:56,570 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-11 00:23:56,570 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:23:56,571 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:23:56,572 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) [2022-02-11 00:23:56,599 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process [2022-02-11 00:23:56,620 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-11 00:23:56,620 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:23:56,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2022-02-11 00:23:56,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:23:56,794 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:23:56,795 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:23:56,938 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:23:56,938 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 42 treesize of output 40 [2022-02-11 00:23:56,944 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:23:56,944 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 30 treesize of output 28 [2022-02-11 00:23:56,998 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:23:56,998 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1914133381] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:23:56,998 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:23:56,999 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 21 [2022-02-11 00:23:56,999 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2012572526] [2022-02-11 00:23:56,999 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:23:56,999 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-11 00:23:56,999 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:23:56,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-11 00:23:56,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=360, Unknown=0, NotChecked=0, Total=420 [2022-02-11 00:23:56,999 INFO L87 Difference]: Start difference. First operand 171 states and 435 transitions. Second operand has 21 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 21 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:23:57,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:23:57,211 INFO L93 Difference]: Finished difference Result 201 states and 491 transitions. [2022-02-11 00:23:57,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-11 00:23:57,211 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 21 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-02-11 00:23:57,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:23:57,212 INFO L225 Difference]: With dead ends: 201 [2022-02-11 00:23:57,212 INFO L226 Difference]: Without dead ends: 201 [2022-02-11 00:23:57,212 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=92, Invalid=508, Unknown=0, NotChecked=0, Total=600 [2022-02-11 00:23:57,212 INFO L934 BasicCegarLoop]: 8 mSDtfsCounter, 32 mSDsluCounter, 193 mSDsCounter, 0 mSdLazyCounter, 336 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 343 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 336 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-11 00:23:57,212 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 105 Invalid, 343 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 336 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-11 00:23:57,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2022-02-11 00:23:57,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 171. [2022-02-11 00:23:57,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 170 states have (on average 2.5588235294117645) internal successors, (435), 170 states have internal predecessors, (435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:23:57,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 435 transitions. [2022-02-11 00:23:57,215 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 435 transitions. Word has length 17 [2022-02-11 00:23:57,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:23:57,215 INFO L470 AbstractCegarLoop]: Abstraction has 171 states and 435 transitions. [2022-02-11 00:23:57,215 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 21 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:23:57,215 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 435 transitions. [2022-02-11 00:23:57,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-11 00:23:57,215 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:23:57,215 INFO L515 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:23:57,232 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Ended with exit code 0 [2022-02-11 00:23:57,427 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78,71 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:23:57,427 INFO L402 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:23:57,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:23:57,428 INFO L85 PathProgramCache]: Analyzing trace with hash 1070488551, now seen corresponding path program 71 times [2022-02-11 00:23:57,428 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:23:57,428 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [722092977] [2022-02-11 00:23:57,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:23:57,428 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:23:57,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:23:57,548 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:23:57,548 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:23:57,548 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [722092977] [2022-02-11 00:23:57,548 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [722092977] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:23:57,548 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [311692320] [2022-02-11 00:23:57,548 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-11 00:23:57,549 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:23:57,549 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:23:57,549 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) [2022-02-11 00:23:57,550 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Waiting until timeout for monitored process [2022-02-11 00:23:57,591 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-11 00:23:57,591 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:23:57,592 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2022-02-11 00:23:57,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:23:57,790 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:23:57,791 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:23:57,930 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:23:57,930 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 41 treesize of output 39 [2022-02-11 00:23:57,935 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:23:57,935 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 29 treesize of output 27 [2022-02-11 00:23:57,997 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:23:57,997 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [311692320] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:23:57,997 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:23:57,997 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2022-02-11 00:23:57,997 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1136535141] [2022-02-11 00:23:57,997 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:23:57,997 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-11 00:23:57,997 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:23:57,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-11 00:23:57,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=320, Unknown=0, NotChecked=0, Total=380 [2022-02-11 00:23:57,998 INFO L87 Difference]: Start difference. First operand 171 states and 435 transitions. Second operand has 20 states, 20 states have (on average 1.6) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:23:58,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:23:58,124 INFO L93 Difference]: Finished difference Result 201 states and 491 transitions. [2022-02-11 00:23:58,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-11 00:23:58,124 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.6) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-02-11 00:23:58,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:23:58,125 INFO L225 Difference]: With dead ends: 201 [2022-02-11 00:23:58,125 INFO L226 Difference]: Without dead ends: 201 [2022-02-11 00:23:58,125 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=60, Invalid=320, Unknown=0, NotChecked=0, Total=380 [2022-02-11 00:23:58,125 INFO L934 BasicCegarLoop]: 10 mSDtfsCounter, 30 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 318 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 326 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 318 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-11 00:23:58,125 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 104 Invalid, 326 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 318 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-11 00:23:58,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2022-02-11 00:23:58,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 170. [2022-02-11 00:23:58,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 169 states have (on average 2.5562130177514795) internal successors, (432), 169 states have internal predecessors, (432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:23:58,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 432 transitions. [2022-02-11 00:23:58,128 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 432 transitions. Word has length 17 [2022-02-11 00:23:58,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:23:58,128 INFO L470 AbstractCegarLoop]: Abstraction has 170 states and 432 transitions. [2022-02-11 00:23:58,128 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.6) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:23:58,128 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 432 transitions. [2022-02-11 00:23:58,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-11 00:23:58,128 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:23:58,128 INFO L515 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:23:58,146 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Forceful destruction successful, exit code 0 [2022-02-11 00:23:58,343 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2022-02-11 00:23:58,343 INFO L402 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:23:58,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:23:58,344 INFO L85 PathProgramCache]: Analyzing trace with hash -1078307985, now seen corresponding path program 72 times [2022-02-11 00:23:58,344 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:23:58,344 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [954848700] [2022-02-11 00:23:58,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:23:58,344 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:23:58,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:23:58,460 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:23:58,460 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:23:58,460 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [954848700] [2022-02-11 00:23:58,460 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [954848700] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:23:58,460 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [115623745] [2022-02-11 00:23:58,460 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-11 00:23:58,460 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:23:58,461 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:23:58,461 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) [2022-02-11 00:23:58,462 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Waiting until timeout for monitored process [2022-02-11 00:23:58,499 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-02-11 00:23:58,499 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:23:58,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2022-02-11 00:23:58,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:23:58,688 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 73 [2022-02-11 00:23:58,691 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 57 [2022-02-11 00:23:58,768 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:23:58,768 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:23:58,915 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:23:58,915 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 42 treesize of output 40 [2022-02-11 00:23:58,920 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:23:58,920 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 30 treesize of output 28 [2022-02-11 00:23:58,962 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:23:58,963 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [115623745] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:23:58,963 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:23:58,963 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2022-02-11 00:23:58,963 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120662736] [2022-02-11 00:23:58,963 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:23:58,963 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-11 00:23:58,963 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:23:58,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-11 00:23:58,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2022-02-11 00:23:58,963 INFO L87 Difference]: Start difference. First operand 170 states and 432 transitions. Second operand has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:23:59,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:23:59,110 INFO L93 Difference]: Finished difference Result 203 states and 490 transitions. [2022-02-11 00:23:59,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-11 00:23:59,110 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-02-11 00:23:59,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:23:59,111 INFO L225 Difference]: With dead ends: 203 [2022-02-11 00:23:59,111 INFO L226 Difference]: Without dead ends: 200 [2022-02-11 00:23:59,111 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2022-02-11 00:23:59,112 INFO L934 BasicCegarLoop]: 11 mSDtfsCounter, 41 mSDsluCounter, 141 mSDsCounter, 0 mSdLazyCounter, 274 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 296 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 274 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-11 00:23:59,112 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 92 Invalid, 296 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 274 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-11 00:23:59,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2022-02-11 00:23:59,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 170. [2022-02-11 00:23:59,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 169 states have (on average 2.5502958579881656) internal successors, (431), 169 states have internal predecessors, (431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:23:59,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 431 transitions. [2022-02-11 00:23:59,114 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 431 transitions. Word has length 17 [2022-02-11 00:23:59,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:23:59,114 INFO L470 AbstractCegarLoop]: Abstraction has 170 states and 431 transitions. [2022-02-11 00:23:59,114 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:23:59,114 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 431 transitions. [2022-02-11 00:23:59,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-11 00:23:59,115 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:23:59,115 INFO L515 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:23:59,133 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Forceful destruction successful, exit code 0 [2022-02-11 00:23:59,315 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,73 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:23:59,315 INFO L402 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:23:59,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:23:59,316 INFO L85 PathProgramCache]: Analyzing trace with hash 1856542571, now seen corresponding path program 73 times [2022-02-11 00:23:59,316 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:23:59,316 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [198508104] [2022-02-11 00:23:59,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:23:59,316 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:23:59,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:23:59,408 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:23:59,408 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:23:59,409 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [198508104] [2022-02-11 00:23:59,409 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [198508104] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:23:59,409 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [683424852] [2022-02-11 00:23:59,409 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-11 00:23:59,409 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:23:59,409 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:23:59,410 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) [2022-02-11 00:23:59,410 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Waiting until timeout for monitored process [2022-02-11 00:23:59,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:23:59,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2022-02-11 00:23:59,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:23:59,641 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 96 treesize of output 80 [2022-02-11 00:23:59,643 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 80 treesize of output 64 [2022-02-11 00:23:59,701 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:23:59,702 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:23:59,811 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:23:59,811 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 73 treesize of output 67 [2022-02-11 00:23:59,818 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:23:59,818 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 57 treesize of output 51 [2022-02-11 00:23:59,902 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:23:59,902 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [683424852] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:23:59,902 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:23:59,902 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2022-02-11 00:23:59,902 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [539393425] [2022-02-11 00:23:59,902 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:23:59,902 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-11 00:23:59,902 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:23:59,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-11 00:23:59,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2022-02-11 00:23:59,903 INFO L87 Difference]: Start difference. First operand 170 states and 431 transitions. Second operand has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 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) [2022-02-11 00:24:00,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:24:00,021 INFO L93 Difference]: Finished difference Result 189 states and 462 transitions. [2022-02-11 00:24:00,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-11 00:24:00,021 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 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 17 [2022-02-11 00:24:00,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:24:00,022 INFO L225 Difference]: With dead ends: 189 [2022-02-11 00:24:00,022 INFO L226 Difference]: Without dead ends: 187 [2022-02-11 00:24:00,022 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=79, Invalid=301, Unknown=0, NotChecked=0, Total=380 [2022-02-11 00:24:00,022 INFO L934 BasicCegarLoop]: 8 mSDtfsCounter, 28 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 273 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 282 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 273 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-11 00:24:00,022 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 71 Invalid, 282 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 273 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-11 00:24:00,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2022-02-11 00:24:00,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 166. [2022-02-11 00:24:00,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 165 states have (on average 2.5454545454545454) internal successors, (420), 165 states have internal predecessors, (420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:24:00,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 420 transitions. [2022-02-11 00:24:00,025 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 420 transitions. Word has length 17 [2022-02-11 00:24:00,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:24:00,025 INFO L470 AbstractCegarLoop]: Abstraction has 166 states and 420 transitions. [2022-02-11 00:24:00,025 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 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) [2022-02-11 00:24:00,025 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 420 transitions. [2022-02-11 00:24:00,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-11 00:24:00,026 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:24:00,026 INFO L515 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:24:00,042 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Ended with exit code 0 [2022-02-11 00:24:00,226 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,74 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:24:00,226 INFO L402 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:24:00,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:24:00,227 INFO L85 PathProgramCache]: Analyzing trace with hash 1971747627, now seen corresponding path program 74 times [2022-02-11 00:24:00,227 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:24:00,227 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1313130699] [2022-02-11 00:24:00,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:24:00,227 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:24:00,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:24:00,352 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:24:00,352 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:24:00,352 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1313130699] [2022-02-11 00:24:00,352 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1313130699] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:24:00,352 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1553060617] [2022-02-11 00:24:00,352 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-11 00:24:00,352 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:24:00,353 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:24:00,353 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) [2022-02-11 00:24:00,354 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Waiting until timeout for monitored process [2022-02-11 00:24:00,390 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-11 00:24:00,390 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:24:00,390 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2022-02-11 00:24:00,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:24:00,580 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:24:00,580 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:24:00,692 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:24:00,692 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 34 treesize of output 34 [2022-02-11 00:24:00,697 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:24:00,697 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 26 treesize of output 26 [2022-02-11 00:24:00,767 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:24:00,767 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1553060617] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:24:00,767 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:24:00,767 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2022-02-11 00:24:00,767 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2011302198] [2022-02-11 00:24:00,767 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:24:00,767 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-11 00:24:00,767 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:24:00,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-11 00:24:00,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2022-02-11 00:24:00,768 INFO L87 Difference]: Start difference. First operand 166 states and 420 transitions. Second operand has 20 states, 20 states have (on average 1.5) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:24:01,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:24:01,079 INFO L93 Difference]: Finished difference Result 236 states and 557 transitions. [2022-02-11 00:24:01,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-02-11 00:24:01,079 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.5) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-02-11 00:24:01,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:24:01,080 INFO L225 Difference]: With dead ends: 236 [2022-02-11 00:24:01,080 INFO L226 Difference]: Without dead ends: 236 [2022-02-11 00:24:01,080 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=106, Invalid=494, Unknown=0, NotChecked=0, Total=600 [2022-02-11 00:24:01,080 INFO L934 BasicCegarLoop]: 14 mSDtfsCounter, 66 mSDsluCounter, 218 mSDsCounter, 0 mSdLazyCounter, 433 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 455 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 433 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-11 00:24:01,080 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 140 Invalid, 455 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 433 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-11 00:24:01,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2022-02-11 00:24:01,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 168. [2022-02-11 00:24:01,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 167 states have (on average 2.562874251497006) internal successors, (428), 167 states have internal predecessors, (428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:24:01,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 428 transitions. [2022-02-11 00:24:01,083 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 428 transitions. Word has length 17 [2022-02-11 00:24:01,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:24:01,083 INFO L470 AbstractCegarLoop]: Abstraction has 168 states and 428 transitions. [2022-02-11 00:24:01,083 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.5) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:24:01,083 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 428 transitions. [2022-02-11 00:24:01,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-11 00:24:01,084 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:24:01,084 INFO L515 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:24:01,100 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Forceful destruction successful, exit code 0 [2022-02-11 00:24:01,300 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,75 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:24:01,300 INFO L402 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:24:01,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:24:01,300 INFO L85 PathProgramCache]: Analyzing trace with hash -1552626445, now seen corresponding path program 75 times [2022-02-11 00:24:01,300 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:24:01,300 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [316369496] [2022-02-11 00:24:01,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:24:01,300 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:24:01,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:24:01,414 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:24:01,415 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:24:01,415 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [316369496] [2022-02-11 00:24:01,415 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [316369496] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:24:01,415 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [56657144] [2022-02-11 00:24:01,415 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-11 00:24:01,415 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:24:01,415 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:24:01,416 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) [2022-02-11 00:24:01,417 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Waiting until timeout for monitored process [2022-02-11 00:24:01,460 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-11 00:24:01,460 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:24:01,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 27 conjunts are in the unsatisfiable core [2022-02-11 00:24:01,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:24:01,723 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 99 treesize of output 83 [2022-02-11 00:24:01,731 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 83 treesize of output 67 [2022-02-11 00:24:01,809 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:24:01,809 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:24:01,905 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:24:01,906 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 65 treesize of output 61 [2022-02-11 00:24:01,913 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:24:01,914 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 53 treesize of output 49 [2022-02-11 00:24:02,035 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:24:02,035 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [56657144] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:24:02,035 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:24:02,035 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2022-02-11 00:24:02,035 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1104615495] [2022-02-11 00:24:02,035 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:24:02,036 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-11 00:24:02,036 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:24:02,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-11 00:24:02,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2022-02-11 00:24:02,036 INFO L87 Difference]: Start difference. First operand 168 states and 428 transitions. Second operand has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 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) [2022-02-11 00:24:02,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:24:02,560 INFO L93 Difference]: Finished difference Result 254 states and 582 transitions. [2022-02-11 00:24:02,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-02-11 00:24:02,560 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 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 17 [2022-02-11 00:24:02,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:24:02,561 INFO L225 Difference]: With dead ends: 254 [2022-02-11 00:24:02,561 INFO L226 Difference]: Without dead ends: 248 [2022-02-11 00:24:02,561 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=171, Invalid=759, Unknown=0, NotChecked=0, Total=930 [2022-02-11 00:24:02,562 INFO L934 BasicCegarLoop]: 16 mSDtfsCounter, 103 mSDsluCounter, 297 mSDsCounter, 0 mSdLazyCounter, 512 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 186 SdHoareTripleChecker+Invalid, 559 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 512 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-11 00:24:02,562 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [103 Valid, 186 Invalid, 559 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 512 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-11 00:24:02,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2022-02-11 00:24:02,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 172. [2022-02-11 00:24:02,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 171 states have (on average 2.56140350877193) internal successors, (438), 171 states have internal predecessors, (438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:24:02,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 438 transitions. [2022-02-11 00:24:02,564 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 438 transitions. Word has length 17 [2022-02-11 00:24:02,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:24:02,564 INFO L470 AbstractCegarLoop]: Abstraction has 172 states and 438 transitions. [2022-02-11 00:24:02,565 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 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) [2022-02-11 00:24:02,565 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 438 transitions. [2022-02-11 00:24:02,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-11 00:24:02,565 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:24:02,565 INFO L515 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:24:02,581 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Ended with exit code 0 [2022-02-11 00:24:02,768 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,SelfDestructingSolverStorable83 [2022-02-11 00:24:02,769 INFO L402 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:24:02,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:24:02,769 INFO L85 PathProgramCache]: Analyzing trace with hash 569618471, now seen corresponding path program 76 times [2022-02-11 00:24:02,769 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:24:02,769 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [83996015] [2022-02-11 00:24:02,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:24:02,769 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:24:02,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:24:02,881 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:24:02,881 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:24:02,881 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [83996015] [2022-02-11 00:24:02,881 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [83996015] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:24:02,881 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1252029856] [2022-02-11 00:24:02,881 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-11 00:24:02,881 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:24:02,882 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:24:02,882 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) [2022-02-11 00:24:02,883 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Waiting until timeout for monitored process [2022-02-11 00:24:02,921 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-11 00:24:02,921 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:24:02,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 25 conjunts are in the unsatisfiable core [2022-02-11 00:24:02,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:24:03,125 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 103 treesize of output 83 [2022-02-11 00:24:03,127 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 55 [2022-02-11 00:24:03,191 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:24:03,191 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:24:03,340 INFO L353 Elim1Store]: treesize reduction 10, result has 65.5 percent of original size [2022-02-11 00:24:03,341 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 56 treesize of output 58 [2022-02-11 00:24:03,344 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:24:03,350 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:24:03,350 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 40 treesize of output 42 [2022-02-11 00:24:03,458 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:24:03,458 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1252029856] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:24:03,458 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:24:03,458 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 21 [2022-02-11 00:24:03,458 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511586319] [2022-02-11 00:24:03,458 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:24:03,459 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-11 00:24:03,459 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:24:03,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-11 00:24:03,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2022-02-11 00:24:03,459 INFO L87 Difference]: Start difference. First operand 172 states and 438 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:24:03,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:24:03,827 INFO L93 Difference]: Finished difference Result 264 states and 614 transitions. [2022-02-11 00:24:03,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-02-11 00:24:03,827 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-02-11 00:24:03,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:24:03,828 INFO L225 Difference]: With dead ends: 264 [2022-02-11 00:24:03,828 INFO L226 Difference]: Without dead ends: 264 [2022-02-11 00:24:03,828 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=144, Invalid=668, Unknown=0, NotChecked=0, Total=812 [2022-02-11 00:24:03,828 INFO L934 BasicCegarLoop]: 15 mSDtfsCounter, 127 mSDsluCounter, 224 mSDsCounter, 0 mSdLazyCounter, 379 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 410 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 379 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-11 00:24:03,828 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [127 Valid, 128 Invalid, 410 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 379 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-11 00:24:03,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2022-02-11 00:24:03,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 176. [2022-02-11 00:24:03,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 175 states have (on average 2.5828571428571427) internal successors, (452), 175 states have internal predecessors, (452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:24:03,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 452 transitions. [2022-02-11 00:24:03,831 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 452 transitions. Word has length 17 [2022-02-11 00:24:03,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:24:03,831 INFO L470 AbstractCegarLoop]: Abstraction has 176 states and 452 transitions. [2022-02-11 00:24:03,831 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:24:03,831 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 452 transitions. [2022-02-11 00:24:03,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-11 00:24:03,832 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:24:03,832 INFO L515 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:24:03,849 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Forceful destruction successful, exit code 0 [2022-02-11 00:24:04,032 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,77 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:24:04,032 INFO L402 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:24:04,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:24:04,033 INFO L85 PathProgramCache]: Analyzing trace with hash -1579178065, now seen corresponding path program 77 times [2022-02-11 00:24:04,033 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:24:04,033 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [361351002] [2022-02-11 00:24:04,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:24:04,033 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:24:04,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:24:04,133 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:24:04,134 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:24:04,134 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [361351002] [2022-02-11 00:24:04,134 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [361351002] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:24:04,134 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [5127456] [2022-02-11 00:24:04,134 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-11 00:24:04,134 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:24:04,134 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:24:04,135 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) [2022-02-11 00:24:04,135 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Waiting until timeout for monitored process [2022-02-11 00:24:04,174 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-02-11 00:24:04,174 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:24:04,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2022-02-11 00:24:04,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:24:04,362 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:24:04,362 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:24:04,477 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:24:04,477 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 33 treesize of output 33 [2022-02-11 00:24:04,482 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:24:04,482 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 25 treesize of output 25 [2022-02-11 00:24:04,553 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:24:04,553 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [5127456] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:24:04,553 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:24:04,553 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2022-02-11 00:24:04,553 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1276963820] [2022-02-11 00:24:04,553 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:24:04,554 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-11 00:24:04,554 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:24:04,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-11 00:24:04,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2022-02-11 00:24:04,554 INFO L87 Difference]: Start difference. First operand 176 states and 452 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:24:04,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:24:04,784 INFO L93 Difference]: Finished difference Result 233 states and 569 transitions. [2022-02-11 00:24:04,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-02-11 00:24:04,785 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-02-11 00:24:04,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:24:04,786 INFO L225 Difference]: With dead ends: 233 [2022-02-11 00:24:04,786 INFO L226 Difference]: Without dead ends: 233 [2022-02-11 00:24:04,786 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2022-02-11 00:24:04,786 INFO L934 BasicCegarLoop]: 9 mSDtfsCounter, 45 mSDsluCounter, 214 mSDsCounter, 0 mSdLazyCounter, 407 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 418 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 407 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-11 00:24:04,786 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 101 Invalid, 418 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 407 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-11 00:24:04,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2022-02-11 00:24:04,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 175. [2022-02-11 00:24:04,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 174 states have (on average 2.574712643678161) internal successors, (448), 174 states have internal predecessors, (448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:24:04,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 448 transitions. [2022-02-11 00:24:04,789 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 448 transitions. Word has length 17 [2022-02-11 00:24:04,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:24:04,789 INFO L470 AbstractCegarLoop]: Abstraction has 175 states and 448 transitions. [2022-02-11 00:24:04,789 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:24:04,789 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 448 transitions. [2022-02-11 00:24:04,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-11 00:24:04,789 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:24:04,789 INFO L515 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:24:04,806 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Forceful destruction successful, exit code 0 [2022-02-11 00:24:04,994 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,78 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:24:04,994 INFO L402 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:24:04,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:24:04,995 INFO L85 PathProgramCache]: Analyzing trace with hash 236638139, now seen corresponding path program 78 times [2022-02-11 00:24:04,995 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:24:04,995 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1413211463] [2022-02-11 00:24:04,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:24:04,995 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:24:04,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:24:05,080 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:24:05,080 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:24:05,080 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1413211463] [2022-02-11 00:24:05,080 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1413211463] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:24:05,080 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2043181312] [2022-02-11 00:24:05,080 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-11 00:24:05,080 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:24:05,080 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:24:05,081 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) [2022-02-11 00:24:05,082 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Waiting until timeout for monitored process [2022-02-11 00:24:05,119 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-11 00:24:05,119 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:24:05,119 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2022-02-11 00:24:05,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:24:05,299 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:24:05,300 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:24:05,466 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:24:05,467 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 42 treesize of output 40 [2022-02-11 00:24:05,482 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:24:05,482 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 30 treesize of output 28 [2022-02-11 00:24:05,548 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:24:05,548 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2043181312] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:24:05,548 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:24:05,548 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 21 [2022-02-11 00:24:05,548 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [813072394] [2022-02-11 00:24:05,549 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:24:05,549 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-11 00:24:05,549 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:24:05,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-11 00:24:05,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2022-02-11 00:24:05,549 INFO L87 Difference]: Start difference. First operand 175 states and 448 transitions. Second operand has 21 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 21 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:24:05,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:24:05,763 INFO L93 Difference]: Finished difference Result 209 states and 512 transitions. [2022-02-11 00:24:05,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-11 00:24:05,764 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 21 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-02-11 00:24:05,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:24:05,764 INFO L225 Difference]: With dead ends: 209 [2022-02-11 00:24:05,764 INFO L226 Difference]: Without dead ends: 209 [2022-02-11 00:24:05,765 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=76, Invalid=476, Unknown=0, NotChecked=0, Total=552 [2022-02-11 00:24:05,765 INFO L934 BasicCegarLoop]: 8 mSDtfsCounter, 26 mSDsluCounter, 156 mSDsCounter, 0 mSdLazyCounter, 320 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 324 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 320 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-11 00:24:05,765 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 95 Invalid, 324 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 320 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-11 00:24:05,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2022-02-11 00:24:05,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 174. [2022-02-11 00:24:05,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 173 states have (on average 2.5722543352601157) internal successors, (445), 173 states have internal predecessors, (445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:24:05,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 445 transitions. [2022-02-11 00:24:05,767 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 445 transitions. Word has length 17 [2022-02-11 00:24:05,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:24:05,768 INFO L470 AbstractCegarLoop]: Abstraction has 174 states and 445 transitions. [2022-02-11 00:24:05,768 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 21 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:24:05,768 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 445 transitions. [2022-02-11 00:24:05,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-11 00:24:05,768 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:24:05,768 INFO L515 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:24:05,784 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Ended with exit code 0 [2022-02-11 00:24:05,979 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,79 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:24:05,980 INFO L402 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:24:05,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:24:05,980 INFO L85 PathProgramCache]: Analyzing trace with hash -1951545037, now seen corresponding path program 79 times [2022-02-11 00:24:05,981 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:24:05,981 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1309886234] [2022-02-11 00:24:05,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:24:05,981 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:24:05,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:24:06,089 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:24:06,089 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:24:06,089 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1309886234] [2022-02-11 00:24:06,089 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1309886234] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:24:06,089 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [847601605] [2022-02-11 00:24:06,089 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-11 00:24:06,089 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:24:06,090 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:24:06,091 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) [2022-02-11 00:24:06,092 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Waiting until timeout for monitored process [2022-02-11 00:24:06,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:24:06,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2022-02-11 00:24:06,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:24:06,360 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:24:06,361 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:24:06,500 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:24:06,500 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 41 treesize of output 39 [2022-02-11 00:24:06,505 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:24:06,505 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 29 treesize of output 27 [2022-02-11 00:24:06,557 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:24:06,558 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [847601605] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:24:06,558 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:24:06,558 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2022-02-11 00:24:06,558 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1251739824] [2022-02-11 00:24:06,558 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:24:06,558 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-11 00:24:06,558 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:24:06,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-11 00:24:06,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2022-02-11 00:24:06,558 INFO L87 Difference]: Start difference. First operand 174 states and 445 transitions. Second operand has 20 states, 20 states have (on average 1.6) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:24:06,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:24:06,972 INFO L93 Difference]: Finished difference Result 221 states and 539 transitions. [2022-02-11 00:24:06,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-02-11 00:24:06,973 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.6) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-02-11 00:24:06,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:24:06,973 INFO L225 Difference]: With dead ends: 221 [2022-02-11 00:24:06,973 INFO L226 Difference]: Without dead ends: 221 [2022-02-11 00:24:06,974 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=146, Invalid=784, Unknown=0, NotChecked=0, Total=930 [2022-02-11 00:24:06,974 INFO L934 BasicCegarLoop]: 8 mSDtfsCounter, 30 mSDsluCounter, 166 mSDsCounter, 0 mSdLazyCounter, 337 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 357 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 337 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-11 00:24:06,974 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 108 Invalid, 357 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 337 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-11 00:24:06,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2022-02-11 00:24:06,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 175. [2022-02-11 00:24:06,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 174 states have (on average 2.574712643678161) internal successors, (448), 174 states have internal predecessors, (448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:24:06,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 448 transitions. [2022-02-11 00:24:06,977 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 448 transitions. Word has length 17 [2022-02-11 00:24:06,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:24:06,977 INFO L470 AbstractCegarLoop]: Abstraction has 175 states and 448 transitions. [2022-02-11 00:24:06,977 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.6) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:24:06,977 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 448 transitions. [2022-02-11 00:24:06,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-11 00:24:06,977 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:24:06,977 INFO L515 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:24:06,994 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Ended with exit code 0 [2022-02-11 00:24:07,177 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,SelfDestructingSolverStorable87 [2022-02-11 00:24:07,178 INFO L402 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:24:07,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:24:07,178 INFO L85 PathProgramCache]: Analyzing trace with hash 194625723, now seen corresponding path program 80 times [2022-02-11 00:24:07,178 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:24:07,179 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [310861919] [2022-02-11 00:24:07,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:24:07,179 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:24:07,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:24:07,278 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:24:07,278 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:24:07,278 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [310861919] [2022-02-11 00:24:07,278 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [310861919] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:24:07,278 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1040041969] [2022-02-11 00:24:07,278 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-11 00:24:07,278 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:24:07,278 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:24:07,279 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) [2022-02-11 00:24:07,280 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Waiting until timeout for monitored process [2022-02-11 00:24:07,316 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-11 00:24:07,316 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:24:07,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2022-02-11 00:24:07,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:24:07,495 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 73 [2022-02-11 00:24:07,497 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 57 [2022-02-11 00:24:07,567 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:24:07,567 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:24:07,702 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:24:07,702 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 41 treesize of output 39 [2022-02-11 00:24:07,707 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:24:07,707 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 29 treesize of output 27 [2022-02-11 00:24:07,763 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:24:07,763 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1040041969] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:24:07,763 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:24:07,763 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2022-02-11 00:24:07,764 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [318887275] [2022-02-11 00:24:07,764 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:24:07,764 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-11 00:24:07,764 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:24:07,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-11 00:24:07,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2022-02-11 00:24:07,764 INFO L87 Difference]: Start difference. First operand 175 states and 448 transitions. Second operand has 20 states, 20 states have (on average 1.6) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:24:08,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:24:08,267 INFO L93 Difference]: Finished difference Result 236 states and 559 transitions. [2022-02-11 00:24:08,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-02-11 00:24:08,267 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.6) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-02-11 00:24:08,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:24:08,268 INFO L225 Difference]: With dead ends: 236 [2022-02-11 00:24:08,268 INFO L226 Difference]: Without dead ends: 236 [2022-02-11 00:24:08,268 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=153, Invalid=839, Unknown=0, NotChecked=0, Total=992 [2022-02-11 00:24:08,268 INFO L934 BasicCegarLoop]: 13 mSDtfsCounter, 86 mSDsluCounter, 170 mSDsCounter, 0 mSdLazyCounter, 367 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 412 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 367 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-11 00:24:08,268 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [86 Valid, 125 Invalid, 412 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 367 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-11 00:24:08,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2022-02-11 00:24:08,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 179. [2022-02-11 00:24:08,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 178 states have (on average 2.556179775280899) internal successors, (455), 178 states have internal predecessors, (455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:24:08,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 455 transitions. [2022-02-11 00:24:08,271 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 455 transitions. Word has length 17 [2022-02-11 00:24:08,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:24:08,271 INFO L470 AbstractCegarLoop]: Abstraction has 179 states and 455 transitions. [2022-02-11 00:24:08,271 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.6) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:24:08,271 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 455 transitions. [2022-02-11 00:24:08,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-11 00:24:08,271 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:24:08,271 INFO L515 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:24:08,287 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Ended with exit code 0 [2022-02-11 00:24:08,487 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable88 [2022-02-11 00:24:08,487 INFO L402 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:24:08,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:24:08,488 INFO L85 PathProgramCache]: Analyzing trace with hash -1150030221, now seen corresponding path program 81 times [2022-02-11 00:24:08,488 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:24:08,488 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1360723126] [2022-02-11 00:24:08,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:24:08,488 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:24:08,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:24:08,622 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:24:08,622 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:24:08,622 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1360723126] [2022-02-11 00:24:08,622 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1360723126] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:24:08,622 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [908904798] [2022-02-11 00:24:08,622 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-11 00:24:08,622 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:24:08,622 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:24:08,623 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) [2022-02-11 00:24:08,624 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Waiting until timeout for monitored process [2022-02-11 00:24:08,662 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-02-11 00:24:08,662 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:24:08,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2022-02-11 00:24:08,663 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:24:08,852 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 96 treesize of output 80 [2022-02-11 00:24:08,854 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 80 treesize of output 64 [2022-02-11 00:24:08,918 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:24:08,918 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:24:09,025 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:24:09,025 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 73 treesize of output 67 [2022-02-11 00:24:09,031 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:24:09,032 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 57 treesize of output 51 [2022-02-11 00:24:09,143 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:24:09,143 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [908904798] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:24:09,143 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:24:09,144 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2022-02-11 00:24:09,144 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [416656697] [2022-02-11 00:24:09,144 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:24:09,144 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-11 00:24:09,144 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:24:09,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-11 00:24:09,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2022-02-11 00:24:09,144 INFO L87 Difference]: Start difference. First operand 179 states and 455 transitions. Second operand has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:24:09,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:24:09,390 INFO L93 Difference]: Finished difference Result 250 states and 566 transitions. [2022-02-11 00:24:09,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-02-11 00:24:09,390 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-02-11 00:24:09,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:24:09,391 INFO L225 Difference]: With dead ends: 250 [2022-02-11 00:24:09,391 INFO L226 Difference]: Without dead ends: 248 [2022-02-11 00:24:09,391 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=101, Invalid=451, Unknown=0, NotChecked=0, Total=552 [2022-02-11 00:24:09,392 INFO L934 BasicCegarLoop]: 21 mSDtfsCounter, 77 mSDsluCounter, 296 mSDsCounter, 0 mSdLazyCounter, 362 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 223 SdHoareTripleChecker+Invalid, 388 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 362 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-11 00:24:09,392 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 223 Invalid, 388 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 362 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-11 00:24:09,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2022-02-11 00:24:09,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 175. [2022-02-11 00:24:09,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 174 states have (on average 2.5517241379310347) internal successors, (444), 174 states have internal predecessors, (444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:24:09,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 444 transitions. [2022-02-11 00:24:09,394 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 444 transitions. Word has length 17 [2022-02-11 00:24:09,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:24:09,394 INFO L470 AbstractCegarLoop]: Abstraction has 175 states and 444 transitions. [2022-02-11 00:24:09,394 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:24:09,394 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 444 transitions. [2022-02-11 00:24:09,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-11 00:24:09,395 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:24:09,395 INFO L515 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:24:09,412 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Ended with exit code 0 [2022-02-11 00:24:09,595 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 82 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable89 [2022-02-11 00:24:09,595 INFO L402 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:24:09,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:24:09,595 INFO L85 PathProgramCache]: Analyzing trace with hash 1842552179, now seen corresponding path program 82 times [2022-02-11 00:24:09,596 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:24:09,596 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1266802198] [2022-02-11 00:24:09,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:24:09,596 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:24:09,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:24:09,714 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:24:09,714 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:24:09,714 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1266802198] [2022-02-11 00:24:09,714 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1266802198] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:24:09,715 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1866435602] [2022-02-11 00:24:09,715 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-11 00:24:09,715 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:24:09,715 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:24:09,716 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) [2022-02-11 00:24:09,716 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Waiting until timeout for monitored process [2022-02-11 00:24:09,774 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-11 00:24:09,774 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:24:09,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2022-02-11 00:24:09,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:24:09,934 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 87 treesize of output 71 [2022-02-11 00:24:09,936 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 55 [2022-02-11 00:24:10,010 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:24:10,010 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:24:10,124 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:24:10,124 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 33 treesize of output 33 [2022-02-11 00:24:10,129 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:24:10,129 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 25 treesize of output 25 [2022-02-11 00:24:10,218 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:24:10,218 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1866435602] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:24:10,218 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:24:10,218 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2022-02-11 00:24:10,218 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1217030346] [2022-02-11 00:24:10,218 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:24:10,218 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-11 00:24:10,218 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:24:10,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-11 00:24:10,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2022-02-11 00:24:10,219 INFO L87 Difference]: Start difference. First operand 175 states and 444 transitions. Second operand has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:24:10,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:24:10,409 INFO L93 Difference]: Finished difference Result 241 states and 571 transitions. [2022-02-11 00:24:10,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-02-11 00:24:10,410 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-02-11 00:24:10,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:24:10,411 INFO L225 Difference]: With dead ends: 241 [2022-02-11 00:24:10,411 INFO L226 Difference]: Without dead ends: 239 [2022-02-11 00:24:10,411 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=80, Invalid=382, Unknown=0, NotChecked=0, Total=462 [2022-02-11 00:24:10,411 INFO L934 BasicCegarLoop]: 11 mSDtfsCounter, 66 mSDsluCounter, 208 mSDsCounter, 0 mSdLazyCounter, 404 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 426 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 404 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-11 00:24:10,411 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 122 Invalid, 426 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 404 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-11 00:24:10,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2022-02-11 00:24:10,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 174. [2022-02-11 00:24:10,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 173 states have (on average 2.560693641618497) internal successors, (443), 173 states have internal predecessors, (443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:24:10,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 443 transitions. [2022-02-11 00:24:10,417 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 443 transitions. Word has length 17 [2022-02-11 00:24:10,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:24:10,417 INFO L470 AbstractCegarLoop]: Abstraction has 174 states and 443 transitions. [2022-02-11 00:24:10,417 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:24:10,417 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 443 transitions. [2022-02-11 00:24:10,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-11 00:24:10,418 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:24:10,418 INFO L515 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:24:10,435 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Forceful destruction successful, exit code 0 [2022-02-11 00:24:10,618 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,83 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:24:10,618 INFO L402 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:24:10,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:24:10,619 INFO L85 PathProgramCache]: Analyzing trace with hash 639656943, now seen corresponding path program 83 times [2022-02-11 00:24:10,619 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:24:10,619 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1476468036] [2022-02-11 00:24:10,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:24:10,619 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:24:10,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:24:10,738 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:24:10,739 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:24:10,739 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1476468036] [2022-02-11 00:24:10,739 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1476468036] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:24:10,739 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1190690497] [2022-02-11 00:24:10,739 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-11 00:24:10,739 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:24:10,739 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:24:10,740 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) [2022-02-11 00:24:10,740 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Waiting until timeout for monitored process [2022-02-11 00:24:10,778 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-11 00:24:10,778 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:24:10,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2022-02-11 00:24:10,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:24:10,964 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:24:10,965 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:24:11,087 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:24:11,087 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 34 treesize of output 34 [2022-02-11 00:24:11,092 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:24:11,092 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 26 treesize of output 26 [2022-02-11 00:24:11,167 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:24:11,167 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1190690497] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:24:11,167 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:24:11,167 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2022-02-11 00:24:11,167 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [749892013] [2022-02-11 00:24:11,167 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:24:11,167 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-11 00:24:11,167 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:24:11,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-11 00:24:11,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2022-02-11 00:24:11,168 INFO L87 Difference]: Start difference. First operand 174 states and 443 transitions. Second operand has 20 states, 20 states have (on average 1.5) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:24:11,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:24:11,388 INFO L93 Difference]: Finished difference Result 230 states and 550 transitions. [2022-02-11 00:24:11,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-02-11 00:24:11,388 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.5) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-02-11 00:24:11,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:24:11,389 INFO L225 Difference]: With dead ends: 230 [2022-02-11 00:24:11,389 INFO L226 Difference]: Without dead ends: 230 [2022-02-11 00:24:11,389 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=86, Invalid=376, Unknown=0, NotChecked=0, Total=462 [2022-02-11 00:24:11,389 INFO L934 BasicCegarLoop]: 13 mSDtfsCounter, 70 mSDsluCounter, 196 mSDsCounter, 0 mSdLazyCounter, 421 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 438 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 421 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-11 00:24:11,390 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 132 Invalid, 438 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 421 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-11 00:24:11,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2022-02-11 00:24:11,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 175. [2022-02-11 00:24:11,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 174 states have (on average 2.574712643678161) internal successors, (448), 174 states have internal predecessors, (448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:24:11,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 448 transitions. [2022-02-11 00:24:11,392 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 448 transitions. Word has length 17 [2022-02-11 00:24:11,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:24:11,392 INFO L470 AbstractCegarLoop]: Abstraction has 175 states and 448 transitions. [2022-02-11 00:24:11,392 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.5) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:24:11,392 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 448 transitions. [2022-02-11 00:24:11,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-11 00:24:11,393 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:24:11,393 INFO L515 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:24:11,409 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Ended with exit code 0 [2022-02-11 00:24:11,603 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,84 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:24:11,603 INFO L402 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:24:11,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:24:11,603 INFO L85 PathProgramCache]: Analyzing trace with hash 1425710963, now seen corresponding path program 84 times [2022-02-11 00:24:11,604 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:24:11,604 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1016805242] [2022-02-11 00:24:11,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:24:11,604 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:24:11,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:24:11,716 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:24:11,716 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:24:11,717 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1016805242] [2022-02-11 00:24:11,717 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1016805242] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:24:11,717 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [292545834] [2022-02-11 00:24:11,717 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-11 00:24:11,717 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:24:11,717 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:24:11,718 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) [2022-02-11 00:24:11,718 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Waiting until timeout for monitored process [2022-02-11 00:24:11,756 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-11 00:24:11,757 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:24:11,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 25 conjunts are in the unsatisfiable core [2022-02-11 00:24:11,758 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:24:11,944 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 96 treesize of output 80 [2022-02-11 00:24:11,945 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 80 treesize of output 64 [2022-02-11 00:24:12,011 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:24:12,012 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:24:12,105 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:24:12,106 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 65 treesize of output 61 [2022-02-11 00:24:12,113 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:24:12,113 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 53 treesize of output 49 [2022-02-11 00:24:12,288 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:24:12,288 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [292545834] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:24:12,288 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:24:12,288 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2022-02-11 00:24:12,289 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [565360827] [2022-02-11 00:24:12,289 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:24:12,289 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-11 00:24:12,289 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:24:12,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-11 00:24:12,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2022-02-11 00:24:12,289 INFO L87 Difference]: Start difference. First operand 175 states and 448 transitions. Second operand has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:24:12,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:24:12,447 INFO L93 Difference]: Finished difference Result 229 states and 538 transitions. [2022-02-11 00:24:12,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-02-11 00:24:12,448 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-02-11 00:24:12,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:24:12,448 INFO L225 Difference]: With dead ends: 229 [2022-02-11 00:24:12,449 INFO L226 Difference]: Without dead ends: 227 [2022-02-11 00:24:12,449 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=82, Invalid=338, Unknown=0, NotChecked=0, Total=420 [2022-02-11 00:24:12,449 INFO L934 BasicCegarLoop]: 15 mSDtfsCounter, 79 mSDsluCounter, 201 mSDsCounter, 0 mSdLazyCounter, 348 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 363 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 348 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-11 00:24:12,449 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [79 Valid, 140 Invalid, 363 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 348 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-11 00:24:12,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2022-02-11 00:24:12,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 174. [2022-02-11 00:24:12,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 173 states have (on average 2.566473988439306) internal successors, (444), 173 states have internal predecessors, (444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:24:12,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 444 transitions. [2022-02-11 00:24:12,451 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 444 transitions. Word has length 17 [2022-02-11 00:24:12,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:24:12,451 INFO L470 AbstractCegarLoop]: Abstraction has 174 states and 444 transitions. [2022-02-11 00:24:12,452 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:24:12,452 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 444 transitions. [2022-02-11 00:24:12,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-11 00:24:12,452 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:24:12,452 INFO L515 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:24:12,468 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Ended with exit code 0 [2022-02-11 00:24:12,659 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,85 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:24:12,659 INFO L402 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:24:12,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:24:12,660 INFO L85 PathProgramCache]: Analyzing trace with hash -762472213, now seen corresponding path program 85 times [2022-02-11 00:24:12,660 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:24:12,660 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1455990634] [2022-02-11 00:24:12,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:24:12,660 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:24:12,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:24:12,791 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:24:12,791 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:24:12,791 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1455990634] [2022-02-11 00:24:12,791 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1455990634] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:24:12,791 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1027401067] [2022-02-11 00:24:12,791 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-11 00:24:12,791 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:24:12,792 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:24:12,793 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) [2022-02-11 00:24:12,794 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Waiting until timeout for monitored process [2022-02-11 00:24:12,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:24:12,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2022-02-11 00:24:12,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:24:13,028 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 73 [2022-02-11 00:24:13,031 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 57 [2022-02-11 00:24:13,105 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:24:13,105 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:24:13,216 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:24:13,216 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 34 treesize of output 34 [2022-02-11 00:24:13,221 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:24:13,221 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 26 treesize of output 26 [2022-02-11 00:24:13,293 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:24:13,294 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1027401067] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:24:13,294 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:24:13,294 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2022-02-11 00:24:13,294 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463072726] [2022-02-11 00:24:13,294 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:24:13,294 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-11 00:24:13,294 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:24:13,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-11 00:24:13,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=318, Unknown=0, NotChecked=0, Total=380 [2022-02-11 00:24:13,294 INFO L87 Difference]: Start difference. First operand 174 states and 444 transitions. Second operand has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:24:13,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:24:13,767 INFO L93 Difference]: Finished difference Result 251 states and 607 transitions. [2022-02-11 00:24:13,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-02-11 00:24:13,767 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-02-11 00:24:13,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:24:13,768 INFO L225 Difference]: With dead ends: 251 [2022-02-11 00:24:13,768 INFO L226 Difference]: Without dead ends: 249 [2022-02-11 00:24:13,769 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=177, Invalid=815, Unknown=0, NotChecked=0, Total=992 [2022-02-11 00:24:13,769 INFO L934 BasicCegarLoop]: 9 mSDtfsCounter, 91 mSDsluCounter, 195 mSDsCounter, 0 mSdLazyCounter, 407 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 455 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 407 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-11 00:24:13,769 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [91 Valid, 112 Invalid, 455 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 407 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-11 00:24:13,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2022-02-11 00:24:13,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 184. [2022-02-11 00:24:13,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 183 states have (on average 2.5737704918032787) internal successors, (471), 183 states have internal predecessors, (471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:24:13,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 471 transitions. [2022-02-11 00:24:13,772 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 471 transitions. Word has length 17 [2022-02-11 00:24:13,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:24:13,772 INFO L470 AbstractCegarLoop]: Abstraction has 184 states and 471 transitions. [2022-02-11 00:24:13,772 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:24:13,772 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 471 transitions. [2022-02-11 00:24:13,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-11 00:24:13,772 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:24:13,772 INFO L515 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:24:13,789 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Ended with exit code 0 [2022-02-11 00:24:13,972 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,86 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:24:13,973 INFO L402 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:24:13,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:24:13,973 INFO L85 PathProgramCache]: Analyzing trace with hash 1383698547, now seen corresponding path program 86 times [2022-02-11 00:24:13,973 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:24:13,973 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1981623126] [2022-02-11 00:24:13,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:24:13,973 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:24:13,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:24:14,095 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:24:14,095 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:24:14,095 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1981623126] [2022-02-11 00:24:14,095 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1981623126] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:24:14,095 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1820169210] [2022-02-11 00:24:14,095 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-11 00:24:14,095 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:24:14,096 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:24:14,096 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) [2022-02-11 00:24:14,097 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Waiting until timeout for monitored process [2022-02-11 00:24:14,135 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-11 00:24:14,135 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:24:14,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2022-02-11 00:24:14,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:24:14,327 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:24:14,328 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:24:14,442 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:24:14,442 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 34 treesize of output 34 [2022-02-11 00:24:14,447 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:24:14,447 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 26 treesize of output 26 [2022-02-11 00:24:14,521 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:24:14,521 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1820169210] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:24:14,521 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:24:14,521 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2022-02-11 00:24:14,521 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [545226674] [2022-02-11 00:24:14,521 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:24:14,521 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-11 00:24:14,522 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:24:14,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-11 00:24:14,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2022-02-11 00:24:14,522 INFO L87 Difference]: Start difference. First operand 184 states and 471 transitions. Second operand has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:24:14,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:24:14,892 INFO L93 Difference]: Finished difference Result 248 states and 584 transitions. [2022-02-11 00:24:14,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-02-11 00:24:14,893 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-02-11 00:24:14,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:24:14,894 INFO L225 Difference]: With dead ends: 248 [2022-02-11 00:24:14,894 INFO L226 Difference]: Without dead ends: 248 [2022-02-11 00:24:14,894 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=113, Invalid=537, Unknown=0, NotChecked=0, Total=650 [2022-02-11 00:24:14,894 INFO L934 BasicCegarLoop]: 16 mSDtfsCounter, 103 mSDsluCounter, 307 mSDsCounter, 0 mSdLazyCounter, 489 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 183 SdHoareTripleChecker+Invalid, 516 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 489 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-11 00:24:14,894 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [103 Valid, 183 Invalid, 516 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 489 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-11 00:24:14,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2022-02-11 00:24:14,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 178. [2022-02-11 00:24:14,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 177 states have (on average 2.5706214689265536) internal successors, (455), 177 states have internal predecessors, (455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:24:14,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 455 transitions. [2022-02-11 00:24:14,897 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 455 transitions. Word has length 17 [2022-02-11 00:24:14,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:24:14,897 INFO L470 AbstractCegarLoop]: Abstraction has 178 states and 455 transitions. [2022-02-11 00:24:14,897 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:24:14,897 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 455 transitions. [2022-02-11 00:24:14,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-11 00:24:14,897 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:24:14,897 INFO L515 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:24:14,917 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Forceful destruction successful, exit code 0 [2022-02-11 00:24:15,098 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,87 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:24:15,098 INFO L402 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:24:15,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:24:15,098 INFO L85 PathProgramCache]: Analyzing trace with hash 123326067, now seen corresponding path program 87 times [2022-02-11 00:24:15,098 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:24:15,098 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1117594590] [2022-02-11 00:24:15,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:24:15,098 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:24:15,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:24:15,193 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:24:15,193 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:24:15,193 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1117594590] [2022-02-11 00:24:15,194 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1117594590] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:24:15,194 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [501959535] [2022-02-11 00:24:15,194 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-11 00:24:15,194 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:24:15,194 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:24:15,195 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) [2022-02-11 00:24:15,195 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Waiting until timeout for monitored process [2022-02-11 00:24:15,234 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-02-11 00:24:15,234 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:24:15,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-11 00:24:15,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:24:15,423 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 73 [2022-02-11 00:24:15,425 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 57 [2022-02-11 00:24:15,506 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:24:15,506 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:24:15,639 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:24:15,640 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 43 treesize of output 41 [2022-02-11 00:24:15,645 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:24:15,645 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 31 treesize of output 29 [2022-02-11 00:24:15,709 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:24:15,709 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [501959535] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:24:15,709 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:24:15,709 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 21 [2022-02-11 00:24:15,709 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1060384822] [2022-02-11 00:24:15,709 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:24:15,709 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-11 00:24:15,709 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:24:15,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-11 00:24:15,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2022-02-11 00:24:15,710 INFO L87 Difference]: Start difference. First operand 178 states and 455 transitions. Second operand has 21 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 21 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:24:16,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:24:16,260 INFO L93 Difference]: Finished difference Result 258 states and 618 transitions. [2022-02-11 00:24:16,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-02-11 00:24:16,260 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 21 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-02-11 00:24:16,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:24:16,261 INFO L225 Difference]: With dead ends: 258 [2022-02-11 00:24:16,261 INFO L226 Difference]: Without dead ends: 256 [2022-02-11 00:24:16,261 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=165, Invalid=891, Unknown=0, NotChecked=0, Total=1056 [2022-02-11 00:24:16,261 INFO L934 BasicCegarLoop]: 11 mSDtfsCounter, 111 mSDsluCounter, 234 mSDsCounter, 0 mSdLazyCounter, 533 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 573 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 533 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-11 00:24:16,262 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 130 Invalid, 573 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 533 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-11 00:24:16,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2022-02-11 00:24:16,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 187. [2022-02-11 00:24:16,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 186 states have (on average 2.5698924731182795) internal successors, (478), 186 states have internal predecessors, (478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:24:16,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 478 transitions. [2022-02-11 00:24:16,264 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 478 transitions. Word has length 17 [2022-02-11 00:24:16,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:24:16,264 INFO L470 AbstractCegarLoop]: Abstraction has 187 states and 478 transitions. [2022-02-11 00:24:16,264 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 21 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:24:16,264 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 478 transitions. [2022-02-11 00:24:16,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-11 00:24:16,265 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:24:16,265 INFO L515 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:24:16,281 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Ended with exit code 0 [2022-02-11 00:24:16,479 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95,88 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:24:16,479 INFO L402 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:24:16,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:24:16,480 INFO L85 PathProgramCache]: Analyzing trace with hash -2025470469, now seen corresponding path program 88 times [2022-02-11 00:24:16,480 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:24:16,480 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1042827067] [2022-02-11 00:24:16,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:24:16,480 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:24:16,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:24:16,580 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:24:16,581 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:24:16,581 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1042827067] [2022-02-11 00:24:16,581 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1042827067] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:24:16,581 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1993803850] [2022-02-11 00:24:16,581 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-11 00:24:16,581 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:24:16,581 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:24:16,582 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) [2022-02-11 00:24:16,583 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Waiting until timeout for monitored process [2022-02-11 00:24:16,621 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-11 00:24:16,621 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:24:16,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2022-02-11 00:24:16,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:24:16,847 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:24:16,847 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:24:17,010 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:24:17,010 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 41 treesize of output 39 [2022-02-11 00:24:17,017 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:24:17,017 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 29 treesize of output 27 [2022-02-11 00:24:17,081 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:24:17,081 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1993803850] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:24:17,081 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:24:17,081 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2022-02-11 00:24:17,081 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [384194958] [2022-02-11 00:24:17,081 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:24:17,081 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-11 00:24:17,081 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:24:17,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-11 00:24:17,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=320, Unknown=0, NotChecked=0, Total=380 [2022-02-11 00:24:17,082 INFO L87 Difference]: Start difference. First operand 187 states and 478 transitions. Second operand has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:24:17,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:24:17,514 INFO L93 Difference]: Finished difference Result 238 states and 579 transitions. [2022-02-11 00:24:17,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-02-11 00:24:17,514 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-02-11 00:24:17,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:24:17,515 INFO L225 Difference]: With dead ends: 238 [2022-02-11 00:24:17,515 INFO L226 Difference]: Without dead ends: 238 [2022-02-11 00:24:17,515 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=150, Invalid=780, Unknown=0, NotChecked=0, Total=930 [2022-02-11 00:24:17,515 INFO L934 BasicCegarLoop]: 7 mSDtfsCounter, 62 mSDsluCounter, 207 mSDsCounter, 0 mSdLazyCounter, 390 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 408 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 390 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-11 00:24:17,515 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 107 Invalid, 408 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 390 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-11 00:24:17,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2022-02-11 00:24:17,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 186. [2022-02-11 00:24:17,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 185 states have (on average 2.5675675675675675) internal successors, (475), 185 states have internal predecessors, (475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:24:17,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 475 transitions. [2022-02-11 00:24:17,518 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 475 transitions. Word has length 17 [2022-02-11 00:24:17,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:24:17,518 INFO L470 AbstractCegarLoop]: Abstraction has 186 states and 475 transitions. [2022-02-11 00:24:17,518 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:24:17,518 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 475 transitions. [2022-02-11 00:24:17,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-11 00:24:17,519 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:24:17,519 INFO L515 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:24:17,535 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Forceful destruction successful, exit code 0 [2022-02-11 00:24:17,719 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 89 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable96 [2022-02-11 00:24:17,719 INFO L402 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:24:17,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:24:17,720 INFO L85 PathProgramCache]: Analyzing trace with hash 81313651, now seen corresponding path program 89 times [2022-02-11 00:24:17,720 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:24:17,720 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1329327249] [2022-02-11 00:24:17,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:24:17,720 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:24:17,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:24:17,813 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:24:17,813 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:24:17,813 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1329327249] [2022-02-11 00:24:17,814 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1329327249] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:24:17,814 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [74921604] [2022-02-11 00:24:17,814 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-11 00:24:17,814 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:24:17,814 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:24:17,815 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) [2022-02-11 00:24:17,815 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Waiting until timeout for monitored process [2022-02-11 00:24:17,854 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-11 00:24:17,854 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:24:17,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2022-02-11 00:24:17,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:24:18,040 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:24:18,040 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:24:18,186 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:24:18,186 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 42 treesize of output 40 [2022-02-11 00:24:18,192 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:24:18,192 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 30 treesize of output 28 [2022-02-11 00:24:18,249 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:24:18,249 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [74921604] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:24:18,250 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:24:18,250 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 21 [2022-02-11 00:24:18,250 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1927031418] [2022-02-11 00:24:18,250 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:24:18,250 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-11 00:24:18,250 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:24:18,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-11 00:24:18,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=362, Unknown=0, NotChecked=0, Total=420 [2022-02-11 00:24:18,250 INFO L87 Difference]: Start difference. First operand 186 states and 475 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:24:18,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:24:18,542 INFO L93 Difference]: Finished difference Result 231 states and 560 transitions. [2022-02-11 00:24:18,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-11 00:24:18,542 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-02-11 00:24:18,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:24:18,543 INFO L225 Difference]: With dead ends: 231 [2022-02-11 00:24:18,543 INFO L226 Difference]: Without dead ends: 231 [2022-02-11 00:24:18,543 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=96, Invalid=554, Unknown=0, NotChecked=0, Total=650 [2022-02-11 00:24:18,544 INFO L934 BasicCegarLoop]: 8 mSDtfsCounter, 48 mSDsluCounter, 256 mSDsCounter, 0 mSdLazyCounter, 451 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 456 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 451 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-11 00:24:18,544 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 122 Invalid, 456 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 451 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-11 00:24:18,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2022-02-11 00:24:18,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 181. [2022-02-11 00:24:18,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 180 states have (on average 2.566666666666667) internal successors, (462), 180 states have internal predecessors, (462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:24:18,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 462 transitions. [2022-02-11 00:24:18,546 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 462 transitions. Word has length 17 [2022-02-11 00:24:18,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:24:18,546 INFO L470 AbstractCegarLoop]: Abstraction has 181 states and 462 transitions. [2022-02-11 00:24:18,546 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:24:18,546 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 462 transitions. [2022-02-11 00:24:18,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-11 00:24:18,547 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:24:18,547 INFO L515 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:24:18,563 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Forceful destruction successful, exit code 0 [2022-02-11 00:24:18,747 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,SelfDestructingSolverStorable97 [2022-02-11 00:24:18,747 INFO L402 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:24:18,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:24:18,748 INFO L85 PathProgramCache]: Analyzing trace with hash 774130995, now seen corresponding path program 90 times [2022-02-11 00:24:18,748 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:24:18,748 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [643326104] [2022-02-11 00:24:18,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:24:18,748 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:24:18,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:24:18,826 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:24:18,827 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:24:18,827 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [643326104] [2022-02-11 00:24:18,827 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [643326104] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:24:18,827 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1714407587] [2022-02-11 00:24:18,827 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-11 00:24:18,827 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:24:18,827 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:24:18,828 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) [2022-02-11 00:24:18,828 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Waiting until timeout for monitored process [2022-02-11 00:24:18,867 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-11 00:24:18,867 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:24:18,868 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2022-02-11 00:24:18,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:24:19,038 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:24:19,038 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:24:19,171 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:24:19,172 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 42 treesize of output 40 [2022-02-11 00:24:19,176 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:24:19,177 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 30 treesize of output 28 [2022-02-11 00:24:19,244 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:24:19,244 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1714407587] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:24:19,244 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:24:19,244 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 21 [2022-02-11 00:24:19,244 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1684476575] [2022-02-11 00:24:19,244 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:24:19,244 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-11 00:24:19,244 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:24:19,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-11 00:24:19,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=354, Unknown=0, NotChecked=0, Total=420 [2022-02-11 00:24:19,245 INFO L87 Difference]: Start difference. First operand 181 states and 462 transitions. Second operand has 21 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 21 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:24:19,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:24:19,522 INFO L93 Difference]: Finished difference Result 220 states and 534 transitions. [2022-02-11 00:24:19,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-02-11 00:24:19,522 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 21 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-02-11 00:24:19,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:24:19,523 INFO L225 Difference]: With dead ends: 220 [2022-02-11 00:24:19,523 INFO L226 Difference]: Without dead ends: 220 [2022-02-11 00:24:19,523 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=106, Invalid=544, Unknown=0, NotChecked=0, Total=650 [2022-02-11 00:24:19,523 INFO L934 BasicCegarLoop]: 12 mSDtfsCounter, 77 mSDsluCounter, 217 mSDsCounter, 0 mSdLazyCounter, 370 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 382 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 370 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-11 00:24:19,523 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 131 Invalid, 382 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 370 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-11 00:24:19,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2022-02-11 00:24:19,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 182. [2022-02-11 00:24:19,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 181 states have (on average 2.552486187845304) internal successors, (462), 181 states have internal predecessors, (462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:24:19,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 462 transitions. [2022-02-11 00:24:19,526 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 462 transitions. Word has length 17 [2022-02-11 00:24:19,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:24:19,526 INFO L470 AbstractCegarLoop]: Abstraction has 182 states and 462 transitions. [2022-02-11 00:24:19,526 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 21 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:24:19,526 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 462 transitions. [2022-02-11 00:24:19,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-11 00:24:19,527 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:24:19,527 INFO L515 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:24:19,543 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Ended with exit code 0 [2022-02-11 00:24:19,739 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 91 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable98 [2022-02-11 00:24:19,739 INFO L402 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:24:19,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:24:19,740 INFO L85 PathProgramCache]: Analyzing trace with hash -1414052181, now seen corresponding path program 91 times [2022-02-11 00:24:19,740 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:24:19,740 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [698335200] [2022-02-11 00:24:19,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:24:19,740 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:24:19,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:24:19,837 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:24:19,837 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:24:19,837 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [698335200] [2022-02-11 00:24:19,837 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [698335200] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:24:19,837 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [563559739] [2022-02-11 00:24:19,837 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-11 00:24:19,837 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:24:19,837 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:24:19,838 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) [2022-02-11 00:24:19,839 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Waiting until timeout for monitored process [2022-02-11 00:24:19,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:24:19,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2022-02-11 00:24:19,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:24:20,072 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:24:20,073 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:24:20,204 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:24:20,204 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 42 treesize of output 40 [2022-02-11 00:24:20,209 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:24:20,209 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 30 treesize of output 28 [2022-02-11 00:24:20,288 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:24:20,289 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [563559739] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:24:20,289 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:24:20,289 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2022-02-11 00:24:20,289 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [197201362] [2022-02-11 00:24:20,289 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:24:20,289 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-11 00:24:20,289 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:24:20,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-11 00:24:20,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2022-02-11 00:24:20,289 INFO L87 Difference]: Start difference. First operand 182 states and 462 transitions. Second operand has 20 states, 20 states have (on average 1.6) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:24:20,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:24:20,698 INFO L93 Difference]: Finished difference Result 225 states and 545 transitions. [2022-02-11 00:24:20,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-02-11 00:24:20,699 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.6) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-02-11 00:24:20,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:24:20,700 INFO L225 Difference]: With dead ends: 225 [2022-02-11 00:24:20,700 INFO L226 Difference]: Without dead ends: 225 [2022-02-11 00:24:20,700 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=153, Invalid=777, Unknown=0, NotChecked=0, Total=930 [2022-02-11 00:24:20,700 INFO L934 BasicCegarLoop]: 8 mSDtfsCounter, 37 mSDsluCounter, 149 mSDsCounter, 0 mSdLazyCounter, 302 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 327 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 302 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-11 00:24:20,700 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 91 Invalid, 327 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 302 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-11 00:24:20,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2022-02-11 00:24:20,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 179. [2022-02-11 00:24:20,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 178 states have (on average 2.556179775280899) internal successors, (455), 178 states have internal predecessors, (455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:24:20,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 455 transitions. [2022-02-11 00:24:20,702 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 455 transitions. Word has length 17 [2022-02-11 00:24:20,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:24:20,703 INFO L470 AbstractCegarLoop]: Abstraction has 179 states and 455 transitions. [2022-02-11 00:24:20,703 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.6) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:24:20,703 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 455 transitions. [2022-02-11 00:24:20,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-11 00:24:20,703 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:24:20,703 INFO L515 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:24:20,721 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Forceful destruction successful, exit code 0 [2022-02-11 00:24:20,915 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99,92 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:24:20,915 INFO L402 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:24:20,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:24:20,916 INFO L85 PathProgramCache]: Analyzing trace with hash 732118579, now seen corresponding path program 92 times [2022-02-11 00:24:20,916 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:24:20,916 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [700298874] [2022-02-11 00:24:20,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:24:20,916 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:24:20,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:24:21,016 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:24:21,016 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:24:21,016 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [700298874] [2022-02-11 00:24:21,016 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [700298874] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:24:21,017 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1986472943] [2022-02-11 00:24:21,017 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-11 00:24:21,017 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:24:21,017 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:24:21,018 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) [2022-02-11 00:24:21,018 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Waiting until timeout for monitored process [2022-02-11 00:24:21,056 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-11 00:24:21,056 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:24:21,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2022-02-11 00:24:21,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:24:21,226 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 87 treesize of output 71 [2022-02-11 00:24:21,228 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 55 [2022-02-11 00:24:21,301 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:24:21,301 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:24:21,457 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:24:21,458 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 42 treesize of output 40 [2022-02-11 00:24:21,462 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:24:21,463 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 30 treesize of output 28 [2022-02-11 00:24:21,517 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:24:21,517 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1986472943] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:24:21,517 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:24:21,517 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2022-02-11 00:24:21,517 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [202173941] [2022-02-11 00:24:21,517 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:24:21,518 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-11 00:24:21,518 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:24:21,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-11 00:24:21,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=320, Unknown=0, NotChecked=0, Total=380 [2022-02-11 00:24:21,518 INFO L87 Difference]: Start difference. First operand 179 states and 455 transitions. Second operand has 20 states, 20 states have (on average 1.6) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:24:21,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:24:21,984 INFO L93 Difference]: Finished difference Result 236 states and 560 transitions. [2022-02-11 00:24:21,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-02-11 00:24:21,985 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.6) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-02-11 00:24:21,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:24:21,986 INFO L225 Difference]: With dead ends: 236 [2022-02-11 00:24:21,986 INFO L226 Difference]: Without dead ends: 236 [2022-02-11 00:24:21,986 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 220 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=158, Invalid=834, Unknown=0, NotChecked=0, Total=992 [2022-02-11 00:24:21,986 INFO L934 BasicCegarLoop]: 13 mSDtfsCounter, 83 mSDsluCounter, 148 mSDsCounter, 0 mSdLazyCounter, 342 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 385 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 342 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-11 00:24:21,986 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [83 Valid, 109 Invalid, 385 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 342 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-11 00:24:21,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2022-02-11 00:24:21,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 178. [2022-02-11 00:24:21,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 177 states have (on average 2.5706214689265536) internal successors, (455), 177 states have internal predecessors, (455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:24:21,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 455 transitions. [2022-02-11 00:24:21,989 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 455 transitions. Word has length 17 [2022-02-11 00:24:21,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:24:21,989 INFO L470 AbstractCegarLoop]: Abstraction has 178 states and 455 transitions. [2022-02-11 00:24:21,989 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.6) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:24:21,989 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 455 transitions. [2022-02-11 00:24:21,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-11 00:24:21,989 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:24:21,989 INFO L515 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:24:22,005 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Forceful destruction successful, exit code 0 [2022-02-11 00:24:22,190 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100,93 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:24:22,190 INFO L402 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:24:22,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:24:22,190 INFO L85 PathProgramCache]: Analyzing trace with hash -570266317, now seen corresponding path program 93 times [2022-02-11 00:24:22,190 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:24:22,190 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [382191774] [2022-02-11 00:24:22,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:24:22,190 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:24:22,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:24:22,306 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:24:22,306 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:24:22,306 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [382191774] [2022-02-11 00:24:22,306 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [382191774] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:24:22,307 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1247476158] [2022-02-11 00:24:22,307 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-11 00:24:22,307 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:24:22,307 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:24:22,308 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) [2022-02-11 00:24:22,338 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Waiting until timeout for monitored process [2022-02-11 00:24:22,352 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-11 00:24:22,353 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:24:22,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2022-02-11 00:24:22,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:24:22,522 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 96 treesize of output 80 [2022-02-11 00:24:22,524 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 80 treesize of output 64 [2022-02-11 00:24:22,584 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:24:22,584 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:24:22,669 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:24:22,669 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 63 treesize of output 59 [2022-02-11 00:24:22,675 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:24:22,675 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 51 treesize of output 47 [2022-02-11 00:24:22,795 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:24:22,795 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1247476158] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:24:22,795 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:24:22,795 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2022-02-11 00:24:22,795 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2125898622] [2022-02-11 00:24:22,795 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:24:22,796 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-11 00:24:22,796 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:24:22,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-11 00:24:22,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=307, Unknown=0, NotChecked=0, Total=380 [2022-02-11 00:24:22,796 INFO L87 Difference]: Start difference. First operand 178 states and 455 transitions. Second operand has 20 states, 20 states have (on average 1.6) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:24:22,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:24:22,949 INFO L93 Difference]: Finished difference Result 234 states and 545 transitions. [2022-02-11 00:24:22,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-02-11 00:24:22,949 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.6) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-02-11 00:24:22,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:24:22,949 INFO L225 Difference]: With dead ends: 234 [2022-02-11 00:24:22,949 INFO L226 Difference]: Without dead ends: 234 [2022-02-11 00:24:22,950 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=83, Invalid=337, Unknown=0, NotChecked=0, Total=420 [2022-02-11 00:24:22,950 INFO L934 BasicCegarLoop]: 14 mSDtfsCounter, 84 mSDsluCounter, 217 mSDsCounter, 0 mSdLazyCounter, 354 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 367 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 354 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-11 00:24:22,950 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 142 Invalid, 367 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 354 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-11 00:24:22,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2022-02-11 00:24:22,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 176. [2022-02-11 00:24:22,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 175 states have (on average 2.577142857142857) internal successors, (451), 175 states have internal predecessors, (451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:24:22,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 451 transitions. [2022-02-11 00:24:22,953 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 451 transitions. Word has length 17 [2022-02-11 00:24:22,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:24:22,953 INFO L470 AbstractCegarLoop]: Abstraction has 176 states and 451 transitions. [2022-02-11 00:24:22,953 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.6) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:24:22,953 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 451 transitions. [2022-02-11 00:24:22,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-11 00:24:22,953 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:24:22,953 INFO L515 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:24:22,970 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Ended with exit code 0 [2022-02-11 00:24:23,161 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable101 [2022-02-11 00:24:23,161 INFO L402 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:24:23,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:24:23,161 INFO L85 PathProgramCache]: Analyzing trace with hash -1914922261, now seen corresponding path program 94 times [2022-02-11 00:24:23,161 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:24:23,161 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1735808097] [2022-02-11 00:24:23,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:24:23,162 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:24:23,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:24:23,286 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:24:23,286 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:24:23,286 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1735808097] [2022-02-11 00:24:23,286 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1735808097] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:24:23,286 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [937792836] [2022-02-11 00:24:23,286 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-11 00:24:23,286 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:24:23,286 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:24:23,287 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) [2022-02-11 00:24:23,288 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Waiting until timeout for monitored process [2022-02-11 00:24:23,334 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-11 00:24:23,334 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:24:23,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2022-02-11 00:24:23,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:24:23,493 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 87 treesize of output 71 [2022-02-11 00:24:23,495 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 55 [2022-02-11 00:24:23,569 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:24:23,569 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:24:23,678 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:24:23,678 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 33 treesize of output 33 [2022-02-11 00:24:23,683 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:24:23,683 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 25 treesize of output 25 [2022-02-11 00:24:23,759 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:24:23,760 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [937792836] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:24:23,760 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:24:23,760 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2022-02-11 00:24:23,760 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131547632] [2022-02-11 00:24:23,760 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:24:23,760 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-11 00:24:23,760 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:24:23,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-11 00:24:23,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2022-02-11 00:24:23,761 INFO L87 Difference]: Start difference. First operand 176 states and 451 transitions. Second operand has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:24:24,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:24:24,015 INFO L93 Difference]: Finished difference Result 274 states and 640 transitions. [2022-02-11 00:24:24,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-02-11 00:24:24,015 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-02-11 00:24:24,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:24:24,016 INFO L225 Difference]: With dead ends: 274 [2022-02-11 00:24:24,016 INFO L226 Difference]: Without dead ends: 272 [2022-02-11 00:24:24,016 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=94, Invalid=412, Unknown=0, NotChecked=0, Total=506 [2022-02-11 00:24:24,016 INFO L934 BasicCegarLoop]: 14 mSDtfsCounter, 124 mSDsluCounter, 246 mSDsCounter, 0 mSdLazyCounter, 477 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 152 SdHoareTripleChecker+Invalid, 509 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 477 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-11 00:24:24,017 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [124 Valid, 152 Invalid, 509 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 477 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-11 00:24:24,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2022-02-11 00:24:24,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 184. [2022-02-11 00:24:24,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 183 states have (on average 2.5901639344262297) internal successors, (474), 183 states have internal predecessors, (474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:24:24,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 474 transitions. [2022-02-11 00:24:24,019 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 474 transitions. Word has length 17 [2022-02-11 00:24:24,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:24:24,020 INFO L470 AbstractCegarLoop]: Abstraction has 184 states and 474 transitions. [2022-02-11 00:24:24,020 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:24:24,020 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 474 transitions. [2022-02-11 00:24:24,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-11 00:24:24,020 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:24:24,020 INFO L515 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:24:24,036 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Ended with exit code 0 [2022-02-11 00:24:24,236 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,SelfDestructingSolverStorable102 [2022-02-11 00:24:24,237 INFO L402 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:24:24,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:24:24,237 INFO L85 PathProgramCache]: Analyzing trace with hash 231248499, now seen corresponding path program 95 times [2022-02-11 00:24:24,237 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:24:24,237 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [789637315] [2022-02-11 00:24:24,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:24:24,237 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:24:24,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:24:24,349 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:24:24,350 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:24:24,350 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [789637315] [2022-02-11 00:24:24,350 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [789637315] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:24:24,350 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1759151850] [2022-02-11 00:24:24,350 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-11 00:24:24,350 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:24:24,350 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:24:24,351 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) [2022-02-11 00:24:24,352 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Waiting until timeout for monitored process [2022-02-11 00:24:24,393 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-02-11 00:24:24,393 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:24:24,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2022-02-11 00:24:24,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:24:24,580 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:24:24,580 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:24:24,721 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:24:24,721 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 34 treesize of output 34 [2022-02-11 00:24:24,726 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:24:24,727 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 26 treesize of output 26 [2022-02-11 00:24:24,799 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:24:24,799 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1759151850] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:24:24,799 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:24:24,799 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2022-02-11 00:24:24,800 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1792324540] [2022-02-11 00:24:24,800 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:24:24,800 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-11 00:24:24,800 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:24:24,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-11 00:24:24,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2022-02-11 00:24:24,800 INFO L87 Difference]: Start difference. First operand 184 states and 474 transitions. Second operand has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:24:25,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:24:25,030 INFO L93 Difference]: Finished difference Result 235 states and 568 transitions. [2022-02-11 00:24:25,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-02-11 00:24:25,030 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-02-11 00:24:25,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:24:25,031 INFO L225 Difference]: With dead ends: 235 [2022-02-11 00:24:25,031 INFO L226 Difference]: Without dead ends: 235 [2022-02-11 00:24:25,031 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=85, Invalid=377, Unknown=0, NotChecked=0, Total=462 [2022-02-11 00:24:25,031 INFO L934 BasicCegarLoop]: 13 mSDtfsCounter, 77 mSDsluCounter, 208 mSDsCounter, 0 mSdLazyCounter, 404 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 420 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 404 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-11 00:24:25,031 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 120 Invalid, 420 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 404 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-11 00:24:25,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2022-02-11 00:24:25,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 182. [2022-02-11 00:24:25,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 181 states have (on average 2.591160220994475) internal successors, (469), 181 states have internal predecessors, (469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:24:25,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 469 transitions. [2022-02-11 00:24:25,034 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 469 transitions. Word has length 17 [2022-02-11 00:24:25,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:24:25,034 INFO L470 AbstractCegarLoop]: Abstraction has 182 states and 469 transitions. [2022-02-11 00:24:25,034 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:24:25,034 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 469 transitions. [2022-02-11 00:24:25,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-11 00:24:25,034 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:24:25,034 INFO L515 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:24:25,052 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Forceful destruction successful, exit code 0 [2022-02-11 00:24:25,235 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,SelfDestructingSolverStorable103 [2022-02-11 00:24:25,235 INFO L402 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:24:25,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:24:25,235 INFO L85 PathProgramCache]: Analyzing trace with hash -917604825, now seen corresponding path program 96 times [2022-02-11 00:24:25,235 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:24:25,235 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1483026850] [2022-02-11 00:24:25,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:24:25,235 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:24:25,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:24:25,391 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:24:25,391 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:24:25,391 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1483026850] [2022-02-11 00:24:25,391 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1483026850] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:24:25,391 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1286640937] [2022-02-11 00:24:25,391 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-11 00:24:25,392 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:24:25,392 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:24:25,396 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) [2022-02-11 00:24:25,427 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Waiting until timeout for monitored process [2022-02-11 00:24:25,458 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-02-11 00:24:25,458 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:24:25,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2022-02-11 00:24:25,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:24:25,723 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:24:25,723 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:24:25,869 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:24:25,870 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 33 treesize of output 33 [2022-02-11 00:24:25,874 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:24:25,874 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 25 treesize of output 25 [2022-02-11 00:24:25,956 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:24:25,957 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1286640937] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:24:25,957 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:24:25,957 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2022-02-11 00:24:25,957 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2075539353] [2022-02-11 00:24:25,957 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:24:25,957 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-11 00:24:25,957 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:24:25,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-11 00:24:25,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2022-02-11 00:24:25,958 INFO L87 Difference]: Start difference. First operand 182 states and 469 transitions. Second operand has 20 states, 20 states have (on average 1.7) internal successors, (34), 20 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:24:26,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:24:26,257 INFO L93 Difference]: Finished difference Result 232 states and 566 transitions. [2022-02-11 00:24:26,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-02-11 00:24:26,258 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.7) internal successors, (34), 20 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-02-11 00:24:26,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:24:26,258 INFO L225 Difference]: With dead ends: 232 [2022-02-11 00:24:26,258 INFO L226 Difference]: Without dead ends: 232 [2022-02-11 00:24:26,258 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=101, Invalid=451, Unknown=0, NotChecked=0, Total=552 [2022-02-11 00:24:26,258 INFO L934 BasicCegarLoop]: 13 mSDtfsCounter, 60 mSDsluCounter, 276 mSDsCounter, 0 mSdLazyCounter, 535 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 159 SdHoareTripleChecker+Invalid, 554 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 535 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-11 00:24:26,258 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 159 Invalid, 554 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 535 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-11 00:24:26,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2022-02-11 00:24:26,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 182. [2022-02-11 00:24:26,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 181 states have (on average 2.596685082872928) internal successors, (470), 181 states have internal predecessors, (470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:24:26,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 470 transitions. [2022-02-11 00:24:26,261 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 470 transitions. Word has length 17 [2022-02-11 00:24:26,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:24:26,261 INFO L470 AbstractCegarLoop]: Abstraction has 182 states and 470 transitions. [2022-02-11 00:24:26,261 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.7) internal successors, (34), 20 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:24:26,261 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 470 transitions. [2022-02-11 00:24:26,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-11 00:24:26,261 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:24:26,262 INFO L515 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:24:26,278 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Ended with exit code 0 [2022-02-11 00:24:26,474 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104,97 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:24:26,475 INFO L402 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:24:26,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:24:26,475 INFO L85 PathProgramCache]: Analyzing trace with hash 1963203819, now seen corresponding path program 97 times [2022-02-11 00:24:26,475 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:24:26,475 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1764567298] [2022-02-11 00:24:26,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:24:26,475 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:24:26,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:24:26,586 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:24:26,587 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:24:26,587 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1764567298] [2022-02-11 00:24:26,587 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1764567298] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:24:26,587 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1027596409] [2022-02-11 00:24:26,587 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-11 00:24:26,587 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:24:26,587 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:24:26,588 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) [2022-02-11 00:24:26,588 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Waiting until timeout for monitored process [2022-02-11 00:24:26,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:24:26,629 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2022-02-11 00:24:26,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:24:26,797 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 98 treesize of output 82 [2022-02-11 00:24:26,799 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 82 treesize of output 66 [2022-02-11 00:24:26,868 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:24:26,869 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:24:26,956 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:24:26,956 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 65 treesize of output 61 [2022-02-11 00:24:26,963 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:24:26,964 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 53 treesize of output 49 [2022-02-11 00:24:27,107 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:24:27,107 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1027596409] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:24:27,107 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:24:27,107 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2022-02-11 00:24:27,107 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617991870] [2022-02-11 00:24:27,107 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:24:27,108 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-11 00:24:27,108 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:24:27,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-11 00:24:27,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2022-02-11 00:24:27,108 INFO L87 Difference]: Start difference. First operand 182 states and 470 transitions. Second operand has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:24:27,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:24:27,296 INFO L93 Difference]: Finished difference Result 233 states and 557 transitions. [2022-02-11 00:24:27,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-02-11 00:24:27,296 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-02-11 00:24:27,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:24:27,297 INFO L225 Difference]: With dead ends: 233 [2022-02-11 00:24:27,297 INFO L226 Difference]: Without dead ends: 231 [2022-02-11 00:24:27,297 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=88, Invalid=374, Unknown=0, NotChecked=0, Total=462 [2022-02-11 00:24:27,297 INFO L934 BasicCegarLoop]: 15 mSDtfsCounter, 61 mSDsluCounter, 226 mSDsCounter, 0 mSdLazyCounter, 396 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 412 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 396 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-11 00:24:27,297 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 151 Invalid, 412 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 396 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-11 00:24:27,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2022-02-11 00:24:27,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 180. [2022-02-11 00:24:27,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 179 states have (on average 2.5921787709497206) internal successors, (464), 179 states have internal predecessors, (464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:24:27,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 464 transitions. [2022-02-11 00:24:27,300 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 464 transitions. Word has length 17 [2022-02-11 00:24:27,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:24:27,300 INFO L470 AbstractCegarLoop]: Abstraction has 180 states and 464 transitions. [2022-02-11 00:24:27,300 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:24:27,300 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 464 transitions. [2022-02-11 00:24:27,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-11 00:24:27,300 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:24:27,300 INFO L515 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:24:27,317 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Forceful destruction successful, exit code 0 [2022-02-11 00:24:27,501 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105,98 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:24:27,501 INFO L402 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:24:27,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:24:27,502 INFO L85 PathProgramCache]: Analyzing trace with hash -224979357, now seen corresponding path program 98 times [2022-02-11 00:24:27,502 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:24:27,502 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [657821295] [2022-02-11 00:24:27,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:24:27,502 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:24:27,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:24:27,625 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:24:27,625 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:24:27,625 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [657821295] [2022-02-11 00:24:27,625 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [657821295] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:24:27,625 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1200570043] [2022-02-11 00:24:27,625 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-11 00:24:27,625 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:24:27,625 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:24:27,626 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) [2022-02-11 00:24:27,627 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Waiting until timeout for monitored process [2022-02-11 00:24:27,666 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-11 00:24:27,666 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:24:27,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2022-02-11 00:24:27,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:24:27,826 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 87 treesize of output 71 [2022-02-11 00:24:27,827 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 55 [2022-02-11 00:24:27,898 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:24:27,898 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:24:28,011 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:24:28,011 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 34 treesize of output 34 [2022-02-11 00:24:28,017 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:24:28,017 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 26 treesize of output 26 [2022-02-11 00:24:28,105 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:24:28,105 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1200570043] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:24:28,105 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:24:28,105 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2022-02-11 00:24:28,105 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732866171] [2022-02-11 00:24:28,106 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:24:28,106 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-11 00:24:28,106 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:24:28,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-11 00:24:28,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2022-02-11 00:24:28,106 INFO L87 Difference]: Start difference. First operand 180 states and 464 transitions. Second operand has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:24:28,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:24:28,522 INFO L93 Difference]: Finished difference Result 256 states and 629 transitions. [2022-02-11 00:24:28,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-02-11 00:24:28,522 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-02-11 00:24:28,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:24:28,523 INFO L225 Difference]: With dead ends: 256 [2022-02-11 00:24:28,523 INFO L226 Difference]: Without dead ends: 254 [2022-02-11 00:24:28,523 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=171, Invalid=759, Unknown=0, NotChecked=0, Total=930 [2022-02-11 00:24:28,523 INFO L934 BasicCegarLoop]: 9 mSDtfsCounter, 103 mSDsluCounter, 166 mSDsCounter, 0 mSdLazyCounter, 337 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 394 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 337 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-11 00:24:28,524 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [103 Valid, 95 Invalid, 394 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 337 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-11 00:24:28,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2022-02-11 00:24:28,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 193. [2022-02-11 00:24:28,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 192 states have (on average 2.609375) internal successors, (501), 192 states have internal predecessors, (501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:24:28,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 501 transitions. [2022-02-11 00:24:28,526 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 501 transitions. Word has length 17 [2022-02-11 00:24:28,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:24:28,526 INFO L470 AbstractCegarLoop]: Abstraction has 193 states and 501 transitions. [2022-02-11 00:24:28,526 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:24:28,526 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 501 transitions. [2022-02-11 00:24:28,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-11 00:24:28,527 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:24:28,527 INFO L515 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:24:28,549 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Forceful destruction successful, exit code 0 [2022-02-11 00:24:28,743 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,SelfDestructingSolverStorable106 [2022-02-11 00:24:28,743 INFO L402 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:24:28,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:24:28,743 INFO L85 PathProgramCache]: Analyzing trace with hash 1921191403, now seen corresponding path program 99 times [2022-02-11 00:24:28,744 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:24:28,744 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [384569410] [2022-02-11 00:24:28,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:24:28,744 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:24:28,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:24:28,880 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:24:28,880 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:24:28,880 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [384569410] [2022-02-11 00:24:28,881 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [384569410] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:24:28,881 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1420852182] [2022-02-11 00:24:28,881 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-11 00:24:28,881 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:24:28,881 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:24:28,884 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) [2022-02-11 00:24:28,884 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Waiting until timeout for monitored process [2022-02-11 00:24:28,927 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-02-11 00:24:28,927 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:24:28,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2022-02-11 00:24:28,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:24:29,148 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:24:29,149 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:24:29,296 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:24:29,296 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 34 treesize of output 34 [2022-02-11 00:24:29,301 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:24:29,301 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 26 treesize of output 26 [2022-02-11 00:24:29,392 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:24:29,392 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1420852182] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:24:29,392 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:24:29,392 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2022-02-11 00:24:29,392 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [541182309] [2022-02-11 00:24:29,392 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:24:29,392 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-11 00:24:29,392 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:24:29,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-11 00:24:29,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2022-02-11 00:24:29,393 INFO L87 Difference]: Start difference. First operand 193 states and 501 transitions. Second operand has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:24:29,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:24:29,727 INFO L93 Difference]: Finished difference Result 253 states and 606 transitions. [2022-02-11 00:24:29,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-02-11 00:24:29,727 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-02-11 00:24:29,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:24:29,728 INFO L225 Difference]: With dead ends: 253 [2022-02-11 00:24:29,728 INFO L226 Difference]: Without dead ends: 253 [2022-02-11 00:24:29,728 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=105, Invalid=495, Unknown=0, NotChecked=0, Total=600 [2022-02-11 00:24:29,729 INFO L934 BasicCegarLoop]: 16 mSDtfsCounter, 98 mSDsluCounter, 257 mSDsCounter, 0 mSdLazyCounter, 439 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 466 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 439 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-11 00:24:29,730 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [98 Valid, 153 Invalid, 466 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 439 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-11 00:24:29,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2022-02-11 00:24:29,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 185. [2022-02-11 00:24:29,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 184 states have (on average 2.597826086956522) internal successors, (478), 184 states have internal predecessors, (478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:24:29,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 478 transitions. [2022-02-11 00:24:29,733 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 478 transitions. Word has length 17 [2022-02-11 00:24:29,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:24:29,733 INFO L470 AbstractCegarLoop]: Abstraction has 185 states and 478 transitions. [2022-02-11 00:24:29,733 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:24:29,733 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 478 transitions. [2022-02-11 00:24:29,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-11 00:24:29,734 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:24:29,734 INFO L515 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:24:29,751 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Ended with exit code 0 [2022-02-11 00:24:29,941 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107,100 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:24:29,941 INFO L402 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:24:29,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:24:29,942 INFO L85 PathProgramCache]: Analyzing trace with hash 660818923, now seen corresponding path program 100 times [2022-02-11 00:24:29,942 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:24:29,942 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1786042589] [2022-02-11 00:24:29,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:24:29,942 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:24:29,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:24:30,045 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:24:30,045 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:24:30,046 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1786042589] [2022-02-11 00:24:30,046 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1786042589] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:24:30,046 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2112345513] [2022-02-11 00:24:30,046 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-11 00:24:30,046 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:24:30,046 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:24:30,047 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) [2022-02-11 00:24:30,047 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Waiting until timeout for monitored process [2022-02-11 00:24:30,087 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-11 00:24:30,088 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:24:30,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2022-02-11 00:24:30,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:24:30,262 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 73 [2022-02-11 00:24:30,264 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 57 [2022-02-11 00:24:30,330 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:24:30,330 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:24:30,481 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:24:30,481 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 42 treesize of output 40 [2022-02-11 00:24:30,486 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:24:30,486 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 30 treesize of output 28 [2022-02-11 00:24:30,552 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:24:30,552 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2112345513] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:24:30,552 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:24:30,552 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2022-02-11 00:24:30,552 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1639928541] [2022-02-11 00:24:30,552 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:24:30,552 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-11 00:24:30,552 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:24:30,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-11 00:24:30,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=324, Unknown=0, NotChecked=0, Total=380 [2022-02-11 00:24:30,553 INFO L87 Difference]: Start difference. First operand 185 states and 478 transitions. Second operand has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:24:31,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:24:31,074 INFO L93 Difference]: Finished difference Result 259 states and 632 transitions. [2022-02-11 00:24:31,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-02-11 00:24:31,074 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-02-11 00:24:31,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:24:31,075 INFO L225 Difference]: With dead ends: 259 [2022-02-11 00:24:31,075 INFO L226 Difference]: Without dead ends: 257 [2022-02-11 00:24:31,075 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=156, Invalid=836, Unknown=0, NotChecked=0, Total=992 [2022-02-11 00:24:31,075 INFO L934 BasicCegarLoop]: 10 mSDtfsCounter, 134 mSDsluCounter, 198 mSDsCounter, 0 mSdLazyCounter, 435 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 485 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 435 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-11 00:24:31,075 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [134 Valid, 113 Invalid, 485 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 435 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-11 00:24:31,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2022-02-11 00:24:31,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 193. [2022-02-11 00:24:31,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 192 states have (on average 2.5989583333333335) internal successors, (499), 192 states have internal predecessors, (499), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:24:31,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 499 transitions. [2022-02-11 00:24:31,078 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 499 transitions. Word has length 17 [2022-02-11 00:24:31,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:24:31,078 INFO L470 AbstractCegarLoop]: Abstraction has 193 states and 499 transitions. [2022-02-11 00:24:31,078 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:24:31,078 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 499 transitions. [2022-02-11 00:24:31,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-11 00:24:31,078 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:24:31,078 INFO L515 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:24:31,095 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Forceful destruction successful, exit code 0 [2022-02-11 00:24:31,279 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108,101 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:24:31,279 INFO L402 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:24:31,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:24:31,279 INFO L85 PathProgramCache]: Analyzing trace with hash -1487977613, now seen corresponding path program 101 times [2022-02-11 00:24:31,279 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:24:31,279 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1795312595] [2022-02-11 00:24:31,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:24:31,279 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:24:31,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:24:31,396 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:24:31,397 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:24:31,397 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1795312595] [2022-02-11 00:24:31,397 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1795312595] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:24:31,397 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1036993213] [2022-02-11 00:24:31,397 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-11 00:24:31,397 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:24:31,397 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:24:31,398 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) [2022-02-11 00:24:31,399 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Waiting until timeout for monitored process [2022-02-11 00:24:31,441 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-11 00:24:31,441 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:24:31,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2022-02-11 00:24:31,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:24:31,678 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:24:31,679 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:24:31,835 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:24:31,835 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 41 treesize of output 39 [2022-02-11 00:24:31,840 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:24:31,841 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 29 treesize of output 27 [2022-02-11 00:24:31,910 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:24:31,910 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1036993213] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:24:31,910 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:24:31,910 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2022-02-11 00:24:31,910 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [467319064] [2022-02-11 00:24:31,910 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:24:31,910 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-11 00:24:31,910 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:24:31,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-11 00:24:31,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2022-02-11 00:24:31,911 INFO L87 Difference]: Start difference. First operand 193 states and 499 transitions. Second operand has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:24:32,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:24:32,381 INFO L93 Difference]: Finished difference Result 242 states and 599 transitions. [2022-02-11 00:24:32,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-02-11 00:24:32,381 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-02-11 00:24:32,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:24:32,381 INFO L225 Difference]: With dead ends: 242 [2022-02-11 00:24:32,381 INFO L226 Difference]: Without dead ends: 242 [2022-02-11 00:24:32,382 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=145, Invalid=785, Unknown=0, NotChecked=0, Total=930 [2022-02-11 00:24:32,382 INFO L934 BasicCegarLoop]: 7 mSDtfsCounter, 66 mSDsluCounter, 209 mSDsCounter, 0 mSdLazyCounter, 408 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 429 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 408 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-11 00:24:32,382 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 106 Invalid, 429 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 408 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-11 00:24:32,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2022-02-11 00:24:32,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 191. [2022-02-11 00:24:32,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 190 states have (on average 2.6) internal successors, (494), 190 states have internal predecessors, (494), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:24:32,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 494 transitions. [2022-02-11 00:24:32,384 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 494 transitions. Word has length 17 [2022-02-11 00:24:32,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:24:32,384 INFO L470 AbstractCegarLoop]: Abstraction has 191 states and 494 transitions. [2022-02-11 00:24:32,384 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:24:32,385 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 494 transitions. [2022-02-11 00:24:32,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-11 00:24:32,385 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:24:32,385 INFO L515 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:24:32,405 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Ended with exit code 0 [2022-02-11 00:24:32,585 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109,102 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:24:32,585 INFO L402 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:24:32,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:24:32,586 INFO L85 PathProgramCache]: Analyzing trace with hash 618806507, now seen corresponding path program 102 times [2022-02-11 00:24:32,586 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:24:32,586 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1451652628] [2022-02-11 00:24:32,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:24:32,586 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:24:32,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:24:32,675 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:24:32,675 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:24:32,675 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1451652628] [2022-02-11 00:24:32,675 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1451652628] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:24:32,675 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [761893341] [2022-02-11 00:24:32,675 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-11 00:24:32,675 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:24:32,675 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:24:32,676 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) [2022-02-11 00:24:32,677 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Waiting until timeout for monitored process [2022-02-11 00:24:32,720 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-11 00:24:32,721 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:24:32,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2022-02-11 00:24:32,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:24:32,917 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:24:32,917 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:24:33,089 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:24:33,090 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 42 treesize of output 40 [2022-02-11 00:24:33,095 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:24:33,095 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 30 treesize of output 28 [2022-02-11 00:24:33,160 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:24:33,160 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [761893341] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:24:33,160 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:24:33,160 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 21 [2022-02-11 00:24:33,160 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2066527262] [2022-02-11 00:24:33,160 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:24:33,160 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-11 00:24:33,160 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:24:33,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-11 00:24:33,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2022-02-11 00:24:33,161 INFO L87 Difference]: Start difference. First operand 191 states and 494 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:24:33,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:24:33,422 INFO L93 Difference]: Finished difference Result 235 states and 581 transitions. [2022-02-11 00:24:33,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-11 00:24:33,422 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-02-11 00:24:33,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:24:33,423 INFO L225 Difference]: With dead ends: 235 [2022-02-11 00:24:33,423 INFO L226 Difference]: Without dead ends: 235 [2022-02-11 00:24:33,423 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=81, Invalid=519, Unknown=0, NotChecked=0, Total=600 [2022-02-11 00:24:33,423 INFO L934 BasicCegarLoop]: 8 mSDtfsCounter, 48 mSDsluCounter, 201 mSDsCounter, 0 mSdLazyCounter, 384 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 387 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 384 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-11 00:24:33,423 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 98 Invalid, 387 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 384 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-11 00:24:33,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2022-02-11 00:24:33,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 184. [2022-02-11 00:24:33,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 183 states have (on average 2.601092896174863) internal successors, (476), 183 states have internal predecessors, (476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:24:33,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 476 transitions. [2022-02-11 00:24:33,426 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 476 transitions. Word has length 17 [2022-02-11 00:24:33,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:24:33,426 INFO L470 AbstractCegarLoop]: Abstraction has 184 states and 476 transitions. [2022-02-11 00:24:33,426 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:24:33,426 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 476 transitions. [2022-02-11 00:24:33,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-11 00:24:33,426 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:24:33,426 INFO L515 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:24:33,443 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Forceful destruction successful, exit code 0 [2022-02-11 00:24:33,627 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,SelfDestructingSolverStorable110 [2022-02-11 00:24:33,627 INFO L402 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:24:33,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:24:33,627 INFO L85 PathProgramCache]: Analyzing trace with hash -493293589, now seen corresponding path program 103 times [2022-02-11 00:24:33,627 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:24:33,628 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [648376376] [2022-02-11 00:24:33,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:24:33,628 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:24:33,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:24:33,744 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:24:33,745 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:24:33,745 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [648376376] [2022-02-11 00:24:33,745 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [648376376] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:24:33,745 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [992847163] [2022-02-11 00:24:33,745 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-11 00:24:33,745 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:24:33,745 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:24:33,746 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) [2022-02-11 00:24:33,746 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Waiting until timeout for monitored process [2022-02-11 00:24:33,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:24:33,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 25 conjunts are in the unsatisfiable core [2022-02-11 00:24:33,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:24:34,149 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:24:34,149 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:24:34,368 INFO L353 Elim1Store]: treesize reduction 26, result has 10.3 percent of original size [2022-02-11 00:24:34,368 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 55 treesize of output 42 [2022-02-11 00:24:34,370 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 10 [2022-02-11 00:24:34,376 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:24:34,376 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [992847163] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:24:34,376 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:24:34,376 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2022-02-11 00:24:34,376 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [357069406] [2022-02-11 00:24:34,376 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:24:34,376 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-11 00:24:34,376 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:24:34,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-11 00:24:34,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=296, Unknown=0, NotChecked=0, Total=380 [2022-02-11 00:24:34,377 INFO L87 Difference]: Start difference. First operand 184 states and 476 transitions. Second operand has 20 states, 20 states have (on average 1.7) internal successors, (34), 20 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:24:34,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:24:34,706 INFO L93 Difference]: Finished difference Result 250 states and 595 transitions. [2022-02-11 00:24:34,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-02-11 00:24:34,706 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.7) internal successors, (34), 20 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-02-11 00:24:34,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:24:34,706 INFO L225 Difference]: With dead ends: 250 [2022-02-11 00:24:34,707 INFO L226 Difference]: Without dead ends: 250 [2022-02-11 00:24:34,707 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=150, Invalid=552, Unknown=0, NotChecked=0, Total=702 [2022-02-11 00:24:34,707 INFO L934 BasicCegarLoop]: 14 mSDtfsCounter, 123 mSDsluCounter, 170 mSDsCounter, 0 mSdLazyCounter, 311 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 332 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 311 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-11 00:24:34,707 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [123 Valid, 97 Invalid, 332 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 311 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-11 00:24:34,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2022-02-11 00:24:34,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 184. [2022-02-11 00:24:34,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 183 states have (on average 2.601092896174863) internal successors, (476), 183 states have internal predecessors, (476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:24:34,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 476 transitions. [2022-02-11 00:24:34,709 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 476 transitions. Word has length 17 [2022-02-11 00:24:34,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:24:34,710 INFO L470 AbstractCegarLoop]: Abstraction has 184 states and 476 transitions. [2022-02-11 00:24:34,710 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.7) internal successors, (34), 20 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:24:34,710 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 476 transitions. [2022-02-11 00:24:34,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-11 00:24:34,710 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:24:34,710 INFO L515 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:24:34,726 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Ended with exit code 0 [2022-02-11 00:24:34,923 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111,104 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:24:34,923 INFO L402 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:24:34,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:24:34,924 INFO L85 PathProgramCache]: Analyzing trace with hash -1907452241, now seen corresponding path program 104 times [2022-02-11 00:24:34,924 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:24:34,924 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [123705449] [2022-02-11 00:24:34,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:24:34,924 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:24:34,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:24:35,022 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:24:35,022 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:24:35,023 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [123705449] [2022-02-11 00:24:35,023 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [123705449] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:24:35,023 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1244349818] [2022-02-11 00:24:35,023 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-11 00:24:35,023 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:24:35,023 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:24:35,024 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) [2022-02-11 00:24:35,025 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Waiting until timeout for monitored process [2022-02-11 00:24:35,067 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-11 00:24:35,067 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:24:35,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2022-02-11 00:24:35,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:24:35,246 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 96 treesize of output 80 [2022-02-11 00:24:35,248 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 80 treesize of output 64 [2022-02-11 00:24:35,328 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:24:35,329 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:24:35,453 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:24:35,454 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 65 treesize of output 61 [2022-02-11 00:24:35,460 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:24:35,460 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 53 treesize of output 49 [2022-02-11 00:24:35,567 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:24:35,567 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1244349818] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:24:35,567 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:24:35,567 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2022-02-11 00:24:35,568 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2029347679] [2022-02-11 00:24:35,568 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:24:35,568 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-11 00:24:35,568 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:24:35,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-11 00:24:35,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2022-02-11 00:24:35,568 INFO L87 Difference]: Start difference. First operand 184 states and 476 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:24:35,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:24:35,815 INFO L93 Difference]: Finished difference Result 250 states and 593 transitions. [2022-02-11 00:24:35,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-02-11 00:24:35,815 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-02-11 00:24:35,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:24:35,816 INFO L225 Difference]: With dead ends: 250 [2022-02-11 00:24:35,816 INFO L226 Difference]: Without dead ends: 248 [2022-02-11 00:24:35,816 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=96, Invalid=410, Unknown=0, NotChecked=0, Total=506 [2022-02-11 00:24:35,816 INFO L934 BasicCegarLoop]: 16 mSDtfsCounter, 87 mSDsluCounter, 232 mSDsCounter, 0 mSdLazyCounter, 392 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 143 SdHoareTripleChecker+Invalid, 416 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 392 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-11 00:24:35,816 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 143 Invalid, 416 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 392 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-11 00:24:35,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2022-02-11 00:24:35,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 180. [2022-02-11 00:24:35,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 179 states have (on average 2.5921787709497206) internal successors, (464), 179 states have internal predecessors, (464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:24:35,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 464 transitions. [2022-02-11 00:24:35,827 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 464 transitions. Word has length 17 [2022-02-11 00:24:35,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:24:35,827 INFO L470 AbstractCegarLoop]: Abstraction has 180 states and 464 transitions. [2022-02-11 00:24:35,827 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:24:35,827 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 464 transitions. [2022-02-11 00:24:35,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-11 00:24:35,828 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:24:35,828 INFO L515 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:24:35,846 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Forceful destruction successful, exit code 0 [2022-02-11 00:24:36,028 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112,105 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:24:36,028 INFO L402 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:24:36,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:24:36,029 INFO L85 PathProgramCache]: Analyzing trace with hash 199331879, now seen corresponding path program 105 times [2022-02-11 00:24:36,029 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:24:36,035 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [108569520] [2022-02-11 00:24:36,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:24:36,035 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:24:36,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:24:36,152 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:24:36,153 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:24:36,153 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [108569520] [2022-02-11 00:24:36,153 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [108569520] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:24:36,153 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1437290838] [2022-02-11 00:24:36,153 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-11 00:24:36,153 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:24:36,153 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:24:36,154 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) [2022-02-11 00:24:36,155 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Waiting until timeout for monitored process [2022-02-11 00:24:36,201 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-11 00:24:36,201 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:24:36,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2022-02-11 00:24:36,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:24:36,363 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 73 [2022-02-11 00:24:36,365 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 57 [2022-02-11 00:24:36,438 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:24:36,438 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:24:36,549 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:24:36,549 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 33 treesize of output 33 [2022-02-11 00:24:36,554 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:24:36,554 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 25 treesize of output 25 [2022-02-11 00:24:36,634 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:24:36,634 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1437290838] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:24:36,634 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:24:36,634 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2022-02-11 00:24:36,634 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1916872751] [2022-02-11 00:24:36,636 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:24:36,636 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-11 00:24:36,636 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:24:36,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-11 00:24:36,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=318, Unknown=0, NotChecked=0, Total=380 [2022-02-11 00:24:36,636 INFO L87 Difference]: Start difference. First operand 180 states and 464 transitions. Second operand has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:24:37,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:24:37,151 INFO L93 Difference]: Finished difference Result 292 states and 693 transitions. [2022-02-11 00:24:37,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-02-11 00:24:37,151 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-02-11 00:24:37,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:24:37,152 INFO L225 Difference]: With dead ends: 292 [2022-02-11 00:24:37,152 INFO L226 Difference]: Without dead ends: 290 [2022-02-11 00:24:37,152 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 212 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=194, Invalid=862, Unknown=0, NotChecked=0, Total=1056 [2022-02-11 00:24:37,152 INFO L934 BasicCegarLoop]: 10 mSDtfsCounter, 125 mSDsluCounter, 192 mSDsCounter, 0 mSdLazyCounter, 397 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 466 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 397 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-11 00:24:37,152 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [125 Valid, 103 Invalid, 466 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 397 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-11 00:24:37,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290 states. [2022-02-11 00:24:37,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290 to 189. [2022-02-11 00:24:37,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 188 states have (on average 2.595744680851064) internal successors, (488), 188 states have internal predecessors, (488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:24:37,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 488 transitions. [2022-02-11 00:24:37,158 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 488 transitions. Word has length 17 [2022-02-11 00:24:37,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:24:37,158 INFO L470 AbstractCegarLoop]: Abstraction has 189 states and 488 transitions. [2022-02-11 00:24:37,158 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:24:37,158 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 488 transitions. [2022-02-11 00:24:37,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-11 00:24:37,158 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:24:37,158 INFO L515 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:24:37,174 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Ended with exit code 0 [2022-02-11 00:24:37,359 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,SelfDestructingSolverStorable113 [2022-02-11 00:24:37,359 INFO L402 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:24:37,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:24:37,359 INFO L85 PathProgramCache]: Analyzing trace with hash -1949464657, now seen corresponding path program 106 times [2022-02-11 00:24:37,359 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:24:37,360 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [495067668] [2022-02-11 00:24:37,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:24:37,360 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:24:37,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:24:37,469 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:24:37,469 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:24:37,469 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [495067668] [2022-02-11 00:24:37,469 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [495067668] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:24:37,469 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [960049650] [2022-02-11 00:24:37,469 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-11 00:24:37,469 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:24:37,469 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:24:37,471 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) [2022-02-11 00:24:37,471 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Waiting until timeout for monitored process [2022-02-11 00:24:37,511 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-11 00:24:37,512 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:24:37,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2022-02-11 00:24:37,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:24:37,703 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:24:37,704 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:24:37,816 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:24:37,816 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 33 treesize of output 33 [2022-02-11 00:24:37,831 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:24:37,831 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 25 treesize of output 25 [2022-02-11 00:24:37,903 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:24:37,903 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [960049650] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:24:37,903 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:24:37,903 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2022-02-11 00:24:37,903 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1258501620] [2022-02-11 00:24:37,903 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:24:37,903 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-11 00:24:37,903 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:24:37,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-11 00:24:37,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2022-02-11 00:24:37,904 INFO L87 Difference]: Start difference. First operand 189 states and 488 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:24:38,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:24:38,165 INFO L93 Difference]: Finished difference Result 250 states and 612 transitions. [2022-02-11 00:24:38,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-02-11 00:24:38,166 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-02-11 00:24:38,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:24:38,166 INFO L225 Difference]: With dead ends: 250 [2022-02-11 00:24:38,166 INFO L226 Difference]: Without dead ends: 250 [2022-02-11 00:24:38,166 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=76, Invalid=386, Unknown=0, NotChecked=0, Total=462 [2022-02-11 00:24:38,166 INFO L934 BasicCegarLoop]: 9 mSDtfsCounter, 45 mSDsluCounter, 206 mSDsCounter, 0 mSdLazyCounter, 423 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 432 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 423 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-11 00:24:38,167 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 102 Invalid, 432 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 423 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-11 00:24:38,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2022-02-11 00:24:38,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 188. [2022-02-11 00:24:38,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 187 states have (on average 2.593582887700535) internal successors, (485), 187 states have internal predecessors, (485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:24:38,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 485 transitions. [2022-02-11 00:24:38,169 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 485 transitions. Word has length 17 [2022-02-11 00:24:38,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:24:38,169 INFO L470 AbstractCegarLoop]: Abstraction has 188 states and 485 transitions. [2022-02-11 00:24:38,169 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:24:38,169 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 485 transitions. [2022-02-11 00:24:38,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-11 00:24:38,169 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:24:38,169 INFO L515 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:24:38,186 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Forceful destruction successful, exit code 0 [2022-02-11 00:24:38,370 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 107 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2022-02-11 00:24:38,370 INFO L402 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:24:38,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:24:38,370 INFO L85 PathProgramCache]: Analyzing trace with hash 1085130159, now seen corresponding path program 107 times [2022-02-11 00:24:38,370 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:24:38,370 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [593571036] [2022-02-11 00:24:38,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:24:38,371 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:24:38,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:24:38,506 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:24:38,507 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:24:38,507 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [593571036] [2022-02-11 00:24:38,507 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [593571036] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:24:38,507 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1930366461] [2022-02-11 00:24:38,507 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-11 00:24:38,507 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:24:38,507 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:24:38,512 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) [2022-02-11 00:24:38,535 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Waiting until timeout for monitored process [2022-02-11 00:24:38,585 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-02-11 00:24:38,585 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:24:38,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2022-02-11 00:24:38,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:24:38,825 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 87 treesize of output 71 [2022-02-11 00:24:38,829 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 55 [2022-02-11 00:24:38,931 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:24:38,931 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:24:39,089 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:24:39,090 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 41 treesize of output 39 [2022-02-11 00:24:39,095 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:24:39,096 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 29 treesize of output 27 [2022-02-11 00:24:39,156 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:24:39,156 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1930366461] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:24:39,156 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:24:39,156 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2022-02-11 00:24:39,156 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213025775] [2022-02-11 00:24:39,156 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:24:39,157 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-11 00:24:39,157 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:24:39,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-11 00:24:39,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2022-02-11 00:24:39,157 INFO L87 Difference]: Start difference. First operand 188 states and 485 transitions. Second operand has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:24:39,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:24:39,368 INFO L93 Difference]: Finished difference Result 238 states and 578 transitions. [2022-02-11 00:24:39,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-11 00:24:39,369 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-02-11 00:24:39,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:24:39,369 INFO L225 Difference]: With dead ends: 238 [2022-02-11 00:24:39,369 INFO L226 Difference]: Without dead ends: 236 [2022-02-11 00:24:39,369 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2022-02-11 00:24:39,370 INFO L934 BasicCegarLoop]: 12 mSDtfsCounter, 91 mSDsluCounter, 258 mSDsCounter, 0 mSdLazyCounter, 442 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 458 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 442 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-11 00:24:39,370 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [91 Valid, 142 Invalid, 458 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 442 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-11 00:24:39,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2022-02-11 00:24:39,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 190. [2022-02-11 00:24:39,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 190 states, 189 states have (on average 2.6031746031746033) internal successors, (492), 189 states have internal predecessors, (492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:24:39,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 492 transitions. [2022-02-11 00:24:39,372 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 492 transitions. Word has length 17 [2022-02-11 00:24:39,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:24:39,372 INFO L470 AbstractCegarLoop]: Abstraction has 190 states and 492 transitions. [2022-02-11 00:24:39,372 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:24:39,372 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 492 transitions. [2022-02-11 00:24:39,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-11 00:24:39,373 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:24:39,373 INFO L515 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:24:39,397 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Ended with exit code 0 [2022-02-11 00:24:39,573 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115,108 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:24:39,573 INFO L402 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:24:39,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:24:39,573 INFO L85 PathProgramCache]: Analyzing trace with hash -1063666377, now seen corresponding path program 108 times [2022-02-11 00:24:39,574 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:24:39,574 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [18592043] [2022-02-11 00:24:39,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:24:39,574 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:24:39,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:24:39,704 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:24:39,704 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:24:39,704 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [18592043] [2022-02-11 00:24:39,704 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [18592043] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:24:39,704 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1872810384] [2022-02-11 00:24:39,704 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-11 00:24:39,704 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:24:39,704 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:24:39,705 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) [2022-02-11 00:24:39,706 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Waiting until timeout for monitored process [2022-02-11 00:24:39,749 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-11 00:24:39,749 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:24:39,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2022-02-11 00:24:39,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:24:39,967 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:24:39,968 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:24:40,144 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:24:40,144 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 42 treesize of output 40 [2022-02-11 00:24:40,150 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:24:40,150 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 30 treesize of output 28 [2022-02-11 00:24:40,223 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:24:40,223 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1872810384] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:24:40,224 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:24:40,224 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2022-02-11 00:24:40,224 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [93863616] [2022-02-11 00:24:40,224 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:24:40,224 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-11 00:24:40,224 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:24:40,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-11 00:24:40,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=320, Unknown=0, NotChecked=0, Total=380 [2022-02-11 00:24:40,225 INFO L87 Difference]: Start difference. First operand 190 states and 492 transitions. Second operand has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:24:40,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:24:40,392 INFO L93 Difference]: Finished difference Result 229 states and 568 transitions. [2022-02-11 00:24:40,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-11 00:24:40,395 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-02-11 00:24:40,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:24:40,396 INFO L225 Difference]: With dead ends: 229 [2022-02-11 00:24:40,396 INFO L226 Difference]: Without dead ends: 229 [2022-02-11 00:24:40,396 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=60, Invalid=320, Unknown=0, NotChecked=0, Total=380 [2022-02-11 00:24:40,396 INFO L934 BasicCegarLoop]: 10 mSDtfsCounter, 51 mSDsluCounter, 208 mSDsCounter, 0 mSdLazyCounter, 370 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 378 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 370 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-11 00:24:40,397 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 108 Invalid, 378 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 370 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-11 00:24:40,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2022-02-11 00:24:40,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 189. [2022-02-11 00:24:40,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 188 states have (on average 2.606382978723404) internal successors, (490), 188 states have internal predecessors, (490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:24:40,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 490 transitions. [2022-02-11 00:24:40,399 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 490 transitions. Word has length 17 [2022-02-11 00:24:40,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:24:40,400 INFO L470 AbstractCegarLoop]: Abstraction has 189 states and 490 transitions. [2022-02-11 00:24:40,400 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:24:40,400 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 490 transitions. [2022-02-11 00:24:40,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-11 00:24:40,400 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:24:40,400 INFO L515 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:24:40,419 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Forceful destruction successful, exit code 0 [2022-02-11 00:24:40,600 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116,109 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:24:40,601 INFO L402 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:24:40,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:24:40,601 INFO L85 PathProgramCache]: Analyzing trace with hash -1330781111, now seen corresponding path program 109 times [2022-02-11 00:24:40,601 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:24:40,601 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2102400797] [2022-02-11 00:24:40,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:24:40,601 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:24:40,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:24:40,690 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:24:40,690 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:24:40,690 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2102400797] [2022-02-11 00:24:40,690 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2102400797] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:24:40,690 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1349565452] [2022-02-11 00:24:40,690 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-11 00:24:40,690 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:24:40,690 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:24:40,691 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) [2022-02-11 00:24:40,692 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Waiting until timeout for monitored process [2022-02-11 00:24:40,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:24:40,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2022-02-11 00:24:40,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:24:40,963 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 51 [2022-02-11 00:24:40,965 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 39 [2022-02-11 00:24:40,987 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:24:40,987 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:24:41,079 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:24:41,079 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 71 treesize of output 65 [2022-02-11 00:24:41,087 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:24:41,087 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 55 treesize of output 49 [2022-02-11 00:24:41,192 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:24:41,192 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1349565452] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:24:41,192 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:24:41,192 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2022-02-11 00:24:41,192 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692895768] [2022-02-11 00:24:41,192 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:24:41,192 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-11 00:24:41,192 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:24:41,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-11 00:24:41,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2022-02-11 00:24:41,193 INFO L87 Difference]: Start difference. First operand 189 states and 490 transitions. Second operand has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 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) [2022-02-11 00:24:41,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:24:41,459 INFO L93 Difference]: Finished difference Result 206 states and 517 transitions. [2022-02-11 00:24:41,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-11 00:24:41,459 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 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 17 [2022-02-11 00:24:41,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:24:41,460 INFO L225 Difference]: With dead ends: 206 [2022-02-11 00:24:41,460 INFO L226 Difference]: Without dead ends: 197 [2022-02-11 00:24:41,460 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=108, Invalid=492, Unknown=0, NotChecked=0, Total=600 [2022-02-11 00:24:41,460 INFO L934 BasicCegarLoop]: 9 mSDtfsCounter, 67 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 195 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 209 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 195 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-11 00:24:41,460 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 60 Invalid, 209 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 195 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-11 00:24:41,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2022-02-11 00:24:41,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 189. [2022-02-11 00:24:41,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 188 states have (on average 2.601063829787234) internal successors, (489), 188 states have internal predecessors, (489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:24:41,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 489 transitions. [2022-02-11 00:24:41,462 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 489 transitions. Word has length 17 [2022-02-11 00:24:41,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:24:41,462 INFO L470 AbstractCegarLoop]: Abstraction has 189 states and 489 transitions. [2022-02-11 00:24:41,463 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 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) [2022-02-11 00:24:41,463 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 489 transitions. [2022-02-11 00:24:41,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-11 00:24:41,463 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:24:41,463 INFO L515 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:24:41,479 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Ended with exit code 0 [2022-02-11 00:24:41,663 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,SelfDestructingSolverStorable117 [2022-02-11 00:24:41,663 INFO L402 AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:24:41,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:24:41,664 INFO L85 PathProgramCache]: Analyzing trace with hash 1043117743, now seen corresponding path program 110 times [2022-02-11 00:24:41,664 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:24:41,664 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1541697813] [2022-02-11 00:24:41,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:24:41,664 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:24:41,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:24:41,763 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:24:41,764 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:24:41,764 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1541697813] [2022-02-11 00:24:41,764 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1541697813] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:24:41,764 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [140769025] [2022-02-11 00:24:41,764 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-11 00:24:41,764 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:24:41,764 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:24:41,765 INFO L229 MonitoredProcess]: Starting monitored process 111 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:24:41,791 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Waiting until timeout for monitored process [2022-02-11 00:24:41,813 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-11 00:24:41,813 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:24:41,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 25 conjunts are in the unsatisfiable core [2022-02-11 00:24:41,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:24:42,008 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:24:42,008 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:24:42,169 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:24:42,170 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 43 treesize of output 41 [2022-02-11 00:24:42,175 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:24:42,176 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 31 treesize of output 29 [2022-02-11 00:24:42,231 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:24:42,232 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [140769025] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:24:42,232 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:24:42,232 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 21 [2022-02-11 00:24:42,232 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1916075623] [2022-02-11 00:24:42,232 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:24:42,232 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-11 00:24:42,232 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:24:42,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-11 00:24:42,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2022-02-11 00:24:42,232 INFO L87 Difference]: Start difference. First operand 189 states and 489 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:24:42,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:24:42,503 INFO L93 Difference]: Finished difference Result 217 states and 544 transitions. [2022-02-11 00:24:42,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-11 00:24:42,503 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-02-11 00:24:42,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:24:42,503 INFO L225 Difference]: With dead ends: 217 [2022-02-11 00:24:42,503 INFO L226 Difference]: Without dead ends: 217 [2022-02-11 00:24:42,504 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=88, Invalid=512, Unknown=0, NotChecked=0, Total=600 [2022-02-11 00:24:42,504 INFO L934 BasicCegarLoop]: 8 mSDtfsCounter, 47 mSDsluCounter, 256 mSDsCounter, 0 mSdLazyCounter, 447 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 454 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 447 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-11 00:24:42,504 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 120 Invalid, 454 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 447 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-11 00:24:42,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2022-02-11 00:24:42,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 185. [2022-02-11 00:24:42,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 184 states have (on average 2.597826086956522) internal successors, (478), 184 states have internal predecessors, (478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:24:42,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 478 transitions. [2022-02-11 00:24:42,506 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 478 transitions. Word has length 17 [2022-02-11 00:24:42,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:24:42,506 INFO L470 AbstractCegarLoop]: Abstraction has 185 states and 478 transitions. [2022-02-11 00:24:42,506 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:24:42,506 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 478 transitions. [2022-02-11 00:24:42,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-11 00:24:42,507 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:24:42,507 INFO L515 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:24:42,523 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Ended with exit code 0 [2022-02-11 00:24:42,707 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable118 [2022-02-11 00:24:42,707 INFO L402 AbstractCegarLoop]: === Iteration 120 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:24:42,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:24:42,707 INFO L85 PathProgramCache]: Analyzing trace with hash 1930101611, now seen corresponding path program 111 times [2022-02-11 00:24:42,707 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:24:42,708 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1466241044] [2022-02-11 00:24:42,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:24:42,708 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:24:42,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:24:42,803 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:24:42,804 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:24:42,804 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1466241044] [2022-02-11 00:24:42,804 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1466241044] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:24:42,804 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1066330649] [2022-02-11 00:24:42,804 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-11 00:24:42,804 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:24:42,804 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:24:42,805 INFO L229 MonitoredProcess]: Starting monitored process 112 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:24:42,805 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Waiting until timeout for monitored process [2022-02-11 00:24:42,848 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-02-11 00:24:42,848 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:24:42,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2022-02-11 00:24:42,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:24:43,028 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 87 treesize of output 71 [2022-02-11 00:24:43,030 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 55 [2022-02-11 00:24:43,100 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:24:43,100 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:24:43,253 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-11 00:24:43,253 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 30 treesize of output 25 [2022-02-11 00:24:43,271 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:24:43,271 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1066330649] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:24:43,271 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:24:43,271 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2022-02-11 00:24:43,271 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138807339] [2022-02-11 00:24:43,272 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:24:43,272 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-11 00:24:43,272 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:24:43,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-11 00:24:43,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2022-02-11 00:24:43,272 INFO L87 Difference]: Start difference. First operand 185 states and 478 transitions. Second operand has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:24:43,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:24:43,532 INFO L93 Difference]: Finished difference Result 257 states and 612 transitions. [2022-02-11 00:24:43,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-02-11 00:24:43,532 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-02-11 00:24:43,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:24:43,533 INFO L225 Difference]: With dead ends: 257 [2022-02-11 00:24:43,533 INFO L226 Difference]: Without dead ends: 255 [2022-02-11 00:24:43,533 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=104, Invalid=496, Unknown=0, NotChecked=0, Total=600 [2022-02-11 00:24:43,533 INFO L934 BasicCegarLoop]: 15 mSDtfsCounter, 99 mSDsluCounter, 257 mSDsCounter, 0 mSdLazyCounter, 401 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 419 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 401 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-11 00:24:43,533 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 140 Invalid, 419 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 401 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-11 00:24:43,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2022-02-11 00:24:43,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 187. [2022-02-11 00:24:43,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 186 states have (on average 2.60752688172043) internal successors, (485), 186 states have internal predecessors, (485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:24:43,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 485 transitions. [2022-02-11 00:24:43,536 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 485 transitions. Word has length 17 [2022-02-11 00:24:43,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:24:43,536 INFO L470 AbstractCegarLoop]: Abstraction has 187 states and 485 transitions. [2022-02-11 00:24:43,536 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:24:43,536 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 485 transitions. [2022-02-11 00:24:43,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-11 00:24:43,536 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:24:43,536 INFO L515 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:24:43,557 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Ended with exit code 0 [2022-02-11 00:24:43,737 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119,112 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:24:43,737 INFO L402 AbstractCegarLoop]: === Iteration 121 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:24:43,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:24:43,737 INFO L85 PathProgramCache]: Analyzing trace with hash -218694925, now seen corresponding path program 112 times [2022-02-11 00:24:43,737 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:24:43,737 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2132174485] [2022-02-11 00:24:43,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:24:43,737 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:24:43,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:24:43,834 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:24:43,834 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:24:43,834 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2132174485] [2022-02-11 00:24:43,835 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2132174485] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:24:43,835 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1082174758] [2022-02-11 00:24:43,835 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-11 00:24:43,835 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:24:43,835 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:24:43,836 INFO L229 MonitoredProcess]: Starting monitored process 113 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:24:43,837 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (113)] Waiting until timeout for monitored process [2022-02-11 00:24:43,879 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-11 00:24:43,879 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:24:43,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2022-02-11 00:24:43,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:24:44,126 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:24:44,126 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:24:44,296 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-11 00:24:44,297 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 30 treesize of output 25 [2022-02-11 00:24:44,316 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:24:44,316 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1082174758] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:24:44,316 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:24:44,316 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2022-02-11 00:24:44,316 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830884388] [2022-02-11 00:24:44,316 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:24:44,317 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-11 00:24:44,317 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:24:44,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-11 00:24:44,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2022-02-11 00:24:44,317 INFO L87 Difference]: Start difference. First operand 187 states and 485 transitions. Second operand has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:24:44,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:24:44,530 INFO L93 Difference]: Finished difference Result 251 states and 607 transitions. [2022-02-11 00:24:44,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-11 00:24:44,530 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-02-11 00:24:44,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:24:44,531 INFO L225 Difference]: With dead ends: 251 [2022-02-11 00:24:44,531 INFO L226 Difference]: Without dead ends: 251 [2022-02-11 00:24:44,531 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=86, Invalid=420, Unknown=0, NotChecked=0, Total=506 [2022-02-11 00:24:44,531 INFO L934 BasicCegarLoop]: 13 mSDtfsCounter, 67 mSDsluCounter, 261 mSDsCounter, 0 mSdLazyCounter, 398 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 408 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 398 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-11 00:24:44,531 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 128 Invalid, 408 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 398 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-11 00:24:44,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2022-02-11 00:24:44,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 186. [2022-02-11 00:24:44,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 185 states have (on average 2.610810810810811) internal successors, (483), 185 states have internal predecessors, (483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:24:44,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 483 transitions. [2022-02-11 00:24:44,534 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 483 transitions. Word has length 17 [2022-02-11 00:24:44,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:24:44,534 INFO L470 AbstractCegarLoop]: Abstraction has 186 states and 483 transitions. [2022-02-11 00:24:44,534 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:24:44,534 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 483 transitions. [2022-02-11 00:24:44,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-11 00:24:44,534 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:24:44,534 INFO L515 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:24:44,551 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (113)] Forceful destruction successful, exit code 0 [2022-02-11 00:24:44,735 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable120 [2022-02-11 00:24:44,735 INFO L402 AbstractCegarLoop]: === Iteration 122 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:24:44,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:24:44,735 INFO L85 PathProgramCache]: Analyzing trace with hash 1888089195, now seen corresponding path program 113 times [2022-02-11 00:24:44,735 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:24:44,735 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [215995242] [2022-02-11 00:24:44,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:24:44,735 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:24:44,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:24:44,824 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:24:44,825 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:24:44,825 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [215995242] [2022-02-11 00:24:44,825 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [215995242] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:24:44,825 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [915412314] [2022-02-11 00:24:44,825 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-11 00:24:44,825 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:24:44,825 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:24:44,826 INFO L229 MonitoredProcess]: Starting monitored process 114 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:24:44,827 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (114)] Waiting until timeout for monitored process [2022-02-11 00:24:44,868 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-11 00:24:44,869 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:24:44,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2022-02-11 00:24:44,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:24:45,053 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:24:45,053 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:24:45,221 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-11 00:24:45,221 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 30 treesize of output 25 [2022-02-11 00:24:45,243 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:24:45,244 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [915412314] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:24:45,244 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:24:45,244 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 21 [2022-02-11 00:24:45,244 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [365757614] [2022-02-11 00:24:45,244 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:24:45,244 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-11 00:24:45,244 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:24:45,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-11 00:24:45,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2022-02-11 00:24:45,244 INFO L87 Difference]: Start difference. First operand 186 states and 483 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:24:45,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:24:45,730 INFO L93 Difference]: Finished difference Result 266 states and 636 transitions. [2022-02-11 00:24:45,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-11 00:24:45,730 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-02-11 00:24:45,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:24:45,731 INFO L225 Difference]: With dead ends: 266 [2022-02-11 00:24:45,731 INFO L226 Difference]: Without dead ends: 266 [2022-02-11 00:24:45,731 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=155, Invalid=837, Unknown=0, NotChecked=0, Total=992 [2022-02-11 00:24:45,731 INFO L934 BasicCegarLoop]: 13 mSDtfsCounter, 88 mSDsluCounter, 305 mSDsCounter, 0 mSdLazyCounter, 492 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 150 SdHoareTripleChecker+Invalid, 505 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 492 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-11 00:24:45,731 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [88 Valid, 150 Invalid, 505 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 492 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-11 00:24:45,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2022-02-11 00:24:45,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 183. [2022-02-11 00:24:45,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 182 states have (on average 2.6043956043956045) internal successors, (474), 182 states have internal predecessors, (474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:24:45,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 474 transitions. [2022-02-11 00:24:45,734 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 474 transitions. Word has length 17 [2022-02-11 00:24:45,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:24:45,734 INFO L470 AbstractCegarLoop]: Abstraction has 183 states and 474 transitions. [2022-02-11 00:24:45,734 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:24:45,734 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 474 transitions. [2022-02-11 00:24:45,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-11 00:24:45,734 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:24:45,734 INFO L515 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:24:45,750 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (114)] Ended with exit code 0 [2022-02-11 00:24:45,935 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,114 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:24:45,935 INFO L402 AbstractCegarLoop]: === Iteration 123 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:24:45,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:24:45,936 INFO L85 PathProgramCache]: Analyzing trace with hash -1963978961, now seen corresponding path program 114 times [2022-02-11 00:24:45,936 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:24:45,936 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [396695972] [2022-02-11 00:24:45,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:24:45,936 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:24:45,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:24:46,026 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:24:46,027 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:24:46,027 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [396695972] [2022-02-11 00:24:46,027 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [396695972] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:24:46,027 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [157068723] [2022-02-11 00:24:46,027 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-11 00:24:46,027 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:24:46,027 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:24:46,029 INFO L229 MonitoredProcess]: Starting monitored process 115 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:24:46,029 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (115)] Waiting until timeout for monitored process [2022-02-11 00:24:46,082 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-11 00:24:46,083 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:24:46,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2022-02-11 00:24:46,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:24:46,257 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:24:46,257 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:24:46,408 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-11 00:24:46,408 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 27 [2022-02-11 00:24:46,426 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:24:46,426 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [157068723] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:24:46,426 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:24:46,426 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2022-02-11 00:24:46,426 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [609433168] [2022-02-11 00:24:46,426 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:24:46,426 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-11 00:24:46,426 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:24:46,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-11 00:24:46,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=325, Unknown=0, NotChecked=0, Total=380 [2022-02-11 00:24:46,427 INFO L87 Difference]: Start difference. First operand 183 states and 474 transitions. Second operand has 20 states, 20 states have (on average 1.6) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:24:46,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:24:46,765 INFO L93 Difference]: Finished difference Result 251 states and 603 transitions. [2022-02-11 00:24:46,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-11 00:24:46,765 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.6) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-02-11 00:24:46,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:24:46,765 INFO L225 Difference]: With dead ends: 251 [2022-02-11 00:24:46,765 INFO L226 Difference]: Without dead ends: 251 [2022-02-11 00:24:46,766 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=110, Invalid=592, Unknown=0, NotChecked=0, Total=702 [2022-02-11 00:24:46,766 INFO L934 BasicCegarLoop]: 14 mSDtfsCounter, 91 mSDsluCounter, 321 mSDsCounter, 0 mSdLazyCounter, 496 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 503 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 496 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-11 00:24:46,766 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [91 Valid, 153 Invalid, 503 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 496 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-11 00:24:46,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2022-02-11 00:24:46,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 183. [2022-02-11 00:24:46,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 182 states have (on average 2.6043956043956045) internal successors, (474), 182 states have internal predecessors, (474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:24:46,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 474 transitions. [2022-02-11 00:24:46,768 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 474 transitions. Word has length 17 [2022-02-11 00:24:46,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:24:46,768 INFO L470 AbstractCegarLoop]: Abstraction has 183 states and 474 transitions. [2022-02-11 00:24:46,768 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.6) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:24:46,768 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 474 transitions. [2022-02-11 00:24:46,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-02-11 00:24:46,769 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:24:46,769 INFO L515 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:24:46,790 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (115)] Ended with exit code 0 [2022-02-11 00:24:46,969 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 115 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable122 [2022-02-11 00:24:46,969 INFO L402 AbstractCegarLoop]: === Iteration 124 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:24:46,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:24:46,970 INFO L85 PathProgramCache]: Analyzing trace with hash 895555855, now seen corresponding path program 115 times [2022-02-11 00:24:46,970 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:24:46,970 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [586386455] [2022-02-11 00:24:46,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:24:46,970 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:24:46,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:24:47,237 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:24:47,238 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:24:47,238 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [586386455] [2022-02-11 00:24:47,238 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [586386455] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:24:47,238 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1385811285] [2022-02-11 00:24:47,238 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-11 00:24:47,238 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:24:47,238 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:24:47,239 INFO L229 MonitoredProcess]: Starting monitored process 116 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:24:47,239 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (116)] Waiting until timeout for monitored process [2022-02-11 00:24:47,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:24:47,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 39 conjunts are in the unsatisfiable core [2022-02-11 00:24:47,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:24:47,630 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 61 [2022-02-11 00:24:47,632 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 49 [2022-02-11 00:24:47,742 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:24:47,743 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:24:48,126 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-11 00:24:48,126 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 117 treesize of output 100 [2022-02-11 00:24:48,129 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 97 treesize of output 77 [2022-02-11 00:24:48,245 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:24:48,245 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1385811285] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:24:48,245 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:24:48,246 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 29 [2022-02-11 00:24:48,246 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130721914] [2022-02-11 00:24:48,246 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:24:48,246 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-02-11 00:24:48,246 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:24:48,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-02-11 00:24:48,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=722, Unknown=0, NotChecked=0, Total=812 [2022-02-11 00:24:48,246 INFO L87 Difference]: Start difference. First operand 183 states and 474 transitions. Second operand has 29 states, 29 states have (on average 1.4482758620689655) internal successors, (42), 29 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:24:49,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:24:49,733 INFO L93 Difference]: Finished difference Result 329 states and 774 transitions. [2022-02-11 00:24:49,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-02-11 00:24:49,733 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.4482758620689655) internal successors, (42), 29 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-02-11 00:24:49,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:24:49,734 INFO L225 Difference]: With dead ends: 329 [2022-02-11 00:24:49,734 INFO L226 Difference]: Without dead ends: 305 [2022-02-11 00:24:49,734 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 468 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=372, Invalid=2078, Unknown=0, NotChecked=0, Total=2450 [2022-02-11 00:24:49,734 INFO L934 BasicCegarLoop]: 18 mSDtfsCounter, 212 mSDsluCounter, 750 mSDsCounter, 0 mSdLazyCounter, 1249 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 212 SdHoareTripleChecker+Valid, 354 SdHoareTripleChecker+Invalid, 1305 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 1249 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-11 00:24:49,734 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [212 Valid, 354 Invalid, 1305 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 1249 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-11 00:24:49,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 305 states. [2022-02-11 00:24:49,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 305 to 187. [2022-02-11 00:24:49,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 186 states have (on average 2.6021505376344085) internal successors, (484), 186 states have internal predecessors, (484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:24:49,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 484 transitions. [2022-02-11 00:24:49,737 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 484 transitions. Word has length 18 [2022-02-11 00:24:49,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:24:49,737 INFO L470 AbstractCegarLoop]: Abstraction has 187 states and 484 transitions. [2022-02-11 00:24:49,737 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.4482758620689655) internal successors, (42), 29 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:24:49,737 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 484 transitions. [2022-02-11 00:24:49,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-02-11 00:24:49,737 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:24:49,737 INFO L515 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:24:49,754 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (116)] Ended with exit code 0 [2022-02-11 00:24:49,938 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable123 [2022-02-11 00:24:49,938 INFO L402 AbstractCegarLoop]: === Iteration 125 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:24:49,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:24:49,938 INFO L85 PathProgramCache]: Analyzing trace with hash 708397503, now seen corresponding path program 116 times [2022-02-11 00:24:49,938 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:24:49,938 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [90260140] [2022-02-11 00:24:49,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:24:49,938 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:24:49,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:24:50,211 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:24:50,212 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:24:50,212 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [90260140] [2022-02-11 00:24:50,212 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [90260140] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:24:50,212 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1489392697] [2022-02-11 00:24:50,212 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-11 00:24:50,212 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:24:50,212 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:24:50,213 INFO L229 MonitoredProcess]: Starting monitored process 117 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:24:50,248 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (117)] Waiting until timeout for monitored process [2022-02-11 00:24:50,299 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-11 00:24:50,299 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:24:50,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2022-02-11 00:24:50,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:24:50,761 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 59 [2022-02-11 00:24:50,763 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 47 [2022-02-11 00:24:50,877 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:24:50,878 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:24:51,319 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-02-11 00:24:51,320 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 144 treesize of output 117 [2022-02-11 00:24:51,324 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 112 treesize of output 80 [2022-02-11 00:24:51,461 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:24:51,461 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1489392697] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:24:51,461 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:24:51,462 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 30 [2022-02-11 00:24:51,462 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [841747843] [2022-02-11 00:24:51,462 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:24:51,462 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-11 00:24:51,462 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:24:51,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-11 00:24:51,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=778, Unknown=0, NotChecked=0, Total=870 [2022-02-11 00:24:51,462 INFO L87 Difference]: Start difference. First operand 187 states and 484 transitions. Second operand has 30 states, 30 states have (on average 1.4333333333333333) internal successors, (43), 30 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) [2022-02-11 00:24:52,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:24:52,187 INFO L93 Difference]: Finished difference Result 261 states and 613 transitions. [2022-02-11 00:24:52,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-02-11 00:24:52,187 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.4333333333333333) internal successors, (43), 30 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 18 [2022-02-11 00:24:52,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:24:52,188 INFO L225 Difference]: With dead ends: 261 [2022-02-11 00:24:52,188 INFO L226 Difference]: Without dead ends: 239 [2022-02-11 00:24:52,188 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 220 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=199, Invalid=1441, Unknown=0, NotChecked=0, Total=1640 [2022-02-11 00:24:52,188 INFO L934 BasicCegarLoop]: 17 mSDtfsCounter, 137 mSDsluCounter, 467 mSDsCounter, 0 mSdLazyCounter, 807 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 268 SdHoareTripleChecker+Invalid, 862 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 807 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-11 00:24:52,188 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [137 Valid, 268 Invalid, 862 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 807 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-11 00:24:52,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2022-02-11 00:24:52,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 192. [2022-02-11 00:24:52,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 191 states have (on average 2.586387434554974) internal successors, (494), 191 states have internal predecessors, (494), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:24:52,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 494 transitions. [2022-02-11 00:24:52,190 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 494 transitions. Word has length 18 [2022-02-11 00:24:52,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:24:52,191 INFO L470 AbstractCegarLoop]: Abstraction has 192 states and 494 transitions. [2022-02-11 00:24:52,191 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.4333333333333333) internal successors, (43), 30 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) [2022-02-11 00:24:52,191 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 494 transitions. [2022-02-11 00:24:52,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-02-11 00:24:52,191 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:24:52,191 INFO L515 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:24:52,207 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (117)] Ended with exit code 0 [2022-02-11 00:24:52,391 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 117 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable124 [2022-02-11 00:24:52,392 INFO L402 AbstractCegarLoop]: === Iteration 126 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:24:52,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:24:52,392 INFO L85 PathProgramCache]: Analyzing trace with hash 1749973571, now seen corresponding path program 117 times [2022-02-11 00:24:52,392 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:24:52,392 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [896010439] [2022-02-11 00:24:52,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:24:52,392 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:24:52,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:24:52,650 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:24:52,650 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:24:52,651 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [896010439] [2022-02-11 00:24:52,651 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [896010439] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:24:52,651 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1690609308] [2022-02-11 00:24:52,651 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-11 00:24:52,651 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:24:52,651 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:24:52,655 INFO L229 MonitoredProcess]: Starting monitored process 118 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:24:52,656 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (118)] Waiting until timeout for monitored process [2022-02-11 00:24:52,701 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-11 00:24:52,702 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:24:52,702 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 43 conjunts are in the unsatisfiable core [2022-02-11 00:24:52,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:24:53,293 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 85 treesize of output 69 [2022-02-11 00:24:53,296 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 45 [2022-02-11 00:24:53,410 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:24:53,411 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:24:54,209 INFO L353 Elim1Store]: treesize reduction 22, result has 24.1 percent of original size [2022-02-11 00:24:54,210 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 99 treesize of output 77 [2022-02-11 00:24:54,212 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:24:54,213 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 36 [2022-02-11 00:24:54,248 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:24:54,248 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1690609308] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:24:54,248 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:24:54,248 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 31 [2022-02-11 00:24:54,248 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1103372518] [2022-02-11 00:24:54,248 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:24:54,249 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-02-11 00:24:54,249 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:24:54,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-02-11 00:24:54,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=824, Unknown=0, NotChecked=0, Total=930 [2022-02-11 00:24:54,249 INFO L87 Difference]: Start difference. First operand 192 states and 494 transitions. Second operand has 31 states, 31 states have (on average 1.4193548387096775) internal successors, (44), 31 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:24:56,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:24:56,807 INFO L93 Difference]: Finished difference Result 380 states and 854 transitions. [2022-02-11 00:24:56,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-02-11 00:24:56,808 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.4193548387096775) internal successors, (44), 31 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-02-11 00:24:56,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:24:56,808 INFO L225 Difference]: With dead ends: 380 [2022-02-11 00:24:56,809 INFO L226 Difference]: Without dead ends: 346 [2022-02-11 00:24:56,809 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 756 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=438, Invalid=3344, Unknown=0, NotChecked=0, Total=3782 [2022-02-11 00:24:56,809 INFO L934 BasicCegarLoop]: 21 mSDtfsCounter, 143 mSDsluCounter, 586 mSDsCounter, 0 mSdLazyCounter, 931 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 368 SdHoareTripleChecker+Invalid, 995 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 931 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-11 00:24:56,809 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [143 Valid, 368 Invalid, 995 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 931 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-11 00:24:56,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 346 states. [2022-02-11 00:24:56,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 346 to 197. [2022-02-11 00:24:56,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 196 states have (on average 2.5918367346938775) internal successors, (508), 196 states have internal predecessors, (508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:24:56,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 508 transitions. [2022-02-11 00:24:56,812 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 508 transitions. Word has length 18 [2022-02-11 00:24:56,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:24:56,812 INFO L470 AbstractCegarLoop]: Abstraction has 197 states and 508 transitions. [2022-02-11 00:24:56,812 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.4193548387096775) internal successors, (44), 31 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:24:56,812 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 508 transitions. [2022-02-11 00:24:56,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-02-11 00:24:56,813 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:24:56,813 INFO L515 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:24:56,830 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (118)] Forceful destruction successful, exit code 0 [2022-02-11 00:24:57,027 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 118 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2022-02-11 00:24:57,027 INFO L402 AbstractCegarLoop]: === Iteration 127 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:24:57,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:24:57,028 INFO L85 PathProgramCache]: Analyzing trace with hash 1783572799, now seen corresponding path program 118 times [2022-02-11 00:24:57,028 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:24:57,028 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [180785855] [2022-02-11 00:24:57,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:24:57,028 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:24:57,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:24:57,315 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:24:57,315 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:24:57,315 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [180785855] [2022-02-11 00:24:57,315 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [180785855] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:24:57,315 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [244229776] [2022-02-11 00:24:57,315 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-11 00:24:57,316 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:24:57,316 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:24:57,316 INFO L229 MonitoredProcess]: Starting monitored process 119 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:24:57,317 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (119)] Waiting until timeout for monitored process [2022-02-11 00:24:57,361 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-11 00:24:57,361 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:24:57,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2022-02-11 00:24:57,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:24:57,807 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 57 [2022-02-11 00:24:57,809 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 45 [2022-02-11 00:24:57,921 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:24:57,921 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:24:58,405 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-02-11 00:24:58,405 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 147 treesize of output 120 [2022-02-11 00:24:58,409 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 115 treesize of output 83 [2022-02-11 00:24:58,588 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:24:58,588 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [244229776] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:24:58,588 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:24:58,588 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 30 [2022-02-11 00:24:58,588 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [517373234] [2022-02-11 00:24:58,589 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:24:58,589 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-11 00:24:58,589 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:24:58,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-11 00:24:58,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=779, Unknown=0, NotChecked=0, Total=870 [2022-02-11 00:24:58,589 INFO L87 Difference]: Start difference. First operand 197 states and 508 transitions. Second operand has 30 states, 30 states have (on average 1.4333333333333333) internal successors, (43), 30 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) [2022-02-11 00:25:00,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:25:00,483 INFO L93 Difference]: Finished difference Result 345 states and 764 transitions. [2022-02-11 00:25:00,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-02-11 00:25:00,483 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.4333333333333333) internal successors, (43), 30 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 18 [2022-02-11 00:25:00,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:25:00,484 INFO L225 Difference]: With dead ends: 345 [2022-02-11 00:25:00,484 INFO L226 Difference]: Without dead ends: 313 [2022-02-11 00:25:00,484 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 469 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=384, Invalid=2372, Unknown=0, NotChecked=0, Total=2756 [2022-02-11 00:25:00,484 INFO L934 BasicCegarLoop]: 19 mSDtfsCounter, 284 mSDsluCounter, 637 mSDsCounter, 0 mSdLazyCounter, 1022 mSolverCounterSat, 114 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 284 SdHoareTripleChecker+Valid, 372 SdHoareTripleChecker+Invalid, 1136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 114 IncrementalHoareTripleChecker+Valid, 1022 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-11 00:25:00,485 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [284 Valid, 372 Invalid, 1136 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [114 Valid, 1022 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-11 00:25:00,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 313 states. [2022-02-11 00:25:00,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 313 to 201. [2022-02-11 00:25:00,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 200 states have (on average 2.61) internal successors, (522), 200 states have internal predecessors, (522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:25:00,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 522 transitions. [2022-02-11 00:25:00,487 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 522 transitions. Word has length 18 [2022-02-11 00:25:00,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:25:00,487 INFO L470 AbstractCegarLoop]: Abstraction has 201 states and 522 transitions. [2022-02-11 00:25:00,487 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.4333333333333333) internal successors, (43), 30 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) [2022-02-11 00:25:00,487 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 522 transitions. [2022-02-11 00:25:00,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-02-11 00:25:00,488 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:25:00,488 INFO L515 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:25:00,504 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (119)] Ended with exit code 0 [2022-02-11 00:25:00,698 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable126 [2022-02-11 00:25:00,698 INFO L402 AbstractCegarLoop]: === Iteration 128 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:25:00,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:25:00,699 INFO L85 PathProgramCache]: Analyzing trace with hash -1659195445, now seen corresponding path program 119 times [2022-02-11 00:25:00,699 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:25:00,699 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1382289691] [2022-02-11 00:25:00,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:25:00,699 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:25:00,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:25:01,016 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:25:01,017 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:25:01,017 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1382289691] [2022-02-11 00:25:01,017 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1382289691] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:25:01,017 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [624481979] [2022-02-11 00:25:01,017 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-11 00:25:01,017 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:25:01,017 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:25:01,018 INFO L229 MonitoredProcess]: Starting monitored process 120 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:25:01,018 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (120)] Waiting until timeout for monitored process [2022-02-11 00:25:01,069 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-11 00:25:01,069 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:25:01,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2022-02-11 00:25:01,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:25:01,472 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 57 [2022-02-11 00:25:01,474 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 45 [2022-02-11 00:25:01,590 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:25:01,590 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:25:01,971 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-02-11 00:25:01,971 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 147 treesize of output 120 [2022-02-11 00:25:01,975 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 115 treesize of output 83 [2022-02-11 00:25:02,137 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:25:02,137 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [624481979] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:25:02,138 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:25:02,138 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 29 [2022-02-11 00:25:02,138 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746870164] [2022-02-11 00:25:02,138 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:25:02,138 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-02-11 00:25:02,138 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:25:02,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-02-11 00:25:02,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=716, Unknown=0, NotChecked=0, Total=812 [2022-02-11 00:25:02,139 INFO L87 Difference]: Start difference. First operand 201 states and 522 transitions. Second operand has 29 states, 29 states have (on average 1.4482758620689655) internal successors, (42), 29 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:25:03,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:25:03,168 INFO L93 Difference]: Finished difference Result 320 states and 729 transitions. [2022-02-11 00:25:03,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-02-11 00:25:03,169 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.4482758620689655) internal successors, (42), 29 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-02-11 00:25:03,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:25:03,170 INFO L225 Difference]: With dead ends: 320 [2022-02-11 00:25:03,170 INFO L226 Difference]: Without dead ends: 300 [2022-02-11 00:25:03,170 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 348 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=245, Invalid=1561, Unknown=0, NotChecked=0, Total=1806 [2022-02-11 00:25:03,170 INFO L934 BasicCegarLoop]: 18 mSDtfsCounter, 142 mSDsluCounter, 716 mSDsCounter, 0 mSdLazyCounter, 1132 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 393 SdHoareTripleChecker+Invalid, 1180 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 1132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-11 00:25:03,170 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [142 Valid, 393 Invalid, 1180 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 1132 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-11 00:25:03,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 300 states. [2022-02-11 00:25:03,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 300 to 212. [2022-02-11 00:25:03,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 211 states have (on average 2.6066350710900474) internal successors, (550), 211 states have internal predecessors, (550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:25:03,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 550 transitions. [2022-02-11 00:25:03,174 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 550 transitions. Word has length 18 [2022-02-11 00:25:03,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:25:03,174 INFO L470 AbstractCegarLoop]: Abstraction has 212 states and 550 transitions. [2022-02-11 00:25:03,174 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.4482758620689655) internal successors, (42), 29 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:25:03,174 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 550 transitions. [2022-02-11 00:25:03,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-02-11 00:25:03,175 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:25:03,175 INFO L515 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:25:03,198 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (120)] Ended with exit code 0 [2022-02-11 00:25:03,383 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 120 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable127 [2022-02-11 00:25:03,383 INFO L402 AbstractCegarLoop]: === Iteration 129 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:25:03,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:25:03,384 INFO L85 PathProgramCache]: Analyzing trace with hash -1625596217, now seen corresponding path program 120 times [2022-02-11 00:25:03,384 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:25:03,384 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [224378958] [2022-02-11 00:25:03,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:25:03,384 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:25:03,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:25:03,614 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:25:03,614 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:25:03,614 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [224378958] [2022-02-11 00:25:03,614 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [224378958] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:25:03,614 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2067201617] [2022-02-11 00:25:03,614 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-11 00:25:03,614 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:25:03,614 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:25:03,615 INFO L229 MonitoredProcess]: Starting monitored process 121 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:25:03,616 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (121)] Waiting until timeout for monitored process [2022-02-11 00:25:03,660 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-11 00:25:03,660 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:25:03,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2022-02-11 00:25:03,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:25:04,053 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 57 [2022-02-11 00:25:04,055 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 45 [2022-02-11 00:25:04,162 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:25:04,162 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:25:04,542 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-02-11 00:25:04,542 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 147 treesize of output 120 [2022-02-11 00:25:04,546 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 115 treesize of output 83 [2022-02-11 00:25:04,699 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:25:04,699 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2067201617] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:25:04,699 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:25:04,699 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 29 [2022-02-11 00:25:04,699 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992885265] [2022-02-11 00:25:04,699 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:25:04,699 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-02-11 00:25:04,699 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:25:04,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-02-11 00:25:04,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=717, Unknown=0, NotChecked=0, Total=812 [2022-02-11 00:25:04,700 INFO L87 Difference]: Start difference. First operand 212 states and 550 transitions. Second operand has 29 states, 29 states have (on average 1.4482758620689655) internal successors, (42), 29 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:25:06,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:25:06,617 INFO L93 Difference]: Finished difference Result 381 states and 831 transitions. [2022-02-11 00:25:06,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-02-11 00:25:06,617 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.4482758620689655) internal successors, (42), 29 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-02-11 00:25:06,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:25:06,618 INFO L225 Difference]: With dead ends: 381 [2022-02-11 00:25:06,618 INFO L226 Difference]: Without dead ends: 349 [2022-02-11 00:25:06,618 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 702 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=464, Invalid=2616, Unknown=0, NotChecked=0, Total=3080 [2022-02-11 00:25:06,618 INFO L934 BasicCegarLoop]: 19 mSDtfsCounter, 315 mSDsluCounter, 661 mSDsCounter, 0 mSdLazyCounter, 1165 mSolverCounterSat, 121 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 315 SdHoareTripleChecker+Valid, 400 SdHoareTripleChecker+Invalid, 1286 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 121 IncrementalHoareTripleChecker+Valid, 1165 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-11 00:25:06,618 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [315 Valid, 400 Invalid, 1286 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [121 Valid, 1165 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-11 00:25:06,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 349 states. [2022-02-11 00:25:06,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 349 to 211. [2022-02-11 00:25:06,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 211 states, 210 states have (on average 2.619047619047619) internal successors, (550), 210 states have internal predecessors, (550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:25:06,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 550 transitions. [2022-02-11 00:25:06,621 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 550 transitions. Word has length 18 [2022-02-11 00:25:06,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:25:06,622 INFO L470 AbstractCegarLoop]: Abstraction has 211 states and 550 transitions. [2022-02-11 00:25:06,622 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.4482758620689655) internal successors, (42), 29 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:25:06,622 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 550 transitions. [2022-02-11 00:25:06,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-02-11 00:25:06,622 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:25:06,622 INFO L515 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:25:06,638 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (121)] Ended with exit code 0 [2022-02-11 00:25:06,822 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 121 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable128 [2022-02-11 00:25:06,823 INFO L402 AbstractCegarLoop]: === Iteration 130 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:25:06,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:25:06,823 INFO L85 PathProgramCache]: Analyzing trace with hash 481187903, now seen corresponding path program 121 times [2022-02-11 00:25:06,823 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:25:06,823 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1743413719] [2022-02-11 00:25:06,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:25:06,823 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:25:06,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:25:07,201 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:25:07,202 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:25:07,202 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1743413719] [2022-02-11 00:25:07,202 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1743413719] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:25:07,202 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [973651638] [2022-02-11 00:25:07,202 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-11 00:25:07,202 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:25:07,202 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:25:07,203 INFO L229 MonitoredProcess]: Starting monitored process 122 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:25:07,204 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (122)] Waiting until timeout for monitored process [2022-02-11 00:25:07,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:25:07,248 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2022-02-11 00:25:07,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:25:07,681 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 59 [2022-02-11 00:25:07,683 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 47 [2022-02-11 00:25:07,792 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:25:07,792 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:25:08,091 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-11 00:25:08,092 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 125 treesize of output 108 [2022-02-11 00:25:08,095 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 105 treesize of output 85 [2022-02-11 00:25:08,267 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:25:08,267 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [973651638] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:25:08,267 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:25:08,267 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 29 [2022-02-11 00:25:08,267 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141043476] [2022-02-11 00:25:08,268 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:25:08,268 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-02-11 00:25:08,268 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:25:08,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-02-11 00:25:08,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=715, Unknown=0, NotChecked=0, Total=812 [2022-02-11 00:25:08,268 INFO L87 Difference]: Start difference. First operand 211 states and 550 transitions. Second operand has 29 states, 29 states have (on average 1.4482758620689655) internal successors, (42), 29 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:25:09,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:25:09,928 INFO L93 Difference]: Finished difference Result 450 states and 987 transitions. [2022-02-11 00:25:09,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-02-11 00:25:09,928 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.4482758620689655) internal successors, (42), 29 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-02-11 00:25:09,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:25:09,929 INFO L225 Difference]: With dead ends: 450 [2022-02-11 00:25:09,929 INFO L226 Difference]: Without dead ends: 407 [2022-02-11 00:25:09,930 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 608 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=410, Invalid=2452, Unknown=0, NotChecked=0, Total=2862 [2022-02-11 00:25:09,930 INFO L934 BasicCegarLoop]: 27 mSDtfsCounter, 198 mSDsluCounter, 885 mSDsCounter, 0 mSdLazyCounter, 1522 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 198 SdHoareTripleChecker+Valid, 530 SdHoareTripleChecker+Invalid, 1624 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 1522 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-11 00:25:09,930 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [198 Valid, 530 Invalid, 1624 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 1522 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-11 00:25:09,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 407 states. [2022-02-11 00:25:09,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 407 to 230. [2022-02-11 00:25:09,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 230 states, 229 states have (on average 2.663755458515284) internal successors, (610), 229 states have internal predecessors, (610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:25:09,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 610 transitions. [2022-02-11 00:25:09,936 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 610 transitions. Word has length 18 [2022-02-11 00:25:09,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:25:09,937 INFO L470 AbstractCegarLoop]: Abstraction has 230 states and 610 transitions. [2022-02-11 00:25:09,937 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.4482758620689655) internal successors, (42), 29 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:25:09,937 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 610 transitions. [2022-02-11 00:25:09,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-02-11 00:25:09,937 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:25:09,937 INFO L515 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:25:09,954 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (122)] Ended with exit code 0 [2022-02-11 00:25:10,137 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129,122 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:25:10,138 INFO L402 AbstractCegarLoop]: === Iteration 131 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:25:10,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:25:10,138 INFO L85 PathProgramCache]: Analyzing trace with hash 411685195, now seen corresponding path program 122 times [2022-02-11 00:25:10,138 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:25:10,138 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [768589170] [2022-02-11 00:25:10,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:25:10,138 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:25:10,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:25:10,334 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:25:10,334 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:25:10,334 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [768589170] [2022-02-11 00:25:10,334 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [768589170] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:25:10,334 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2098181213] [2022-02-11 00:25:10,334 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-11 00:25:10,334 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:25:10,334 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:25:10,335 INFO L229 MonitoredProcess]: Starting monitored process 123 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:25:10,336 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (123)] Waiting until timeout for monitored process [2022-02-11 00:25:10,381 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-11 00:25:10,381 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:25:10,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2022-02-11 00:25:10,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:25:10,732 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 101 treesize of output 85 [2022-02-11 00:25:10,734 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 85 treesize of output 69 [2022-02-11 00:25:10,980 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:25:10,980 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:25:11,360 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-11 00:25:11,360 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 103 treesize of output 90 [2022-02-11 00:25:11,363 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 87 treesize of output 71 [2022-02-11 00:25:11,518 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:25:11,518 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2098181213] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:25:11,518 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:25:11,518 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 28 [2022-02-11 00:25:11,518 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1957931451] [2022-02-11 00:25:11,518 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:25:11,518 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-02-11 00:25:11,518 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:25:11,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-02-11 00:25:11,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=661, Unknown=0, NotChecked=0, Total=756 [2022-02-11 00:25:11,519 INFO L87 Difference]: Start difference. First operand 230 states and 610 transitions. Second operand has 28 states, 28 states have (on average 1.4642857142857142) internal successors, (41), 28 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) [2022-02-11 00:25:13,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:25:13,142 INFO L93 Difference]: Finished difference Result 492 states and 1070 transitions. [2022-02-11 00:25:13,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-02-11 00:25:13,142 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.4642857142857142) internal successors, (41), 28 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 18 [2022-02-11 00:25:13,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:25:13,143 INFO L225 Difference]: With dead ends: 492 [2022-02-11 00:25:13,143 INFO L226 Difference]: Without dead ends: 449 [2022-02-11 00:25:13,143 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 640 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=388, Invalid=2474, Unknown=0, NotChecked=0, Total=2862 [2022-02-11 00:25:13,143 INFO L934 BasicCegarLoop]: 20 mSDtfsCounter, 234 mSDsluCounter, 842 mSDsCounter, 0 mSdLazyCounter, 1448 mSolverCounterSat, 122 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 234 SdHoareTripleChecker+Valid, 479 SdHoareTripleChecker+Invalid, 1570 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 122 IncrementalHoareTripleChecker+Valid, 1448 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-11 00:25:13,144 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [234 Valid, 479 Invalid, 1570 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [122 Valid, 1448 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-11 00:25:13,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 449 states. [2022-02-11 00:25:13,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 449 to 234. [2022-02-11 00:25:13,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234 states, 233 states have (on average 2.6695278969957084) internal successors, (622), 233 states have internal predecessors, (622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:25:13,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 622 transitions. [2022-02-11 00:25:13,147 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 622 transitions. Word has length 18 [2022-02-11 00:25:13,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:25:13,147 INFO L470 AbstractCegarLoop]: Abstraction has 234 states and 622 transitions. [2022-02-11 00:25:13,147 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.4642857142857142) internal successors, (41), 28 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) [2022-02-11 00:25:13,147 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 622 transitions. [2022-02-11 00:25:13,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-02-11 00:25:13,148 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:25:13,148 INFO L515 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:25:13,164 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (123)] Forceful destruction successful, exit code 0 [2022-02-11 00:25:13,348 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,123 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:25:13,348 INFO L402 AbstractCegarLoop]: === Iteration 132 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:25:13,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:25:13,348 INFO L85 PathProgramCache]: Analyzing trace with hash 1981331211, now seen corresponding path program 123 times [2022-02-11 00:25:13,348 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:25:13,348 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1096359690] [2022-02-11 00:25:13,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:25:13,349 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:25:13,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:25:13,583 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:25:13,583 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:25:13,583 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1096359690] [2022-02-11 00:25:13,584 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1096359690] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:25:13,584 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [525374937] [2022-02-11 00:25:13,584 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-11 00:25:13,584 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:25:13,584 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:25:13,586 INFO L229 MonitoredProcess]: Starting monitored process 124 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:25:13,586 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (124)] Waiting until timeout for monitored process [2022-02-11 00:25:13,643 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-11 00:25:13,643 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:25:13,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 43 conjunts are in the unsatisfiable core [2022-02-11 00:25:13,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:25:14,064 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 87 treesize of output 71 [2022-02-11 00:25:14,067 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 47 [2022-02-11 00:25:14,182 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:25:14,183 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:25:14,656 INFO L353 Elim1Store]: treesize reduction 15, result has 48.3 percent of original size [2022-02-11 00:25:14,656 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 158 treesize of output 135 [2022-02-11 00:25:14,660 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:25:14,664 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:25:14,664 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 122 treesize of output 94 [2022-02-11 00:25:14,912 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:25:14,912 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [525374937] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:25:14,912 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:25:14,912 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 31 [2022-02-11 00:25:14,912 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1518181528] [2022-02-11 00:25:14,912 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:25:14,913 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-02-11 00:25:14,913 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:25:14,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-02-11 00:25:14,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=830, Unknown=0, NotChecked=0, Total=930 [2022-02-11 00:25:14,913 INFO L87 Difference]: Start difference. First operand 234 states and 622 transitions. Second operand has 31 states, 31 states have (on average 1.4193548387096775) internal successors, (44), 31 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:25:16,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:25:16,008 INFO L93 Difference]: Finished difference Result 323 states and 776 transitions. [2022-02-11 00:25:16,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-02-11 00:25:16,009 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.4193548387096775) internal successors, (44), 31 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-02-11 00:25:16,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:25:16,009 INFO L225 Difference]: With dead ends: 323 [2022-02-11 00:25:16,010 INFO L226 Difference]: Without dead ends: 301 [2022-02-11 00:25:16,010 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 323 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=244, Invalid=1918, Unknown=0, NotChecked=0, Total=2162 [2022-02-11 00:25:16,010 INFO L934 BasicCegarLoop]: 15 mSDtfsCounter, 84 mSDsluCounter, 534 mSDsCounter, 0 mSdLazyCounter, 979 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 312 SdHoareTripleChecker+Invalid, 1036 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 979 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-11 00:25:16,010 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 312 Invalid, 1036 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 979 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-11 00:25:16,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 301 states. [2022-02-11 00:25:16,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 301 to 249. [2022-02-11 00:25:16,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 249 states, 248 states have (on average 2.6411290322580645) internal successors, (655), 248 states have internal predecessors, (655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:25:16,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 655 transitions. [2022-02-11 00:25:16,013 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 655 transitions. Word has length 18 [2022-02-11 00:25:16,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:25:16,013 INFO L470 AbstractCegarLoop]: Abstraction has 249 states and 655 transitions. [2022-02-11 00:25:16,013 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.4193548387096775) internal successors, (44), 31 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:25:16,013 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 655 transitions. [2022-02-11 00:25:16,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-02-11 00:25:16,014 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:25:16,014 INFO L515 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:25:16,030 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (124)] Ended with exit code 0 [2022-02-11 00:25:16,214 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131,124 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:25:16,214 INFO L402 AbstractCegarLoop]: === Iteration 133 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:25:16,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:25:16,214 INFO L85 PathProgramCache]: Analyzing trace with hash -1272060017, now seen corresponding path program 124 times [2022-02-11 00:25:16,214 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:25:16,214 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1352121960] [2022-02-11 00:25:16,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:25:16,215 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:25:16,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:25:16,477 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:25:16,477 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:25:16,477 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1352121960] [2022-02-11 00:25:16,477 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1352121960] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:25:16,477 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [713559260] [2022-02-11 00:25:16,477 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-11 00:25:16,477 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:25:16,477 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:25:16,478 INFO L229 MonitoredProcess]: Starting monitored process 125 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:25:16,479 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (125)] Waiting until timeout for monitored process [2022-02-11 00:25:16,523 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-11 00:25:16,523 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:25:16,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2022-02-11 00:25:16,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:25:17,036 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 61 [2022-02-11 00:25:17,038 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 49 [2022-02-11 00:25:17,160 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:25:17,160 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:25:17,651 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-02-11 00:25:17,651 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 144 treesize of output 117 [2022-02-11 00:25:17,655 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 112 treesize of output 80 [2022-02-11 00:25:17,808 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:25:17,809 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [713559260] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:25:17,809 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:25:17,809 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 30 [2022-02-11 00:25:17,809 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [627367338] [2022-02-11 00:25:17,809 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:25:17,810 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-11 00:25:17,810 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:25:17,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-11 00:25:17,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=778, Unknown=0, NotChecked=0, Total=870 [2022-02-11 00:25:17,810 INFO L87 Difference]: Start difference. First operand 249 states and 655 transitions. Second operand has 30 states, 30 states have (on average 1.4333333333333333) internal successors, (43), 30 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) [2022-02-11 00:25:18,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:25:18,839 INFO L93 Difference]: Finished difference Result 404 states and 920 transitions. [2022-02-11 00:25:18,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-02-11 00:25:18,839 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.4333333333333333) internal successors, (43), 30 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 18 [2022-02-11 00:25:18,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:25:18,840 INFO L225 Difference]: With dead ends: 404 [2022-02-11 00:25:18,840 INFO L226 Difference]: Without dead ends: 384 [2022-02-11 00:25:18,840 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 264 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=205, Invalid=1601, Unknown=0, NotChecked=0, Total=1806 [2022-02-11 00:25:18,840 INFO L934 BasicCegarLoop]: 20 mSDtfsCounter, 97 mSDsluCounter, 770 mSDsCounter, 0 mSdLazyCounter, 1171 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 459 SdHoareTripleChecker+Invalid, 1216 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 1171 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-11 00:25:18,841 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [97 Valid, 459 Invalid, 1216 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 1171 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-11 00:25:18,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 384 states. [2022-02-11 00:25:18,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 384 to 258. [2022-02-11 00:25:18,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 258 states, 257 states have (on average 2.6614785992217898) internal successors, (684), 257 states have internal predecessors, (684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:25:18,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 258 states to 258 states and 684 transitions. [2022-02-11 00:25:18,844 INFO L78 Accepts]: Start accepts. Automaton has 258 states and 684 transitions. Word has length 18 [2022-02-11 00:25:18,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:25:18,844 INFO L470 AbstractCegarLoop]: Abstraction has 258 states and 684 transitions. [2022-02-11 00:25:18,844 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.4333333333333333) internal successors, (43), 30 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) [2022-02-11 00:25:18,844 INFO L276 IsEmpty]: Start isEmpty. Operand 258 states and 684 transitions. [2022-02-11 00:25:18,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-02-11 00:25:18,844 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:25:18,844 INFO L515 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:25:18,861 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (125)] Ended with exit code 0 [2022-02-11 00:25:19,054 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132,125 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:25:19,054 INFO L402 AbstractCegarLoop]: === Iteration 134 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:25:19,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:25:19,054 INFO L85 PathProgramCache]: Analyzing trace with hash -1238460789, now seen corresponding path program 125 times [2022-02-11 00:25:19,054 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:25:19,054 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [707541785] [2022-02-11 00:25:19,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:25:19,054 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:25:19,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:25:19,391 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:25:19,391 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:25:19,391 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [707541785] [2022-02-11 00:25:19,391 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [707541785] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:25:19,392 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [368171229] [2022-02-11 00:25:19,392 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-11 00:25:19,392 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:25:19,392 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:25:19,393 INFO L229 MonitoredProcess]: Starting monitored process 126 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:25:19,393 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (126)] Waiting until timeout for monitored process [2022-02-11 00:25:19,440 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-11 00:25:19,440 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:25:19,441 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2022-02-11 00:25:19,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:25:19,958 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 59 [2022-02-11 00:25:19,960 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 47 [2022-02-11 00:25:20,074 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:25:20,074 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:25:20,548 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-02-11 00:25:20,548 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 147 treesize of output 120 [2022-02-11 00:25:20,551 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 115 treesize of output 83 [2022-02-11 00:25:20,711 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:25:20,711 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [368171229] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:25:20,711 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:25:20,711 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 30 [2022-02-11 00:25:20,712 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1160267100] [2022-02-11 00:25:20,712 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:25:20,712 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-11 00:25:20,712 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:25:20,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-11 00:25:20,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=777, Unknown=0, NotChecked=0, Total=870 [2022-02-11 00:25:20,712 INFO L87 Difference]: Start difference. First operand 258 states and 684 transitions. Second operand has 30 states, 30 states have (on average 1.4333333333333333) internal successors, (43), 30 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) [2022-02-11 00:25:23,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:25:23,018 INFO L93 Difference]: Finished difference Result 470 states and 1037 transitions. [2022-02-11 00:25:23,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-02-11 00:25:23,018 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.4333333333333333) internal successors, (43), 30 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 18 [2022-02-11 00:25:23,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:25:23,019 INFO L225 Difference]: With dead ends: 470 [2022-02-11 00:25:23,019 INFO L226 Difference]: Without dead ends: 438 [2022-02-11 00:25:23,019 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 463 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=319, Invalid=2333, Unknown=0, NotChecked=0, Total=2652 [2022-02-11 00:25:23,019 INFO L934 BasicCegarLoop]: 12 mSDtfsCounter, 174 mSDsluCounter, 632 mSDsCounter, 0 mSdLazyCounter, 1163 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 174 SdHoareTripleChecker+Valid, 378 SdHoareTripleChecker+Invalid, 1224 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 1163 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-11 00:25:23,019 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [174 Valid, 378 Invalid, 1224 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 1163 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-11 00:25:23,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 438 states. [2022-02-11 00:25:23,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 438 to 261. [2022-02-11 00:25:23,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 261 states, 260 states have (on average 2.669230769230769) internal successors, (694), 260 states have internal predecessors, (694), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:25:23,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 694 transitions. [2022-02-11 00:25:23,023 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 694 transitions. Word has length 18 [2022-02-11 00:25:23,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:25:23,023 INFO L470 AbstractCegarLoop]: Abstraction has 261 states and 694 transitions. [2022-02-11 00:25:23,023 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.4333333333333333) internal successors, (43), 30 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) [2022-02-11 00:25:23,023 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 694 transitions. [2022-02-11 00:25:23,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-02-11 00:25:23,023 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:25:23,023 INFO L515 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:25:23,039 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (126)] Ended with exit code 0 [2022-02-11 00:25:23,224 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable133 [2022-02-11 00:25:23,224 INFO L402 AbstractCegarLoop]: === Iteration 135 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:25:23,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:25:23,224 INFO L85 PathProgramCache]: Analyzing trace with hash 840833039, now seen corresponding path program 126 times [2022-02-11 00:25:23,224 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:25:23,224 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2081320398] [2022-02-11 00:25:23,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:25:23,224 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:25:23,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:25:23,436 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:25:23,437 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:25:23,437 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2081320398] [2022-02-11 00:25:23,437 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2081320398] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:25:23,437 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1262955641] [2022-02-11 00:25:23,437 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-11 00:25:23,437 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:25:23,437 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:25:23,438 INFO L229 MonitoredProcess]: Starting monitored process 127 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:25:23,439 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (127)] Waiting until timeout for monitored process [2022-02-11 00:25:23,483 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-11 00:25:23,484 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:25:23,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2022-02-11 00:25:23,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:25:23,907 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 104 treesize of output 88 [2022-02-11 00:25:23,909 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 88 treesize of output 72 [2022-02-11 00:25:24,181 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:25:24,181 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:25:24,803 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-02-11 00:25:24,803 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 143 treesize of output 116 [2022-02-11 00:25:24,806 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 111 treesize of output 79 [2022-02-11 00:25:24,941 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:25:24,941 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1262955641] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:25:24,941 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:25:24,941 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 30 [2022-02-11 00:25:24,941 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315741602] [2022-02-11 00:25:24,942 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:25:24,942 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-11 00:25:24,942 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:25:24,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-11 00:25:24,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=775, Unknown=0, NotChecked=0, Total=870 [2022-02-11 00:25:24,942 INFO L87 Difference]: Start difference. First operand 261 states and 694 transitions. Second operand has 30 states, 30 states have (on average 1.4333333333333333) internal successors, (43), 30 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) [2022-02-11 00:25:27,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:25:27,515 INFO L93 Difference]: Finished difference Result 524 states and 1129 transitions. [2022-02-11 00:25:27,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-02-11 00:25:27,516 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.4333333333333333) internal successors, (43), 30 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 18 [2022-02-11 00:25:27,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:25:27,517 INFO L225 Difference]: With dead ends: 524 [2022-02-11 00:25:27,517 INFO L226 Difference]: Without dead ends: 477 [2022-02-11 00:25:27,517 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 594 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=540, Invalid=2766, Unknown=0, NotChecked=0, Total=3306 [2022-02-11 00:25:27,517 INFO L934 BasicCegarLoop]: 17 mSDtfsCounter, 383 mSDsluCounter, 644 mSDsCounter, 0 mSdLazyCounter, 1056 mSolverCounterSat, 156 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 383 SdHoareTripleChecker+Valid, 402 SdHoareTripleChecker+Invalid, 1212 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 156 IncrementalHoareTripleChecker+Valid, 1056 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-11 00:25:27,517 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [383 Valid, 402 Invalid, 1212 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [156 Valid, 1056 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-11 00:25:27,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 477 states. [2022-02-11 00:25:27,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 477 to 265. [2022-02-11 00:25:27,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 265 states, 264 states have (on average 2.678030303030303) internal successors, (707), 264 states have internal predecessors, (707), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:25:27,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 707 transitions. [2022-02-11 00:25:27,521 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 707 transitions. Word has length 18 [2022-02-11 00:25:27,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:25:27,521 INFO L470 AbstractCegarLoop]: Abstraction has 265 states and 707 transitions. [2022-02-11 00:25:27,521 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.4333333333333333) internal successors, (43), 30 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) [2022-02-11 00:25:27,521 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 707 transitions. [2022-02-11 00:25:27,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-02-11 00:25:27,522 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:25:27,522 INFO L515 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:25:27,538 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (127)] Ended with exit code 0 [2022-02-11 00:25:27,722 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 127 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable134 [2022-02-11 00:25:27,722 INFO L402 AbstractCegarLoop]: === Iteration 136 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:25:27,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:25:27,722 INFO L85 PathProgramCache]: Analyzing trace with hash 1303681167, now seen corresponding path program 127 times [2022-02-11 00:25:27,723 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:25:27,723 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1150111423] [2022-02-11 00:25:27,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:25:27,723 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:25:27,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:25:28,019 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:25:28,019 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:25:28,019 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1150111423] [2022-02-11 00:25:28,019 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1150111423] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:25:28,019 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [225574915] [2022-02-11 00:25:28,019 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-11 00:25:28,020 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:25:28,020 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:25:28,020 INFO L229 MonitoredProcess]: Starting monitored process 128 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:25:28,022 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (128)] Waiting until timeout for monitored process [2022-02-11 00:25:28,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:25:28,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 39 conjunts are in the unsatisfiable core [2022-02-11 00:25:28,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:25:28,516 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 59 [2022-02-11 00:25:28,517 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 47 [2022-02-11 00:25:28,635 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:25:28,636 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:25:28,940 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-02-11 00:25:28,941 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 144 treesize of output 117 [2022-02-11 00:25:28,944 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 112 treesize of output 80 [2022-02-11 00:25:29,071 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:25:29,071 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [225574915] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:25:29,071 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:25:29,071 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 11] total 28 [2022-02-11 00:25:29,071 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1483573643] [2022-02-11 00:25:29,071 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:25:29,072 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-02-11 00:25:29,072 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:25:29,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-02-11 00:25:29,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=660, Unknown=0, NotChecked=0, Total=756 [2022-02-11 00:25:29,072 INFO L87 Difference]: Start difference. First operand 265 states and 707 transitions. Second operand has 28 states, 28 states have (on average 1.5) internal successors, (42), 28 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:25:29,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:25:29,662 INFO L93 Difference]: Finished difference Result 376 states and 882 transitions. [2022-02-11 00:25:29,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-02-11 00:25:29,662 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.5) internal successors, (42), 28 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-02-11 00:25:29,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:25:29,663 INFO L225 Difference]: With dead ends: 376 [2022-02-11 00:25:29,663 INFO L226 Difference]: Without dead ends: 350 [2022-02-11 00:25:29,663 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=158, Invalid=964, Unknown=0, NotChecked=0, Total=1122 [2022-02-11 00:25:29,663 INFO L934 BasicCegarLoop]: 19 mSDtfsCounter, 88 mSDsluCounter, 654 mSDsCounter, 0 mSdLazyCounter, 975 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 374 SdHoareTripleChecker+Invalid, 1007 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 975 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-11 00:25:29,663 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [88 Valid, 374 Invalid, 1007 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 975 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-11 00:25:29,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 350 states. [2022-02-11 00:25:29,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 350 to 266. [2022-02-11 00:25:29,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 266 states, 265 states have (on average 2.671698113207547) internal successors, (708), 265 states have internal predecessors, (708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:25:29,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266 states to 266 states and 708 transitions. [2022-02-11 00:25:29,666 INFO L78 Accepts]: Start accepts. Automaton has 266 states and 708 transitions. Word has length 18 [2022-02-11 00:25:29,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:25:29,666 INFO L470 AbstractCegarLoop]: Abstraction has 266 states and 708 transitions. [2022-02-11 00:25:29,666 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.5) internal successors, (42), 28 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:25:29,667 INFO L276 IsEmpty]: Start isEmpty. Operand 266 states and 708 transitions. [2022-02-11 00:25:29,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-02-11 00:25:29,667 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:25:29,667 INFO L515 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:25:29,683 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (128)] Ended with exit code 0 [2022-02-11 00:25:29,867 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 128 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable135 [2022-02-11 00:25:29,867 INFO L402 AbstractCegarLoop]: === Iteration 137 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:25:29,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:25:29,868 INFO L85 PathProgramCache]: Analyzing trace with hash 1337280395, now seen corresponding path program 128 times [2022-02-11 00:25:29,868 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:25:29,868 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2063017002] [2022-02-11 00:25:29,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:25:29,868 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:25:29,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:25:30,222 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:25:30,223 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:25:30,223 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2063017002] [2022-02-11 00:25:30,223 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2063017002] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:25:30,223 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1875112432] [2022-02-11 00:25:30,223 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-11 00:25:30,223 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:25:30,223 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:25:30,224 INFO L229 MonitoredProcess]: Starting monitored process 129 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:25:30,224 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (129)] Waiting until timeout for monitored process [2022-02-11 00:25:30,270 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-11 00:25:30,270 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:25:30,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2022-02-11 00:25:30,271 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:25:30,679 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 57 [2022-02-11 00:25:30,681 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 45 [2022-02-11 00:25:30,790 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:25:30,790 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:25:31,173 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-02-11 00:25:31,173 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 147 treesize of output 120 [2022-02-11 00:25:31,177 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 115 treesize of output 83 [2022-02-11 00:25:31,321 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:25:31,322 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1875112432] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:25:31,322 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:25:31,322 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 11] total 28 [2022-02-11 00:25:31,322 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [568000897] [2022-02-11 00:25:31,322 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:25:31,322 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-02-11 00:25:31,322 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:25:31,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-02-11 00:25:31,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=662, Unknown=0, NotChecked=0, Total=756 [2022-02-11 00:25:31,322 INFO L87 Difference]: Start difference. First operand 266 states and 708 transitions. Second operand has 28 states, 28 states have (on average 1.5) internal successors, (42), 28 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:25:32,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:25:32,937 INFO L93 Difference]: Finished difference Result 450 states and 1021 transitions. [2022-02-11 00:25:32,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-02-11 00:25:32,938 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.5) internal successors, (42), 28 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-02-11 00:25:32,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:25:32,938 INFO L225 Difference]: With dead ends: 450 [2022-02-11 00:25:32,939 INFO L226 Difference]: Without dead ends: 421 [2022-02-11 00:25:32,939 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 459 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=288, Invalid=1874, Unknown=0, NotChecked=0, Total=2162 [2022-02-11 00:25:32,939 INFO L934 BasicCegarLoop]: 12 mSDtfsCounter, 133 mSDsluCounter, 499 mSDsCounter, 0 mSdLazyCounter, 945 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 298 SdHoareTripleChecker+Invalid, 1007 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 945 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-11 00:25:32,939 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [133 Valid, 298 Invalid, 1007 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 945 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-11 00:25:32,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 421 states. [2022-02-11 00:25:32,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 421 to 268. [2022-02-11 00:25:32,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 268 states, 267 states have (on average 2.6666666666666665) internal successors, (712), 267 states have internal predecessors, (712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:25:32,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 712 transitions. [2022-02-11 00:25:32,942 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 712 transitions. Word has length 18 [2022-02-11 00:25:32,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:25:32,943 INFO L470 AbstractCegarLoop]: Abstraction has 268 states and 712 transitions. [2022-02-11 00:25:32,943 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.5) internal successors, (42), 28 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:25:32,943 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 712 transitions. [2022-02-11 00:25:32,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-02-11 00:25:32,943 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:25:32,943 INFO L515 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:25:32,960 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (129)] Forceful destruction successful, exit code 0 [2022-02-11 00:25:33,144 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 129 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable136 [2022-02-11 00:25:33,144 INFO L402 AbstractCegarLoop]: === Iteration 138 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:25:33,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:25:33,144 INFO L85 PathProgramCache]: Analyzing trace with hash -878393073, now seen corresponding path program 129 times [2022-02-11 00:25:33,145 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:25:33,145 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1130288098] [2022-02-11 00:25:33,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:25:33,145 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:25:33,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:25:33,353 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:25:33,353 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:25:33,353 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1130288098] [2022-02-11 00:25:33,353 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1130288098] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:25:33,353 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1050768109] [2022-02-11 00:25:33,353 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-11 00:25:33,353 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:25:33,353 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:25:33,354 INFO L229 MonitoredProcess]: Starting monitored process 130 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:25:33,355 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (130)] Waiting until timeout for monitored process [2022-02-11 00:25:33,402 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-02-11 00:25:33,403 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:25:33,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2022-02-11 00:25:33,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:25:33,729 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 101 treesize of output 85 [2022-02-11 00:25:33,731 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 85 treesize of output 69 [2022-02-11 00:25:34,049 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:25:34,050 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:25:34,448 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-02-11 00:25:34,449 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 124 treesize of output 105 [2022-02-11 00:25:34,452 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 100 treesize of output 76 [2022-02-11 00:25:34,594 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:25:34,595 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1050768109] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:25:34,595 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:25:34,595 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 11] total 28 [2022-02-11 00:25:34,595 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [232718257] [2022-02-11 00:25:34,595 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:25:34,595 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-02-11 00:25:34,595 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:25:34,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-02-11 00:25:34,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=661, Unknown=0, NotChecked=0, Total=756 [2022-02-11 00:25:34,595 INFO L87 Difference]: Start difference. First operand 268 states and 712 transitions. Second operand has 28 states, 28 states have (on average 1.5) internal successors, (42), 28 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:25:36,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:25:36,492 INFO L93 Difference]: Finished difference Result 508 states and 1115 transitions. [2022-02-11 00:25:36,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-02-11 00:25:36,492 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.5) internal successors, (42), 28 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-02-11 00:25:36,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:25:36,493 INFO L225 Difference]: With dead ends: 508 [2022-02-11 00:25:36,493 INFO L226 Difference]: Without dead ends: 458 [2022-02-11 00:25:36,494 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 502 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=325, Invalid=2027, Unknown=0, NotChecked=0, Total=2352 [2022-02-11 00:25:36,494 INFO L934 BasicCegarLoop]: 16 mSDtfsCounter, 141 mSDsluCounter, 596 mSDsCounter, 0 mSdLazyCounter, 1004 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 372 SdHoareTripleChecker+Invalid, 1071 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 1004 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-11 00:25:36,494 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [141 Valid, 372 Invalid, 1071 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 1004 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-11 00:25:36,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 458 states. [2022-02-11 00:25:36,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 458 to 274. [2022-02-11 00:25:36,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 274 states, 273 states have (on average 2.6776556776556775) internal successors, (731), 273 states have internal predecessors, (731), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:25:36,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 731 transitions. [2022-02-11 00:25:36,498 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 731 transitions. Word has length 18 [2022-02-11 00:25:36,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:25:36,498 INFO L470 AbstractCegarLoop]: Abstraction has 274 states and 731 transitions. [2022-02-11 00:25:36,498 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.5) internal successors, (42), 28 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:25:36,498 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 731 transitions. [2022-02-11 00:25:36,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-02-11 00:25:36,498 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:25:36,498 INFO L515 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:25:36,514 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (130)] Ended with exit code 0 [2022-02-11 00:25:36,699 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable137 [2022-02-11 00:25:36,699 INFO L402 AbstractCegarLoop]: === Iteration 139 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:25:36,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:25:36,699 INFO L85 PathProgramCache]: Analyzing trace with hash -1706459509, now seen corresponding path program 130 times [2022-02-11 00:25:36,699 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:25:36,699 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [658132951] [2022-02-11 00:25:36,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:25:36,699 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:25:36,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:25:36,808 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:25:36,808 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:25:36,808 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [658132951] [2022-02-11 00:25:36,808 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [658132951] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:25:36,808 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1536560617] [2022-02-11 00:25:36,808 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-11 00:25:36,808 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:25:36,808 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:25:36,809 INFO L229 MonitoredProcess]: Starting monitored process 131 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:25:36,810 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (131)] Waiting until timeout for monitored process [2022-02-11 00:25:36,854 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-11 00:25:36,854 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:25:36,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 25 conjunts are in the unsatisfiable core [2022-02-11 00:25:36,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:25:37,115 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 103 treesize of output 83 [2022-02-11 00:25:37,117 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 55 [2022-02-11 00:25:37,194 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:25:37,194 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:25:37,402 INFO L353 Elim1Store]: treesize reduction 22, result has 24.1 percent of original size [2022-02-11 00:25:37,402 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 53 treesize of output 43 [2022-02-11 00:25:37,419 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:25:37,419 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1536560617] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:25:37,419 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:25:37,419 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 21 [2022-02-11 00:25:37,419 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1852254256] [2022-02-11 00:25:37,419 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:25:37,420 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-11 00:25:37,420 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:25:37,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-11 00:25:37,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=345, Unknown=0, NotChecked=0, Total=420 [2022-02-11 00:25:37,420 INFO L87 Difference]: Start difference. First operand 274 states and 731 transitions. Second operand has 21 states, 21 states have (on average 1.6666666666666667) internal successors, (35), 21 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:25:38,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:25:38,315 INFO L93 Difference]: Finished difference Result 403 states and 970 transitions. [2022-02-11 00:25:38,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-02-11 00:25:38,316 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.6666666666666667) internal successors, (35), 21 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-02-11 00:25:38,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:25:38,316 INFO L225 Difference]: With dead ends: 403 [2022-02-11 00:25:38,316 INFO L226 Difference]: Without dead ends: 403 [2022-02-11 00:25:38,317 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 334 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=327, Invalid=1313, Unknown=0, NotChecked=0, Total=1640 [2022-02-11 00:25:38,317 INFO L934 BasicCegarLoop]: 22 mSDtfsCounter, 101 mSDsluCounter, 307 mSDsCounter, 0 mSdLazyCounter, 478 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 218 SdHoareTripleChecker+Invalid, 522 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 478 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-11 00:25:38,317 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [101 Valid, 218 Invalid, 522 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 478 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-11 00:25:38,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 403 states. [2022-02-11 00:25:38,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 403 to 285. [2022-02-11 00:25:38,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 285 states, 284 states have (on average 2.665492957746479) internal successors, (757), 284 states have internal predecessors, (757), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:25:38,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285 states to 285 states and 757 transitions. [2022-02-11 00:25:38,320 INFO L78 Accepts]: Start accepts. Automaton has 285 states and 757 transitions. Word has length 18 [2022-02-11 00:25:38,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:25:38,320 INFO L470 AbstractCegarLoop]: Abstraction has 285 states and 757 transitions. [2022-02-11 00:25:38,320 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.6666666666666667) internal successors, (35), 21 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:25:38,321 INFO L276 IsEmpty]: Start isEmpty. Operand 285 states and 757 transitions. [2022-02-11 00:25:38,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-02-11 00:25:38,321 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:25:38,321 INFO L515 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:25:38,337 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (131)] Forceful destruction successful, exit code 0 [2022-02-11 00:25:38,521 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138,131 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:25:38,521 INFO L402 AbstractCegarLoop]: === Iteration 140 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:25:38,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:25:38,522 INFO L85 PathProgramCache]: Analyzing trace with hash -904944693, now seen corresponding path program 131 times [2022-02-11 00:25:38,522 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:25:38,522 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1563520608] [2022-02-11 00:25:38,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:25:38,522 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:25:38,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:25:38,706 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:25:38,706 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:25:38,706 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1563520608] [2022-02-11 00:25:38,706 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1563520608] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:25:38,706 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1803021573] [2022-02-11 00:25:38,706 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-11 00:25:38,707 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:25:38,707 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:25:38,708 INFO L229 MonitoredProcess]: Starting monitored process 132 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:25:38,708 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (132)] Waiting until timeout for monitored process [2022-02-11 00:25:38,756 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-02-11 00:25:38,756 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:25:38,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2022-02-11 00:25:38,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:25:39,081 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 101 treesize of output 85 [2022-02-11 00:25:39,084 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 85 treesize of output 69 [2022-02-11 00:25:39,373 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:25:39,373 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:25:39,799 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-11 00:25:39,800 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 116 treesize of output 99 [2022-02-11 00:25:39,803 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 96 treesize of output 76 [2022-02-11 00:25:39,925 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:25:39,926 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1803021573] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:25:39,926 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:25:39,926 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 10] total 26 [2022-02-11 00:25:39,926 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044181658] [2022-02-11 00:25:39,926 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:25:39,926 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-11 00:25:39,926 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:25:39,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-11 00:25:39,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=561, Unknown=0, NotChecked=0, Total=650 [2022-02-11 00:25:39,926 INFO L87 Difference]: Start difference. First operand 285 states and 757 transitions. Second operand has 26 states, 26 states have (on average 1.5) internal successors, (39), 26 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) [2022-02-11 00:25:40,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:25:40,951 INFO L93 Difference]: Finished difference Result 457 states and 1044 transitions. [2022-02-11 00:25:40,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-02-11 00:25:40,951 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.5) internal successors, (39), 26 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 18 [2022-02-11 00:25:40,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:25:40,952 INFO L225 Difference]: With dead ends: 457 [2022-02-11 00:25:40,952 INFO L226 Difference]: Without dead ends: 406 [2022-02-11 00:25:40,952 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 267 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=239, Invalid=1243, Unknown=0, NotChecked=0, Total=1482 [2022-02-11 00:25:40,953 INFO L934 BasicCegarLoop]: 14 mSDtfsCounter, 131 mSDsluCounter, 513 mSDsCounter, 0 mSdLazyCounter, 897 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 294 SdHoareTripleChecker+Invalid, 962 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 897 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-11 00:25:40,953 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [131 Valid, 294 Invalid, 962 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 897 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-11 00:25:40,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 406 states. [2022-02-11 00:25:40,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 406 to 290. [2022-02-11 00:25:40,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 290 states, 289 states have (on average 2.660899653979239) internal successors, (769), 289 states have internal predecessors, (769), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:25:40,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 769 transitions. [2022-02-11 00:25:40,956 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 769 transitions. Word has length 18 [2022-02-11 00:25:40,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:25:40,956 INFO L470 AbstractCegarLoop]: Abstraction has 290 states and 769 transitions. [2022-02-11 00:25:40,957 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.5) internal successors, (39), 26 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) [2022-02-11 00:25:40,957 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 769 transitions. [2022-02-11 00:25:40,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-02-11 00:25:40,957 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:25:40,957 INFO L515 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:25:40,973 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (132)] Forceful destruction successful, exit code 0 [2022-02-11 00:25:41,157 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable139,132 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:25:41,158 INFO L402 AbstractCegarLoop]: === Iteration 141 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:25:41,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:25:41,158 INFO L85 PathProgramCache]: Analyzing trace with hash 34895499, now seen corresponding path program 132 times [2022-02-11 00:25:41,158 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:25:41,158 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [315700410] [2022-02-11 00:25:41,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:25:41,158 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:25:41,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:25:41,404 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:25:41,404 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:25:41,404 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [315700410] [2022-02-11 00:25:41,404 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [315700410] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:25:41,404 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2095182990] [2022-02-11 00:25:41,405 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-11 00:25:41,405 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:25:41,405 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:25:41,406 INFO L229 MonitoredProcess]: Starting monitored process 133 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:25:41,406 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (133)] Waiting until timeout for monitored process [2022-02-11 00:25:41,452 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-11 00:25:41,452 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:25:41,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2022-02-11 00:25:41,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:25:41,900 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 57 [2022-02-11 00:25:41,902 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 45 [2022-02-11 00:25:42,011 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:25:42,011 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:25:42,332 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-11 00:25:42,332 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 123 treesize of output 106 [2022-02-11 00:25:42,335 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 103 treesize of output 83 [2022-02-11 00:25:42,486 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:25:42,486 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2095182990] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:25:42,486 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:25:42,486 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 11] total 27 [2022-02-11 00:25:42,486 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219527624] [2022-02-11 00:25:42,486 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:25:42,486 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-11 00:25:42,486 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:25:42,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-11 00:25:42,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=609, Unknown=0, NotChecked=0, Total=702 [2022-02-11 00:25:42,487 INFO L87 Difference]: Start difference. First operand 290 states and 769 transitions. Second operand has 27 states, 27 states have (on average 1.5185185185185186) internal successors, (41), 27 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) [2022-02-11 00:25:43,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:25:43,967 INFO L93 Difference]: Finished difference Result 484 states and 1116 transitions. [2022-02-11 00:25:43,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-02-11 00:25:43,967 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.5185185185185186) internal successors, (41), 27 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 18 [2022-02-11 00:25:43,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:25:43,968 INFO L225 Difference]: With dead ends: 484 [2022-02-11 00:25:43,968 INFO L226 Difference]: Without dead ends: 444 [2022-02-11 00:25:43,968 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 628 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=416, Invalid=2340, Unknown=0, NotChecked=0, Total=2756 [2022-02-11 00:25:43,968 INFO L934 BasicCegarLoop]: 17 mSDtfsCounter, 246 mSDsluCounter, 495 mSDsCounter, 0 mSdLazyCounter, 922 mSolverCounterSat, 120 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 246 SdHoareTripleChecker+Valid, 289 SdHoareTripleChecker+Invalid, 1042 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 120 IncrementalHoareTripleChecker+Valid, 922 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-11 00:25:43,968 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [246 Valid, 289 Invalid, 1042 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [120 Valid, 922 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-11 00:25:43,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 444 states. [2022-02-11 00:25:43,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 444 to 296. [2022-02-11 00:25:43,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 296 states, 295 states have (on average 2.7084745762711866) internal successors, (799), 295 states have internal predecessors, (799), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:25:43,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 799 transitions. [2022-02-11 00:25:43,972 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 799 transitions. Word has length 18 [2022-02-11 00:25:43,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:25:43,972 INFO L470 AbstractCegarLoop]: Abstraction has 296 states and 799 transitions. [2022-02-11 00:25:43,972 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.5185185185185186) internal successors, (41), 27 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) [2022-02-11 00:25:43,972 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 799 transitions. [2022-02-11 00:25:43,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-02-11 00:25:43,973 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:25:43,973 INFO L515 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:25:44,001 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (133)] Forceful destruction successful, exit code 0 [2022-02-11 00:25:44,189 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140,133 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:25:44,189 INFO L402 AbstractCegarLoop]: === Iteration 142 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:25:44,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:25:44,189 INFO L85 PathProgramCache]: Analyzing trace with hash 2114189327, now seen corresponding path program 133 times [2022-02-11 00:25:44,190 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:25:44,190 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [656773964] [2022-02-11 00:25:44,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:25:44,190 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:25:44,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:25:44,385 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:25:44,385 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:25:44,386 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [656773964] [2022-02-11 00:25:44,386 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [656773964] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:25:44,386 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1812436404] [2022-02-11 00:25:44,386 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-11 00:25:44,386 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:25:44,386 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:25:44,387 INFO L229 MonitoredProcess]: Starting monitored process 134 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:25:44,387 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (134)] Waiting until timeout for monitored process [2022-02-11 00:25:44,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:25:44,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 39 conjunts are in the unsatisfiable core [2022-02-11 00:25:44,435 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:25:44,731 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 99 treesize of output 83 [2022-02-11 00:25:44,733 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 83 treesize of output 67 [2022-02-11 00:25:44,959 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:25:44,960 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:25:45,235 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-11 00:25:45,235 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 123 treesize of output 106 [2022-02-11 00:25:45,238 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 103 treesize of output 83 [2022-02-11 00:25:45,384 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:25:45,385 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1812436404] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:25:45,385 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:25:45,385 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 11] total 27 [2022-02-11 00:25:45,385 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280121067] [2022-02-11 00:25:45,385 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:25:45,385 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-11 00:25:45,385 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:25:45,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-11 00:25:45,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=615, Unknown=0, NotChecked=0, Total=702 [2022-02-11 00:25:45,385 INFO L87 Difference]: Start difference. First operand 296 states and 799 transitions. Second operand has 27 states, 27 states have (on average 1.5185185185185186) internal successors, (41), 27 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) [2022-02-11 00:25:47,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:25:47,498 INFO L93 Difference]: Finished difference Result 524 states and 1159 transitions. [2022-02-11 00:25:47,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-02-11 00:25:47,498 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.5185185185185186) internal successors, (41), 27 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 18 [2022-02-11 00:25:47,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:25:47,499 INFO L225 Difference]: With dead ends: 524 [2022-02-11 00:25:47,499 INFO L226 Difference]: Without dead ends: 477 [2022-02-11 00:25:47,499 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 736 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=493, Invalid=2813, Unknown=0, NotChecked=0, Total=3306 [2022-02-11 00:25:47,500 INFO L934 BasicCegarLoop]: 15 mSDtfsCounter, 223 mSDsluCounter, 658 mSDsCounter, 0 mSdLazyCounter, 1217 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 223 SdHoareTripleChecker+Valid, 389 SdHoareTripleChecker+Invalid, 1316 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 1217 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-11 00:25:47,500 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [223 Valid, 389 Invalid, 1316 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 1217 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-11 00:25:47,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 477 states. [2022-02-11 00:25:47,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 477 to 296. [2022-02-11 00:25:47,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 296 states, 295 states have (on average 2.701694915254237) internal successors, (797), 295 states have internal predecessors, (797), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:25:47,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 797 transitions. [2022-02-11 00:25:47,504 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 797 transitions. Word has length 18 [2022-02-11 00:25:47,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:25:47,504 INFO L470 AbstractCegarLoop]: Abstraction has 296 states and 797 transitions. [2022-02-11 00:25:47,504 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.5185185185185186) internal successors, (41), 27 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) [2022-02-11 00:25:47,504 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 797 transitions. [2022-02-11 00:25:47,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-02-11 00:25:47,504 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:25:47,504 INFO L515 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:25:47,521 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (134)] Ended with exit code 0 [2022-02-11 00:25:47,705 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141,134 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:25:47,705 INFO L402 AbstractCegarLoop]: === Iteration 143 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:25:47,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:25:47,705 INFO L85 PathProgramCache]: Analyzing trace with hash -34607209, now seen corresponding path program 134 times [2022-02-11 00:25:47,705 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:25:47,705 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [524686237] [2022-02-11 00:25:47,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:25:47,705 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:25:47,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:25:47,884 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:25:47,884 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:25:47,884 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [524686237] [2022-02-11 00:25:47,884 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [524686237] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:25:47,884 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [714678282] [2022-02-11 00:25:47,884 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-11 00:25:47,884 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:25:47,884 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:25:47,885 INFO L229 MonitoredProcess]: Starting monitored process 135 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:25:47,886 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (135)] Waiting until timeout for monitored process [2022-02-11 00:25:47,933 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-11 00:25:47,933 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:25:47,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2022-02-11 00:25:47,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:25:48,262 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 101 treesize of output 85 [2022-02-11 00:25:48,264 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 85 treesize of output 69 [2022-02-11 00:25:48,506 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:25:48,506 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:25:48,860 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-11 00:25:48,860 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 103 treesize of output 90 [2022-02-11 00:25:48,864 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 87 treesize of output 71 [2022-02-11 00:25:49,014 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:25:49,014 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [714678282] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:25:49,014 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:25:49,014 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 11] total 27 [2022-02-11 00:25:49,015 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [856510288] [2022-02-11 00:25:49,015 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:25:49,015 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-11 00:25:49,015 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:25:49,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-11 00:25:49,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=611, Unknown=0, NotChecked=0, Total=702 [2022-02-11 00:25:49,015 INFO L87 Difference]: Start difference. First operand 296 states and 797 transitions. Second operand has 27 states, 27 states have (on average 1.5185185185185186) internal successors, (41), 27 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) [2022-02-11 00:25:51,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:25:51,291 INFO L93 Difference]: Finished difference Result 532 states and 1178 transitions. [2022-02-11 00:25:51,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-02-11 00:25:51,291 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.5185185185185186) internal successors, (41), 27 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 18 [2022-02-11 00:25:51,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:25:51,292 INFO L225 Difference]: With dead ends: 532 [2022-02-11 00:25:51,292 INFO L226 Difference]: Without dead ends: 475 [2022-02-11 00:25:51,292 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 980 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=662, Invalid=3370, Unknown=0, NotChecked=0, Total=4032 [2022-02-11 00:25:51,293 INFO L934 BasicCegarLoop]: 14 mSDtfsCounter, 270 mSDsluCounter, 692 mSDsCounter, 0 mSdLazyCounter, 1144 mSolverCounterSat, 130 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 270 SdHoareTripleChecker+Valid, 418 SdHoareTripleChecker+Invalid, 1274 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 130 IncrementalHoareTripleChecker+Valid, 1144 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-11 00:25:51,293 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [270 Valid, 418 Invalid, 1274 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [130 Valid, 1144 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-11 00:25:51,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 475 states. [2022-02-11 00:25:51,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 475 to 299. [2022-02-11 00:25:51,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 299 states, 298 states have (on average 2.7013422818791946) internal successors, (805), 298 states have internal predecessors, (805), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:25:51,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 805 transitions. [2022-02-11 00:25:51,297 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 805 transitions. Word has length 18 [2022-02-11 00:25:51,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:25:51,297 INFO L470 AbstractCegarLoop]: Abstraction has 299 states and 805 transitions. [2022-02-11 00:25:51,297 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.5185185185185186) internal successors, (41), 27 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) [2022-02-11 00:25:51,297 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 805 transitions. [2022-02-11 00:25:51,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-02-11 00:25:51,297 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:25:51,297 INFO L515 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:25:51,314 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (135)] Forceful destruction successful, exit code 0 [2022-02-11 00:25:51,511 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142,135 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:25:51,511 INFO L402 AbstractCegarLoop]: === Iteration 144 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:25:51,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:25:51,511 INFO L85 PathProgramCache]: Analyzing trace with hash 2072176911, now seen corresponding path program 135 times [2022-02-11 00:25:51,511 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:25:51,511 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [628523677] [2022-02-11 00:25:51,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:25:51,511 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:25:51,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:25:51,694 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:25:51,694 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:25:51,694 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [628523677] [2022-02-11 00:25:51,694 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [628523677] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:25:51,694 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [430544192] [2022-02-11 00:25:51,694 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-11 00:25:51,694 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:25:51,694 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:25:51,695 INFO L229 MonitoredProcess]: Starting monitored process 136 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:25:51,696 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (136)] Waiting until timeout for monitored process [2022-02-11 00:25:51,743 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-11 00:25:51,743 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:25:51,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 42 conjunts are in the unsatisfiable core [2022-02-11 00:25:51,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:25:52,158 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 115 treesize of output 95 [2022-02-11 00:25:52,160 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 83 treesize of output 67 [2022-02-11 00:25:52,377 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:25:52,378 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:25:52,728 INFO L353 Elim1Store]: treesize reduction 15, result has 48.3 percent of original size [2022-02-11 00:25:52,728 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 130 treesize of output 115 [2022-02-11 00:25:52,733 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:25:52,737 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:25:52,737 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 102 treesize of output 82 [2022-02-11 00:25:52,975 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:25:52,976 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [430544192] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:25:52,976 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:25:52,976 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 30 [2022-02-11 00:25:52,976 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1675882754] [2022-02-11 00:25:52,976 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:25:52,976 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-11 00:25:52,976 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:25:52,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-11 00:25:52,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=762, Unknown=0, NotChecked=0, Total=870 [2022-02-11 00:25:52,977 INFO L87 Difference]: Start difference. First operand 299 states and 805 transitions. Second operand has 30 states, 30 states have (on average 1.4333333333333333) internal successors, (43), 30 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) [2022-02-11 00:25:57,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:25:57,033 INFO L93 Difference]: Finished difference Result 697 states and 1524 transitions. [2022-02-11 00:25:57,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-02-11 00:25:57,033 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.4333333333333333) internal successors, (43), 30 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 18 [2022-02-11 00:25:57,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:25:57,034 INFO L225 Difference]: With dead ends: 697 [2022-02-11 00:25:57,034 INFO L226 Difference]: Without dead ends: 627 [2022-02-11 00:25:57,035 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1910 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=943, Invalid=6029, Unknown=0, NotChecked=0, Total=6972 [2022-02-11 00:25:57,035 INFO L934 BasicCegarLoop]: 24 mSDtfsCounter, 180 mSDsluCounter, 874 mSDsCounter, 0 mSdLazyCounter, 1582 mSolverCounterSat, 141 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 180 SdHoareTripleChecker+Valid, 534 SdHoareTripleChecker+Invalid, 1723 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 141 IncrementalHoareTripleChecker+Valid, 1582 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-11 00:25:57,035 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [180 Valid, 534 Invalid, 1723 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [141 Valid, 1582 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-11 00:25:57,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 627 states. [2022-02-11 00:25:57,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 627 to 317. [2022-02-11 00:25:57,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 317 states, 316 states have (on average 2.7436708860759493) internal successors, (867), 316 states have internal predecessors, (867), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:25:57,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 317 states to 317 states and 867 transitions. [2022-02-11 00:25:57,042 INFO L78 Accepts]: Start accepts. Automaton has 317 states and 867 transitions. Word has length 18 [2022-02-11 00:25:57,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:25:57,042 INFO L470 AbstractCegarLoop]: Abstraction has 317 states and 867 transitions. [2022-02-11 00:25:57,042 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.4333333333333333) internal successors, (43), 30 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) [2022-02-11 00:25:57,042 INFO L276 IsEmpty]: Start isEmpty. Operand 317 states and 867 transitions. [2022-02-11 00:25:57,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-02-11 00:25:57,042 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:25:57,042 INFO L515 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:25:57,058 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (136)] Ended with exit code 0 [2022-02-11 00:25:57,252 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143,136 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:25:57,252 INFO L402 AbstractCegarLoop]: === Iteration 145 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:25:57,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:25:57,252 INFO L85 PathProgramCache]: Analyzing trace with hash -1507396801, now seen corresponding path program 136 times [2022-02-11 00:25:57,252 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:25:57,252 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1785445596] [2022-02-11 00:25:57,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:25:57,252 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:25:57,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:25:57,519 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:25:57,519 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:25:57,519 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1785445596] [2022-02-11 00:25:57,519 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1785445596] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:25:57,519 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1254331306] [2022-02-11 00:25:57,519 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-11 00:25:57,519 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:25:57,519 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:25:57,520 INFO L229 MonitoredProcess]: Starting monitored process 137 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:25:57,521 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (137)] Waiting until timeout for monitored process [2022-02-11 00:25:57,566 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-11 00:25:57,566 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:25:57,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2022-02-11 00:25:57,567 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:25:57,995 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 61 [2022-02-11 00:25:57,997 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 49 [2022-02-11 00:25:58,108 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:25:58,109 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:25:58,526 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-02-11 00:25:58,526 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 147 treesize of output 120 [2022-02-11 00:25:58,532 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 115 treesize of output 83 [2022-02-11 00:25:58,690 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:25:58,690 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1254331306] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:25:58,690 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:25:58,690 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 30 [2022-02-11 00:25:58,690 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779120881] [2022-02-11 00:25:58,690 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:25:58,690 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-11 00:25:58,690 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:25:58,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-11 00:25:58,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=777, Unknown=0, NotChecked=0, Total=870 [2022-02-11 00:25:58,691 INFO L87 Difference]: Start difference. First operand 317 states and 867 transitions. Second operand has 30 states, 30 states have (on average 1.4333333333333333) internal successors, (43), 30 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) [2022-02-11 00:25:59,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:25:59,642 INFO L93 Difference]: Finished difference Result 479 states and 1161 transitions. [2022-02-11 00:25:59,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-02-11 00:25:59,642 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.4333333333333333) internal successors, (43), 30 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 18 [2022-02-11 00:25:59,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:25:59,643 INFO L225 Difference]: With dead ends: 479 [2022-02-11 00:25:59,643 INFO L226 Difference]: Without dead ends: 457 [2022-02-11 00:25:59,644 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 265 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=211, Invalid=1595, Unknown=0, NotChecked=0, Total=1806 [2022-02-11 00:25:59,644 INFO L934 BasicCegarLoop]: 21 mSDtfsCounter, 100 mSDsluCounter, 719 mSDsCounter, 0 mSdLazyCounter, 1042 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 441 SdHoareTripleChecker+Invalid, 1090 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 1042 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-11 00:25:59,644 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [100 Valid, 441 Invalid, 1090 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 1042 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-11 00:25:59,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 457 states. [2022-02-11 00:25:59,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 457 to 341. [2022-02-11 00:25:59,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 341 states, 340 states have (on average 2.7529411764705882) internal successors, (936), 340 states have internal predecessors, (936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:25:59,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 936 transitions. [2022-02-11 00:25:59,648 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 936 transitions. Word has length 18 [2022-02-11 00:25:59,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:25:59,648 INFO L470 AbstractCegarLoop]: Abstraction has 341 states and 936 transitions. [2022-02-11 00:25:59,648 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.4333333333333333) internal successors, (43), 30 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) [2022-02-11 00:25:59,648 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 936 transitions. [2022-02-11 00:25:59,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-02-11 00:25:59,649 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:25:59,649 INFO L515 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:25:59,665 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (137)] Ended with exit code 0 [2022-02-11 00:25:59,849 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 137 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable144 [2022-02-11 00:25:59,849 INFO L402 AbstractCegarLoop]: === Iteration 146 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:25:59,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:25:59,850 INFO L85 PathProgramCache]: Analyzing trace with hash -465820733, now seen corresponding path program 137 times [2022-02-11 00:25:59,850 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:25:59,850 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1934480112] [2022-02-11 00:25:59,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:25:59,850 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:25:59,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:26:00,080 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:26:00,080 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:26:00,080 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1934480112] [2022-02-11 00:26:00,080 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1934480112] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:26:00,080 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [340618237] [2022-02-11 00:26:00,080 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-11 00:26:00,080 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:26:00,080 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:26:00,081 INFO L229 MonitoredProcess]: Starting monitored process 138 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:26:00,082 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (138)] Waiting until timeout for monitored process [2022-02-11 00:26:00,129 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-11 00:26:00,129 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:26:00,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2022-02-11 00:26:00,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:26:00,535 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 57 [2022-02-11 00:26:00,537 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 45 [2022-02-11 00:26:00,649 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:26:00,649 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:26:01,106 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-02-11 00:26:01,107 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 145 treesize of output 118 [2022-02-11 00:26:01,111 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 113 treesize of output 81 [2022-02-11 00:26:01,262 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:26:01,262 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [340618237] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:26:01,262 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:26:01,262 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 30 [2022-02-11 00:26:01,262 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1564427911] [2022-02-11 00:26:01,262 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:26:01,262 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-11 00:26:01,262 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:26:01,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-11 00:26:01,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=778, Unknown=0, NotChecked=0, Total=870 [2022-02-11 00:26:01,263 INFO L87 Difference]: Start difference. First operand 341 states and 936 transitions. Second operand has 30 states, 30 states have (on average 1.4333333333333333) internal successors, (43), 30 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) [2022-02-11 00:26:02,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:26:02,435 INFO L93 Difference]: Finished difference Result 524 states and 1233 transitions. [2022-02-11 00:26:02,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-02-11 00:26:02,435 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.4333333333333333) internal successors, (43), 30 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 18 [2022-02-11 00:26:02,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:26:02,452 INFO L225 Difference]: With dead ends: 524 [2022-02-11 00:26:02,452 INFO L226 Difference]: Without dead ends: 497 [2022-02-11 00:26:02,452 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 295 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=221, Invalid=1759, Unknown=0, NotChecked=0, Total=1980 [2022-02-11 00:26:02,453 INFO L934 BasicCegarLoop]: 20 mSDtfsCounter, 113 mSDsluCounter, 884 mSDsCounter, 0 mSdLazyCounter, 1363 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 538 SdHoareTripleChecker+Invalid, 1413 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 1363 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-11 00:26:02,453 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [113 Valid, 538 Invalid, 1413 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 1363 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-11 00:26:02,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 497 states. [2022-02-11 00:26:02,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 497 to 344. [2022-02-11 00:26:02,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 344 states, 343 states have (on average 2.7551020408163267) internal successors, (945), 343 states have internal predecessors, (945), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:26:02,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 344 states to 344 states and 945 transitions. [2022-02-11 00:26:02,457 INFO L78 Accepts]: Start accepts. Automaton has 344 states and 945 transitions. Word has length 18 [2022-02-11 00:26:02,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:26:02,458 INFO L470 AbstractCegarLoop]: Abstraction has 344 states and 945 transitions. [2022-02-11 00:26:02,458 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.4333333333333333) internal successors, (43), 30 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) [2022-02-11 00:26:02,458 INFO L276 IsEmpty]: Start isEmpty. Operand 344 states and 945 transitions. [2022-02-11 00:26:02,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-02-11 00:26:02,458 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:26:02,458 INFO L515 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:26:02,475 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (138)] Forceful destruction successful, exit code 0 [2022-02-11 00:26:02,675 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable145 [2022-02-11 00:26:02,675 INFO L402 AbstractCegarLoop]: === Iteration 147 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:26:02,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:26:02,675 INFO L85 PathProgramCache]: Analyzing trace with hash -432221505, now seen corresponding path program 138 times [2022-02-11 00:26:02,675 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:26:02,675 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [388297016] [2022-02-11 00:26:02,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:26:02,675 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:26:02,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:26:02,988 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:26:02,989 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:26:02,989 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [388297016] [2022-02-11 00:26:02,989 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [388297016] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:26:02,989 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [278913046] [2022-02-11 00:26:02,989 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-11 00:26:02,989 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:26:02,989 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:26:03,004 INFO L229 MonitoredProcess]: Starting monitored process 139 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:26:03,018 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (139)] Waiting until timeout for monitored process [2022-02-11 00:26:03,057 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-11 00:26:03,057 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:26:03,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2022-02-11 00:26:03,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:26:03,498 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 57 [2022-02-11 00:26:03,500 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 45 [2022-02-11 00:26:03,617 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:26:03,617 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:26:04,073 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-02-11 00:26:04,077 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 147 treesize of output 120 [2022-02-11 00:26:04,081 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 115 treesize of output 83 [2022-02-11 00:26:04,218 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:26:04,218 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [278913046] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:26:04,218 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:26:04,218 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 30 [2022-02-11 00:26:04,218 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1502137477] [2022-02-11 00:26:04,218 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:26:04,218 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-11 00:26:04,218 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:26:04,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-11 00:26:04,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=778, Unknown=0, NotChecked=0, Total=870 [2022-02-11 00:26:04,219 INFO L87 Difference]: Start difference. First operand 344 states and 945 transitions. Second operand has 30 states, 30 states have (on average 1.4333333333333333) internal successors, (43), 30 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) [2022-02-11 00:26:06,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:26:06,734 INFO L93 Difference]: Finished difference Result 586 states and 1334 transitions. [2022-02-11 00:26:06,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-02-11 00:26:06,735 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.4333333333333333) internal successors, (43), 30 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 18 [2022-02-11 00:26:06,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:26:06,736 INFO L225 Difference]: With dead ends: 586 [2022-02-11 00:26:06,736 INFO L226 Difference]: Without dead ends: 536 [2022-02-11 00:26:06,736 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 474 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=465, Invalid=2505, Unknown=0, NotChecked=0, Total=2970 [2022-02-11 00:26:06,736 INFO L934 BasicCegarLoop]: 13 mSDtfsCounter, 240 mSDsluCounter, 585 mSDsCounter, 0 mSdLazyCounter, 1031 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 240 SdHoareTripleChecker+Valid, 358 SdHoareTripleChecker+Invalid, 1133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 1031 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-11 00:26:06,736 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [240 Valid, 358 Invalid, 1133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 1031 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-11 00:26:06,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 536 states. [2022-02-11 00:26:06,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 536 to 344. [2022-02-11 00:26:06,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 344 states, 343 states have (on average 2.749271137026239) internal successors, (943), 343 states have internal predecessors, (943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:26:06,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 344 states to 344 states and 943 transitions. [2022-02-11 00:26:06,741 INFO L78 Accepts]: Start accepts. Automaton has 344 states and 943 transitions. Word has length 18 [2022-02-11 00:26:06,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:26:06,741 INFO L470 AbstractCegarLoop]: Abstraction has 344 states and 943 transitions. [2022-02-11 00:26:06,741 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.4333333333333333) internal successors, (43), 30 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) [2022-02-11 00:26:06,741 INFO L276 IsEmpty]: Start isEmpty. Operand 344 states and 943 transitions. [2022-02-11 00:26:06,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-02-11 00:26:06,741 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:26:06,741 INFO L515 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:26:06,758 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (139)] Ended with exit code 0 [2022-02-11 00:26:06,942 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 139 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable146 [2022-02-11 00:26:06,942 INFO L402 AbstractCegarLoop]: === Iteration 148 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:26:06,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:26:06,942 INFO L85 PathProgramCache]: Analyzing trace with hash -1762096693, now seen corresponding path program 139 times [2022-02-11 00:26:06,942 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:26:06,942 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2107856937] [2022-02-11 00:26:06,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:26:06,942 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:26:06,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:26:07,164 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:26:07,164 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:26:07,165 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2107856937] [2022-02-11 00:26:07,165 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2107856937] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:26:07,165 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [261546761] [2022-02-11 00:26:07,165 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-11 00:26:07,165 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:26:07,165 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:26:07,166 INFO L229 MonitoredProcess]: Starting monitored process 140 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:26:07,166 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (140)] Waiting until timeout for monitored process [2022-02-11 00:26:07,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:26:07,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2022-02-11 00:26:07,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:26:07,605 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 115 treesize of output 95 [2022-02-11 00:26:07,608 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 83 treesize of output 67 [2022-02-11 00:26:07,868 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:26:07,868 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:26:08,665 INFO L353 Elim1Store]: treesize reduction 17, result has 48.5 percent of original size [2022-02-11 00:26:08,665 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 163 treesize of output 126 [2022-02-11 00:26:08,668 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:26:08,668 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:26:08,672 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:26:08,672 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 111 treesize of output 69 [2022-02-11 00:26:08,760 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:26:08,760 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [261546761] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:26:08,761 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:26:08,761 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 29 [2022-02-11 00:26:08,761 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1752267915] [2022-02-11 00:26:08,761 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:26:08,761 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-02-11 00:26:08,761 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:26:08,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-02-11 00:26:08,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=719, Unknown=0, NotChecked=0, Total=812 [2022-02-11 00:26:08,761 INFO L87 Difference]: Start difference. First operand 344 states and 943 transitions. Second operand has 29 states, 29 states have (on average 1.4482758620689655) internal successors, (42), 29 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:26:11,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:26:11,423 INFO L93 Difference]: Finished difference Result 596 states and 1393 transitions. [2022-02-11 00:26:11,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-02-11 00:26:11,424 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.4482758620689655) internal successors, (42), 29 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-02-11 00:26:11,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:26:11,424 INFO L225 Difference]: With dead ends: 596 [2022-02-11 00:26:11,424 INFO L226 Difference]: Without dead ends: 555 [2022-02-11 00:26:11,425 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 787 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=419, Invalid=2887, Unknown=0, NotChecked=0, Total=3306 [2022-02-11 00:26:11,425 INFO L934 BasicCegarLoop]: 18 mSDtfsCounter, 203 mSDsluCounter, 699 mSDsCounter, 0 mSdLazyCounter, 1299 mSolverCounterSat, 140 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 203 SdHoareTripleChecker+Valid, 430 SdHoareTripleChecker+Invalid, 1439 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 140 IncrementalHoareTripleChecker+Valid, 1299 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-11 00:26:11,425 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [203 Valid, 430 Invalid, 1439 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [140 Valid, 1299 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-11 00:26:11,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 555 states. [2022-02-11 00:26:11,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 555 to 357. [2022-02-11 00:26:11,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 357 states, 356 states have (on average 2.764044943820225) internal successors, (984), 356 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) [2022-02-11 00:26:11,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 357 states to 357 states and 984 transitions. [2022-02-11 00:26:11,430 INFO L78 Accepts]: Start accepts. Automaton has 357 states and 984 transitions. Word has length 18 [2022-02-11 00:26:11,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:26:11,430 INFO L470 AbstractCegarLoop]: Abstraction has 357 states and 984 transitions. [2022-02-11 00:26:11,430 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.4482758620689655) internal successors, (42), 29 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:26:11,430 INFO L276 IsEmpty]: Start isEmpty. Operand 357 states and 984 transitions. [2022-02-11 00:26:11,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-02-11 00:26:11,430 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:26:11,430 INFO L515 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:26:11,446 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (140)] Ended with exit code 0 [2022-02-11 00:26:11,646 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 140 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable147 [2022-02-11 00:26:11,646 INFO L402 AbstractCegarLoop]: === Iteration 149 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:26:11,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:26:11,647 INFO L85 PathProgramCache]: Analyzing trace with hash -1336424373, now seen corresponding path program 140 times [2022-02-11 00:26:11,647 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:26:11,647 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1700540536] [2022-02-11 00:26:11,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:26:11,647 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:26:11,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:26:11,951 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:26:11,951 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:26:11,951 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1700540536] [2022-02-11 00:26:11,951 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1700540536] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:26:11,951 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [519258873] [2022-02-11 00:26:11,951 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-11 00:26:11,952 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:26:11,952 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:26:11,953 INFO L229 MonitoredProcess]: Starting monitored process 141 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:26:11,953 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (141)] Waiting until timeout for monitored process [2022-02-11 00:26:12,001 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-11 00:26:12,002 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:26:12,002 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2022-02-11 00:26:12,003 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:26:12,401 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 59 [2022-02-11 00:26:12,403 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 47 [2022-02-11 00:26:12,516 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:26:12,516 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:26:12,871 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-02-11 00:26:12,871 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 147 treesize of output 120 [2022-02-11 00:26:12,875 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 115 treesize of output 83 [2022-02-11 00:26:13,013 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:26:13,014 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [519258873] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:26:13,014 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:26:13,014 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 11] total 28 [2022-02-11 00:26:13,014 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [870136850] [2022-02-11 00:26:13,014 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:26:13,014 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-02-11 00:26:13,014 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:26:13,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-02-11 00:26:13,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=664, Unknown=0, NotChecked=0, Total=756 [2022-02-11 00:26:13,014 INFO L87 Difference]: Start difference. First operand 357 states and 984 transitions. Second operand has 28 states, 28 states have (on average 1.5) internal successors, (42), 28 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:26:14,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:26:14,016 INFO L93 Difference]: Finished difference Result 529 states and 1325 transitions. [2022-02-11 00:26:14,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-02-11 00:26:14,016 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.5) internal successors, (42), 28 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-02-11 00:26:14,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:26:14,017 INFO L225 Difference]: With dead ends: 529 [2022-02-11 00:26:14,017 INFO L226 Difference]: Without dead ends: 509 [2022-02-11 00:26:14,017 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 285 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=208, Invalid=1352, Unknown=0, NotChecked=0, Total=1560 [2022-02-11 00:26:14,018 INFO L934 BasicCegarLoop]: 23 mSDtfsCounter, 104 mSDsluCounter, 751 mSDsCounter, 0 mSdLazyCounter, 1303 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 454 SdHoareTripleChecker+Invalid, 1346 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 1303 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-11 00:26:14,018 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [104 Valid, 454 Invalid, 1346 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 1303 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-11 00:26:14,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 509 states. [2022-02-11 00:26:14,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 509 to 389. [2022-02-11 00:26:14,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 389 states, 388 states have (on average 2.804123711340206) internal successors, (1088), 388 states have internal predecessors, (1088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:26:14,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 389 states to 389 states and 1088 transitions. [2022-02-11 00:26:14,023 INFO L78 Accepts]: Start accepts. Automaton has 389 states and 1088 transitions. Word has length 18 [2022-02-11 00:26:14,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:26:14,023 INFO L470 AbstractCegarLoop]: Abstraction has 389 states and 1088 transitions. [2022-02-11 00:26:14,023 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.5) internal successors, (42), 28 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:26:14,023 INFO L276 IsEmpty]: Start isEmpty. Operand 389 states and 1088 transitions. [2022-02-11 00:26:14,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-02-11 00:26:14,024 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:26:14,024 INFO L515 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:26:14,040 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (141)] Ended with exit code 0 [2022-02-11 00:26:14,239 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable148,141 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:26:14,240 INFO L402 AbstractCegarLoop]: === Iteration 150 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:26:14,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:26:14,240 INFO L85 PathProgramCache]: Analyzing trace with hash -1302825145, now seen corresponding path program 141 times [2022-02-11 00:26:14,240 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:26:14,240 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [356495845] [2022-02-11 00:26:14,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:26:14,240 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:26:14,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:26:14,526 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:26:14,526 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:26:14,526 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [356495845] [2022-02-11 00:26:14,526 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [356495845] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:26:14,526 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1609467625] [2022-02-11 00:26:14,526 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-11 00:26:14,526 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:26:14,526 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:26:14,527 INFO L229 MonitoredProcess]: Starting monitored process 142 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:26:14,528 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (142)] Waiting until timeout for monitored process [2022-02-11 00:26:14,583 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-02-11 00:26:14,583 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:26:14,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 42 conjunts are in the unsatisfiable core [2022-02-11 00:26:14,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:26:15,058 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 107 treesize of output 87 [2022-02-11 00:26:15,060 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 59 [2022-02-11 00:26:15,218 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:26:15,218 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:26:15,740 INFO L353 Elim1Store]: treesize reduction 19, result has 42.4 percent of original size [2022-02-11 00:26:15,740 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 146 treesize of output 115 [2022-02-11 00:26:15,742 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:26:15,743 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:26:15,747 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:26:15,747 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 102 treesize of output 68 [2022-02-11 00:26:15,902 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:26:15,902 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1609467625] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:26:15,902 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:26:15,902 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 30 [2022-02-11 00:26:15,902 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1498516369] [2022-02-11 00:26:15,902 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:26:15,902 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-11 00:26:15,902 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:26:15,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-11 00:26:15,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=769, Unknown=0, NotChecked=0, Total=870 [2022-02-11 00:26:15,903 INFO L87 Difference]: Start difference. First operand 389 states and 1088 transitions. Second operand has 30 states, 30 states have (on average 1.4333333333333333) internal successors, (43), 30 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) [2022-02-11 00:26:19,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:26:19,141 INFO L93 Difference]: Finished difference Result 651 states and 1555 transitions. [2022-02-11 00:26:19,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-02-11 00:26:19,142 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.4333333333333333) internal successors, (43), 30 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 18 [2022-02-11 00:26:19,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:26:19,143 INFO L225 Difference]: With dead ends: 651 [2022-02-11 00:26:19,143 INFO L226 Difference]: Without dead ends: 630 [2022-02-11 00:26:19,143 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 592 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=393, Invalid=2577, Unknown=0, NotChecked=0, Total=2970 [2022-02-11 00:26:19,143 INFO L934 BasicCegarLoop]: 15 mSDtfsCounter, 206 mSDsluCounter, 645 mSDsCounter, 0 mSdLazyCounter, 1294 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 206 SdHoareTripleChecker+Valid, 393 SdHoareTripleChecker+Invalid, 1377 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 1294 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-11 00:26:19,143 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [206 Valid, 393 Invalid, 1377 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 1294 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-11 00:26:19,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 630 states. [2022-02-11 00:26:19,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 630 to 399. [2022-02-11 00:26:19,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 399 states, 398 states have (on average 2.821608040201005) internal successors, (1123), 398 states have internal predecessors, (1123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:26:19,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 399 states to 399 states and 1123 transitions. [2022-02-11 00:26:19,149 INFO L78 Accepts]: Start accepts. Automaton has 399 states and 1123 transitions. Word has length 18 [2022-02-11 00:26:19,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:26:19,149 INFO L470 AbstractCegarLoop]: Abstraction has 399 states and 1123 transitions. [2022-02-11 00:26:19,149 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.4333333333333333) internal successors, (43), 30 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) [2022-02-11 00:26:19,149 INFO L276 IsEmpty]: Start isEmpty. Operand 399 states and 1123 transitions. [2022-02-11 00:26:19,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-02-11 00:26:19,150 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:26:19,150 INFO L515 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:26:19,166 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (142)] Ended with exit code 0 [2022-02-11 00:26:19,362 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable149,142 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:26:19,363 INFO L402 AbstractCegarLoop]: === Iteration 151 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:26:19,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:26:19,363 INFO L85 PathProgramCache]: Analyzing trace with hash 776468683, now seen corresponding path program 142 times [2022-02-11 00:26:19,363 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:26:19,363 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1871617446] [2022-02-11 00:26:19,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:26:19,363 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:26:19,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:26:19,566 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:26:19,566 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:26:19,566 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1871617446] [2022-02-11 00:26:19,566 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1871617446] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:26:19,566 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1735154413] [2022-02-11 00:26:19,566 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-11 00:26:19,567 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:26:19,567 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:26:19,567 INFO L229 MonitoredProcess]: Starting monitored process 143 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:26:19,568 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (143)] Waiting until timeout for monitored process [2022-02-11 00:26:19,619 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-11 00:26:19,620 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:26:19,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2022-02-11 00:26:19,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:26:20,014 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 115 treesize of output 95 [2022-02-11 00:26:20,017 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 83 treesize of output 67 [2022-02-11 00:26:20,248 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:26:20,248 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:26:21,042 INFO L353 Elim1Store]: treesize reduction 17, result has 48.5 percent of original size [2022-02-11 00:26:21,042 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 128 treesize of output 103 [2022-02-11 00:26:21,044 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:26:21,045 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:26:21,048 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:26:21,048 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 88 treesize of output 58 [2022-02-11 00:26:21,136 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:26:21,136 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1735154413] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:26:21,136 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:26:21,137 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 29 [2022-02-11 00:26:21,137 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386433485] [2022-02-11 00:26:21,137 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:26:21,137 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-02-11 00:26:21,137 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:26:21,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-02-11 00:26:21,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=718, Unknown=0, NotChecked=0, Total=812 [2022-02-11 00:26:21,137 INFO L87 Difference]: Start difference. First operand 399 states and 1123 transitions. Second operand has 29 states, 29 states have (on average 1.4482758620689655) internal successors, (42), 29 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:26:24,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:26:24,302 INFO L93 Difference]: Finished difference Result 745 states and 1725 transitions. [2022-02-11 00:26:24,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-02-11 00:26:24,303 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.4482758620689655) internal successors, (42), 29 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-02-11 00:26:24,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:26:24,304 INFO L225 Difference]: With dead ends: 745 [2022-02-11 00:26:24,304 INFO L226 Difference]: Without dead ends: 690 [2022-02-11 00:26:24,304 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 854 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=549, Invalid=3233, Unknown=0, NotChecked=0, Total=3782 [2022-02-11 00:26:24,304 INFO L934 BasicCegarLoop]: 11 mSDtfsCounter, 223 mSDsluCounter, 587 mSDsCounter, 0 mSdLazyCounter, 1314 mSolverCounterSat, 153 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 223 SdHoareTripleChecker+Valid, 346 SdHoareTripleChecker+Invalid, 1467 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 153 IncrementalHoareTripleChecker+Valid, 1314 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-11 00:26:24,304 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [223 Valid, 346 Invalid, 1467 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [153 Valid, 1314 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-11 00:26:24,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 690 states. [2022-02-11 00:26:24,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 690 to 410. [2022-02-11 00:26:24,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 410 states, 409 states have (on average 2.8410757946210268) internal successors, (1162), 409 states have internal predecessors, (1162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:26:24,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 410 states to 410 states and 1162 transitions. [2022-02-11 00:26:24,312 INFO L78 Accepts]: Start accepts. Automaton has 410 states and 1162 transitions. Word has length 18 [2022-02-11 00:26:24,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:26:24,312 INFO L470 AbstractCegarLoop]: Abstraction has 410 states and 1162 transitions. [2022-02-11 00:26:24,312 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.4482758620689655) internal successors, (42), 29 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:26:24,312 INFO L276 IsEmpty]: Start isEmpty. Operand 410 states and 1162 transitions. [2022-02-11 00:26:24,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-02-11 00:26:24,313 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:26:24,313 INFO L515 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:26:24,329 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (143)] Forceful destruction successful, exit code 0 [2022-02-11 00:26:24,515 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable150 [2022-02-11 00:26:24,515 INFO L402 AbstractCegarLoop]: === Iteration 152 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:26:24,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:26:24,515 INFO L85 PathProgramCache]: Analyzing trace with hash -51597753, now seen corresponding path program 143 times [2022-02-11 00:26:24,515 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:26:24,515 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [158330553] [2022-02-11 00:26:24,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:26:24,515 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:26:24,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:26:24,639 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:26:24,639 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:26:24,639 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [158330553] [2022-02-11 00:26:24,640 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [158330553] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:26:24,640 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1473439699] [2022-02-11 00:26:24,640 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-11 00:26:24,640 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:26:24,640 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:26:24,651 INFO L229 MonitoredProcess]: Starting monitored process 144 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:26:24,651 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (144)] Waiting until timeout for monitored process [2022-02-11 00:26:24,700 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-02-11 00:26:24,700 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:26:24,701 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 25 conjunts are in the unsatisfiable core [2022-02-11 00:26:24,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:26:24,867 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 87 treesize of output 71 [2022-02-11 00:26:24,869 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 55 [2022-02-11 00:26:24,951 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:26:24,951 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:26:25,088 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:26:25,088 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 34 treesize of output 34 [2022-02-11 00:26:25,093 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:26:25,093 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 26 treesize of output 26 [2022-02-11 00:26:25,194 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:26:25,194 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1473439699] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:26:25,194 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:26:25,194 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2022-02-11 00:26:25,194 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1086191037] [2022-02-11 00:26:25,194 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:26:25,194 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-11 00:26:25,194 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:26:25,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-11 00:26:25,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=318, Unknown=0, NotChecked=0, Total=380 [2022-02-11 00:26:25,195 INFO L87 Difference]: Start difference. First operand 410 states and 1162 transitions. Second operand has 20 states, 20 states have (on average 1.7) internal successors, (34), 20 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:26:25,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:26:25,454 INFO L93 Difference]: Finished difference Result 525 states and 1368 transitions. [2022-02-11 00:26:25,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-02-11 00:26:25,454 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.7) internal successors, (34), 20 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-02-11 00:26:25,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:26:25,455 INFO L225 Difference]: With dead ends: 525 [2022-02-11 00:26:25,455 INFO L226 Difference]: Without dead ends: 525 [2022-02-11 00:26:25,455 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=95, Invalid=411, Unknown=0, NotChecked=0, Total=506 [2022-02-11 00:26:25,455 INFO L934 BasicCegarLoop]: 17 mSDtfsCounter, 86 mSDsluCounter, 261 mSDsCounter, 0 mSdLazyCounter, 490 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 180 SdHoareTripleChecker+Invalid, 515 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 490 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-11 00:26:25,455 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [86 Valid, 180 Invalid, 515 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 490 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-11 00:26:25,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 525 states. [2022-02-11 00:26:25,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 525 to 412. [2022-02-11 00:26:25,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 412 states, 411 states have (on average 2.834549878345499) internal successors, (1165), 411 states have internal predecessors, (1165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:26:25,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 412 states to 412 states and 1165 transitions. [2022-02-11 00:26:25,468 INFO L78 Accepts]: Start accepts. Automaton has 412 states and 1165 transitions. Word has length 18 [2022-02-11 00:26:25,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:26:25,468 INFO L470 AbstractCegarLoop]: Abstraction has 412 states and 1165 transitions. [2022-02-11 00:26:25,468 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.7) internal successors, (34), 20 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:26:25,468 INFO L276 IsEmpty]: Start isEmpty. Operand 412 states and 1165 transitions. [2022-02-11 00:26:25,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-02-11 00:26:25,469 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:26:25,469 INFO L515 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:26:25,485 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (144)] Forceful destruction successful, exit code 0 [2022-02-11 00:26:25,683 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151,144 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:26:25,683 INFO L402 AbstractCegarLoop]: === Iteration 153 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:26:25,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:26:25,683 INFO L85 PathProgramCache]: Analyzing trace with hash 749917063, now seen corresponding path program 144 times [2022-02-11 00:26:25,684 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:26:25,684 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1332112670] [2022-02-11 00:26:25,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:26:25,684 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:26:25,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:26:25,871 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:26:25,872 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:26:25,872 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1332112670] [2022-02-11 00:26:25,872 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1332112670] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:26:25,872 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [126324272] [2022-02-11 00:26:25,872 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-11 00:26:25,872 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:26:25,872 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:26:25,873 INFO L229 MonitoredProcess]: Starting monitored process 145 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:26:25,873 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (145)] Waiting until timeout for monitored process [2022-02-11 00:26:25,922 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-02-11 00:26:25,922 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:26:25,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2022-02-11 00:26:25,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:26:26,275 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 99 treesize of output 83 [2022-02-11 00:26:26,277 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 83 treesize of output 67 [2022-02-11 00:26:26,566 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:26:26,566 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:26:26,874 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-11 00:26:26,874 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 106 treesize of output 93 [2022-02-11 00:26:26,877 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 90 treesize of output 74 [2022-02-11 00:26:27,033 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:26:27,033 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [126324272] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:26:27,033 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:26:27,033 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 10] total 27 [2022-02-11 00:26:27,033 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [778883527] [2022-02-11 00:26:27,033 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:26:27,033 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-11 00:26:27,033 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:26:27,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-11 00:26:27,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=609, Unknown=0, NotChecked=0, Total=702 [2022-02-11 00:26:27,033 INFO L87 Difference]: Start difference. First operand 412 states and 1165 transitions. Second operand has 27 states, 27 states have (on average 1.5185185185185186) internal successors, (41), 27 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) [2022-02-11 00:26:28,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:26:28,892 INFO L93 Difference]: Finished difference Result 626 states and 1504 transitions. [2022-02-11 00:26:28,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-02-11 00:26:28,892 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.5185185185185186) internal successors, (41), 27 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 18 [2022-02-11 00:26:28,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:26:28,893 INFO L225 Difference]: With dead ends: 626 [2022-02-11 00:26:28,893 INFO L226 Difference]: Without dead ends: 576 [2022-02-11 00:26:28,893 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 636 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=405, Invalid=2351, Unknown=0, NotChecked=0, Total=2756 [2022-02-11 00:26:28,893 INFO L934 BasicCegarLoop]: 17 mSDtfsCounter, 181 mSDsluCounter, 594 mSDsCounter, 0 mSdLazyCounter, 971 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 181 SdHoareTripleChecker+Valid, 354 SdHoareTripleChecker+Invalid, 1062 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 971 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-11 00:26:28,894 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [181 Valid, 354 Invalid, 1062 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 971 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-11 00:26:28,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 576 states. [2022-02-11 00:26:28,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 576 to 411. [2022-02-11 00:26:28,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 411 states, 410 states have (on average 2.8268292682926828) internal successors, (1159), 410 states have internal predecessors, (1159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:26:28,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 411 states to 411 states and 1159 transitions. [2022-02-11 00:26:28,899 INFO L78 Accepts]: Start accepts. Automaton has 411 states and 1159 transitions. Word has length 18 [2022-02-11 00:26:28,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:26:28,899 INFO L470 AbstractCegarLoop]: Abstraction has 411 states and 1159 transitions. [2022-02-11 00:26:28,899 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.5185185185185186) internal successors, (41), 27 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) [2022-02-11 00:26:28,899 INFO L276 IsEmpty]: Start isEmpty. Operand 411 states and 1159 transitions. [2022-02-11 00:26:28,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-02-11 00:26:28,900 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:26:28,900 INFO L515 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:26:28,916 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (145)] Ended with exit code 0 [2022-02-11 00:26:29,100 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152,145 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:26:29,100 INFO L402 AbstractCegarLoop]: === Iteration 154 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:26:29,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:26:29,100 INFO L85 PathProgramCache]: Analyzing trace with hash -510455417, now seen corresponding path program 145 times [2022-02-11 00:26:29,101 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:26:29,101 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [770111180] [2022-02-11 00:26:29,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:26:29,101 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:26:29,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:26:29,299 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:26:29,299 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:26:29,299 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [770111180] [2022-02-11 00:26:29,299 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [770111180] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:26:29,299 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1005866696] [2022-02-11 00:26:29,299 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-11 00:26:29,299 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:26:29,299 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:26:29,300 INFO L229 MonitoredProcess]: Starting monitored process 146 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:26:29,301 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (146)] Waiting until timeout for monitored process [2022-02-11 00:26:29,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:26:29,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2022-02-11 00:26:29,349 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:26:29,718 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 106 treesize of output 90 [2022-02-11 00:26:29,729 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 90 treesize of output 74 [2022-02-11 00:26:30,021 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:26:30,021 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:26:30,385 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-11 00:26:30,385 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 105 treesize of output 92 [2022-02-11 00:26:30,388 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 73 [2022-02-11 00:26:30,509 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-11 00:26:30,510 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1005866696] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:26:30,510 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:26:30,510 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 9] total 26 [2022-02-11 00:26:30,510 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1511101626] [2022-02-11 00:26:30,510 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:26:30,510 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-11 00:26:30,510 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:26:30,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-11 00:26:30,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=562, Unknown=0, NotChecked=0, Total=650 [2022-02-11 00:26:30,510 INFO L87 Difference]: Start difference. First operand 411 states and 1159 transitions. Second operand has 26 states, 26 states have (on average 1.5) internal successors, (39), 26 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) [2022-02-11 00:26:31,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:26:31,122 INFO L93 Difference]: Finished difference Result 518 states and 1337 transitions. [2022-02-11 00:26:31,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-02-11 00:26:31,122 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.5) internal successors, (39), 26 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 18 [2022-02-11 00:26:31,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:26:31,123 INFO L225 Difference]: With dead ends: 518 [2022-02-11 00:26:31,123 INFO L226 Difference]: Without dead ends: 501 [2022-02-11 00:26:31,123 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 203 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=157, Invalid=899, Unknown=0, NotChecked=0, Total=1056 [2022-02-11 00:26:31,123 INFO L934 BasicCegarLoop]: 11 mSDtfsCounter, 83 mSDsluCounter, 334 mSDsCounter, 0 mSdLazyCounter, 636 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 194 SdHoareTripleChecker+Invalid, 677 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 636 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-11 00:26:31,123 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [83 Valid, 194 Invalid, 677 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 636 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-11 00:26:31,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 501 states. [2022-02-11 00:26:31,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 501 to 412. [2022-02-11 00:26:31,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 412 states, 411 states have (on average 2.827250608272506) internal successors, (1162), 411 states have internal predecessors, (1162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:26:31,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 412 states to 412 states and 1162 transitions. [2022-02-11 00:26:31,128 INFO L78 Accepts]: Start accepts. Automaton has 412 states and 1162 transitions. Word has length 18 [2022-02-11 00:26:31,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:26:31,128 INFO L470 AbstractCegarLoop]: Abstraction has 412 states and 1162 transitions. [2022-02-11 00:26:31,128 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.5) internal successors, (39), 26 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) [2022-02-11 00:26:31,128 INFO L276 IsEmpty]: Start isEmpty. Operand 412 states and 1162 transitions. [2022-02-11 00:26:31,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-02-11 00:26:31,129 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:26:31,129 INFO L515 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:26:31,145 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (146)] Forceful destruction successful, exit code 0 [2022-02-11 00:26:31,329 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153,146 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:26:31,329 INFO L402 AbstractCegarLoop]: === Iteration 155 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:26:31,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:26:31,330 INFO L85 PathProgramCache]: Analyzing trace with hash -2087797147, now seen corresponding path program 146 times [2022-02-11 00:26:31,330 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:26:31,330 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1433263634] [2022-02-11 00:26:31,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:26:31,330 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:26:31,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:26:31,508 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:26:31,508 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:26:31,508 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1433263634] [2022-02-11 00:26:31,508 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1433263634] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:26:31,508 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1173958192] [2022-02-11 00:26:31,508 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-11 00:26:31,508 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:26:31,508 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:26:31,509 INFO L229 MonitoredProcess]: Starting monitored process 147 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:26:31,509 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (147)] Waiting until timeout for monitored process [2022-02-11 00:26:31,557 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-11 00:26:31,557 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:26:31,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2022-02-11 00:26:31,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:26:31,991 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 57 [2022-02-11 00:26:31,993 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 45 [2022-02-11 00:26:32,154 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:26:32,155 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:26:32,438 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-11 00:26:32,439 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 123 treesize of output 106 [2022-02-11 00:26:32,443 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 103 treesize of output 83 [2022-02-11 00:26:32,565 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-02-11 00:26:32,565 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1173958192] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:26:32,565 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:26:32,565 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 9] total 26 [2022-02-11 00:26:32,565 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075314071] [2022-02-11 00:26:32,565 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:26:32,566 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-11 00:26:32,566 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:26:32,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-11 00:26:32,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=555, Unknown=0, NotChecked=0, Total=650 [2022-02-11 00:26:32,566 INFO L87 Difference]: Start difference. First operand 412 states and 1162 transitions. Second operand has 26 states, 26 states have (on average 1.5) internal successors, (39), 26 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) [2022-02-11 00:26:33,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:26:33,580 INFO L93 Difference]: Finished difference Result 494 states and 1295 transitions. [2022-02-11 00:26:33,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-02-11 00:26:33,581 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.5) internal successors, (39), 26 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 18 [2022-02-11 00:26:33,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:26:33,581 INFO L225 Difference]: With dead ends: 494 [2022-02-11 00:26:33,581 INFO L226 Difference]: Without dead ends: 467 [2022-02-11 00:26:33,582 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 398 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=287, Invalid=1519, Unknown=0, NotChecked=0, Total=1806 [2022-02-11 00:26:33,582 INFO L934 BasicCegarLoop]: 11 mSDtfsCounter, 131 mSDsluCounter, 415 mSDsCounter, 0 mSdLazyCounter, 693 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 229 SdHoareTripleChecker+Invalid, 748 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 693 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-11 00:26:33,582 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [131 Valid, 229 Invalid, 748 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 693 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-11 00:26:33,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 467 states. [2022-02-11 00:26:33,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 467 to 412. [2022-02-11 00:26:33,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 412 states, 411 states have (on average 2.8248175182481754) internal successors, (1161), 411 states have internal predecessors, (1161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:26:33,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 412 states to 412 states and 1161 transitions. [2022-02-11 00:26:33,587 INFO L78 Accepts]: Start accepts. Automaton has 412 states and 1161 transitions. Word has length 18 [2022-02-11 00:26:33,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:26:33,587 INFO L470 AbstractCegarLoop]: Abstraction has 412 states and 1161 transitions. [2022-02-11 00:26:33,587 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.5) internal successors, (39), 26 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) [2022-02-11 00:26:33,587 INFO L276 IsEmpty]: Start isEmpty. Operand 412 states and 1161 transitions. [2022-02-11 00:26:33,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-02-11 00:26:33,588 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:26:33,588 INFO L515 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:26:33,614 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (147)] Ended with exit code 0 [2022-02-11 00:26:33,803 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154,147 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:26:33,803 INFO L402 AbstractCegarLoop]: === Iteration 156 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:26:33,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:26:33,803 INFO L85 PathProgramCache]: Analyzing trace with hash -552467833, now seen corresponding path program 147 times [2022-02-11 00:26:33,804 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:26:33,804 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2025837618] [2022-02-11 00:26:33,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:26:33,804 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:26:33,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:26:34,016 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:26:34,016 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:26:34,016 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2025837618] [2022-02-11 00:26:34,017 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2025837618] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:26:34,017 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1163651470] [2022-02-11 00:26:34,017 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-11 00:26:34,017 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:26:34,017 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:26:34,018 INFO L229 MonitoredProcess]: Starting monitored process 148 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:26:34,018 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (148)] Waiting until timeout for monitored process [2022-02-11 00:26:34,069 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-02-11 00:26:34,069 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:26:34,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 39 conjunts are in the unsatisfiable core [2022-02-11 00:26:34,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:26:34,419 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 101 treesize of output 85 [2022-02-11 00:26:34,421 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 85 treesize of output 69 [2022-02-11 00:26:34,655 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:26:34,655 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:26:34,997 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-02-11 00:26:34,998 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 119 treesize of output 100 [2022-02-11 00:26:35,001 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 95 treesize of output 71 [2022-02-11 00:26:35,124 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:26:35,124 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1163651470] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:26:35,124 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:26:35,124 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 10] total 27 [2022-02-11 00:26:35,124 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [980786928] [2022-02-11 00:26:35,125 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:26:35,125 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-11 00:26:35,125 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:26:35,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-11 00:26:35,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=617, Unknown=0, NotChecked=0, Total=702 [2022-02-11 00:26:35,125 INFO L87 Difference]: Start difference. First operand 412 states and 1161 transitions. Second operand has 27 states, 27 states have (on average 1.4814814814814814) internal successors, (40), 27 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) [2022-02-11 00:26:36,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:26:36,247 INFO L93 Difference]: Finished difference Result 557 states and 1407 transitions. [2022-02-11 00:26:36,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-02-11 00:26:36,247 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.4814814814814814) internal successors, (40), 27 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 18 [2022-02-11 00:26:36,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:26:36,248 INFO L225 Difference]: With dead ends: 557 [2022-02-11 00:26:36,248 INFO L226 Difference]: Without dead ends: 518 [2022-02-11 00:26:36,248 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 340 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=238, Invalid=1568, Unknown=0, NotChecked=0, Total=1806 [2022-02-11 00:26:36,248 INFO L934 BasicCegarLoop]: 15 mSDtfsCounter, 155 mSDsluCounter, 437 mSDsCounter, 0 mSdLazyCounter, 836 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 155 SdHoareTripleChecker+Valid, 253 SdHoareTripleChecker+Invalid, 925 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 836 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-11 00:26:36,248 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [155 Valid, 253 Invalid, 925 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 836 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-11 00:26:36,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 518 states. [2022-02-11 00:26:36,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 518 to 415. [2022-02-11 00:26:36,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 415 states, 414 states have (on average 2.823671497584541) internal successors, (1169), 414 states have internal predecessors, (1169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:26:36,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 415 states to 415 states and 1169 transitions. [2022-02-11 00:26:36,253 INFO L78 Accepts]: Start accepts. Automaton has 415 states and 1169 transitions. Word has length 18 [2022-02-11 00:26:36,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:26:36,253 INFO L470 AbstractCegarLoop]: Abstraction has 415 states and 1169 transitions. [2022-02-11 00:26:36,254 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.4814814814814814) internal successors, (40), 27 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) [2022-02-11 00:26:36,254 INFO L276 IsEmpty]: Start isEmpty. Operand 415 states and 1169 transitions. [2022-02-11 00:26:36,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-02-11 00:26:36,254 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:26:36,254 INFO L515 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:26:36,270 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (148)] Ended with exit code 0 [2022-02-11 00:26:36,454 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 148 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable155 [2022-02-11 00:26:36,455 INFO L402 AbstractCegarLoop]: === Iteration 157 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:26:36,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:26:36,455 INFO L85 PathProgramCache]: Analyzing trace with hash -915267137, now seen corresponding path program 148 times [2022-02-11 00:26:36,455 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:26:36,455 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2079497394] [2022-02-11 00:26:36,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:26:36,455 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:26:36,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:26:36,711 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:26:36,712 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:26:36,712 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2079497394] [2022-02-11 00:26:36,712 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2079497394] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:26:36,712 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [794138296] [2022-02-11 00:26:36,712 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-11 00:26:36,712 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:26:36,712 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:26:36,713 INFO L229 MonitoredProcess]: Starting monitored process 149 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:26:36,713 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (149)] Waiting until timeout for monitored process [2022-02-11 00:26:36,762 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-11 00:26:36,762 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:26:36,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2022-02-11 00:26:36,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:26:37,160 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 59 [2022-02-11 00:26:37,162 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 47 [2022-02-11 00:26:37,273 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:26:37,273 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:26:37,587 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-11 00:26:37,587 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 125 treesize of output 108 [2022-02-11 00:26:37,591 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 105 treesize of output 85 [2022-02-11 00:26:37,737 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:26:37,737 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [794138296] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:26:37,737 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:26:37,737 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 10] total 27 [2022-02-11 00:26:37,737 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1212252295] [2022-02-11 00:26:37,737 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:26:37,737 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-11 00:26:37,738 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:26:37,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-11 00:26:37,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=610, Unknown=0, NotChecked=0, Total=702 [2022-02-11 00:26:37,738 INFO L87 Difference]: Start difference. First operand 415 states and 1169 transitions. Second operand has 27 states, 27 states have (on average 1.5555555555555556) internal successors, (42), 27 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:26:38,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:26:38,607 INFO L93 Difference]: Finished difference Result 578 states and 1470 transitions. [2022-02-11 00:26:38,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-02-11 00:26:38,608 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.5555555555555556) internal successors, (42), 27 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-02-11 00:26:38,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:26:38,608 INFO L225 Difference]: With dead ends: 578 [2022-02-11 00:26:38,608 INFO L226 Difference]: Without dead ends: 560 [2022-02-11 00:26:38,609 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=226, Invalid=1106, Unknown=0, NotChecked=0, Total=1332 [2022-02-11 00:26:38,609 INFO L934 BasicCegarLoop]: 11 mSDtfsCounter, 133 mSDsluCounter, 489 mSDsCounter, 0 mSdLazyCounter, 925 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 284 SdHoareTripleChecker+Invalid, 986 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 925 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-11 00:26:38,609 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [133 Valid, 284 Invalid, 986 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 925 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-11 00:26:38,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 560 states. [2022-02-11 00:26:38,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 560 to 430. [2022-02-11 00:26:38,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 430 states, 429 states have (on average 2.8275058275058274) internal successors, (1213), 429 states have internal predecessors, (1213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:26:38,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 430 states to 430 states and 1213 transitions. [2022-02-11 00:26:38,614 INFO L78 Accepts]: Start accepts. Automaton has 430 states and 1213 transitions. Word has length 18 [2022-02-11 00:26:38,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:26:38,615 INFO L470 AbstractCegarLoop]: Abstraction has 430 states and 1213 transitions. [2022-02-11 00:26:38,615 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.5555555555555556) internal successors, (42), 27 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:26:38,615 INFO L276 IsEmpty]: Start isEmpty. Operand 430 states and 1213 transitions. [2022-02-11 00:26:38,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-02-11 00:26:38,615 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:26:38,615 INFO L515 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:26:38,631 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (149)] Ended with exit code 0 [2022-02-11 00:26:38,815 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 149 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable156 [2022-02-11 00:26:38,816 INFO L402 AbstractCegarLoop]: === Iteration 158 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:26:38,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:26:38,816 INFO L85 PathProgramCache]: Analyzing trace with hash 1164026691, now seen corresponding path program 149 times [2022-02-11 00:26:38,816 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:26:38,816 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1329152602] [2022-02-11 00:26:38,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:26:38,816 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:26:38,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:26:39,030 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:26:39,031 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:26:39,031 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1329152602] [2022-02-11 00:26:39,031 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1329152602] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:26:39,031 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [913098899] [2022-02-11 00:26:39,031 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-11 00:26:39,031 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:26:39,031 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:26:39,032 INFO L229 MonitoredProcess]: Starting monitored process 150 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:26:39,057 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (150)] Waiting until timeout for monitored process [2022-02-11 00:26:39,087 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-02-11 00:26:39,087 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:26:39,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2022-02-11 00:26:39,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:26:39,456 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 104 treesize of output 88 [2022-02-11 00:26:39,458 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 88 treesize of output 72 [2022-02-11 00:26:39,768 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:26:39,769 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:26:40,179 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-11 00:26:40,180 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 120 treesize of output 103 [2022-02-11 00:26:40,183 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 100 treesize of output 80 [2022-02-11 00:26:40,338 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:26:40,338 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [913098899] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:26:40,338 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:26:40,338 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 10] total 27 [2022-02-11 00:26:40,338 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1767784913] [2022-02-11 00:26:40,338 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:26:40,338 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-11 00:26:40,338 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:26:40,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-11 00:26:40,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=613, Unknown=0, NotChecked=0, Total=702 [2022-02-11 00:26:40,339 INFO L87 Difference]: Start difference. First operand 430 states and 1213 transitions. Second operand has 27 states, 27 states have (on average 1.5555555555555556) internal successors, (42), 27 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:26:41,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:26:41,473 INFO L93 Difference]: Finished difference Result 638 states and 1564 transitions. [2022-02-11 00:26:41,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-02-11 00:26:41,474 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.5555555555555556) internal successors, (42), 27 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-02-11 00:26:41,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:26:41,475 INFO L225 Difference]: With dead ends: 638 [2022-02-11 00:26:41,475 INFO L226 Difference]: Without dead ends: 605 [2022-02-11 00:26:41,475 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 283 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=252, Invalid=1308, Unknown=0, NotChecked=0, Total=1560 [2022-02-11 00:26:41,475 INFO L934 BasicCegarLoop]: 14 mSDtfsCounter, 186 mSDsluCounter, 584 mSDsCounter, 0 mSdLazyCounter, 1000 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 186 SdHoareTripleChecker+Valid, 362 SdHoareTripleChecker+Invalid, 1088 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 1000 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-11 00:26:41,475 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [186 Valid, 362 Invalid, 1088 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 1000 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-11 00:26:41,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 605 states. [2022-02-11 00:26:41,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 605 to 431. [2022-02-11 00:26:41,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 431 states, 430 states have (on average 2.8255813953488373) internal successors, (1215), 430 states have internal predecessors, (1215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:26:41,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 431 states to 431 states and 1215 transitions. [2022-02-11 00:26:41,481 INFO L78 Accepts]: Start accepts. Automaton has 431 states and 1215 transitions. Word has length 18 [2022-02-11 00:26:41,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:26:41,481 INFO L470 AbstractCegarLoop]: Abstraction has 431 states and 1215 transitions. [2022-02-11 00:26:41,481 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.5555555555555556) internal successors, (42), 27 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:26:41,481 INFO L276 IsEmpty]: Start isEmpty. Operand 431 states and 1215 transitions. [2022-02-11 00:26:41,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-02-11 00:26:41,481 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:26:41,481 INFO L515 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:26:41,498 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (150)] Forceful destruction successful, exit code 0 [2022-02-11 00:26:41,682 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable157 [2022-02-11 00:26:41,682 INFO L402 AbstractCegarLoop]: === Iteration 159 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:26:41,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:26:41,682 INFO L85 PathProgramCache]: Analyzing trace with hash -984769845, now seen corresponding path program 150 times [2022-02-11 00:26:41,682 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:26:41,682 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [428337583] [2022-02-11 00:26:41,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:26:41,683 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:26:41,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:26:41,879 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:26:41,880 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:26:41,880 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [428337583] [2022-02-11 00:26:41,880 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [428337583] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:26:41,880 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [193851403] [2022-02-11 00:26:41,880 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-11 00:26:41,880 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:26:41,880 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:26:41,881 INFO L229 MonitoredProcess]: Starting monitored process 151 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:26:41,881 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (151)] Waiting until timeout for monitored process [2022-02-11 00:26:41,934 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-02-11 00:26:41,934 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:26:41,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 43 conjunts are in the unsatisfiable core [2022-02-11 00:26:41,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:26:42,325 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 115 treesize of output 95 [2022-02-11 00:26:42,331 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 83 treesize of output 67 [2022-02-11 00:26:42,607 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:26:42,608 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:26:43,429 INFO L353 Elim1Store]: treesize reduction 15, result has 48.3 percent of original size [2022-02-11 00:26:43,430 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 121 treesize of output 102 [2022-02-11 00:26:43,433 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:26:43,437 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:26:43,437 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 89 treesize of output 65 [2022-02-11 00:26:43,600 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:26:43,600 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [193851403] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:26:43,601 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:26:43,601 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 30 [2022-02-11 00:26:43,601 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1471894118] [2022-02-11 00:26:43,601 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:26:43,601 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-11 00:26:43,601 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:26:43,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-11 00:26:43,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=750, Unknown=0, NotChecked=0, Total=870 [2022-02-11 00:26:43,602 INFO L87 Difference]: Start difference. First operand 431 states and 1215 transitions. Second operand has 30 states, 30 states have (on average 1.4333333333333333) internal successors, (43), 30 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) [2022-02-11 00:26:48,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:26:48,249 INFO L93 Difference]: Finished difference Result 754 states and 1791 transitions. [2022-02-11 00:26:48,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-02-11 00:26:48,249 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.4333333333333333) internal successors, (43), 30 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 18 [2022-02-11 00:26:48,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:26:48,250 INFO L225 Difference]: With dead ends: 754 [2022-02-11 00:26:48,250 INFO L226 Difference]: Without dead ends: 697 [2022-02-11 00:26:48,251 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1359 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=885, Invalid=4517, Unknown=0, NotChecked=0, Total=5402 [2022-02-11 00:26:48,251 INFO L934 BasicCegarLoop]: 15 mSDtfsCounter, 375 mSDsluCounter, 679 mSDsCounter, 0 mSdLazyCounter, 1231 mSolverCounterSat, 220 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 375 SdHoareTripleChecker+Valid, 421 SdHoareTripleChecker+Invalid, 1451 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 220 IncrementalHoareTripleChecker+Valid, 1231 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-11 00:26:48,251 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [375 Valid, 421 Invalid, 1451 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [220 Valid, 1231 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-11 00:26:48,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 697 states. [2022-02-11 00:26:48,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 697 to 455. [2022-02-11 00:26:48,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 455 states, 454 states have (on average 2.8634361233480177) internal successors, (1300), 454 states have internal predecessors, (1300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:26:48,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 455 states to 455 states and 1300 transitions. [2022-02-11 00:26:48,257 INFO L78 Accepts]: Start accepts. Automaton has 455 states and 1300 transitions. Word has length 18 [2022-02-11 00:26:48,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:26:48,257 INFO L470 AbstractCegarLoop]: Abstraction has 455 states and 1300 transitions. [2022-02-11 00:26:48,257 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.4333333333333333) internal successors, (43), 30 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) [2022-02-11 00:26:48,257 INFO L276 IsEmpty]: Start isEmpty. Operand 455 states and 1300 transitions. [2022-02-11 00:26:48,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-02-11 00:26:48,258 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:26:48,258 INFO L515 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:26:48,274 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (151)] Ended with exit code 0 [2022-02-11 00:26:48,458 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 151 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable158 [2022-02-11 00:26:48,458 INFO L402 AbstractCegarLoop]: === Iteration 160 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:26:48,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:26:48,458 INFO L85 PathProgramCache]: Analyzing trace with hash 1122014275, now seen corresponding path program 151 times [2022-02-11 00:26:48,458 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:26:48,459 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1330655383] [2022-02-11 00:26:48,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:26:48,459 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:26:48,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:26:48,668 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:26:48,668 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:26:48,668 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1330655383] [2022-02-11 00:26:48,668 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1330655383] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:26:48,668 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [49883294] [2022-02-11 00:26:48,668 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-11 00:26:48,668 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:26:48,668 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:26:48,669 INFO L229 MonitoredProcess]: Starting monitored process 152 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:26:48,669 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (152)] Waiting until timeout for monitored process [2022-02-11 00:26:48,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:26:48,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 39 conjunts are in the unsatisfiable core [2022-02-11 00:26:48,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:26:49,064 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 95 treesize of output 79 [2022-02-11 00:26:49,066 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 79 treesize of output 63 [2022-02-11 00:26:49,302 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:26:49,302 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:26:49,685 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-02-11 00:26:49,686 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 119 treesize of output 100 [2022-02-11 00:26:49,689 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 95 treesize of output 71 [2022-02-11 00:26:49,803 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:26:49,803 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [49883294] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:26:49,803 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:26:49,803 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 11] total 28 [2022-02-11 00:26:49,803 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [908775829] [2022-02-11 00:26:49,803 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:26:49,804 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-02-11 00:26:49,804 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:26:49,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-02-11 00:26:49,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=674, Unknown=0, NotChecked=0, Total=756 [2022-02-11 00:26:49,804 INFO L87 Difference]: Start difference. First operand 455 states and 1300 transitions. Second operand has 28 states, 28 states have (on average 1.5) internal successors, (42), 28 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:26:52,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:26:52,941 INFO L93 Difference]: Finished difference Result 743 states and 1786 transitions. [2022-02-11 00:26:52,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-02-11 00:26:52,941 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.5) internal successors, (42), 28 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-02-11 00:26:52,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:26:52,942 INFO L225 Difference]: With dead ends: 743 [2022-02-11 00:26:52,942 INFO L226 Difference]: Without dead ends: 655 [2022-02-11 00:26:52,942 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 791 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=575, Invalid=3331, Unknown=0, NotChecked=0, Total=3906 [2022-02-11 00:26:52,942 INFO L934 BasicCegarLoop]: 21 mSDtfsCounter, 279 mSDsluCounter, 755 mSDsCounter, 0 mSdLazyCounter, 1248 mSolverCounterSat, 158 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 279 SdHoareTripleChecker+Valid, 446 SdHoareTripleChecker+Invalid, 1406 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 158 IncrementalHoareTripleChecker+Valid, 1248 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-11 00:26:52,942 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [279 Valid, 446 Invalid, 1406 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [158 Valid, 1248 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-11 00:26:52,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 655 states. [2022-02-11 00:26:52,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 655 to 443. [2022-02-11 00:26:52,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 443 states, 442 states have (on average 2.834841628959276) internal successors, (1253), 442 states have internal predecessors, (1253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:26:52,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 443 states to 443 states and 1253 transitions. [2022-02-11 00:26:52,948 INFO L78 Accepts]: Start accepts. Automaton has 443 states and 1253 transitions. Word has length 18 [2022-02-11 00:26:52,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:26:52,948 INFO L470 AbstractCegarLoop]: Abstraction has 443 states and 1253 transitions. [2022-02-11 00:26:52,948 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.5) internal successors, (42), 28 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:26:52,948 INFO L276 IsEmpty]: Start isEmpty. Operand 443 states and 1253 transitions. [2022-02-11 00:26:52,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-02-11 00:26:52,949 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:26:52,949 INFO L515 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:26:52,965 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (152)] Ended with exit code 0 [2022-02-11 00:26:53,149 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 152 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable159 [2022-02-11 00:26:53,149 INFO L402 AbstractCegarLoop]: === Iteration 161 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:26:53,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:26:53,149 INFO L85 PathProgramCache]: Analyzing trace with hash 2007812555, now seen corresponding path program 152 times [2022-02-11 00:26:53,149 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:26:53,149 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [314244360] [2022-02-11 00:26:53,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:26:53,150 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:26:53,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:26:53,371 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:26:53,371 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:26:53,371 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [314244360] [2022-02-11 00:26:53,371 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [314244360] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:26:53,371 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [278173367] [2022-02-11 00:26:53,371 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-11 00:26:53,371 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:26:53,371 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:26:53,372 INFO L229 MonitoredProcess]: Starting monitored process 153 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:26:53,373 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (153)] Waiting until timeout for monitored process [2022-02-11 00:26:53,422 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-11 00:26:53,422 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:26:53,423 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 39 conjunts are in the unsatisfiable core [2022-02-11 00:26:53,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:26:53,794 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 93 treesize of output 77 [2022-02-11 00:26:53,813 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 77 treesize of output 61 [2022-02-11 00:26:54,038 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:26:54,038 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:26:54,468 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-02-11 00:26:54,468 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 122 treesize of output 103 [2022-02-11 00:26:54,471 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 98 treesize of output 74 [2022-02-11 00:26:54,590 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:26:54,590 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [278173367] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:26:54,590 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:26:54,591 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 30 [2022-02-11 00:26:54,591 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1405053966] [2022-02-11 00:26:54,591 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:26:54,591 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-11 00:26:54,591 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:26:54,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-11 00:26:54,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=789, Unknown=0, NotChecked=0, Total=870 [2022-02-11 00:26:54,591 INFO L87 Difference]: Start difference. First operand 443 states and 1253 transitions. Second operand has 30 states, 30 states have (on average 1.4333333333333333) internal successors, (43), 30 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) [2022-02-11 00:26:58,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:26:58,760 INFO L93 Difference]: Finished difference Result 728 states and 1747 transitions. [2022-02-11 00:26:58,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-02-11 00:26:58,760 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.4333333333333333) internal successors, (43), 30 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 18 [2022-02-11 00:26:58,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:26:58,761 INFO L225 Difference]: With dead ends: 728 [2022-02-11 00:26:58,761 INFO L226 Difference]: Without dead ends: 662 [2022-02-11 00:26:58,762 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1049 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=688, Invalid=4282, Unknown=0, NotChecked=0, Total=4970 [2022-02-11 00:26:58,762 INFO L934 BasicCegarLoop]: 24 mSDtfsCounter, 355 mSDsluCounter, 866 mSDsCounter, 0 mSdLazyCounter, 1508 mSolverCounterSat, 234 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 355 SdHoareTripleChecker+Valid, 522 SdHoareTripleChecker+Invalid, 1742 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 234 IncrementalHoareTripleChecker+Valid, 1508 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-11 00:26:58,762 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [355 Valid, 522 Invalid, 1742 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [234 Valid, 1508 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-11 00:26:58,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 662 states. [2022-02-11 00:26:58,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 662 to 456. [2022-02-11 00:26:58,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 456 states, 455 states have (on average 2.8263736263736265) internal successors, (1286), 455 states have internal predecessors, (1286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:26:58,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 456 states to 456 states and 1286 transitions. [2022-02-11 00:26:58,768 INFO L78 Accepts]: Start accepts. Automaton has 456 states and 1286 transitions. Word has length 18 [2022-02-11 00:26:58,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:26:58,768 INFO L470 AbstractCegarLoop]: Abstraction has 456 states and 1286 transitions. [2022-02-11 00:26:58,768 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.4333333333333333) internal successors, (43), 30 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) [2022-02-11 00:26:58,768 INFO L276 IsEmpty]: Start isEmpty. Operand 456 states and 1286 transitions. [2022-02-11 00:26:58,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-02-11 00:26:58,769 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:26:58,769 INFO L515 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:26:58,790 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (153)] Forceful destruction successful, exit code 0 [2022-02-11 00:26:58,969 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160,153 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:26:58,969 INFO L402 AbstractCegarLoop]: === Iteration 162 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:26:58,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:26:58,969 INFO L85 PathProgramCache]: Analyzing trace with hash -2024987449, now seen corresponding path program 153 times [2022-02-11 00:26:58,969 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:26:58,970 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1593477025] [2022-02-11 00:26:58,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:26:58,970 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:26:58,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:26:59,187 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:26:59,187 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:26:59,187 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1593477025] [2022-02-11 00:26:59,188 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1593477025] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:26:59,188 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [255412866] [2022-02-11 00:26:59,188 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-11 00:26:59,188 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:26:59,188 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:26:59,189 INFO L229 MonitoredProcess]: Starting monitored process 154 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:26:59,189 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (154)] Waiting until timeout for monitored process [2022-02-11 00:26:59,240 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-11 00:26:59,240 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:26:59,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 43 conjunts are in the unsatisfiable core [2022-02-11 00:26:59,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:26:59,659 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 59 [2022-02-11 00:26:59,661 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 47 [2022-02-11 00:26:59,798 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:26:59,798 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:27:00,193 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-02-11 00:27:00,193 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 147 treesize of output 120 [2022-02-11 00:27:00,196 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 115 treesize of output 83 [2022-02-11 00:27:00,316 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:27:00,317 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [255412866] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:27:00,317 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:27:00,317 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 30 [2022-02-11 00:27:00,317 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697234534] [2022-02-11 00:27:00,317 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:27:00,317 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-11 00:27:00,317 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:27:00,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-11 00:27:00,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=763, Unknown=0, NotChecked=0, Total=870 [2022-02-11 00:27:00,317 INFO L87 Difference]: Start difference. First operand 456 states and 1286 transitions. Second operand has 30 states, 30 states have (on average 1.4333333333333333) internal successors, (43), 30 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) [2022-02-11 00:27:02,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:27:02,466 INFO L93 Difference]: Finished difference Result 672 states and 1703 transitions. [2022-02-11 00:27:02,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-02-11 00:27:02,466 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.4333333333333333) internal successors, (43), 30 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 18 [2022-02-11 00:27:02,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:27:02,467 INFO L225 Difference]: With dead ends: 672 [2022-02-11 00:27:02,467 INFO L226 Difference]: Without dead ends: 643 [2022-02-11 00:27:02,467 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 955 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=437, Invalid=2985, Unknown=0, NotChecked=0, Total=3422 [2022-02-11 00:27:02,467 INFO L934 BasicCegarLoop]: 17 mSDtfsCounter, 107 mSDsluCounter, 529 mSDsCounter, 0 mSdLazyCounter, 1095 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 322 SdHoareTripleChecker+Invalid, 1157 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 1095 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-11 00:27:02,467 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [107 Valid, 322 Invalid, 1157 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 1095 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-11 00:27:02,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 643 states. [2022-02-11 00:27:02,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 643 to 486. [2022-02-11 00:27:02,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 486 states, 485 states have (on average 2.8515463917525774) internal successors, (1383), 485 states have internal predecessors, (1383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:27:02,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 486 states to 486 states and 1383 transitions. [2022-02-11 00:27:02,473 INFO L78 Accepts]: Start accepts. Automaton has 486 states and 1383 transitions. Word has length 18 [2022-02-11 00:27:02,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:27:02,473 INFO L470 AbstractCegarLoop]: Abstraction has 486 states and 1383 transitions. [2022-02-11 00:27:02,473 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.4333333333333333) internal successors, (43), 30 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) [2022-02-11 00:27:02,473 INFO L276 IsEmpty]: Start isEmpty. Operand 486 states and 1383 transitions. [2022-02-11 00:27:02,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-02-11 00:27:02,474 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:27:02,474 INFO L515 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:27:02,490 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (154)] Ended with exit code 0 [2022-02-11 00:27:02,690 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable161,154 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:27:02,690 INFO L402 AbstractCegarLoop]: === Iteration 163 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:27:02,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:27:02,690 INFO L85 PathProgramCache]: Analyzing trace with hash -983411381, now seen corresponding path program 154 times [2022-02-11 00:27:02,690 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:27:02,690 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [332432459] [2022-02-11 00:27:02,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:27:02,691 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:27:02,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:27:02,964 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:27:02,964 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:27:02,964 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [332432459] [2022-02-11 00:27:02,964 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [332432459] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:27:02,964 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [624326392] [2022-02-11 00:27:02,964 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-11 00:27:02,964 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:27:02,964 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:27:02,965 INFO L229 MonitoredProcess]: Starting monitored process 155 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:27:02,966 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (155)] Waiting until timeout for monitored process [2022-02-11 00:27:03,018 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-11 00:27:03,018 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:27:03,019 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 39 conjunts are in the unsatisfiable core [2022-02-11 00:27:03,019 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:27:03,533 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 61 [2022-02-11 00:27:03,535 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 49 [2022-02-11 00:27:03,635 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:27:03,635 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:27:04,008 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-02-11 00:27:04,009 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 141 treesize of output 114 [2022-02-11 00:27:04,012 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 109 treesize of output 77 [2022-02-11 00:27:04,144 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:27:04,145 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [624326392] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:27:04,145 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:27:04,145 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 30 [2022-02-11 00:27:04,145 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1634670380] [2022-02-11 00:27:04,145 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:27:04,145 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-11 00:27:04,145 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:27:04,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-11 00:27:04,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=780, Unknown=0, NotChecked=0, Total=870 [2022-02-11 00:27:04,145 INFO L87 Difference]: Start difference. First operand 486 states and 1383 transitions. Second operand has 30 states, 30 states have (on average 1.4333333333333333) internal successors, (43), 30 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) [2022-02-11 00:27:05,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:27:05,183 INFO L93 Difference]: Finished difference Result 680 states and 1704 transitions. [2022-02-11 00:27:05,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-02-11 00:27:05,183 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.4333333333333333) internal successors, (43), 30 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 18 [2022-02-11 00:27:05,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:27:05,184 INFO L225 Difference]: With dead ends: 680 [2022-02-11 00:27:05,184 INFO L226 Difference]: Without dead ends: 653 [2022-02-11 00:27:05,184 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 378 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=221, Invalid=1759, Unknown=0, NotChecked=0, Total=1980 [2022-02-11 00:27:05,185 INFO L934 BasicCegarLoop]: 19 mSDtfsCounter, 136 mSDsluCounter, 766 mSDsCounter, 0 mSdLazyCounter, 1109 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 460 SdHoareTripleChecker+Invalid, 1152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 1109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-11 00:27:05,185 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [136 Valid, 460 Invalid, 1152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 1109 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-11 00:27:05,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 653 states. [2022-02-11 00:27:05,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 653 to 493. [2022-02-11 00:27:05,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 493 states, 492 states have (on average 2.8597560975609757) internal successors, (1407), 492 states have internal predecessors, (1407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:27:05,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 493 states to 493 states and 1407 transitions. [2022-02-11 00:27:05,191 INFO L78 Accepts]: Start accepts. Automaton has 493 states and 1407 transitions. Word has length 18 [2022-02-11 00:27:05,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:27:05,191 INFO L470 AbstractCegarLoop]: Abstraction has 493 states and 1407 transitions. [2022-02-11 00:27:05,191 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.4333333333333333) internal successors, (43), 30 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) [2022-02-11 00:27:05,191 INFO L276 IsEmpty]: Start isEmpty. Operand 493 states and 1407 transitions. [2022-02-11 00:27:05,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-02-11 00:27:05,192 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:27:05,192 INFO L515 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:27:05,208 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (155)] Forceful destruction successful, exit code 0 [2022-02-11 00:27:05,392 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162,155 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:27:05,392 INFO L402 AbstractCegarLoop]: === Iteration 164 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:27:05,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:27:05,392 INFO L85 PathProgramCache]: Analyzing trace with hash -949812153, now seen corresponding path program 155 times [2022-02-11 00:27:05,393 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:27:05,393 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [709146674] [2022-02-11 00:27:05,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:27:05,393 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:27:05,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:27:05,641 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:27:05,641 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:27:05,641 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [709146674] [2022-02-11 00:27:05,641 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [709146674] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:27:05,641 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [82185325] [2022-02-11 00:27:05,641 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-11 00:27:05,642 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:27:05,642 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:27:05,642 INFO L229 MonitoredProcess]: Starting monitored process 156 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:27:05,643 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (156)] Waiting until timeout for monitored process [2022-02-11 00:27:05,694 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-11 00:27:05,694 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:27:05,695 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2022-02-11 00:27:05,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:27:06,194 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 87 treesize of output 71 [2022-02-11 00:27:06,197 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 47 [2022-02-11 00:27:06,295 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:27:06,296 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:27:06,983 INFO L353 Elim1Store]: treesize reduction 17, result has 48.5 percent of original size [2022-02-11 00:27:06,984 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 137 treesize of output 108 [2022-02-11 00:27:06,987 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:27:06,987 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:27:06,990 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:27:06,990 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 93 treesize of output 59 [2022-02-11 00:27:07,074 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:27:07,074 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [82185325] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:27:07,074 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:27:07,075 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 30 [2022-02-11 00:27:07,075 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [674698231] [2022-02-11 00:27:07,075 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:27:07,075 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-11 00:27:07,075 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:27:07,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-11 00:27:07,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=771, Unknown=0, NotChecked=0, Total=870 [2022-02-11 00:27:07,075 INFO L87 Difference]: Start difference. First operand 493 states and 1407 transitions. Second operand has 30 states, 30 states have (on average 1.4333333333333333) internal successors, (43), 30 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) [2022-02-11 00:27:09,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:27:09,313 INFO L93 Difference]: Finished difference Result 744 states and 1843 transitions. [2022-02-11 00:27:09,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-02-11 00:27:09,313 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.4333333333333333) internal successors, (43), 30 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 18 [2022-02-11 00:27:09,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:27:09,314 INFO L225 Difference]: With dead ends: 744 [2022-02-11 00:27:09,314 INFO L226 Difference]: Without dead ends: 705 [2022-02-11 00:27:09,314 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 796 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=365, Invalid=2605, Unknown=0, NotChecked=0, Total=2970 [2022-02-11 00:27:09,315 INFO L934 BasicCegarLoop]: 12 mSDtfsCounter, 183 mSDsluCounter, 711 mSDsCounter, 0 mSdLazyCounter, 1265 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 183 SdHoareTripleChecker+Valid, 426 SdHoareTripleChecker+Invalid, 1336 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 1265 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-11 00:27:09,315 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [183 Valid, 426 Invalid, 1336 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 1265 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-11 00:27:09,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 705 states. [2022-02-11 00:27:09,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 705 to 503. [2022-02-11 00:27:09,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 503 states, 502 states have (on average 2.8725099601593627) internal successors, (1442), 502 states have internal predecessors, (1442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:27:09,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 503 states to 503 states and 1442 transitions. [2022-02-11 00:27:09,321 INFO L78 Accepts]: Start accepts. Automaton has 503 states and 1442 transitions. Word has length 18 [2022-02-11 00:27:09,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:27:09,321 INFO L470 AbstractCegarLoop]: Abstraction has 503 states and 1442 transitions. [2022-02-11 00:27:09,321 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.4333333333333333) internal successors, (43), 30 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) [2022-02-11 00:27:09,321 INFO L276 IsEmpty]: Start isEmpty. Operand 503 states and 1442 transitions. [2022-02-11 00:27:09,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-02-11 00:27:09,322 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:27:09,322 INFO L515 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:27:09,338 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (156)] Ended with exit code 0 [2022-02-11 00:27:09,522 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163,156 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:27:09,522 INFO L402 AbstractCegarLoop]: === Iteration 165 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:27:09,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:27:09,523 INFO L85 PathProgramCache]: Analyzing trace with hash 1129481675, now seen corresponding path program 156 times [2022-02-11 00:27:09,523 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:27:09,523 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1954854848] [2022-02-11 00:27:09,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:27:09,523 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:27:09,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:27:09,707 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:27:09,707 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:27:09,707 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1954854848] [2022-02-11 00:27:09,707 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1954854848] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:27:09,707 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [494567922] [2022-02-11 00:27:09,707 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-11 00:27:09,707 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:27:09,707 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:27:09,708 INFO L229 MonitoredProcess]: Starting monitored process 157 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:27:09,709 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (157)] Waiting until timeout for monitored process [2022-02-11 00:27:09,759 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-11 00:27:09,759 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:27:09,760 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2022-02-11 00:27:09,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:27:10,109 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 99 treesize of output 83 [2022-02-11 00:27:10,111 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 83 treesize of output 67 [2022-02-11 00:27:10,408 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:27:10,408 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:27:10,863 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-02-11 00:27:10,863 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 124 treesize of output 105 [2022-02-11 00:27:10,866 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 100 treesize of output 76 [2022-02-11 00:27:10,997 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:27:10,997 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [494567922] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:27:10,997 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:27:10,997 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 30 [2022-02-11 00:27:10,997 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1942805860] [2022-02-11 00:27:10,997 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:27:10,997 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-11 00:27:10,997 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:27:10,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-11 00:27:10,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=764, Unknown=0, NotChecked=0, Total=870 [2022-02-11 00:27:10,998 INFO L87 Difference]: Start difference. First operand 503 states and 1442 transitions. Second operand has 30 states, 30 states have (on average 1.4333333333333333) internal successors, (43), 30 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) [2022-02-11 00:27:14,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:27:14,436 INFO L93 Difference]: Finished difference Result 872 states and 2067 transitions. [2022-02-11 00:27:14,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-02-11 00:27:14,436 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.4333333333333333) internal successors, (43), 30 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 18 [2022-02-11 00:27:14,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:27:14,437 INFO L225 Difference]: With dead ends: 872 [2022-02-11 00:27:14,437 INFO L226 Difference]: Without dead ends: 811 [2022-02-11 00:27:14,438 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1047 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=518, Invalid=3264, Unknown=0, NotChecked=0, Total=3782 [2022-02-11 00:27:14,438 INFO L934 BasicCegarLoop]: 13 mSDtfsCounter, 210 mSDsluCounter, 543 mSDsCounter, 0 mSdLazyCounter, 937 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 210 SdHoareTripleChecker+Valid, 338 SdHoareTripleChecker+Invalid, 1042 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 937 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-11 00:27:14,438 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [210 Valid, 338 Invalid, 1042 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 937 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-11 00:27:14,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 811 states. [2022-02-11 00:27:14,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 811 to 511. [2022-02-11 00:27:14,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 511 states, 510 states have (on average 2.876470588235294) internal successors, (1467), 510 states have internal predecessors, (1467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:27:14,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 511 states to 511 states and 1467 transitions. [2022-02-11 00:27:14,445 INFO L78 Accepts]: Start accepts. Automaton has 511 states and 1467 transitions. Word has length 18 [2022-02-11 00:27:14,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:27:14,445 INFO L470 AbstractCegarLoop]: Abstraction has 511 states and 1467 transitions. [2022-02-11 00:27:14,445 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.4333333333333333) internal successors, (43), 30 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) [2022-02-11 00:27:14,445 INFO L276 IsEmpty]: Start isEmpty. Operand 511 states and 1467 transitions. [2022-02-11 00:27:14,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-02-11 00:27:14,445 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:27:14,446 INFO L515 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:27:14,462 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (157)] Forceful destruction successful, exit code 0 [2022-02-11 00:27:14,646 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164,157 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:27:14,646 INFO L402 AbstractCegarLoop]: === Iteration 166 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:27:14,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:27:14,646 INFO L85 PathProgramCache]: Analyzing trace with hash 2030740751, now seen corresponding path program 157 times [2022-02-11 00:27:14,646 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:27:14,646 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1184207858] [2022-02-11 00:27:14,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:27:14,647 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:27:14,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:27:14,871 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:27:14,871 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:27:14,871 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1184207858] [2022-02-11 00:27:14,871 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1184207858] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:27:14,871 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [198166355] [2022-02-11 00:27:14,871 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-11 00:27:14,871 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:27:14,872 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:27:14,872 INFO L229 MonitoredProcess]: Starting monitored process 158 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:27:14,873 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (158)] Waiting until timeout for monitored process [2022-02-11 00:27:14,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:27:14,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2022-02-11 00:27:14,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:27:15,306 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 104 treesize of output 88 [2022-02-11 00:27:15,308 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 88 treesize of output 72 [2022-02-11 00:27:15,614 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:27:15,615 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:27:16,023 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-02-11 00:27:16,024 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 121 treesize of output 102 [2022-02-11 00:27:16,027 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 97 treesize of output 73 [2022-02-11 00:27:16,166 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:27:16,166 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [198166355] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:27:16,166 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:27:16,166 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 11] total 28 [2022-02-11 00:27:16,166 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2094812001] [2022-02-11 00:27:16,166 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:27:16,166 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-02-11 00:27:16,166 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:27:16,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-02-11 00:27:16,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=663, Unknown=0, NotChecked=0, Total=756 [2022-02-11 00:27:16,167 INFO L87 Difference]: Start difference. First operand 511 states and 1467 transitions. Second operand has 28 states, 28 states have (on average 1.4642857142857142) internal successors, (41), 28 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) [2022-02-11 00:27:19,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:27:19,126 INFO L93 Difference]: Finished difference Result 754 states and 1864 transitions. [2022-02-11 00:27:19,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-02-11 00:27:19,126 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.4642857142857142) internal successors, (41), 28 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 18 [2022-02-11 00:27:19,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:27:19,127 INFO L225 Difference]: With dead ends: 754 [2022-02-11 00:27:19,127 INFO L226 Difference]: Without dead ends: 684 [2022-02-11 00:27:19,128 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1178 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=608, Invalid=3552, Unknown=0, NotChecked=0, Total=4160 [2022-02-11 00:27:19,128 INFO L934 BasicCegarLoop]: 12 mSDtfsCounter, 246 mSDsluCounter, 571 mSDsCounter, 0 mSdLazyCounter, 1157 mSolverCounterSat, 137 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 246 SdHoareTripleChecker+Valid, 356 SdHoareTripleChecker+Invalid, 1294 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 137 IncrementalHoareTripleChecker+Valid, 1157 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-11 00:27:19,128 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [246 Valid, 356 Invalid, 1294 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [137 Valid, 1157 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-11 00:27:19,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 684 states. [2022-02-11 00:27:19,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 684 to 517. [2022-02-11 00:27:19,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 517 states, 516 states have (on average 2.877906976744186) internal successors, (1485), 516 states have internal predecessors, (1485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:27:19,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 517 states to 517 states and 1485 transitions. [2022-02-11 00:27:19,134 INFO L78 Accepts]: Start accepts. Automaton has 517 states and 1485 transitions. Word has length 18 [2022-02-11 00:27:19,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:27:19,134 INFO L470 AbstractCegarLoop]: Abstraction has 517 states and 1485 transitions. [2022-02-11 00:27:19,135 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.4642857142857142) internal successors, (41), 28 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) [2022-02-11 00:27:19,135 INFO L276 IsEmpty]: Start isEmpty. Operand 517 states and 1485 transitions. [2022-02-11 00:27:19,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-02-11 00:27:19,135 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:27:19,135 INFO L515 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:27:19,151 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (158)] Ended with exit code 0 [2022-02-11 00:27:19,337 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 158 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable165 [2022-02-11 00:27:19,337 INFO L402 AbstractCegarLoop]: === Iteration 167 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:27:19,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:27:19,337 INFO L85 PathProgramCache]: Analyzing trace with hash 1973267539, now seen corresponding path program 158 times [2022-02-11 00:27:19,337 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:27:19,337 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [629597336] [2022-02-11 00:27:19,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:27:19,338 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:27:19,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:27:19,516 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:27:19,516 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:27:19,517 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [629597336] [2022-02-11 00:27:19,517 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [629597336] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:27:19,517 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [951516624] [2022-02-11 00:27:19,517 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-11 00:27:19,517 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:27:19,517 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:27:19,518 INFO L229 MonitoredProcess]: Starting monitored process 159 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:27:19,518 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (159)] Waiting until timeout for monitored process [2022-02-11 00:27:19,568 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-11 00:27:19,569 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:27:19,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2022-02-11 00:27:19,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:27:19,869 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 101 treesize of output 85 [2022-02-11 00:27:19,872 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 85 treesize of output 69 [2022-02-11 00:27:20,130 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:27:20,130 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:27:20,498 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-11 00:27:20,498 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 105 treesize of output 92 [2022-02-11 00:27:20,501 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 73 [2022-02-11 00:27:20,641 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:27:20,642 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [951516624] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:27:20,642 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:27:20,642 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 10] total 27 [2022-02-11 00:27:20,642 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348128842] [2022-02-11 00:27:20,642 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:27:20,642 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-11 00:27:20,642 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:27:20,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-11 00:27:20,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=610, Unknown=0, NotChecked=0, Total=702 [2022-02-11 00:27:20,642 INFO L87 Difference]: Start difference. First operand 517 states and 1485 transitions. Second operand has 27 states, 27 states have (on average 1.5555555555555556) internal successors, (42), 27 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:27:21,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:27:21,824 INFO L93 Difference]: Finished difference Result 725 states and 1838 transitions. [2022-02-11 00:27:21,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-02-11 00:27:21,824 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.5555555555555556) internal successors, (42), 27 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-02-11 00:27:21,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:27:21,825 INFO L225 Difference]: With dead ends: 725 [2022-02-11 00:27:21,825 INFO L226 Difference]: Without dead ends: 682 [2022-02-11 00:27:21,826 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 353 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=268, Invalid=1292, Unknown=0, NotChecked=0, Total=1560 [2022-02-11 00:27:21,826 INFO L934 BasicCegarLoop]: 17 mSDtfsCounter, 189 mSDsluCounter, 655 mSDsCounter, 0 mSdLazyCounter, 1105 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 189 SdHoareTripleChecker+Valid, 411 SdHoareTripleChecker+Invalid, 1191 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 1105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-11 00:27:21,826 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [189 Valid, 411 Invalid, 1191 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 1105 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-11 00:27:21,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 682 states. [2022-02-11 00:27:21,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 682 to 517. [2022-02-11 00:27:21,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 517 states, 516 states have (on average 2.877906976744186) internal successors, (1485), 516 states have internal predecessors, (1485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:27:21,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 517 states to 517 states and 1485 transitions. [2022-02-11 00:27:21,832 INFO L78 Accepts]: Start accepts. Automaton has 517 states and 1485 transitions. Word has length 18 [2022-02-11 00:27:21,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:27:21,832 INFO L470 AbstractCegarLoop]: Abstraction has 517 states and 1485 transitions. [2022-02-11 00:27:21,832 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.5555555555555556) internal successors, (42), 27 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:27:21,833 INFO L276 IsEmpty]: Start isEmpty. Operand 517 states and 1485 transitions. [2022-02-11 00:27:21,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-02-11 00:27:21,833 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:27:21,833 INFO L515 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:27:21,849 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (159)] Forceful destruction successful, exit code 0 [2022-02-11 00:27:22,033 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable166,159 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:27:22,034 INFO L402 AbstractCegarLoop]: === Iteration 168 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:27:22,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:27:22,034 INFO L85 PathProgramCache]: Analyzing trace with hash -616296057, now seen corresponding path program 159 times [2022-02-11 00:27:22,034 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:27:22,034 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1491179437] [2022-02-11 00:27:22,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:27:22,034 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:27:22,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:27:22,214 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:27:22,214 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:27:22,214 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1491179437] [2022-02-11 00:27:22,214 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1491179437] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:27:22,214 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1767612427] [2022-02-11 00:27:22,214 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-11 00:27:22,214 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:27:22,214 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:27:22,215 INFO L229 MonitoredProcess]: Starting monitored process 160 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:27:22,215 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (160)] Waiting until timeout for monitored process [2022-02-11 00:27:22,266 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-02-11 00:27:22,266 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:27:22,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 42 conjunts are in the unsatisfiable core [2022-02-11 00:27:22,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:27:22,574 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 99 treesize of output 83 [2022-02-11 00:27:22,576 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 83 treesize of output 67 [2022-02-11 00:27:22,821 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:27:22,821 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:27:23,114 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-11 00:27:23,115 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 108 treesize of output 95 [2022-02-11 00:27:23,118 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 92 treesize of output 76 [2022-02-11 00:27:23,233 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-11 00:27:23,233 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1767612427] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:27:23,233 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:27:23,233 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 9] total 26 [2022-02-11 00:27:23,233 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359050820] [2022-02-11 00:27:23,233 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:27:23,233 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-11 00:27:23,233 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:27:23,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-11 00:27:23,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=560, Unknown=0, NotChecked=0, Total=650 [2022-02-11 00:27:23,234 INFO L87 Difference]: Start difference. First operand 517 states and 1485 transitions. Second operand has 26 states, 26 states have (on average 1.5) internal successors, (39), 26 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) [2022-02-11 00:27:23,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:27:23,943 INFO L93 Difference]: Finished difference Result 638 states and 1688 transitions. [2022-02-11 00:27:23,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-02-11 00:27:23,943 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.5) internal successors, (39), 26 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 18 [2022-02-11 00:27:23,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:27:23,944 INFO L225 Difference]: With dead ends: 638 [2022-02-11 00:27:23,944 INFO L226 Difference]: Without dead ends: 615 [2022-02-11 00:27:23,944 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 269 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=164, Invalid=958, Unknown=0, NotChecked=0, Total=1122 [2022-02-11 00:27:23,944 INFO L934 BasicCegarLoop]: 16 mSDtfsCounter, 102 mSDsluCounter, 418 mSDsCounter, 0 mSdLazyCounter, 784 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 252 SdHoareTripleChecker+Invalid, 835 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 784 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-11 00:27:23,944 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [102 Valid, 252 Invalid, 835 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 784 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-11 00:27:23,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 615 states. [2022-02-11 00:27:23,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 615 to 517. [2022-02-11 00:27:23,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 517 states, 516 states have (on average 2.877906976744186) internal successors, (1485), 516 states have internal predecessors, (1485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:27:23,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 517 states to 517 states and 1485 transitions. [2022-02-11 00:27:23,950 INFO L78 Accepts]: Start accepts. Automaton has 517 states and 1485 transitions. Word has length 18 [2022-02-11 00:27:23,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:27:23,950 INFO L470 AbstractCegarLoop]: Abstraction has 517 states and 1485 transitions. [2022-02-11 00:27:23,951 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.5) internal successors, (39), 26 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) [2022-02-11 00:27:23,951 INFO L276 IsEmpty]: Start isEmpty. Operand 517 states and 1485 transitions. [2022-02-11 00:27:23,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-02-11 00:27:23,951 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:27:23,951 INFO L515 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:27:23,967 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (160)] Ended with exit code 0 [2022-02-11 00:27:24,151 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable167,160 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:27:24,152 INFO L402 AbstractCegarLoop]: === Iteration 169 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:27:24,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:27:24,152 INFO L85 PathProgramCache]: Analyzing trace with hash 323544135, now seen corresponding path program 160 times [2022-02-11 00:27:24,152 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:27:24,152 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [811840633] [2022-02-11 00:27:24,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:27:24,152 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:27:24,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:27:24,460 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:27:24,460 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:27:24,460 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [811840633] [2022-02-11 00:27:24,460 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [811840633] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:27:24,460 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [819965142] [2022-02-11 00:27:24,460 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-11 00:27:24,460 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:27:24,460 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:27:24,461 INFO L229 MonitoredProcess]: Starting monitored process 161 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:27:24,462 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (161)] Waiting until timeout for monitored process [2022-02-11 00:27:24,514 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-11 00:27:24,514 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:27:24,515 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2022-02-11 00:27:24,516 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:27:24,903 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 59 [2022-02-11 00:27:24,905 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 47 [2022-02-11 00:27:25,027 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:27:25,027 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:27:25,384 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-11 00:27:25,384 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 122 treesize of output 105 [2022-02-11 00:27:25,387 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 102 treesize of output 82 [2022-02-11 00:27:25,521 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:27:25,522 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [819965142] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:27:25,522 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:27:25,522 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 10] total 27 [2022-02-11 00:27:25,522 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109994014] [2022-02-11 00:27:25,522 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:27:25,522 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-11 00:27:25,522 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:27:25,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-11 00:27:25,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=608, Unknown=0, NotChecked=0, Total=702 [2022-02-11 00:27:25,522 INFO L87 Difference]: Start difference. First operand 517 states and 1485 transitions. Second operand has 27 states, 27 states have (on average 1.5555555555555556) internal successors, (42), 27 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:27:26,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:27:26,784 INFO L93 Difference]: Finished difference Result 702 states and 1827 transitions. [2022-02-11 00:27:26,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-02-11 00:27:26,784 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.5555555555555556) internal successors, (42), 27 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-02-11 00:27:26,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:27:26,785 INFO L225 Difference]: With dead ends: 702 [2022-02-11 00:27:26,785 INFO L226 Difference]: Without dead ends: 670 [2022-02-11 00:27:26,785 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 475 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=363, Invalid=1893, Unknown=0, NotChecked=0, Total=2256 [2022-02-11 00:27:26,786 INFO L934 BasicCegarLoop]: 17 mSDtfsCounter, 207 mSDsluCounter, 452 mSDsCounter, 0 mSdLazyCounter, 768 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 207 SdHoareTripleChecker+Valid, 277 SdHoareTripleChecker+Invalid, 844 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 768 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-11 00:27:26,786 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [207 Valid, 277 Invalid, 844 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 768 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-11 00:27:26,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 670 states. [2022-02-11 00:27:26,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 670 to 535. [2022-02-11 00:27:26,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 535 states, 534 states have (on average 2.8876404494382024) internal successors, (1542), 534 states have internal predecessors, (1542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:27:26,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 535 states to 535 states and 1542 transitions. [2022-02-11 00:27:26,792 INFO L78 Accepts]: Start accepts. Automaton has 535 states and 1542 transitions. Word has length 18 [2022-02-11 00:27:26,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:27:26,792 INFO L470 AbstractCegarLoop]: Abstraction has 535 states and 1542 transitions. [2022-02-11 00:27:26,792 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.5555555555555556) internal successors, (42), 27 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:27:26,792 INFO L276 IsEmpty]: Start isEmpty. Operand 535 states and 1542 transitions. [2022-02-11 00:27:26,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-02-11 00:27:26,793 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:27:26,793 INFO L515 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:27:26,809 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (161)] Ended with exit code 0 [2022-02-11 00:27:26,993 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 161 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable168 [2022-02-11 00:27:26,993 INFO L402 AbstractCegarLoop]: === Iteration 170 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:27:26,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:27:26,994 INFO L85 PathProgramCache]: Analyzing trace with hash -1892129333, now seen corresponding path program 161 times [2022-02-11 00:27:26,994 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:27:26,994 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [942011680] [2022-02-11 00:27:26,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:27:26,994 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:27:26,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:27:27,181 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:27:27,181 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:27:27,181 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [942011680] [2022-02-11 00:27:27,181 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [942011680] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:27:27,181 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [388402664] [2022-02-11 00:27:27,181 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-11 00:27:27,181 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:27:27,181 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:27:27,182 INFO L229 MonitoredProcess]: Starting monitored process 162 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:27:27,183 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (162)] Waiting until timeout for monitored process [2022-02-11 00:27:27,238 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-02-11 00:27:27,239 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:27:27,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 39 conjunts are in the unsatisfiable core [2022-02-11 00:27:27,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:27:27,583 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 104 treesize of output 88 [2022-02-11 00:27:27,585 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 88 treesize of output 72 [2022-02-11 00:27:27,811 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:27:27,812 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:27:28,064 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-11 00:27:28,065 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 105 treesize of output 92 [2022-02-11 00:27:28,068 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 73 [2022-02-11 00:27:28,197 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:27:28,197 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [388402664] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:27:28,197 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:27:28,197 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 10] total 27 [2022-02-11 00:27:28,197 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1325177163] [2022-02-11 00:27:28,197 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:27:28,197 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-11 00:27:28,198 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:27:28,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-11 00:27:28,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=612, Unknown=0, NotChecked=0, Total=702 [2022-02-11 00:27:28,198 INFO L87 Difference]: Start difference. First operand 535 states and 1542 transitions. Second operand has 27 states, 27 states have (on average 1.5555555555555556) internal successors, (42), 27 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:27:29,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:27:29,887 INFO L93 Difference]: Finished difference Result 743 states and 1871 transitions. [2022-02-11 00:27:29,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-02-11 00:27:29,887 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.5555555555555556) internal successors, (42), 27 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-02-11 00:27:29,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:27:29,888 INFO L225 Difference]: With dead ends: 743 [2022-02-11 00:27:29,888 INFO L226 Difference]: Without dead ends: 696 [2022-02-11 00:27:29,889 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 618 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=371, Invalid=2179, Unknown=0, NotChecked=0, Total=2550 [2022-02-11 00:27:29,889 INFO L934 BasicCegarLoop]: 20 mSDtfsCounter, 191 mSDsluCounter, 679 mSDsCounter, 0 mSdLazyCounter, 1156 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 191 SdHoareTripleChecker+Valid, 429 SdHoareTripleChecker+Invalid, 1226 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 1156 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-11 00:27:29,889 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [191 Valid, 429 Invalid, 1226 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 1156 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-11 00:27:29,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 696 states. [2022-02-11 00:27:29,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 696 to 535. [2022-02-11 00:27:29,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 535 states, 534 states have (on average 2.8838951310861423) internal successors, (1540), 534 states have internal predecessors, (1540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:27:29,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 535 states to 535 states and 1540 transitions. [2022-02-11 00:27:29,895 INFO L78 Accepts]: Start accepts. Automaton has 535 states and 1540 transitions. Word has length 18 [2022-02-11 00:27:29,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:27:29,896 INFO L470 AbstractCegarLoop]: Abstraction has 535 states and 1540 transitions. [2022-02-11 00:27:29,896 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.5555555555555556) internal successors, (42), 27 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:27:29,896 INFO L276 IsEmpty]: Start isEmpty. Operand 535 states and 1540 transitions. [2022-02-11 00:27:29,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-02-11 00:27:29,896 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:27:29,896 INFO L515 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:27:29,912 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (162)] Forceful destruction successful, exit code 0 [2022-02-11 00:27:30,097 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 162 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable169 [2022-02-11 00:27:30,097 INFO L402 AbstractCegarLoop]: === Iteration 171 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:27:30,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:27:30,097 INFO L85 PathProgramCache]: Analyzing trace with hash 254041427, now seen corresponding path program 162 times [2022-02-11 00:27:30,097 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:27:30,097 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1579323678] [2022-02-11 00:27:30,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:27:30,097 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:27:30,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:27:30,271 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:27:30,272 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:27:30,272 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1579323678] [2022-02-11 00:27:30,272 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1579323678] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:27:30,272 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [419379158] [2022-02-11 00:27:30,272 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-11 00:27:30,272 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:27:30,272 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:27:30,273 INFO L229 MonitoredProcess]: Starting monitored process 163 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:27:30,273 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (163)] Waiting until timeout for monitored process [2022-02-11 00:27:30,325 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-11 00:27:30,325 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:27:30,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2022-02-11 00:27:30,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:27:30,643 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 101 treesize of output 85 [2022-02-11 00:27:30,645 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 85 treesize of output 69 [2022-02-11 00:27:30,876 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:27:30,877 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:27:31,221 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-11 00:27:31,222 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 103 treesize of output 90 [2022-02-11 00:27:31,225 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 87 treesize of output 71 [2022-02-11 00:27:31,369 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:27:31,369 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [419379158] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:27:31,369 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:27:31,369 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 10] total 27 [2022-02-11 00:27:31,369 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [93460494] [2022-02-11 00:27:31,369 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:27:31,369 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-11 00:27:31,369 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:27:31,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-11 00:27:31,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=613, Unknown=0, NotChecked=0, Total=702 [2022-02-11 00:27:31,370 INFO L87 Difference]: Start difference. First operand 535 states and 1540 transitions. Second operand has 27 states, 27 states have (on average 1.5555555555555556) internal successors, (42), 27 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:27:33,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:27:33,386 INFO L93 Difference]: Finished difference Result 757 states and 1905 transitions. [2022-02-11 00:27:33,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-02-11 00:27:33,386 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.5555555555555556) internal successors, (42), 27 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-02-11 00:27:33,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:27:33,387 INFO L225 Difference]: With dead ends: 757 [2022-02-11 00:27:33,387 INFO L226 Difference]: Without dead ends: 707 [2022-02-11 00:27:33,387 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 701 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=449, Invalid=2413, Unknown=0, NotChecked=0, Total=2862 [2022-02-11 00:27:33,387 INFO L934 BasicCegarLoop]: 19 mSDtfsCounter, 180 mSDsluCounter, 561 mSDsCounter, 0 mSdLazyCounter, 1011 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 180 SdHoareTripleChecker+Valid, 360 SdHoareTripleChecker+Invalid, 1111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 1011 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-11 00:27:33,387 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [180 Valid, 360 Invalid, 1111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 1011 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-11 00:27:33,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 707 states. [2022-02-11 00:27:33,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 707 to 532. [2022-02-11 00:27:33,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 532 states, 531 states have (on average 2.8700564971751414) internal successors, (1524), 531 states have internal predecessors, (1524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:27:33,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 532 states to 532 states and 1524 transitions. [2022-02-11 00:27:33,394 INFO L78 Accepts]: Start accepts. Automaton has 532 states and 1524 transitions. Word has length 18 [2022-02-11 00:27:33,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:27:33,394 INFO L470 AbstractCegarLoop]: Abstraction has 532 states and 1524 transitions. [2022-02-11 00:27:33,394 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.5555555555555556) internal successors, (42), 27 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:27:33,394 INFO L276 IsEmpty]: Start isEmpty. Operand 532 states and 1524 transitions. [2022-02-11 00:27:33,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-02-11 00:27:33,395 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:27:33,395 INFO L515 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:27:33,411 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (163)] Forceful destruction successful, exit code 0 [2022-02-11 00:27:33,595 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 163 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable170 [2022-02-11 00:27:33,595 INFO L402 AbstractCegarLoop]: === Iteration 172 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:27:33,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:27:33,596 INFO L85 PathProgramCache]: Analyzing trace with hash -1934141749, now seen corresponding path program 163 times [2022-02-11 00:27:33,596 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:27:33,596 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1190237520] [2022-02-11 00:27:33,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:27:33,596 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:27:33,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:27:33,795 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:27:33,796 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:27:33,796 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1190237520] [2022-02-11 00:27:33,796 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1190237520] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:27:33,796 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [502826535] [2022-02-11 00:27:33,796 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-11 00:27:33,796 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:27:33,796 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:27:33,797 INFO L229 MonitoredProcess]: Starting monitored process 164 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:27:33,797 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (164)] Waiting until timeout for monitored process [2022-02-11 00:27:33,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:27:33,851 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2022-02-11 00:27:33,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:27:34,262 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 109 treesize of output 89 [2022-02-11 00:27:34,264 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 77 treesize of output 61 [2022-02-11 00:27:34,498 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:27:34,498 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:27:35,142 INFO L353 Elim1Store]: treesize reduction 17, result has 48.5 percent of original size [2022-02-11 00:27:35,143 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 114 treesize of output 93 [2022-02-11 00:27:35,145 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:27:35,146 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:27:35,149 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:27:35,149 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 78 treesize of output 52 [2022-02-11 00:27:35,271 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:27:35,271 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [502826535] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:27:35,271 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:27:35,271 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 30 [2022-02-11 00:27:35,271 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [781226283] [2022-02-11 00:27:35,271 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:27:35,272 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-11 00:27:35,272 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:27:35,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-11 00:27:35,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=772, Unknown=0, NotChecked=0, Total=870 [2022-02-11 00:27:35,272 INFO L87 Difference]: Start difference. First operand 532 states and 1524 transitions. Second operand has 30 states, 30 states have (on average 1.4333333333333333) internal successors, (43), 30 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) [2022-02-11 00:27:37,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:27:37,973 INFO L93 Difference]: Finished difference Result 768 states and 1950 transitions. [2022-02-11 00:27:37,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-02-11 00:27:37,974 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.4333333333333333) internal successors, (43), 30 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 18 [2022-02-11 00:27:37,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:27:37,975 INFO L225 Difference]: With dead ends: 768 [2022-02-11 00:27:37,975 INFO L226 Difference]: Without dead ends: 736 [2022-02-11 00:27:37,975 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 604 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=414, Invalid=2666, Unknown=0, NotChecked=0, Total=3080 [2022-02-11 00:27:37,975 INFO L934 BasicCegarLoop]: 18 mSDtfsCounter, 220 mSDsluCounter, 728 mSDsCounter, 0 mSdLazyCounter, 1312 mSolverCounterSat, 122 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 220 SdHoareTripleChecker+Valid, 444 SdHoareTripleChecker+Invalid, 1434 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 122 IncrementalHoareTripleChecker+Valid, 1312 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-11 00:27:37,975 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [220 Valid, 444 Invalid, 1434 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [122 Valid, 1312 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-11 00:27:37,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 736 states. [2022-02-11 00:27:37,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 736 to 539. [2022-02-11 00:27:37,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 539 states, 538 states have (on average 2.866171003717472) internal successors, (1542), 538 states have internal predecessors, (1542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:27:37,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 539 states to 539 states and 1542 transitions. [2022-02-11 00:27:37,986 INFO L78 Accepts]: Start accepts. Automaton has 539 states and 1542 transitions. Word has length 18 [2022-02-11 00:27:37,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:27:37,986 INFO L470 AbstractCegarLoop]: Abstraction has 539 states and 1542 transitions. [2022-02-11 00:27:37,986 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.4333333333333333) internal successors, (43), 30 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) [2022-02-11 00:27:37,986 INFO L276 IsEmpty]: Start isEmpty. Operand 539 states and 1542 transitions. [2022-02-11 00:27:37,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-02-11 00:27:37,986 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:27:37,986 INFO L515 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:27:38,002 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (164)] Ended with exit code 0 [2022-02-11 00:27:38,187 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable171,164 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:27:38,187 INFO L402 AbstractCegarLoop]: === Iteration 173 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:27:38,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:27:38,187 INFO L85 PathProgramCache]: Analyzing trace with hash -1854015021, now seen corresponding path program 164 times [2022-02-11 00:27:38,187 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:27:38,187 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [316914649] [2022-02-11 00:27:38,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:27:38,188 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:27:38,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:27:38,472 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:27:38,472 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:27:38,472 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [316914649] [2022-02-11 00:27:38,472 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [316914649] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:27:38,472 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1235740074] [2022-02-11 00:27:38,472 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-11 00:27:38,472 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:27:38,473 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:27:38,473 INFO L229 MonitoredProcess]: Starting monitored process 165 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:27:38,474 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (165)] Waiting until timeout for monitored process [2022-02-11 00:27:38,522 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-11 00:27:38,523 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:27:38,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2022-02-11 00:27:38,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:27:38,977 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 57 [2022-02-11 00:27:38,979 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 45 [2022-02-11 00:27:39,087 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:27:39,088 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:27:39,462 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-02-11 00:27:39,462 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 144 treesize of output 117 [2022-02-11 00:27:39,465 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 112 treesize of output 80 [2022-02-11 00:27:39,604 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:27:39,604 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1235740074] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:27:39,604 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:27:39,604 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 11] total 28 [2022-02-11 00:27:39,604 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1944713617] [2022-02-11 00:27:39,604 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:27:39,604 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-02-11 00:27:39,605 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:27:39,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-02-11 00:27:39,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=662, Unknown=0, NotChecked=0, Total=756 [2022-02-11 00:27:39,605 INFO L87 Difference]: Start difference. First operand 539 states and 1542 transitions. Second operand has 28 states, 28 states have (on average 1.5) internal successors, (42), 28 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:27:40,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:27:40,527 INFO L93 Difference]: Finished difference Result 698 states and 1841 transitions. [2022-02-11 00:27:40,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-02-11 00:27:40,527 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.5) internal successors, (42), 28 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-02-11 00:27:40,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:27:40,528 INFO L225 Difference]: With dead ends: 698 [2022-02-11 00:27:40,529 INFO L226 Difference]: Without dead ends: 678 [2022-02-11 00:27:40,529 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 283 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=208, Invalid=1352, Unknown=0, NotChecked=0, Total=1560 [2022-02-11 00:27:40,529 INFO L934 BasicCegarLoop]: 26 mSDtfsCounter, 111 mSDsluCounter, 618 mSDsCounter, 0 mSdLazyCounter, 1020 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 378 SdHoareTripleChecker+Invalid, 1064 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 1020 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-11 00:27:40,529 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 378 Invalid, 1064 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 1020 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-11 00:27:40,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 678 states. [2022-02-11 00:27:40,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 678 to 551. [2022-02-11 00:27:40,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 551 states, 550 states have (on average 2.8854545454545453) internal successors, (1587), 550 states have internal predecessors, (1587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:27:40,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 551 states to 551 states and 1587 transitions. [2022-02-11 00:27:40,539 INFO L78 Accepts]: Start accepts. Automaton has 551 states and 1587 transitions. Word has length 18 [2022-02-11 00:27:40,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:27:40,539 INFO L470 AbstractCegarLoop]: Abstraction has 551 states and 1587 transitions. [2022-02-11 00:27:40,539 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.5) internal successors, (42), 28 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:27:40,539 INFO L276 IsEmpty]: Start isEmpty. Operand 551 states and 1587 transitions. [2022-02-11 00:27:40,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-02-11 00:27:40,540 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:27:40,540 INFO L515 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:27:40,556 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (165)] Forceful destruction successful, exit code 0 [2022-02-11 00:27:40,740 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 165 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable172 [2022-02-11 00:27:40,741 INFO L402 AbstractCegarLoop]: === Iteration 174 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:27:40,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:27:40,741 INFO L85 PathProgramCache]: Analyzing trace with hash -1820415793, now seen corresponding path program 165 times [2022-02-11 00:27:40,741 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:27:40,741 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [37025529] [2022-02-11 00:27:40,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:27:40,741 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:27:40,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:27:41,051 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:27:41,052 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:27:41,052 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [37025529] [2022-02-11 00:27:41,052 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [37025529] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:27:41,052 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [478891684] [2022-02-11 00:27:41,052 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-11 00:27:41,052 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:27:41,052 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:27:41,053 INFO L229 MonitoredProcess]: Starting monitored process 166 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:27:41,053 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (166)] Waiting until timeout for monitored process [2022-02-11 00:27:41,107 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-02-11 00:27:41,107 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:27:41,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 45 conjunts are in the unsatisfiable core [2022-02-11 00:27:41,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:27:41,658 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 87 treesize of output 71 [2022-02-11 00:27:41,660 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 47 [2022-02-11 00:27:41,770 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:27:41,770 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:27:42,353 INFO L353 Elim1Store]: treesize reduction 19, result has 42.4 percent of original size [2022-02-11 00:27:42,353 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 149 treesize of output 118 [2022-02-11 00:27:42,356 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:27:42,356 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:27:42,360 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:27:42,360 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 105 treesize of output 71 [2022-02-11 00:27:42,526 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:27:42,527 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [478891684] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:27:42,527 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:27:42,527 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 30 [2022-02-11 00:27:42,527 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [553977410] [2022-02-11 00:27:42,527 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:27:42,527 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-11 00:27:42,527 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:27:42,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-11 00:27:42,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=751, Unknown=0, NotChecked=0, Total=870 [2022-02-11 00:27:42,527 INFO L87 Difference]: Start difference. First operand 551 states and 1587 transitions. Second operand has 30 states, 30 states have (on average 1.4333333333333333) internal successors, (43), 30 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) [2022-02-11 00:27:46,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:27:46,756 INFO L93 Difference]: Finished difference Result 887 states and 2164 transitions. [2022-02-11 00:27:46,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-02-11 00:27:46,757 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.4333333333333333) internal successors, (43), 30 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 18 [2022-02-11 00:27:46,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:27:46,758 INFO L225 Difference]: With dead ends: 887 [2022-02-11 00:27:46,758 INFO L226 Difference]: Without dead ends: 848 [2022-02-11 00:27:46,758 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1316 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=850, Invalid=4262, Unknown=0, NotChecked=0, Total=5112 [2022-02-11 00:27:46,758 INFO L934 BasicCegarLoop]: 18 mSDtfsCounter, 260 mSDsluCounter, 716 mSDsCounter, 0 mSdLazyCounter, 1260 mSolverCounterSat, 155 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 260 SdHoareTripleChecker+Valid, 447 SdHoareTripleChecker+Invalid, 1415 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 155 IncrementalHoareTripleChecker+Valid, 1260 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-11 00:27:46,758 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [260 Valid, 447 Invalid, 1415 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [155 Valid, 1260 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-11 00:27:46,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 848 states. [2022-02-11 00:27:46,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 848 to 563. [2022-02-11 00:27:46,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 563 states, 562 states have (on average 2.902135231316726) internal successors, (1631), 562 states have internal predecessors, (1631), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:27:46,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 563 states to 563 states and 1631 transitions. [2022-02-11 00:27:46,766 INFO L78 Accepts]: Start accepts. Automaton has 563 states and 1631 transitions. Word has length 18 [2022-02-11 00:27:46,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:27:46,766 INFO L470 AbstractCegarLoop]: Abstraction has 563 states and 1631 transitions. [2022-02-11 00:27:46,767 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.4333333333333333) internal successors, (43), 30 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) [2022-02-11 00:27:46,767 INFO L276 IsEmpty]: Start isEmpty. Operand 563 states and 1631 transitions. [2022-02-11 00:27:46,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-02-11 00:27:46,767 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:27:46,767 INFO L515 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:27:46,784 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (166)] Ended with exit code 0 [2022-02-11 00:27:46,968 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173,166 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:27:46,968 INFO L402 AbstractCegarLoop]: === Iteration 175 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:27:46,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:27:46,968 INFO L85 PathProgramCache]: Analyzing trace with hash -569188401, now seen corresponding path program 166 times [2022-02-11 00:27:46,968 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:27:46,968 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1766753573] [2022-02-11 00:27:46,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:27:46,969 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:27:46,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:27:47,095 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:27:47,095 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:27:47,095 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1766753573] [2022-02-11 00:27:47,095 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1766753573] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:27:47,095 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [88244476] [2022-02-11 00:27:47,095 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-11 00:27:47,096 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:27:47,096 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:27:47,097 INFO L229 MonitoredProcess]: Starting monitored process 167 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:27:47,097 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (167)] Waiting until timeout for monitored process [2022-02-11 00:27:47,149 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-11 00:27:47,149 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:27:47,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 23 conjunts are in the unsatisfiable core [2022-02-11 00:27:47,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:27:47,329 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 73 [2022-02-11 00:27:47,331 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 57 [2022-02-11 00:27:47,411 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:27:47,412 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:27:47,554 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:27:47,554 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 34 treesize of output 34 [2022-02-11 00:27:47,559 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:27:47,559 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 26 treesize of output 26 [2022-02-11 00:27:47,640 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:27:47,640 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [88244476] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:27:47,640 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:27:47,640 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2022-02-11 00:27:47,641 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [203008879] [2022-02-11 00:27:47,641 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:27:47,641 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-11 00:27:47,641 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:27:47,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-11 00:27:47,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2022-02-11 00:27:47,641 INFO L87 Difference]: Start difference. First operand 563 states and 1631 transitions. Second operand has 20 states, 20 states have (on average 1.7) internal successors, (34), 20 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:27:47,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:27:47,927 INFO L93 Difference]: Finished difference Result 679 states and 1836 transitions. [2022-02-11 00:27:47,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-02-11 00:27:47,928 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.7) internal successors, (34), 20 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-02-11 00:27:47,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:27:47,929 INFO L225 Difference]: With dead ends: 679 [2022-02-11 00:27:47,929 INFO L226 Difference]: Without dead ends: 679 [2022-02-11 00:27:47,929 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=100, Invalid=452, Unknown=0, NotChecked=0, Total=552 [2022-02-11 00:27:47,929 INFO L934 BasicCegarLoop]: 16 mSDtfsCounter, 125 mSDsluCounter, 212 mSDsCounter, 0 mSdLazyCounter, 401 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 433 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 401 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-11 00:27:47,929 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [125 Valid, 144 Invalid, 433 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 401 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-11 00:27:47,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 679 states. [2022-02-11 00:27:47,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 679 to 563. [2022-02-11 00:27:47,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 563 states, 562 states have (on average 2.898576512455516) internal successors, (1629), 562 states have internal predecessors, (1629), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:27:47,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 563 states to 563 states and 1629 transitions. [2022-02-11 00:27:47,936 INFO L78 Accepts]: Start accepts. Automaton has 563 states and 1629 transitions. Word has length 18 [2022-02-11 00:27:47,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:27:47,936 INFO L470 AbstractCegarLoop]: Abstraction has 563 states and 1629 transitions. [2022-02-11 00:27:47,936 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.7) internal successors, (34), 20 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:27:47,936 INFO L276 IsEmpty]: Start isEmpty. Operand 563 states and 1629 transitions. [2022-02-11 00:27:47,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-02-11 00:27:47,937 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:27:47,937 INFO L515 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:27:47,955 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (167)] Forceful destruction successful, exit code 0 [2022-02-11 00:27:48,137 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable174,167 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:27:48,137 INFO L402 AbstractCegarLoop]: === Iteration 176 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:27:48,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:27:48,137 INFO L85 PathProgramCache]: Analyzing trace with hash -1913844345, now seen corresponding path program 167 times [2022-02-11 00:27:48,137 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:27:48,137 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [660795007] [2022-02-11 00:27:48,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:27:48,138 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:27:48,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:27:48,335 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:27:48,335 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:27:48,335 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [660795007] [2022-02-11 00:27:48,335 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [660795007] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:27:48,335 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1665362031] [2022-02-11 00:27:48,335 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-11 00:27:48,335 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:27:48,335 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:27:48,336 INFO L229 MonitoredProcess]: Starting monitored process 168 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:27:48,337 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (168)] Waiting until timeout for monitored process [2022-02-11 00:27:48,387 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-11 00:27:48,388 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:27:48,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2022-02-11 00:27:48,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:27:48,683 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 99 treesize of output 83 [2022-02-11 00:27:48,685 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 83 treesize of output 67 [2022-02-11 00:27:48,909 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:27:48,909 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:27:49,218 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-11 00:27:49,218 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 110 treesize of output 97 [2022-02-11 00:27:49,221 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 94 treesize of output 78 [2022-02-11 00:27:49,353 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:27:49,353 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1665362031] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:27:49,353 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:27:49,353 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 10] total 27 [2022-02-11 00:27:49,353 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422326424] [2022-02-11 00:27:49,353 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:27:49,353 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-11 00:27:49,353 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:27:49,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-11 00:27:49,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=611, Unknown=0, NotChecked=0, Total=702 [2022-02-11 00:27:49,354 INFO L87 Difference]: Start difference. First operand 563 states and 1629 transitions. Second operand has 27 states, 27 states have (on average 1.5185185185185186) internal successors, (41), 27 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) [2022-02-11 00:27:51,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:27:51,336 INFO L93 Difference]: Finished difference Result 768 states and 1963 transitions. [2022-02-11 00:27:51,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-02-11 00:27:51,337 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.5185185185185186) internal successors, (41), 27 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 18 [2022-02-11 00:27:51,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:27:51,338 INFO L225 Difference]: With dead ends: 768 [2022-02-11 00:27:51,338 INFO L226 Difference]: Without dead ends: 709 [2022-02-11 00:27:51,338 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 768 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=476, Invalid=2604, Unknown=0, NotChecked=0, Total=3080 [2022-02-11 00:27:51,338 INFO L934 BasicCegarLoop]: 22 mSDtfsCounter, 158 mSDsluCounter, 652 mSDsCounter, 0 mSdLazyCounter, 1046 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 158 SdHoareTripleChecker+Valid, 398 SdHoareTripleChecker+Invalid, 1141 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 1046 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-11 00:27:51,338 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [158 Valid, 398 Invalid, 1141 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 1046 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-11 00:27:51,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 709 states. [2022-02-11 00:27:51,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 709 to 566. [2022-02-11 00:27:51,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 566 states, 565 states have (on average 2.9008849557522125) internal successors, (1639), 565 states have internal predecessors, (1639), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:27:51,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 566 states to 566 states and 1639 transitions. [2022-02-11 00:27:51,345 INFO L78 Accepts]: Start accepts. Automaton has 566 states and 1639 transitions. Word has length 18 [2022-02-11 00:27:51,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:27:51,345 INFO L470 AbstractCegarLoop]: Abstraction has 566 states and 1639 transitions. [2022-02-11 00:27:51,345 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.5185185185185186) internal successors, (41), 27 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) [2022-02-11 00:27:51,346 INFO L276 IsEmpty]: Start isEmpty. Operand 566 states and 1639 transitions. [2022-02-11 00:27:51,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-02-11 00:27:51,346 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:27:51,346 INFO L515 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:27:51,363 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (168)] Forceful destruction successful, exit code 0 [2022-02-11 00:27:51,547 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 168 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable175 [2022-02-11 00:27:51,547 INFO L402 AbstractCegarLoop]: === Iteration 177 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:27:51,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:27:51,547 INFO L85 PathProgramCache]: Analyzing trace with hash 232326415, now seen corresponding path program 168 times [2022-02-11 00:27:51,547 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:27:51,547 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1439185163] [2022-02-11 00:27:51,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:27:51,547 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:27:51,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:27:51,735 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:27:51,735 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:27:51,735 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1439185163] [2022-02-11 00:27:51,735 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1439185163] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:27:51,735 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [423806278] [2022-02-11 00:27:51,735 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-11 00:27:51,736 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:27:51,736 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:27:51,736 INFO L229 MonitoredProcess]: Starting monitored process 169 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:27:51,737 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (169)] Waiting until timeout for monitored process [2022-02-11 00:27:51,787 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-02-11 00:27:51,788 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:27:51,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2022-02-11 00:27:51,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:27:52,103 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 99 treesize of output 83 [2022-02-11 00:27:52,105 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 83 treesize of output 67 [2022-02-11 00:27:52,368 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:27:52,368 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:27:52,747 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-11 00:27:52,748 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 104 treesize of output 91 [2022-02-11 00:27:52,751 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 88 treesize of output 72 [2022-02-11 00:27:52,883 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:27:52,883 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [423806278] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:27:52,883 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:27:52,883 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 10] total 27 [2022-02-11 00:27:52,883 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1379654735] [2022-02-11 00:27:52,883 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:27:52,883 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-11 00:27:52,883 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:27:52,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-11 00:27:52,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=611, Unknown=0, NotChecked=0, Total=702 [2022-02-11 00:27:52,884 INFO L87 Difference]: Start difference. First operand 566 states and 1639 transitions. Second operand has 27 states, 27 states have (on average 1.5185185185185186) internal successors, (41), 27 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) [2022-02-11 00:27:54,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:27:54,831 INFO L93 Difference]: Finished difference Result 781 states and 1981 transitions. [2022-02-11 00:27:54,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-02-11 00:27:54,831 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.5185185185185186) internal successors, (41), 27 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 18 [2022-02-11 00:27:54,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:27:54,832 INFO L225 Difference]: With dead ends: 781 [2022-02-11 00:27:54,832 INFO L226 Difference]: Without dead ends: 724 [2022-02-11 00:27:54,832 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 690 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=445, Invalid=2525, Unknown=0, NotChecked=0, Total=2970 [2022-02-11 00:27:54,833 INFO L934 BasicCegarLoop]: 17 mSDtfsCounter, 186 mSDsluCounter, 673 mSDsCounter, 0 mSdLazyCounter, 1184 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 186 SdHoareTripleChecker+Valid, 403 SdHoareTripleChecker+Invalid, 1268 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 1184 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-11 00:27:54,833 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [186 Valid, 403 Invalid, 1268 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 1184 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-11 00:27:54,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 724 states. [2022-02-11 00:27:54,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 724 to 567. [2022-02-11 00:27:54,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 567 states, 566 states have (on average 2.895759717314488) internal successors, (1639), 566 states have internal predecessors, (1639), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:27:54,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 567 states to 567 states and 1639 transitions. [2022-02-11 00:27:54,839 INFO L78 Accepts]: Start accepts. Automaton has 567 states and 1639 transitions. Word has length 18 [2022-02-11 00:27:54,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:27:54,839 INFO L470 AbstractCegarLoop]: Abstraction has 567 states and 1639 transitions. [2022-02-11 00:27:54,839 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.5185185185185186) internal successors, (41), 27 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) [2022-02-11 00:27:54,840 INFO L276 IsEmpty]: Start isEmpty. Operand 567 states and 1639 transitions. [2022-02-11 00:27:54,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-02-11 00:27:54,840 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:27:54,840 INFO L515 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:27:54,857 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (169)] Ended with exit code 0 [2022-02-11 00:27:55,040 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable176,169 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:27:55,041 INFO L402 AbstractCegarLoop]: === Iteration 178 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:27:55,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:27:55,041 INFO L85 PathProgramCache]: Analyzing trace with hash 1689579501, now seen corresponding path program 169 times [2022-02-11 00:27:55,041 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:27:55,041 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [834260712] [2022-02-11 00:27:55,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:27:55,041 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:27:55,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:27:55,247 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:27:55,248 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:27:55,248 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [834260712] [2022-02-11 00:27:55,248 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [834260712] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:27:55,248 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [773039521] [2022-02-11 00:27:55,248 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-11 00:27:55,248 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:27:55,248 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:27:55,249 INFO L229 MonitoredProcess]: Starting monitored process 170 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:27:55,249 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (170)] Waiting until timeout for monitored process [2022-02-11 00:27:55,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:27:55,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2022-02-11 00:27:55,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:27:55,715 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 59 [2022-02-11 00:27:55,724 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 47 [2022-02-11 00:27:55,873 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:27:55,873 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:27:56,163 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-11 00:27:56,163 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 118 treesize of output 101 [2022-02-11 00:27:56,166 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 98 treesize of output 78 [2022-02-11 00:27:56,287 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-02-11 00:27:56,287 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [773039521] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:27:56,287 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:27:56,287 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 9] total 26 [2022-02-11 00:27:56,287 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1030704187] [2022-02-11 00:27:56,287 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:27:56,288 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-11 00:27:56,288 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:27:56,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-11 00:27:56,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=563, Unknown=0, NotChecked=0, Total=650 [2022-02-11 00:27:56,288 INFO L87 Difference]: Start difference. First operand 567 states and 1639 transitions. Second operand has 26 states, 26 states have (on average 1.5) internal successors, (39), 26 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) [2022-02-11 00:27:57,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:27:57,261 INFO L93 Difference]: Finished difference Result 652 states and 1779 transitions. [2022-02-11 00:27:57,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-02-11 00:27:57,261 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.5) internal successors, (39), 26 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 18 [2022-02-11 00:27:57,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:27:57,262 INFO L225 Difference]: With dead ends: 652 [2022-02-11 00:27:57,262 INFO L226 Difference]: Without dead ends: 625 [2022-02-11 00:27:57,262 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 391 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=258, Invalid=1548, Unknown=0, NotChecked=0, Total=1806 [2022-02-11 00:27:57,263 INFO L934 BasicCegarLoop]: 11 mSDtfsCounter, 126 mSDsluCounter, 350 mSDsCounter, 0 mSdLazyCounter, 640 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 203 SdHoareTripleChecker+Invalid, 696 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 640 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-11 00:27:57,263 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [126 Valid, 203 Invalid, 696 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 640 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-11 00:27:57,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 625 states. [2022-02-11 00:27:57,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 625 to 567. [2022-02-11 00:27:57,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 567 states, 566 states have (on average 2.893992932862191) internal successors, (1638), 566 states have internal predecessors, (1638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:27:57,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 567 states to 567 states and 1638 transitions. [2022-02-11 00:27:57,269 INFO L78 Accepts]: Start accepts. Automaton has 567 states and 1638 transitions. Word has length 18 [2022-02-11 00:27:57,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:27:57,269 INFO L470 AbstractCegarLoop]: Abstraction has 567 states and 1638 transitions. [2022-02-11 00:27:57,269 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.5) internal successors, (39), 26 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) [2022-02-11 00:27:57,269 INFO L276 IsEmpty]: Start isEmpty. Operand 567 states and 1638 transitions. [2022-02-11 00:27:57,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-02-11 00:27:57,270 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:27:57,270 INFO L515 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:27:57,287 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (170)] Forceful destruction successful, exit code 0 [2022-02-11 00:27:57,470 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable177,170 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:27:57,471 INFO L402 AbstractCegarLoop]: === Iteration 179 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:27:57,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:27:57,471 INFO L85 PathProgramCache]: Analyzing trace with hash -1070058481, now seen corresponding path program 170 times [2022-02-11 00:27:57,471 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:27:57,471 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1398154115] [2022-02-11 00:27:57,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:27:57,471 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:27:57,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:27:57,667 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:27:57,667 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:27:57,667 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1398154115] [2022-02-11 00:27:57,668 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1398154115] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:27:57,668 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [937842462] [2022-02-11 00:27:57,668 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-11 00:27:57,668 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:27:57,668 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:27:57,669 INFO L229 MonitoredProcess]: Starting monitored process 171 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:27:57,669 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (171)] Waiting until timeout for monitored process [2022-02-11 00:27:57,719 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-11 00:27:57,719 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:27:57,720 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2022-02-11 00:27:57,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:27:58,061 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 101 treesize of output 85 [2022-02-11 00:27:58,063 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 85 treesize of output 69 [2022-02-11 00:27:58,342 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:27:58,342 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:27:58,770 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-02-11 00:27:58,771 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 119 treesize of output 100 [2022-02-11 00:27:58,775 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 95 treesize of output 71 [2022-02-11 00:27:58,898 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:27:58,898 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [937842462] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:27:58,898 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:27:58,898 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 10] total 27 [2022-02-11 00:27:58,898 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1167591961] [2022-02-11 00:27:58,898 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:27:58,899 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-11 00:27:58,899 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:27:58,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-11 00:27:58,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=608, Unknown=0, NotChecked=0, Total=702 [2022-02-11 00:27:58,899 INFO L87 Difference]: Start difference. First operand 567 states and 1638 transitions. Second operand has 27 states, 27 states have (on average 1.4814814814814814) internal successors, (40), 27 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) [2022-02-11 00:28:00,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:28:00,518 INFO L93 Difference]: Finished difference Result 776 states and 1994 transitions. [2022-02-11 00:28:00,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-02-11 00:28:00,518 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.4814814814814814) internal successors, (40), 27 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 18 [2022-02-11 00:28:00,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:28:00,519 INFO L225 Difference]: With dead ends: 776 [2022-02-11 00:28:00,519 INFO L226 Difference]: Without dead ends: 739 [2022-02-11 00:28:00,519 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 487 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=276, Invalid=1794, Unknown=0, NotChecked=0, Total=2070 [2022-02-11 00:28:00,519 INFO L934 BasicCegarLoop]: 13 mSDtfsCounter, 145 mSDsluCounter, 503 mSDsCounter, 0 mSdLazyCounter, 854 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 289 SdHoareTripleChecker+Invalid, 922 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 854 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-11 00:28:00,519 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [145 Valid, 289 Invalid, 922 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 854 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-11 00:28:00,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 739 states. [2022-02-11 00:28:00,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 739 to 575. [2022-02-11 00:28:00,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 575 states, 574 states have (on average 2.897212543554007) internal successors, (1663), 574 states have internal predecessors, (1663), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:28:00,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 575 states to 575 states and 1663 transitions. [2022-02-11 00:28:00,526 INFO L78 Accepts]: Start accepts. Automaton has 575 states and 1663 transitions. Word has length 18 [2022-02-11 00:28:00,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:28:00,526 INFO L470 AbstractCegarLoop]: Abstraction has 575 states and 1663 transitions. [2022-02-11 00:28:00,526 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.4814814814814814) internal successors, (40), 27 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) [2022-02-11 00:28:00,526 INFO L276 IsEmpty]: Start isEmpty. Operand 575 states and 1663 transitions. [2022-02-11 00:28:00,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-02-11 00:28:00,527 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:28:00,527 INFO L515 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:28:00,548 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (171)] Ended with exit code 0 [2022-02-11 00:28:00,742 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 171 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable178 [2022-02-11 00:28:00,742 INFO L402 AbstractCegarLoop]: === Iteration 180 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:28:00,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:28:00,742 INFO L85 PathProgramCache]: Analyzing trace with hash -1432857785, now seen corresponding path program 171 times [2022-02-11 00:28:00,743 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:28:00,743 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2083773169] [2022-02-11 00:28:00,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:28:00,743 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:28:00,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:28:01,004 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:28:01,004 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:28:01,004 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2083773169] [2022-02-11 00:28:01,004 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2083773169] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:28:01,004 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [403649434] [2022-02-11 00:28:01,004 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-11 00:28:01,004 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:28:01,004 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:28:01,005 INFO L229 MonitoredProcess]: Starting monitored process 172 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:28:01,005 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (172)] Waiting until timeout for monitored process [2022-02-11 00:28:01,061 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-02-11 00:28:01,061 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:28:01,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 42 conjunts are in the unsatisfiable core [2022-02-11 00:28:01,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:28:01,488 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 107 treesize of output 87 [2022-02-11 00:28:01,491 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 59 [2022-02-11 00:28:01,657 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:28:01,657 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:28:02,094 INFO L353 Elim1Store]: treesize reduction 15, result has 48.3 percent of original size [2022-02-11 00:28:02,095 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 120 treesize of output 101 [2022-02-11 00:28:02,098 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:28:02,101 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:28:02,101 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 88 treesize of output 64 [2022-02-11 00:28:02,283 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:28:02,283 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [403649434] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:28:02,283 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:28:02,283 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 30 [2022-02-11 00:28:02,283 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2097232482] [2022-02-11 00:28:02,283 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:28:02,283 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-11 00:28:02,283 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:28:02,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-11 00:28:02,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=765, Unknown=0, NotChecked=0, Total=870 [2022-02-11 00:28:02,284 INFO L87 Difference]: Start difference. First operand 575 states and 1663 transitions. Second operand has 30 states, 30 states have (on average 1.4333333333333333) internal successors, (43), 30 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) [2022-02-11 00:28:03,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:28:03,674 INFO L93 Difference]: Finished difference Result 802 states and 2094 transitions. [2022-02-11 00:28:03,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-02-11 00:28:03,674 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.4333333333333333) internal successors, (43), 30 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 18 [2022-02-11 00:28:03,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:28:03,675 INFO L225 Difference]: With dead ends: 802 [2022-02-11 00:28:03,675 INFO L226 Difference]: Without dead ends: 784 [2022-02-11 00:28:03,676 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 419 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=346, Invalid=1816, Unknown=0, NotChecked=0, Total=2162 [2022-02-11 00:28:03,676 INFO L934 BasicCegarLoop]: 15 mSDtfsCounter, 206 mSDsluCounter, 506 mSDsCounter, 0 mSdLazyCounter, 960 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 206 SdHoareTripleChecker+Valid, 294 SdHoareTripleChecker+Invalid, 1057 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 960 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-11 00:28:03,676 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [206 Valid, 294 Invalid, 1057 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 960 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-11 00:28:03,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 784 states. [2022-02-11 00:28:03,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 784 to 594. [2022-02-11 00:28:03,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 594 states, 593 states have (on average 2.9106239460370995) internal successors, (1726), 593 states have internal predecessors, (1726), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:28:03,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 594 states to 594 states and 1726 transitions. [2022-02-11 00:28:03,683 INFO L78 Accepts]: Start accepts. Automaton has 594 states and 1726 transitions. Word has length 18 [2022-02-11 00:28:03,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:28:03,683 INFO L470 AbstractCegarLoop]: Abstraction has 594 states and 1726 transitions. [2022-02-11 00:28:03,683 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.4333333333333333) internal successors, (43), 30 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) [2022-02-11 00:28:03,683 INFO L276 IsEmpty]: Start isEmpty. Operand 594 states and 1726 transitions. [2022-02-11 00:28:03,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-02-11 00:28:03,684 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:28:03,684 INFO L515 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:28:03,700 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (172)] Forceful destruction successful, exit code 0 [2022-02-11 00:28:03,884 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 172 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable179 [2022-02-11 00:28:03,884 INFO L402 AbstractCegarLoop]: === Iteration 181 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:28:03,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:28:03,885 INFO L85 PathProgramCache]: Analyzing trace with hash 646436043, now seen corresponding path program 172 times [2022-02-11 00:28:03,885 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:28:03,885 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [324833631] [2022-02-11 00:28:03,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:28:03,885 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:28:03,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:28:04,072 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:28:04,072 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:28:04,072 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [324833631] [2022-02-11 00:28:04,072 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [324833631] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:28:04,072 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1315037709] [2022-02-11 00:28:04,072 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-11 00:28:04,072 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:28:04,072 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:28:04,073 INFO L229 MonitoredProcess]: Starting monitored process 173 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:28:04,074 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (173)] Waiting until timeout for monitored process [2022-02-11 00:28:04,125 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-11 00:28:04,125 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:28:04,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2022-02-11 00:28:04,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:28:04,553 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 122 treesize of output 102 [2022-02-11 00:28:04,560 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 90 treesize of output 74 [2022-02-11 00:28:04,832 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:28:04,832 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:28:05,498 INFO L353 Elim1Store]: treesize reduction 19, result has 42.4 percent of original size [2022-02-11 00:28:05,498 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 112 treesize of output 89 [2022-02-11 00:28:05,501 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:28:05,501 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:28:05,508 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:28:05,508 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 76 treesize of output 50 [2022-02-11 00:28:05,603 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:28:05,603 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1315037709] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:28:05,603 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:28:05,603 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 30 [2022-02-11 00:28:05,604 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1271543327] [2022-02-11 00:28:05,604 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:28:05,604 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-11 00:28:05,604 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:28:05,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-11 00:28:05,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=757, Unknown=0, NotChecked=0, Total=870 [2022-02-11 00:28:05,604 INFO L87 Difference]: Start difference. First operand 594 states and 1726 transitions. Second operand has 30 states, 30 states have (on average 1.4333333333333333) internal successors, (43), 30 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) [2022-02-11 00:28:08,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:28:08,664 INFO L93 Difference]: Finished difference Result 878 states and 2220 transitions. [2022-02-11 00:28:08,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-02-11 00:28:08,664 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.4333333333333333) internal successors, (43), 30 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 18 [2022-02-11 00:28:08,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:28:08,666 INFO L225 Difference]: With dead ends: 878 [2022-02-11 00:28:08,666 INFO L226 Difference]: Without dead ends: 852 [2022-02-11 00:28:08,666 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 891 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=573, Invalid=3209, Unknown=0, NotChecked=0, Total=3782 [2022-02-11 00:28:08,666 INFO L934 BasicCegarLoop]: 12 mSDtfsCounter, 312 mSDsluCounter, 621 mSDsCounter, 0 mSdLazyCounter, 1246 mSolverCounterSat, 142 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 312 SdHoareTripleChecker+Valid, 361 SdHoareTripleChecker+Invalid, 1388 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 142 IncrementalHoareTripleChecker+Valid, 1246 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-11 00:28:08,666 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [312 Valid, 361 Invalid, 1388 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [142 Valid, 1246 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-11 00:28:08,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 852 states. [2022-02-11 00:28:08,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 852 to 606. [2022-02-11 00:28:08,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 606 states, 605 states have (on average 2.9173553719008263) internal successors, (1765), 605 states have internal predecessors, (1765), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:28:08,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 606 states to 606 states and 1765 transitions. [2022-02-11 00:28:08,674 INFO L78 Accepts]: Start accepts. Automaton has 606 states and 1765 transitions. Word has length 18 [2022-02-11 00:28:08,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:28:08,674 INFO L470 AbstractCegarLoop]: Abstraction has 606 states and 1765 transitions. [2022-02-11 00:28:08,674 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.4333333333333333) internal successors, (43), 30 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) [2022-02-11 00:28:08,674 INFO L276 IsEmpty]: Start isEmpty. Operand 606 states and 1765 transitions. [2022-02-11 00:28:08,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-02-11 00:28:08,675 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:28:08,675 INFO L515 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:28:08,691 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (173)] Ended with exit code 0 [2022-02-11 00:28:08,875 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable180,173 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:28:08,875 INFO L402 AbstractCegarLoop]: === Iteration 182 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:28:08,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:28:08,875 INFO L85 PathProgramCache]: Analyzing trace with hash -1502360493, now seen corresponding path program 173 times [2022-02-11 00:28:08,875 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:28:08,876 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1440402367] [2022-02-11 00:28:08,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:28:08,876 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:28:08,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:28:09,057 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:28:09,057 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:28:09,057 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1440402367] [2022-02-11 00:28:09,057 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1440402367] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:28:09,057 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1206661203] [2022-02-11 00:28:09,057 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-11 00:28:09,057 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:28:09,057 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:28:09,058 INFO L229 MonitoredProcess]: Starting monitored process 174 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:28:09,059 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (174)] Waiting until timeout for monitored process [2022-02-11 00:28:09,110 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-02-11 00:28:09,110 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:28:09,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2022-02-11 00:28:09,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:28:09,423 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 101 treesize of output 85 [2022-02-11 00:28:09,426 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 85 treesize of output 69 [2022-02-11 00:28:09,656 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:28:09,656 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:28:10,074 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-11 00:28:10,075 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 114 treesize of output 97 [2022-02-11 00:28:10,078 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 94 treesize of output 74 [2022-02-11 00:28:10,226 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:28:10,226 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1206661203] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:28:10,226 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:28:10,227 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 10] total 27 [2022-02-11 00:28:10,227 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1879109326] [2022-02-11 00:28:10,227 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:28:10,227 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-11 00:28:10,227 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:28:10,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-11 00:28:10,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=615, Unknown=0, NotChecked=0, Total=702 [2022-02-11 00:28:10,227 INFO L87 Difference]: Start difference. First operand 606 states and 1765 transitions. Second operand has 27 states, 27 states have (on average 1.5555555555555556) internal successors, (42), 27 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:28:12,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:28:12,111 INFO L93 Difference]: Finished difference Result 857 states and 2198 transitions. [2022-02-11 00:28:12,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-02-11 00:28:12,111 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.5555555555555556) internal successors, (42), 27 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-02-11 00:28:12,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:28:12,113 INFO L225 Difference]: With dead ends: 857 [2022-02-11 00:28:12,113 INFO L226 Difference]: Without dead ends: 814 [2022-02-11 00:28:12,113 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 721 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=432, Invalid=2538, Unknown=0, NotChecked=0, Total=2970 [2022-02-11 00:28:12,113 INFO L934 BasicCegarLoop]: 14 mSDtfsCounter, 220 mSDsluCounter, 589 mSDsCounter, 0 mSdLazyCounter, 1131 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 220 SdHoareTripleChecker+Valid, 359 SdHoareTripleChecker+Invalid, 1226 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 1131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-11 00:28:12,113 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [220 Valid, 359 Invalid, 1226 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 1131 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-11 00:28:12,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 814 states. [2022-02-11 00:28:12,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 814 to 619. [2022-02-11 00:28:12,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 619 states, 618 states have (on average 2.928802588996764) internal successors, (1810), 618 states have internal predecessors, (1810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:28:12,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 619 states to 619 states and 1810 transitions. [2022-02-11 00:28:12,121 INFO L78 Accepts]: Start accepts. Automaton has 619 states and 1810 transitions. Word has length 18 [2022-02-11 00:28:12,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:28:12,121 INFO L470 AbstractCegarLoop]: Abstraction has 619 states and 1810 transitions. [2022-02-11 00:28:12,121 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.5555555555555556) internal successors, (42), 27 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:28:12,121 INFO L276 IsEmpty]: Start isEmpty. Operand 619 states and 1810 transitions. [2022-02-11 00:28:12,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-02-11 00:28:12,122 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:28:12,122 INFO L515 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:28:12,150 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (174)] Forceful destruction successful, exit code 0 [2022-02-11 00:28:12,335 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable181,174 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:28:12,335 INFO L402 AbstractCegarLoop]: === Iteration 183 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:28:12,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:28:12,336 INFO L85 PathProgramCache]: Analyzing trace with hash 604423627, now seen corresponding path program 174 times [2022-02-11 00:28:12,336 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:28:12,336 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [106830865] [2022-02-11 00:28:12,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:28:12,336 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:28:12,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:28:12,519 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:28:12,519 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:28:12,520 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [106830865] [2022-02-11 00:28:12,520 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [106830865] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:28:12,520 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1199479044] [2022-02-11 00:28:12,520 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-11 00:28:12,520 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:28:12,520 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:28:12,521 INFO L229 MonitoredProcess]: Starting monitored process 175 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:28:12,521 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (175)] Waiting until timeout for monitored process [2022-02-11 00:28:12,573 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-11 00:28:12,573 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:28:12,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2022-02-11 00:28:12,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:28:12,907 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 99 treesize of output 83 [2022-02-11 00:28:12,909 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 83 treesize of output 67 [2022-02-11 00:28:13,149 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:28:13,149 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:28:13,639 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-02-11 00:28:13,639 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 138 treesize of output 111 [2022-02-11 00:28:13,643 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 106 treesize of output 74 [2022-02-11 00:28:13,794 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:28:13,794 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1199479044] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:28:13,794 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:28:13,794 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 11] total 28 [2022-02-11 00:28:13,795 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [803085170] [2022-02-11 00:28:13,795 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:28:13,795 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-02-11 00:28:13,795 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:28:13,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-02-11 00:28:13,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=665, Unknown=0, NotChecked=0, Total=756 [2022-02-11 00:28:13,795 INFO L87 Difference]: Start difference. First operand 619 states and 1810 transitions. Second operand has 28 states, 28 states have (on average 1.5) internal successors, (42), 28 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:28:16,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:28:16,428 INFO L93 Difference]: Finished difference Result 861 states and 2212 transitions. [2022-02-11 00:28:16,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-02-11 00:28:16,428 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.5) internal successors, (42), 28 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-02-11 00:28:16,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:28:16,429 INFO L225 Difference]: With dead ends: 861 [2022-02-11 00:28:16,429 INFO L226 Difference]: Without dead ends: 801 [2022-02-11 00:28:16,430 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 999 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=537, Invalid=3369, Unknown=0, NotChecked=0, Total=3906 [2022-02-11 00:28:16,430 INFO L934 BasicCegarLoop]: 12 mSDtfsCounter, 289 mSDsluCounter, 574 mSDsCounter, 0 mSdLazyCounter, 1008 mSolverCounterSat, 148 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 289 SdHoareTripleChecker+Valid, 332 SdHoareTripleChecker+Invalid, 1156 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 148 IncrementalHoareTripleChecker+Valid, 1008 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-11 00:28:16,430 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [289 Valid, 332 Invalid, 1156 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [148 Valid, 1008 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-11 00:28:16,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 801 states. [2022-02-11 00:28:16,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 801 to 618. [2022-02-11 00:28:16,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 618 states, 617 states have (on average 2.918962722852512) internal successors, (1801), 617 states have internal predecessors, (1801), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:28:16,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 618 states to 618 states and 1801 transitions. [2022-02-11 00:28:16,438 INFO L78 Accepts]: Start accepts. Automaton has 618 states and 1801 transitions. Word has length 18 [2022-02-11 00:28:16,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:28:16,438 INFO L470 AbstractCegarLoop]: Abstraction has 618 states and 1801 transitions. [2022-02-11 00:28:16,438 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.5) internal successors, (42), 28 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:28:16,438 INFO L276 IsEmpty]: Start isEmpty. Operand 618 states and 1801 transitions. [2022-02-11 00:28:16,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-02-11 00:28:16,439 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:28:16,439 INFO L515 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:28:16,464 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (175)] Forceful destruction successful, exit code 0 [2022-02-11 00:28:16,655 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 175 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable182 [2022-02-11 00:28:16,655 INFO L402 AbstractCegarLoop]: === Iteration 184 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:28:16,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:28:16,655 INFO L85 PathProgramCache]: Analyzing trace with hash 1490221907, now seen corresponding path program 175 times [2022-02-11 00:28:16,656 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:28:16,656 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1305109967] [2022-02-11 00:28:16,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:28:16,656 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:28:16,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:28:16,863 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:28:16,864 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:28:16,864 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1305109967] [2022-02-11 00:28:16,864 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1305109967] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:28:16,864 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [915113873] [2022-02-11 00:28:16,871 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-11 00:28:16,871 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:28:16,872 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:28:16,872 INFO L229 MonitoredProcess]: Starting monitored process 176 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:28:16,873 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (176)] Waiting until timeout for monitored process [2022-02-11 00:28:16,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:28:16,927 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 39 conjunts are in the unsatisfiable core [2022-02-11 00:28:16,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:28:17,319 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 95 treesize of output 79 [2022-02-11 00:28:17,322 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 79 treesize of output 63 [2022-02-11 00:28:17,587 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:28:17,587 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:28:18,001 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-02-11 00:28:18,001 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 122 treesize of output 103 [2022-02-11 00:28:18,004 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 98 treesize of output 74 [2022-02-11 00:28:18,125 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:28:18,126 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [915113873] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:28:18,126 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:28:18,126 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 30 [2022-02-11 00:28:18,126 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [439576391] [2022-02-11 00:28:18,126 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:28:18,126 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-11 00:28:18,126 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:28:18,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-11 00:28:18,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=788, Unknown=0, NotChecked=0, Total=870 [2022-02-11 00:28:18,126 INFO L87 Difference]: Start difference. First operand 618 states and 1801 transitions. Second operand has 30 states, 30 states have (on average 1.4333333333333333) internal successors, (43), 30 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) [2022-02-11 00:28:21,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:28:21,453 INFO L93 Difference]: Finished difference Result 920 states and 2317 transitions. [2022-02-11 00:28:21,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-02-11 00:28:21,454 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.4333333333333333) internal successors, (43), 30 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 18 [2022-02-11 00:28:21,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:28:21,455 INFO L225 Difference]: With dead ends: 920 [2022-02-11 00:28:21,455 INFO L226 Difference]: Without dead ends: 826 [2022-02-11 00:28:21,455 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 726 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=551, Invalid=3609, Unknown=0, NotChecked=0, Total=4160 [2022-02-11 00:28:21,455 INFO L934 BasicCegarLoop]: 22 mSDtfsCounter, 273 mSDsluCounter, 810 mSDsCounter, 0 mSdLazyCounter, 1426 mSolverCounterSat, 184 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 273 SdHoareTripleChecker+Valid, 483 SdHoareTripleChecker+Invalid, 1610 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 184 IncrementalHoareTripleChecker+Valid, 1426 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-11 00:28:21,455 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [273 Valid, 483 Invalid, 1610 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [184 Valid, 1426 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-11 00:28:21,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 826 states. [2022-02-11 00:28:21,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 826 to 620. [2022-02-11 00:28:21,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 620 states, 619 states have (on average 2.9095315024232633) internal successors, (1801), 619 states have internal predecessors, (1801), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:28:21,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 620 states to 620 states and 1801 transitions. [2022-02-11 00:28:21,463 INFO L78 Accepts]: Start accepts. Automaton has 620 states and 1801 transitions. Word has length 18 [2022-02-11 00:28:21,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:28:21,464 INFO L470 AbstractCegarLoop]: Abstraction has 620 states and 1801 transitions. [2022-02-11 00:28:21,464 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.4333333333333333) internal successors, (43), 30 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) [2022-02-11 00:28:21,464 INFO L276 IsEmpty]: Start isEmpty. Operand 620 states and 1801 transitions. [2022-02-11 00:28:21,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-02-11 00:28:21,464 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:28:21,464 INFO L515 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:28:21,499 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (176)] Forceful destruction successful, exit code 0 [2022-02-11 00:28:21,671 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 176 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable183 [2022-02-11 00:28:21,671 INFO L402 AbstractCegarLoop]: === Iteration 185 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:28:21,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:28:21,672 INFO L85 PathProgramCache]: Analyzing trace with hash -1585268593, now seen corresponding path program 176 times [2022-02-11 00:28:21,672 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:28:21,672 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1930552262] [2022-02-11 00:28:21,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:28:21,672 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:28:21,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:28:21,975 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:28:21,975 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:28:21,975 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1930552262] [2022-02-11 00:28:21,975 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1930552262] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:28:21,975 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1374306640] [2022-02-11 00:28:21,975 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-11 00:28:21,975 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:28:21,976 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:28:21,976 INFO L229 MonitoredProcess]: Starting monitored process 177 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:28:22,003 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (177)] Waiting until timeout for monitored process [2022-02-11 00:28:22,038 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-11 00:28:22,039 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:28:22,039 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2022-02-11 00:28:22,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:28:22,496 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 59 [2022-02-11 00:28:22,498 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 47 [2022-02-11 00:28:22,655 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:28:22,655 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:28:23,018 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-02-11 00:28:23,018 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 147 treesize of output 120 [2022-02-11 00:28:23,021 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 115 treesize of output 83 [2022-02-11 00:28:23,167 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:28:23,167 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1374306640] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:28:23,167 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:28:23,168 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 29 [2022-02-11 00:28:23,168 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1525263191] [2022-02-11 00:28:23,168 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:28:23,168 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-02-11 00:28:23,168 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:28:23,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-02-11 00:28:23,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=702, Unknown=0, NotChecked=0, Total=812 [2022-02-11 00:28:23,168 INFO L87 Difference]: Start difference. First operand 620 states and 1801 transitions. Second operand has 29 states, 29 states have (on average 1.4482758620689655) internal successors, (42), 29 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:28:24,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:28:24,691 INFO L93 Difference]: Finished difference Result 839 states and 2209 transitions. [2022-02-11 00:28:24,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-02-11 00:28:24,692 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.4482758620689655) internal successors, (42), 29 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-02-11 00:28:24,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:28:24,693 INFO L225 Difference]: With dead ends: 839 [2022-02-11 00:28:24,693 INFO L226 Difference]: Without dead ends: 819 [2022-02-11 00:28:24,693 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 544 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=338, Invalid=2212, Unknown=0, NotChecked=0, Total=2550 [2022-02-11 00:28:24,694 INFO L934 BasicCegarLoop]: 24 mSDtfsCounter, 121 mSDsluCounter, 670 mSDsCounter, 0 mSdLazyCounter, 1217 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 388 SdHoareTripleChecker+Invalid, 1280 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 1217 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-11 00:28:24,694 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [121 Valid, 388 Invalid, 1280 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 1217 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-11 00:28:24,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 819 states. [2022-02-11 00:28:24,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 819 to 628. [2022-02-11 00:28:24,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 628 states, 627 states have (on average 2.9186602870813396) internal successors, (1830), 627 states have internal predecessors, (1830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:28:24,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 628 states to 628 states and 1830 transitions. [2022-02-11 00:28:24,703 INFO L78 Accepts]: Start accepts. Automaton has 628 states and 1830 transitions. Word has length 18 [2022-02-11 00:28:24,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:28:24,703 INFO L470 AbstractCegarLoop]: Abstraction has 628 states and 1830 transitions. [2022-02-11 00:28:24,703 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.4482758620689655) internal successors, (42), 29 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:28:24,703 INFO L276 IsEmpty]: Start isEmpty. Operand 628 states and 1830 transitions. [2022-02-11 00:28:24,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-02-11 00:28:24,704 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:28:24,704 INFO L515 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:28:24,720 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (177)] Forceful destruction successful, exit code 0 [2022-02-11 00:28:24,907 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable184,177 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:28:24,908 INFO L402 AbstractCegarLoop]: === Iteration 186 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:28:24,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:28:24,908 INFO L85 PathProgramCache]: Analyzing trace with hash -1551669365, now seen corresponding path program 177 times [2022-02-11 00:28:24,908 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:28:24,908 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1925737167] [2022-02-11 00:28:24,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:28:24,908 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:28:24,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:28:25,199 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:28:25,199 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:28:25,199 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1925737167] [2022-02-11 00:28:25,199 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1925737167] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:28:25,199 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1196011658] [2022-02-11 00:28:25,199 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-11 00:28:25,199 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:28:25,200 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:28:25,200 INFO L229 MonitoredProcess]: Starting monitored process 178 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:28:25,201 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (178)] Waiting until timeout for monitored process [2022-02-11 00:28:25,255 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-02-11 00:28:25,256 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:28:25,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 44 conjunts are in the unsatisfiable core [2022-02-11 00:28:25,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:28:25,828 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 73 [2022-02-11 00:28:25,830 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 49 [2022-02-11 00:28:25,940 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:28:25,941 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:28:26,602 INFO L353 Elim1Store]: treesize reduction 19, result has 42.4 percent of original size [2022-02-11 00:28:26,603 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 156 treesize of output 121 [2022-02-11 00:28:26,605 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:28:26,606 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:28:26,610 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:28:26,610 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 108 treesize of output 70 [2022-02-11 00:28:26,755 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:28:26,755 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1196011658] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:28:26,755 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:28:26,755 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 30 [2022-02-11 00:28:26,755 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [36632850] [2022-02-11 00:28:26,755 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:28:26,755 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-11 00:28:26,755 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:28:26,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-11 00:28:26,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=753, Unknown=0, NotChecked=0, Total=870 [2022-02-11 00:28:26,756 INFO L87 Difference]: Start difference. First operand 628 states and 1830 transitions. Second operand has 30 states, 30 states have (on average 1.4333333333333333) internal successors, (43), 30 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) [2022-02-11 00:28:30,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:28:30,072 INFO L93 Difference]: Finished difference Result 934 states and 2386 transitions. [2022-02-11 00:28:30,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-02-11 00:28:30,072 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.4333333333333333) internal successors, (43), 30 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 18 [2022-02-11 00:28:30,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:28:30,074 INFO L225 Difference]: With dead ends: 934 [2022-02-11 00:28:30,074 INFO L226 Difference]: Without dead ends: 902 [2022-02-11 00:28:30,074 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 982 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=498, Invalid=3534, Unknown=0, NotChecked=0, Total=4032 [2022-02-11 00:28:30,074 INFO L934 BasicCegarLoop]: 16 mSDtfsCounter, 163 mSDsluCounter, 758 mSDsCounter, 0 mSdLazyCounter, 1458 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 163 SdHoareTripleChecker+Valid, 434 SdHoareTripleChecker+Invalid, 1549 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 1458 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-11 00:28:30,074 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [163 Valid, 434 Invalid, 1549 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 1458 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-11 00:28:30,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 902 states. [2022-02-11 00:28:30,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 902 to 636. [2022-02-11 00:28:30,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 636 states, 635 states have (on average 2.925984251968504) internal successors, (1858), 635 states have internal predecessors, (1858), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:28:30,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 636 states to 636 states and 1858 transitions. [2022-02-11 00:28:30,083 INFO L78 Accepts]: Start accepts. Automaton has 636 states and 1858 transitions. Word has length 18 [2022-02-11 00:28:30,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:28:30,083 INFO L470 AbstractCegarLoop]: Abstraction has 636 states and 1858 transitions. [2022-02-11 00:28:30,083 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.4333333333333333) internal successors, (43), 30 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) [2022-02-11 00:28:30,083 INFO L276 IsEmpty]: Start isEmpty. Operand 636 states and 1858 transitions. [2022-02-11 00:28:30,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-02-11 00:28:30,083 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:28:30,084 INFO L515 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:28:30,099 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (178)] Ended with exit code 0 [2022-02-11 00:28:30,284 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable185,178 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:28:30,284 INFO L402 AbstractCegarLoop]: === Iteration 187 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:28:30,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:28:30,284 INFO L85 PathProgramCache]: Analyzing trace with hash 527624463, now seen corresponding path program 178 times [2022-02-11 00:28:30,284 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:28:30,284 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1697811887] [2022-02-11 00:28:30,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:28:30,284 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:28:30,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:28:30,495 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:28:30,495 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:28:30,495 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1697811887] [2022-02-11 00:28:30,495 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1697811887] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:28:30,495 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1992616856] [2022-02-11 00:28:30,495 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-11 00:28:30,495 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:28:30,495 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:28:30,496 INFO L229 MonitoredProcess]: Starting monitored process 179 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:28:30,497 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (179)] Waiting until timeout for monitored process [2022-02-11 00:28:30,548 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-11 00:28:30,548 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:28:30,548 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2022-02-11 00:28:30,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:28:30,932 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 115 treesize of output 95 [2022-02-11 00:28:30,934 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 83 treesize of output 67 [2022-02-11 00:28:31,169 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:28:31,169 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:28:31,794 INFO L353 Elim1Store]: treesize reduction 17, result has 48.5 percent of original size [2022-02-11 00:28:31,794 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 112 treesize of output 91 [2022-02-11 00:28:31,797 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:28:31,798 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:28:31,802 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:28:31,802 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 76 treesize of output 50 [2022-02-11 00:28:31,878 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:28:31,879 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1992616856] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:28:31,879 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:28:31,879 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 29 [2022-02-11 00:28:31,879 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1082521537] [2022-02-11 00:28:31,879 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:28:31,879 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-02-11 00:28:31,879 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:28:31,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-02-11 00:28:31,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=708, Unknown=0, NotChecked=0, Total=812 [2022-02-11 00:28:31,880 INFO L87 Difference]: Start difference. First operand 636 states and 1858 transitions. Second operand has 29 states, 29 states have (on average 1.4482758620689655) internal successors, (42), 29 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:28:33,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:28:33,742 INFO L93 Difference]: Finished difference Result 807 states and 2160 transitions. [2022-02-11 00:28:33,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-02-11 00:28:33,743 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.4482758620689655) internal successors, (42), 29 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-02-11 00:28:33,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:28:33,744 INFO L225 Difference]: With dead ends: 807 [2022-02-11 00:28:33,744 INFO L226 Difference]: Without dead ends: 781 [2022-02-11 00:28:33,744 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 523 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=383, Invalid=2167, Unknown=0, NotChecked=0, Total=2550 [2022-02-11 00:28:33,744 INFO L934 BasicCegarLoop]: 13 mSDtfsCounter, 257 mSDsluCounter, 641 mSDsCounter, 0 mSdLazyCounter, 1306 mSolverCounterSat, 123 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 257 SdHoareTripleChecker+Valid, 359 SdHoareTripleChecker+Invalid, 1429 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 123 IncrementalHoareTripleChecker+Valid, 1306 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-11 00:28:33,744 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [257 Valid, 359 Invalid, 1429 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [123 Valid, 1306 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-11 00:28:33,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 781 states. [2022-02-11 00:28:33,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 781 to 637. [2022-02-11 00:28:33,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 637 states, 636 states have (on average 2.9245283018867925) internal successors, (1860), 636 states have internal predecessors, (1860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:28:33,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 637 states to 637 states and 1860 transitions. [2022-02-11 00:28:33,752 INFO L78 Accepts]: Start accepts. Automaton has 637 states and 1860 transitions. Word has length 18 [2022-02-11 00:28:33,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:28:33,752 INFO L470 AbstractCegarLoop]: Abstraction has 637 states and 1860 transitions. [2022-02-11 00:28:33,752 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.4482758620689655) internal successors, (42), 29 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:28:33,752 INFO L276 IsEmpty]: Start isEmpty. Operand 637 states and 1860 transitions. [2022-02-11 00:28:33,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-02-11 00:28:33,753 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:28:33,753 INFO L515 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:28:33,768 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (179)] Ended with exit code 0 [2022-02-11 00:28:33,953 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable186,179 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:28:33,953 INFO L402 AbstractCegarLoop]: === Iteration 188 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:28:33,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:28:33,953 INFO L85 PathProgramCache]: Analyzing trace with hash -300441973, now seen corresponding path program 179 times [2022-02-11 00:28:33,953 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:28:33,953 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1542973092] [2022-02-11 00:28:33,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:28:33,954 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:28:33,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:28:34,060 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:28:34,060 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:28:34,060 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1542973092] [2022-02-11 00:28:34,061 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1542973092] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:28:34,061 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [31197527] [2022-02-11 00:28:34,061 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-11 00:28:34,061 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:28:34,061 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:28:34,062 INFO L229 MonitoredProcess]: Starting monitored process 180 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:28:34,062 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (180)] Waiting until timeout for monitored process [2022-02-11 00:28:34,115 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-02-11 00:28:34,115 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:28:34,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 23 conjunts are in the unsatisfiable core [2022-02-11 00:28:34,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:28:34,312 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 73 [2022-02-11 00:28:34,314 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 57 [2022-02-11 00:28:34,386 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:28:34,386 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:28:34,500 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:28:34,501 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 33 treesize of output 33 [2022-02-11 00:28:34,505 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:28:34,505 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 25 treesize of output 25 [2022-02-11 00:28:34,570 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:28:34,570 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [31197527] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:28:34,570 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:28:34,571 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2022-02-11 00:28:34,572 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [880772924] [2022-02-11 00:28:34,572 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:28:34,572 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-11 00:28:34,572 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:28:34,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-11 00:28:34,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2022-02-11 00:28:34,572 INFO L87 Difference]: Start difference. First operand 637 states and 1860 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 19 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:28:34,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:28:34,951 INFO L93 Difference]: Finished difference Result 778 states and 2114 transitions. [2022-02-11 00:28:34,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-02-11 00:28:34,952 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 19 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-02-11 00:28:34,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:28:34,953 INFO L225 Difference]: With dead ends: 778 [2022-02-11 00:28:34,953 INFO L226 Difference]: Without dead ends: 778 [2022-02-11 00:28:34,953 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=120, Invalid=582, Unknown=0, NotChecked=0, Total=702 [2022-02-11 00:28:34,953 INFO L934 BasicCegarLoop]: 18 mSDtfsCounter, 117 mSDsluCounter, 272 mSDsCounter, 0 mSdLazyCounter, 500 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 170 SdHoareTripleChecker+Invalid, 532 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 500 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-11 00:28:34,953 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [117 Valid, 170 Invalid, 532 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 500 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-11 00:28:34,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 778 states. [2022-02-11 00:28:34,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 778 to 638. [2022-02-11 00:28:34,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 638 states, 637 states have (on average 2.9215070643642074) internal successors, (1861), 637 states have internal predecessors, (1861), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:28:34,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 638 states to 638 states and 1861 transitions. [2022-02-11 00:28:34,961 INFO L78 Accepts]: Start accepts. Automaton has 638 states and 1861 transitions. Word has length 18 [2022-02-11 00:28:34,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:28:34,961 INFO L470 AbstractCegarLoop]: Abstraction has 638 states and 1861 transitions. [2022-02-11 00:28:34,961 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 19 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:28:34,961 INFO L276 IsEmpty]: Start isEmpty. Operand 638 states and 1861 transitions. [2022-02-11 00:28:34,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-02-11 00:28:34,961 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:28:34,961 INFO L515 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:28:34,977 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (180)] Forceful destruction successful, exit code 0 [2022-02-11 00:28:35,162 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable187,180 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:28:35,162 INFO L402 AbstractCegarLoop]: === Iteration 189 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:28:35,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:28:35,162 INFO L85 PathProgramCache]: Analyzing trace with hash -1660558713, now seen corresponding path program 180 times [2022-02-11 00:28:35,162 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:28:35,162 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [132772940] [2022-02-11 00:28:35,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:28:35,162 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:28:35,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:28:35,359 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:28:35,359 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:28:35,359 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [132772940] [2022-02-11 00:28:35,359 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [132772940] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:28:35,359 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [462356917] [2022-02-11 00:28:35,359 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-11 00:28:35,359 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:28:35,359 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:28:35,360 INFO L229 MonitoredProcess]: Starting monitored process 181 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:28:35,361 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (181)] Waiting until timeout for monitored process [2022-02-11 00:28:35,422 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-02-11 00:28:35,422 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:28:35,423 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2022-02-11 00:28:35,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:28:35,814 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 106 treesize of output 90 [2022-02-11 00:28:35,816 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 90 treesize of output 74 [2022-02-11 00:28:36,061 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:28:36,061 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:28:36,440 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-11 00:28:36,441 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 106 treesize of output 93 [2022-02-11 00:28:36,444 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 90 treesize of output 74 [2022-02-11 00:28:36,592 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:28:36,592 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [462356917] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:28:36,592 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:28:36,592 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 11] total 28 [2022-02-11 00:28:36,592 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1376518015] [2022-02-11 00:28:36,592 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:28:36,592 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-02-11 00:28:36,592 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:28:36,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-02-11 00:28:36,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=655, Unknown=0, NotChecked=0, Total=756 [2022-02-11 00:28:36,593 INFO L87 Difference]: Start difference. First operand 638 states and 1861 transitions. Second operand has 28 states, 28 states have (on average 1.5) internal successors, (42), 28 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:28:38,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:28:38,482 INFO L93 Difference]: Finished difference Result 924 states and 2340 transitions. [2022-02-11 00:28:38,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-02-11 00:28:38,482 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.5) internal successors, (42), 28 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-02-11 00:28:38,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:28:38,483 INFO L225 Difference]: With dead ends: 924 [2022-02-11 00:28:38,483 INFO L226 Difference]: Without dead ends: 873 [2022-02-11 00:28:38,484 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 687 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=401, Invalid=2569, Unknown=0, NotChecked=0, Total=2970 [2022-02-11 00:28:38,484 INFO L934 BasicCegarLoop]: 23 mSDtfsCounter, 171 mSDsluCounter, 757 mSDsCounter, 0 mSdLazyCounter, 1286 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 171 SdHoareTripleChecker+Valid, 468 SdHoareTripleChecker+Invalid, 1362 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 1286 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-11 00:28:38,484 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [171 Valid, 468 Invalid, 1362 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 1286 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-11 00:28:38,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 873 states. [2022-02-11 00:28:38,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 873 to 640. [2022-02-11 00:28:38,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 640 states, 639 states have (on average 2.92018779342723) internal successors, (1866), 639 states have internal predecessors, (1866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:28:38,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 640 states to 640 states and 1866 transitions. [2022-02-11 00:28:38,501 INFO L78 Accepts]: Start accepts. Automaton has 640 states and 1866 transitions. Word has length 18 [2022-02-11 00:28:38,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:28:38,501 INFO L470 AbstractCegarLoop]: Abstraction has 640 states and 1866 transitions. [2022-02-11 00:28:38,501 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.5) internal successors, (42), 28 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:28:38,501 INFO L276 IsEmpty]: Start isEmpty. Operand 640 states and 1866 transitions. [2022-02-11 00:28:38,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-02-11 00:28:38,502 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:28:38,502 INFO L515 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:28:38,518 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (181)] Ended with exit code 0 [2022-02-11 00:28:38,715 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 181 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable188 [2022-02-11 00:28:38,715 INFO L402 AbstractCegarLoop]: === Iteration 190 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:28:38,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:28:38,716 INFO L85 PathProgramCache]: Analyzing trace with hash 485612047, now seen corresponding path program 181 times [2022-02-11 00:28:38,716 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:28:38,716 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1239974815] [2022-02-11 00:28:38,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:28:38,716 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:28:38,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:28:38,899 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:28:38,900 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:28:38,900 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1239974815] [2022-02-11 00:28:38,900 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1239974815] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:28:38,900 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1865061828] [2022-02-11 00:28:38,900 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-11 00:28:38,900 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:28:38,900 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:28:38,901 INFO L229 MonitoredProcess]: Starting monitored process 182 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:28:38,901 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (182)] Waiting until timeout for monitored process [2022-02-11 00:28:38,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:28:38,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2022-02-11 00:28:38,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:28:39,301 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 99 treesize of output 83 [2022-02-11 00:28:39,303 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 83 treesize of output 67 [2022-02-11 00:28:39,547 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:28:39,547 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:28:39,910 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-11 00:28:39,910 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 103 treesize of output 90 [2022-02-11 00:28:39,913 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 87 treesize of output 71 [2022-02-11 00:28:40,075 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:28:40,076 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1865061828] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:28:40,076 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:28:40,076 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 11] total 28 [2022-02-11 00:28:40,076 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1999095894] [2022-02-11 00:28:40,076 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:28:40,076 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-02-11 00:28:40,076 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:28:40,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-02-11 00:28:40,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=656, Unknown=0, NotChecked=0, Total=756 [2022-02-11 00:28:40,077 INFO L87 Difference]: Start difference. First operand 640 states and 1866 transitions. Second operand has 28 states, 28 states have (on average 1.5) internal successors, (42), 28 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:28:41,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:28:41,949 INFO L93 Difference]: Finished difference Result 890 states and 2289 transitions. [2022-02-11 00:28:41,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-02-11 00:28:41,949 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.5) internal successors, (42), 28 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-02-11 00:28:41,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:28:41,951 INFO L225 Difference]: With dead ends: 890 [2022-02-11 00:28:41,951 INFO L226 Difference]: Without dead ends: 847 [2022-02-11 00:28:41,951 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 826 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=470, Invalid=2952, Unknown=0, NotChecked=0, Total=3422 [2022-02-11 00:28:41,951 INFO L934 BasicCegarLoop]: 21 mSDtfsCounter, 186 mSDsluCounter, 650 mSDsCounter, 0 mSdLazyCounter, 1135 mSolverCounterSat, 101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 186 SdHoareTripleChecker+Valid, 381 SdHoareTripleChecker+Invalid, 1236 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 1135 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-11 00:28:41,951 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [186 Valid, 381 Invalid, 1236 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 1135 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-11 00:28:41,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 847 states. [2022-02-11 00:28:41,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 847 to 639. [2022-02-11 00:28:41,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 639 states, 638 states have (on average 2.913793103448276) internal successors, (1859), 638 states have internal predecessors, (1859), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:28:41,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 639 states to 639 states and 1859 transitions. [2022-02-11 00:28:41,959 INFO L78 Accepts]: Start accepts. Automaton has 639 states and 1859 transitions. Word has length 18 [2022-02-11 00:28:41,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:28:41,959 INFO L470 AbstractCegarLoop]: Abstraction has 639 states and 1859 transitions. [2022-02-11 00:28:41,959 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.5) internal successors, (42), 28 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:28:41,959 INFO L276 IsEmpty]: Start isEmpty. Operand 639 states and 1859 transitions. [2022-02-11 00:28:41,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-02-11 00:28:41,960 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:28:41,960 INFO L515 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:28:41,983 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (182)] Ended with exit code 0 [2022-02-11 00:28:42,160 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 182 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable189 [2022-02-11 00:28:42,160 INFO L402 AbstractCegarLoop]: === Iteration 191 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:28:42,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:28:42,160 INFO L85 PathProgramCache]: Analyzing trace with hash -759299637, now seen corresponding path program 182 times [2022-02-11 00:28:42,160 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:28:42,160 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1363243963] [2022-02-11 00:28:42,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:28:42,161 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:28:42,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:28:42,339 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:28:42,340 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:28:42,340 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1363243963] [2022-02-11 00:28:42,340 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1363243963] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:28:42,340 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [917092394] [2022-02-11 00:28:42,340 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-11 00:28:42,340 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:28:42,340 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:28:42,342 INFO L229 MonitoredProcess]: Starting monitored process 183 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:28:42,342 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (183)] Waiting until timeout for monitored process [2022-02-11 00:28:42,393 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-11 00:28:42,393 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:28:42,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2022-02-11 00:28:42,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:28:42,753 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 104 treesize of output 88 [2022-02-11 00:28:42,756 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 88 treesize of output 72 [2022-02-11 00:28:43,041 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:28:43,041 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:28:43,359 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-11 00:28:43,359 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 110 treesize of output 97 [2022-02-11 00:28:43,363 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 94 treesize of output 78 [2022-02-11 00:28:43,497 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:28:43,497 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [917092394] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:28:43,497 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:28:43,497 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 10] total 26 [2022-02-11 00:28:43,497 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [627525894] [2022-02-11 00:28:43,497 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:28:43,497 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-11 00:28:43,497 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:28:43,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-11 00:28:43,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=563, Unknown=0, NotChecked=0, Total=650 [2022-02-11 00:28:43,498 INFO L87 Difference]: Start difference. First operand 639 states and 1859 transitions. Second operand has 26 states, 26 states have (on average 1.5) internal successors, (39), 26 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) [2022-02-11 00:28:44,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:28:44,399 INFO L93 Difference]: Finished difference Result 782 states and 2110 transitions. [2022-02-11 00:28:44,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-02-11 00:28:44,400 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.5) internal successors, (39), 26 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 18 [2022-02-11 00:28:44,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:28:44,401 INFO L225 Difference]: With dead ends: 782 [2022-02-11 00:28:44,401 INFO L226 Difference]: Without dead ends: 761 [2022-02-11 00:28:44,401 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 283 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=191, Invalid=1215, Unknown=0, NotChecked=0, Total=1406 [2022-02-11 00:28:44,401 INFO L934 BasicCegarLoop]: 12 mSDtfsCounter, 121 mSDsluCounter, 446 mSDsCounter, 0 mSdLazyCounter, 956 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 247 SdHoareTripleChecker+Invalid, 1014 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 956 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-11 00:28:44,401 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [121 Valid, 247 Invalid, 1014 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 956 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-11 00:28:44,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 761 states. [2022-02-11 00:28:44,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 761 to 640. [2022-02-11 00:28:44,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 640 states, 639 states have (on average 2.9107981220657275) internal successors, (1860), 639 states have internal predecessors, (1860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:28:44,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 640 states to 640 states and 1860 transitions. [2022-02-11 00:28:44,409 INFO L78 Accepts]: Start accepts. Automaton has 640 states and 1860 transitions. Word has length 18 [2022-02-11 00:28:44,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:28:44,409 INFO L470 AbstractCegarLoop]: Abstraction has 640 states and 1860 transitions. [2022-02-11 00:28:44,409 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.5) internal successors, (39), 26 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) [2022-02-11 00:28:44,409 INFO L276 IsEmpty]: Start isEmpty. Operand 640 states and 1860 transitions. [2022-02-11 00:28:44,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-02-11 00:28:44,410 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:28:44,410 INFO L515 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:28:44,426 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (183)] Ended with exit code 0 [2022-02-11 00:28:44,611 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable190,183 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:28:44,611 INFO L402 AbstractCegarLoop]: === Iteration 192 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:28:44,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:28:44,612 INFO L85 PathProgramCache]: Analyzing trace with hash 1386871123, now seen corresponding path program 183 times [2022-02-11 00:28:44,612 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:28:44,612 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1154051106] [2022-02-11 00:28:44,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:28:44,612 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:28:44,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:28:44,797 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:28:44,797 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:28:44,798 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1154051106] [2022-02-11 00:28:44,798 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1154051106] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:28:44,798 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1619029255] [2022-02-11 00:28:44,798 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-11 00:28:44,798 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:28:44,798 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:28:44,799 INFO L229 MonitoredProcess]: Starting monitored process 184 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:28:44,800 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (184)] Waiting until timeout for monitored process [2022-02-11 00:28:44,857 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-02-11 00:28:44,857 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:28:44,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 42 conjunts are in the unsatisfiable core [2022-02-11 00:28:44,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:28:45,172 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 101 treesize of output 85 [2022-02-11 00:28:45,174 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 85 treesize of output 69 [2022-02-11 00:28:45,487 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:28:45,487 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:28:45,778 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-11 00:28:45,778 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 106 treesize of output 93 [2022-02-11 00:28:45,783 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 90 treesize of output 74 [2022-02-11 00:28:45,917 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-11 00:28:45,917 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1619029255] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:28:45,917 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:28:45,917 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 10] total 26 [2022-02-11 00:28:45,917 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1380446107] [2022-02-11 00:28:45,917 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:28:45,917 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-11 00:28:45,917 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:28:45,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-11 00:28:45,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=562, Unknown=0, NotChecked=0, Total=650 [2022-02-11 00:28:45,918 INFO L87 Difference]: Start difference. First operand 640 states and 1860 transitions. Second operand has 26 states, 26 states have (on average 1.5) internal successors, (39), 26 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) [2022-02-11 00:28:47,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:28:47,794 INFO L93 Difference]: Finished difference Result 833 states and 2180 transitions. [2022-02-11 00:28:47,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-02-11 00:28:47,795 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.5) internal successors, (39), 26 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 18 [2022-02-11 00:28:47,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:28:47,796 INFO L225 Difference]: With dead ends: 833 [2022-02-11 00:28:47,796 INFO L226 Difference]: Without dead ends: 789 [2022-02-11 00:28:47,797 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 592 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=358, Invalid=2192, Unknown=0, NotChecked=0, Total=2550 [2022-02-11 00:28:47,797 INFO L934 BasicCegarLoop]: 17 mSDtfsCounter, 165 mSDsluCounter, 606 mSDsCounter, 0 mSdLazyCounter, 987 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 165 SdHoareTripleChecker+Valid, 355 SdHoareTripleChecker+Invalid, 1057 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 987 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-11 00:28:47,797 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [165 Valid, 355 Invalid, 1057 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 987 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-11 00:28:47,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 789 states. [2022-02-11 00:28:47,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 789 to 643. [2022-02-11 00:28:47,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 643 states, 642 states have (on average 2.911214953271028) internal successors, (1869), 642 states have internal predecessors, (1869), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:28:47,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 643 states to 643 states and 1869 transitions. [2022-02-11 00:28:47,805 INFO L78 Accepts]: Start accepts. Automaton has 643 states and 1869 transitions. Word has length 18 [2022-02-11 00:28:47,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:28:47,805 INFO L470 AbstractCegarLoop]: Abstraction has 643 states and 1869 transitions. [2022-02-11 00:28:47,805 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.5) internal successors, (39), 26 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) [2022-02-11 00:28:47,805 INFO L276 IsEmpty]: Start isEmpty. Operand 643 states and 1869 transitions. [2022-02-11 00:28:47,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-02-11 00:28:47,806 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:28:47,806 INFO L515 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:28:47,839 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (184)] Forceful destruction successful, exit code 0 [2022-02-11 00:28:48,023 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable191,184 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:28:48,023 INFO L402 AbstractCegarLoop]: === Iteration 193 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:28:48,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:28:48,023 INFO L85 PathProgramCache]: Analyzing trace with hash -816772849, now seen corresponding path program 184 times [2022-02-11 00:28:48,023 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:28:48,023 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1816850494] [2022-02-11 00:28:48,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:28:48,024 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:28:48,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:28:48,252 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:28:48,252 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:28:48,253 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1816850494] [2022-02-11 00:28:48,253 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1816850494] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:28:48,253 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [504441085] [2022-02-11 00:28:48,253 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-11 00:28:48,253 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:28:48,253 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:28:48,254 INFO L229 MonitoredProcess]: Starting monitored process 185 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:28:48,254 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (185)] Waiting until timeout for monitored process [2022-02-11 00:28:48,311 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-11 00:28:48,311 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:28:48,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 39 conjunts are in the unsatisfiable core [2022-02-11 00:28:48,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:28:48,688 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 93 treesize of output 77 [2022-02-11 00:28:48,690 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 77 treesize of output 61 [2022-02-11 00:28:48,937 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:28:48,937 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:28:49,343 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-02-11 00:28:49,344 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 119 treesize of output 100 [2022-02-11 00:28:49,346 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 95 treesize of output 71 [2022-02-11 00:28:49,453 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:28:49,453 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [504441085] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:28:49,454 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:28:49,454 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 11] total 28 [2022-02-11 00:28:49,454 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1129108576] [2022-02-11 00:28:49,454 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:28:49,454 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-02-11 00:28:49,454 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:28:49,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-02-11 00:28:49,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=672, Unknown=0, NotChecked=0, Total=756 [2022-02-11 00:28:49,454 INFO L87 Difference]: Start difference. First operand 643 states and 1869 transitions. Second operand has 28 states, 28 states have (on average 1.5) internal successors, (42), 28 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:28:51,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:28:51,500 INFO L93 Difference]: Finished difference Result 878 states and 2281 transitions. [2022-02-11 00:28:51,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-02-11 00:28:51,500 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.5) internal successors, (42), 28 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-02-11 00:28:51,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:28:51,501 INFO L225 Difference]: With dead ends: 878 [2022-02-11 00:28:51,501 INFO L226 Difference]: Without dead ends: 837 [2022-02-11 00:28:51,502 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 561 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=352, Invalid=2510, Unknown=0, NotChecked=0, Total=2862 [2022-02-11 00:28:51,502 INFO L934 BasicCegarLoop]: 13 mSDtfsCounter, 243 mSDsluCounter, 618 mSDsCounter, 0 mSdLazyCounter, 1179 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 243 SdHoareTripleChecker+Valid, 342 SdHoareTripleChecker+Invalid, 1288 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 1179 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-11 00:28:51,502 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [243 Valid, 342 Invalid, 1288 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [109 Valid, 1179 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-11 00:28:51,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 837 states. [2022-02-11 00:28:51,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 837 to 648. [2022-02-11 00:28:51,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 648 states, 647 states have (on average 2.910355486862442) internal successors, (1883), 647 states have internal predecessors, (1883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:28:51,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 648 states to 648 states and 1883 transitions. [2022-02-11 00:28:51,510 INFO L78 Accepts]: Start accepts. Automaton has 648 states and 1883 transitions. Word has length 18 [2022-02-11 00:28:51,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:28:51,510 INFO L470 AbstractCegarLoop]: Abstraction has 648 states and 1883 transitions. [2022-02-11 00:28:51,510 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.5) internal successors, (42), 28 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:28:51,510 INFO L276 IsEmpty]: Start isEmpty. Operand 648 states and 1883 transitions. [2022-02-11 00:28:51,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-02-11 00:28:51,511 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:28:51,511 INFO L515 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:28:51,529 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (185)] Forceful destruction successful, exit code 0 [2022-02-11 00:28:51,711 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable192,185 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:28:51,711 INFO L402 AbstractCegarLoop]: === Iteration 194 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:28:51,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:28:51,711 INFO L85 PathProgramCache]: Analyzing trace with hash -1164111357, now seen corresponding path program 185 times [2022-02-11 00:28:51,711 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:28:51,711 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [693458068] [2022-02-11 00:28:51,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:28:51,712 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:28:51,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:28:51,981 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:28:51,981 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:28:51,981 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [693458068] [2022-02-11 00:28:51,981 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [693458068] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:28:51,981 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1145464144] [2022-02-11 00:28:51,981 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-11 00:28:51,981 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:28:51,981 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:28:51,982 INFO L229 MonitoredProcess]: Starting monitored process 186 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:28:51,983 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (186)] Waiting until timeout for monitored process [2022-02-11 00:28:52,047 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-02-11 00:28:52,047 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:28:52,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2022-02-11 00:28:52,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:28:52,414 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 57 [2022-02-11 00:28:52,416 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 45 [2022-02-11 00:28:52,524 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:28:52,525 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:28:52,891 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-11 00:28:52,891 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 122 treesize of output 105 [2022-02-11 00:28:52,894 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 102 treesize of output 82 [2022-02-11 00:28:53,041 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:28:53,041 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1145464144] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:28:53,041 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:28:53,041 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 11] total 27 [2022-02-11 00:28:53,041 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [122745809] [2022-02-11 00:28:53,041 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:28:53,041 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-11 00:28:53,041 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:28:53,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-11 00:28:53,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=616, Unknown=0, NotChecked=0, Total=702 [2022-02-11 00:28:53,042 INFO L87 Difference]: Start difference. First operand 648 states and 1883 transitions. Second operand has 27 states, 27 states have (on average 1.5185185185185186) internal successors, (41), 27 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) [2022-02-11 00:28:54,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:28:54,306 INFO L93 Difference]: Finished difference Result 893 states and 2339 transitions. [2022-02-11 00:28:54,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-02-11 00:28:54,307 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.5185185185185186) internal successors, (41), 27 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 18 [2022-02-11 00:28:54,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:28:54,308 INFO L225 Difference]: With dead ends: 893 [2022-02-11 00:28:54,308 INFO L226 Difference]: Without dead ends: 851 [2022-02-11 00:28:54,308 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 356 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=334, Invalid=1646, Unknown=0, NotChecked=0, Total=1980 [2022-02-11 00:28:54,308 INFO L934 BasicCegarLoop]: 19 mSDtfsCounter, 181 mSDsluCounter, 678 mSDsCounter, 0 mSdLazyCounter, 1253 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 181 SdHoareTripleChecker+Valid, 386 SdHoareTripleChecker+Invalid, 1335 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 1253 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-11 00:28:54,309 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [181 Valid, 386 Invalid, 1335 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 1253 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-11 00:28:54,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 851 states. [2022-02-11 00:28:54,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 851 to 659. [2022-02-11 00:28:54,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 659 states, 658 states have (on average 2.9133738601823707) internal successors, (1917), 658 states have internal predecessors, (1917), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:28:54,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 659 states to 659 states and 1917 transitions. [2022-02-11 00:28:54,317 INFO L78 Accepts]: Start accepts. Automaton has 659 states and 1917 transitions. Word has length 18 [2022-02-11 00:28:54,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:28:54,317 INFO L470 AbstractCegarLoop]: Abstraction has 659 states and 1917 transitions. [2022-02-11 00:28:54,317 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.5185185185185186) internal successors, (41), 27 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) [2022-02-11 00:28:54,317 INFO L276 IsEmpty]: Start isEmpty. Operand 659 states and 1917 transitions. [2022-02-11 00:28:54,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-02-11 00:28:54,318 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:28:54,318 INFO L515 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:28:54,334 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (186)] Ended with exit code 0 [2022-02-11 00:28:54,518 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable193,186 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:28:54,518 INFO L402 AbstractCegarLoop]: === Iteration 195 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:28:54,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:28:54,518 INFO L85 PathProgramCache]: Analyzing trace with hash -1233614065, now seen corresponding path program 186 times [2022-02-11 00:28:54,518 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:28:54,518 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [136247155] [2022-02-11 00:28:54,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:28:54,518 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:28:54,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:28:54,698 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:28:54,698 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:28:54,698 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [136247155] [2022-02-11 00:28:54,698 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [136247155] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:28:54,698 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1206930171] [2022-02-11 00:28:54,698 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-11 00:28:54,699 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:28:54,699 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:28:54,699 INFO L229 MonitoredProcess]: Starting monitored process 187 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:28:54,700 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (187)] Waiting until timeout for monitored process [2022-02-11 00:28:54,759 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-02-11 00:28:54,759 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:28:54,760 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2022-02-11 00:28:54,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:28:55,107 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 99 treesize of output 83 [2022-02-11 00:28:55,109 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 83 treesize of output 67 [2022-02-11 00:28:55,379 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:28:55,379 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:28:55,699 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-11 00:28:55,699 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 108 treesize of output 95 [2022-02-11 00:28:55,702 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 92 treesize of output 76 [2022-02-11 00:28:55,855 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:28:55,855 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1206930171] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:28:55,855 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:28:55,855 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 11] total 28 [2022-02-11 00:28:55,855 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14401693] [2022-02-11 00:28:55,855 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:28:55,856 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-02-11 00:28:55,856 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:28:55,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-02-11 00:28:55,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=660, Unknown=0, NotChecked=0, Total=756 [2022-02-11 00:28:55,856 INFO L87 Difference]: Start difference. First operand 659 states and 1917 transitions. Second operand has 28 states, 28 states have (on average 1.5) internal successors, (42), 28 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:28:57,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:28:57,907 INFO L93 Difference]: Finished difference Result 932 states and 2395 transitions. [2022-02-11 00:28:57,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-02-11 00:28:57,908 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.5) internal successors, (42), 28 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-02-11 00:28:57,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:28:57,909 INFO L225 Difference]: With dead ends: 932 [2022-02-11 00:28:57,909 INFO L226 Difference]: Without dead ends: 850 [2022-02-11 00:28:57,909 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 750 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=513, Invalid=2679, Unknown=0, NotChecked=0, Total=3192 [2022-02-11 00:28:57,910 INFO L934 BasicCegarLoop]: 19 mSDtfsCounter, 188 mSDsluCounter, 769 mSDsCounter, 0 mSdLazyCounter, 1231 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 188 SdHoareTripleChecker+Valid, 431 SdHoareTripleChecker+Invalid, 1340 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 1231 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-11 00:28:57,910 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [188 Valid, 431 Invalid, 1340 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [109 Valid, 1231 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-11 00:28:57,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 850 states. [2022-02-11 00:28:57,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 850 to 657. [2022-02-11 00:28:57,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 657 states, 656 states have (on average 2.8978658536585367) internal successors, (1901), 656 states have internal predecessors, (1901), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:28:57,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 657 states to 657 states and 1901 transitions. [2022-02-11 00:28:57,917 INFO L78 Accepts]: Start accepts. Automaton has 657 states and 1901 transitions. Word has length 18 [2022-02-11 00:28:57,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:28:57,918 INFO L470 AbstractCegarLoop]: Abstraction has 657 states and 1901 transitions. [2022-02-11 00:28:57,918 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.5) internal successors, (42), 28 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:28:57,918 INFO L276 IsEmpty]: Start isEmpty. Operand 657 states and 1901 transitions. [2022-02-11 00:28:57,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-02-11 00:28:57,918 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:28:57,918 INFO L515 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:28:57,934 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (187)] Forceful destruction successful, exit code 0 [2022-02-11 00:28:58,119 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable194,187 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:28:58,119 INFO L402 AbstractCegarLoop]: === Iteration 196 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:28:58,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:28:58,119 INFO L85 PathProgramCache]: Analyzing trace with hash 873170055, now seen corresponding path program 187 times [2022-02-11 00:28:58,119 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:28:58,119 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1184150892] [2022-02-11 00:28:58,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:28:58,119 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:28:58,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:28:58,319 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:28:58,319 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:28:58,319 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1184150892] [2022-02-11 00:28:58,319 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1184150892] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:28:58,319 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2033968372] [2022-02-11 00:28:58,319 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-11 00:28:58,319 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:28:58,320 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:28:58,320 INFO L229 MonitoredProcess]: Starting monitored process 188 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:28:58,321 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (188)] Waiting until timeout for monitored process [2022-02-11 00:28:58,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:28:58,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 39 conjunts are in the unsatisfiable core [2022-02-11 00:28:58,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:28:58,731 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 93 treesize of output 77 [2022-02-11 00:28:58,733 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 77 treesize of output 61 [2022-02-11 00:28:58,975 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:28:58,975 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:28:59,419 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-02-11 00:28:59,419 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 119 treesize of output 100 [2022-02-11 00:28:59,422 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 95 treesize of output 71 [2022-02-11 00:28:59,515 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:28:59,515 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2033968372] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:28:59,515 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:28:59,515 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 11] total 27 [2022-02-11 00:28:59,515 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1798379535] [2022-02-11 00:28:59,515 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:28:59,515 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-11 00:28:59,515 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:28:59,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-11 00:28:59,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=625, Unknown=0, NotChecked=0, Total=702 [2022-02-11 00:28:59,516 INFO L87 Difference]: Start difference. First operand 657 states and 1901 transitions. Second operand has 27 states, 27 states have (on average 1.5185185185185186) internal successors, (41), 27 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) [2022-02-11 00:29:01,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:29:01,468 INFO L93 Difference]: Finished difference Result 870 states and 2272 transitions. [2022-02-11 00:29:01,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-02-11 00:29:01,468 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.5185185185185186) internal successors, (41), 27 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 18 [2022-02-11 00:29:01,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:29:01,470 INFO L225 Difference]: With dead ends: 870 [2022-02-11 00:29:01,470 INFO L226 Difference]: Without dead ends: 824 [2022-02-11 00:29:01,470 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 489 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=339, Invalid=2211, Unknown=0, NotChecked=0, Total=2550 [2022-02-11 00:29:01,470 INFO L934 BasicCegarLoop]: 14 mSDtfsCounter, 293 mSDsluCounter, 579 mSDsCounter, 0 mSdLazyCounter, 1037 mSolverCounterSat, 107 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 293 SdHoareTripleChecker+Valid, 315 SdHoareTripleChecker+Invalid, 1144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 107 IncrementalHoareTripleChecker+Valid, 1037 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-11 00:29:01,470 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [293 Valid, 315 Invalid, 1144 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [107 Valid, 1037 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-11 00:29:01,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 824 states. [2022-02-11 00:29:01,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 824 to 661. [2022-02-11 00:29:01,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 661 states, 660 states have (on average 2.9) internal successors, (1914), 660 states have internal predecessors, (1914), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:29:01,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 661 states to 661 states and 1914 transitions. [2022-02-11 00:29:01,478 INFO L78 Accepts]: Start accepts. Automaton has 661 states and 1914 transitions. Word has length 18 [2022-02-11 00:29:01,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:29:01,478 INFO L470 AbstractCegarLoop]: Abstraction has 661 states and 1914 transitions. [2022-02-11 00:29:01,478 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.5185185185185186) internal successors, (41), 27 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) [2022-02-11 00:29:01,478 INFO L276 IsEmpty]: Start isEmpty. Operand 661 states and 1914 transitions. [2022-02-11 00:29:01,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-02-11 00:29:01,479 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:29:01,479 INFO L515 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:29:01,495 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (188)] Ended with exit code 0 [2022-02-11 00:29:01,679 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable195,188 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:29:01,679 INFO L402 AbstractCegarLoop]: === Iteration 197 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:29:01,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:29:01,680 INFO L85 PathProgramCache]: Analyzing trace with hash 1758968335, now seen corresponding path program 188 times [2022-02-11 00:29:01,680 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:29:01,680 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [210005553] [2022-02-11 00:29:01,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:29:01,680 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:29:01,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:29:01,971 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:29:01,971 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:29:01,971 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [210005553] [2022-02-11 00:29:01,971 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [210005553] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:29:01,971 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [875440841] [2022-02-11 00:29:01,972 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-11 00:29:01,972 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:29:01,972 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:29:01,973 INFO L229 MonitoredProcess]: Starting monitored process 189 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:29:01,975 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (189)] Waiting until timeout for monitored process [2022-02-11 00:29:02,035 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-11 00:29:02,035 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:29:02,036 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 39 conjunts are in the unsatisfiable core [2022-02-11 00:29:02,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:29:02,411 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 95 treesize of output 79 [2022-02-11 00:29:02,413 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 79 treesize of output 63 [2022-02-11 00:29:02,624 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:29:02,624 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:29:03,135 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-02-11 00:29:03,135 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 119 treesize of output 100 [2022-02-11 00:29:03,138 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 95 treesize of output 71 [2022-02-11 00:29:03,253 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:29:03,253 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [875440841] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:29:03,253 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:29:03,253 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 30 [2022-02-11 00:29:03,253 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289977241] [2022-02-11 00:29:03,253 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:29:03,254 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-11 00:29:03,254 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:29:03,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-11 00:29:03,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=789, Unknown=0, NotChecked=0, Total=870 [2022-02-11 00:29:03,254 INFO L87 Difference]: Start difference. First operand 661 states and 1914 transitions. Second operand has 30 states, 30 states have (on average 1.4333333333333333) internal successors, (43), 30 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) [2022-02-11 00:29:06,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:29:06,338 INFO L93 Difference]: Finished difference Result 894 states and 2315 transitions. [2022-02-11 00:29:06,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-02-11 00:29:06,338 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.4333333333333333) internal successors, (43), 30 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 18 [2022-02-11 00:29:06,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:29:06,339 INFO L225 Difference]: With dead ends: 894 [2022-02-11 00:29:06,339 INFO L226 Difference]: Without dead ends: 849 [2022-02-11 00:29:06,340 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 627 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=436, Invalid=3224, Unknown=0, NotChecked=0, Total=3660 [2022-02-11 00:29:06,340 INFO L934 BasicCegarLoop]: 19 mSDtfsCounter, 298 mSDsluCounter, 848 mSDsCounter, 0 mSdLazyCounter, 1703 mSolverCounterSat, 129 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 298 SdHoareTripleChecker+Valid, 474 SdHoareTripleChecker+Invalid, 1832 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 129 IncrementalHoareTripleChecker+Valid, 1703 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-11 00:29:06,340 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [298 Valid, 474 Invalid, 1832 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [129 Valid, 1703 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-11 00:29:06,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 849 states. [2022-02-11 00:29:06,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 849 to 663. [2022-02-11 00:29:06,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 663 states, 662 states have (on average 2.894259818731118) internal successors, (1916), 662 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) [2022-02-11 00:29:06,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 663 states to 663 states and 1916 transitions. [2022-02-11 00:29:06,348 INFO L78 Accepts]: Start accepts. Automaton has 663 states and 1916 transitions. Word has length 18 [2022-02-11 00:29:06,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:29:06,348 INFO L470 AbstractCegarLoop]: Abstraction has 663 states and 1916 transitions. [2022-02-11 00:29:06,348 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.4333333333333333) internal successors, (43), 30 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) [2022-02-11 00:29:06,348 INFO L276 IsEmpty]: Start isEmpty. Operand 663 states and 1916 transitions. [2022-02-11 00:29:06,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-02-11 00:29:06,349 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:29:06,349 INFO L515 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:29:06,365 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (189)] Forceful destruction successful, exit code 0 [2022-02-11 00:29:06,564 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable196,189 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:29:06,565 INFO L402 AbstractCegarLoop]: === Iteration 198 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:29:06,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:29:06,565 INFO L85 PathProgramCache]: Analyzing trace with hash -739800121, now seen corresponding path program 189 times [2022-02-11 00:29:06,565 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:29:06,565 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [970758316] [2022-02-11 00:29:06,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:29:06,565 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:29:06,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:29:06,839 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:29:06,839 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:29:06,839 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [970758316] [2022-02-11 00:29:06,839 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [970758316] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:29:06,839 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [444946952] [2022-02-11 00:29:06,839 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-11 00:29:06,839 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:29:06,839 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:29:06,840 INFO L229 MonitoredProcess]: Starting monitored process 190 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:29:06,841 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (190)] Waiting until timeout for monitored process [2022-02-11 00:29:06,896 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-02-11 00:29:06,896 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:29:06,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2022-02-11 00:29:06,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:29:07,336 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 57 [2022-02-11 00:29:07,338 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 45 [2022-02-11 00:29:07,450 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:29:07,450 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:29:07,761 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-11 00:29:07,762 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 122 treesize of output 105 [2022-02-11 00:29:07,765 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 102 treesize of output 82 [2022-02-11 00:29:07,907 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:29:07,907 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [444946952] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:29:07,907 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:29:07,907 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 27 [2022-02-11 00:29:07,907 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [142298598] [2022-02-11 00:29:07,907 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:29:07,907 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-11 00:29:07,908 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:29:07,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-11 00:29:07,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=605, Unknown=0, NotChecked=0, Total=702 [2022-02-11 00:29:07,908 INFO L87 Difference]: Start difference. First operand 663 states and 1916 transitions. Second operand has 27 states, 27 states have (on average 1.4814814814814814) internal successors, (40), 27 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) [2022-02-11 00:29:09,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:29:09,225 INFO L93 Difference]: Finished difference Result 894 states and 2352 transitions. [2022-02-11 00:29:09,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-02-11 00:29:09,225 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.4814814814814814) internal successors, (40), 27 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 18 [2022-02-11 00:29:09,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:29:09,227 INFO L225 Difference]: With dead ends: 894 [2022-02-11 00:29:09,227 INFO L226 Difference]: Without dead ends: 869 [2022-02-11 00:29:09,227 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 409 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=308, Invalid=1762, Unknown=0, NotChecked=0, Total=2070 [2022-02-11 00:29:09,227 INFO L934 BasicCegarLoop]: 18 mSDtfsCounter, 211 mSDsluCounter, 736 mSDsCounter, 0 mSdLazyCounter, 1463 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 211 SdHoareTripleChecker+Valid, 398 SdHoareTripleChecker+Invalid, 1550 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 1463 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-11 00:29:09,227 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [211 Valid, 398 Invalid, 1550 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 1463 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-11 00:29:09,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 869 states. [2022-02-11 00:29:09,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 869 to 670. [2022-02-11 00:29:09,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 670 states, 669 states have (on average 2.898355754857997) internal successors, (1939), 669 states have internal predecessors, (1939), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:29:09,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 670 states to 670 states and 1939 transitions. [2022-02-11 00:29:09,236 INFO L78 Accepts]: Start accepts. Automaton has 670 states and 1939 transitions. Word has length 18 [2022-02-11 00:29:09,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:29:09,236 INFO L470 AbstractCegarLoop]: Abstraction has 670 states and 1939 transitions. [2022-02-11 00:29:09,236 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.4814814814814814) internal successors, (40), 27 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) [2022-02-11 00:29:09,236 INFO L276 IsEmpty]: Start isEmpty. Operand 670 states and 1939 transitions. [2022-02-11 00:29:09,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-02-11 00:29:09,237 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:29:09,237 INFO L515 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:29:09,253 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (190)] Forceful destruction successful, exit code 0 [2022-02-11 00:29:09,437 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable197,190 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:29:09,437 INFO L402 AbstractCegarLoop]: === Iteration 199 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:29:09,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:29:09,438 INFO L85 PathProgramCache]: Analyzing trace with hash 1339493707, now seen corresponding path program 190 times [2022-02-11 00:29:09,438 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:29:09,438 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [327244299] [2022-02-11 00:29:09,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:29:09,438 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:29:09,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:29:09,628 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:29:09,628 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:29:09,629 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [327244299] [2022-02-11 00:29:09,629 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [327244299] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:29:09,629 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [992364912] [2022-02-11 00:29:09,629 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-11 00:29:09,629 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:29:09,629 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:29:09,630 INFO L229 MonitoredProcess]: Starting monitored process 191 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:29:09,630 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (191)] Waiting until timeout for monitored process [2022-02-11 00:29:09,683 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-11 00:29:09,683 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:29:09,683 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 39 conjunts are in the unsatisfiable core [2022-02-11 00:29:09,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:29:09,962 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 99 treesize of output 83 [2022-02-11 00:29:09,964 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 83 treesize of output 67 [2022-02-11 00:29:10,176 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:29:10,176 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:29:10,457 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-11 00:29:10,457 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 109 treesize of output 96 [2022-02-11 00:29:10,461 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 93 treesize of output 77 [2022-02-11 00:29:10,608 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:29:10,608 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [992364912] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:29:10,608 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:29:10,608 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 28 [2022-02-11 00:29:10,608 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [728960929] [2022-02-11 00:29:10,609 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:29:10,609 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-02-11 00:29:10,609 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:29:10,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-02-11 00:29:10,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=660, Unknown=0, NotChecked=0, Total=756 [2022-02-11 00:29:10,609 INFO L87 Difference]: Start difference. First operand 670 states and 1939 transitions. Second operand has 28 states, 28 states have (on average 1.5) internal successors, (42), 28 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:29:12,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:29:12,143 INFO L93 Difference]: Finished difference Result 938 states and 2427 transitions. [2022-02-11 00:29:12,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-02-11 00:29:12,144 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.5) internal successors, (42), 28 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-02-11 00:29:12,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:29:12,145 INFO L225 Difference]: With dead ends: 938 [2022-02-11 00:29:12,145 INFO L226 Difference]: Without dead ends: 905 [2022-02-11 00:29:12,145 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 556 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=388, Invalid=2264, Unknown=0, NotChecked=0, Total=2652 [2022-02-11 00:29:12,145 INFO L934 BasicCegarLoop]: 16 mSDtfsCounter, 312 mSDsluCounter, 760 mSDsCounter, 0 mSdLazyCounter, 1444 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 312 SdHoareTripleChecker+Valid, 417 SdHoareTripleChecker+Invalid, 1553 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 1444 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-11 00:29:12,145 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [312 Valid, 417 Invalid, 1553 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [109 Valid, 1444 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-11 00:29:12,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 905 states. [2022-02-11 00:29:12,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 905 to 655. [2022-02-11 00:29:12,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 655 states, 654 states have (on average 2.885321100917431) internal successors, (1887), 654 states have internal predecessors, (1887), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:29:12,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 655 states to 655 states and 1887 transitions. [2022-02-11 00:29:12,154 INFO L78 Accepts]: Start accepts. Automaton has 655 states and 1887 transitions. Word has length 18 [2022-02-11 00:29:12,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:29:12,154 INFO L470 AbstractCegarLoop]: Abstraction has 655 states and 1887 transitions. [2022-02-11 00:29:12,154 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.5) internal successors, (42), 28 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:29:12,154 INFO L276 IsEmpty]: Start isEmpty. Operand 655 states and 1887 transitions. [2022-02-11 00:29:12,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-02-11 00:29:12,155 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:29:12,155 INFO L515 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:29:12,176 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (191)] Ended with exit code 0 [2022-02-11 00:29:12,355 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable198,191 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:29:12,355 INFO L402 AbstractCegarLoop]: === Iteration 200 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:29:12,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:29:12,355 INFO L85 PathProgramCache]: Analyzing trace with hash -809302829, now seen corresponding path program 191 times [2022-02-11 00:29:12,355 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:29:12,355 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1882263441] [2022-02-11 00:29:12,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:29:12,356 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:29:12,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:29:12,518 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:29:12,518 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:29:12,518 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1882263441] [2022-02-11 00:29:12,518 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1882263441] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:29:12,519 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1634382002] [2022-02-11 00:29:12,519 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-11 00:29:12,519 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:29:12,519 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:29:12,520 INFO L229 MonitoredProcess]: Starting monitored process 192 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:29:12,523 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (192)] Waiting until timeout for monitored process [2022-02-11 00:29:12,577 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-02-11 00:29:12,577 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:29:12,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2022-02-11 00:29:12,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:29:12,880 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 101 treesize of output 85 [2022-02-11 00:29:12,882 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 85 treesize of output 69 [2022-02-11 00:29:13,170 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:29:13,170 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:29:13,524 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-11 00:29:13,524 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 104 treesize of output 91 [2022-02-11 00:29:13,528 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 88 treesize of output 72 [2022-02-11 00:29:13,682 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:29:13,682 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1634382002] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:29:13,682 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:29:13,682 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 28 [2022-02-11 00:29:13,682 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [52733084] [2022-02-11 00:29:13,683 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:29:13,683 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-02-11 00:29:13,683 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:29:13,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-02-11 00:29:13,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=660, Unknown=0, NotChecked=0, Total=756 [2022-02-11 00:29:13,683 INFO L87 Difference]: Start difference. First operand 655 states and 1887 transitions. Second operand has 28 states, 28 states have (on average 1.5) internal successors, (42), 28 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:29:15,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:29:15,833 INFO L93 Difference]: Finished difference Result 976 states and 2506 transitions. [2022-02-11 00:29:15,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-02-11 00:29:15,833 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.5) internal successors, (42), 28 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-02-11 00:29:15,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:29:15,839 INFO L225 Difference]: With dead ends: 976 [2022-02-11 00:29:15,839 INFO L226 Difference]: Without dead ends: 920 [2022-02-11 00:29:15,839 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 761 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=460, Invalid=2846, Unknown=0, NotChecked=0, Total=3306 [2022-02-11 00:29:15,839 INFO L934 BasicCegarLoop]: 19 mSDtfsCounter, 263 mSDsluCounter, 815 mSDsCounter, 0 mSdLazyCounter, 1380 mSolverCounterSat, 140 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 263 SdHoareTripleChecker+Valid, 451 SdHoareTripleChecker+Invalid, 1520 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 140 IncrementalHoareTripleChecker+Valid, 1380 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-11 00:29:15,839 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [263 Valid, 451 Invalid, 1520 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [140 Valid, 1380 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-11 00:29:15,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 920 states. [2022-02-11 00:29:15,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 920 to 651. [2022-02-11 00:29:15,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 651 states, 650 states have (on average 2.88) internal successors, (1872), 650 states have internal predecessors, (1872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:29:15,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 651 states to 651 states and 1872 transitions. [2022-02-11 00:29:15,847 INFO L78 Accepts]: Start accepts. Automaton has 651 states and 1872 transitions. Word has length 18 [2022-02-11 00:29:15,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:29:15,847 INFO L470 AbstractCegarLoop]: Abstraction has 651 states and 1872 transitions. [2022-02-11 00:29:15,847 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.5) internal successors, (42), 28 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:29:15,847 INFO L276 IsEmpty]: Start isEmpty. Operand 651 states and 1872 transitions. [2022-02-11 00:29:15,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-02-11 00:29:15,848 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:29:15,848 INFO L515 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:29:15,864 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (192)] Forceful destruction successful, exit code 0 [2022-02-11 00:29:16,049 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable199,192 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:29:16,049 INFO L402 AbstractCegarLoop]: === Iteration 201 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:29:16,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:29:16,050 INFO L85 PathProgramCache]: Analyzing trace with hash 1297481291, now seen corresponding path program 192 times [2022-02-11 00:29:16,050 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:29:16,050 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2101102076] [2022-02-11 00:29:16,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:29:16,050 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:29:16,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:29:16,270 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:29:16,270 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:29:16,270 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2101102076] [2022-02-11 00:29:16,270 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2101102076] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:29:16,270 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [408844313] [2022-02-11 00:29:16,270 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-11 00:29:16,271 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:29:16,271 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:29:16,272 INFO L229 MonitoredProcess]: Starting monitored process 193 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:29:16,272 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (193)] Waiting until timeout for monitored process [2022-02-11 00:29:16,329 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-11 00:29:16,329 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:29:16,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2022-02-11 00:29:16,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:29:16,667 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 99 treesize of output 83 [2022-02-11 00:29:16,670 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 83 treesize of output 67 [2022-02-11 00:29:16,950 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:29:16,950 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:29:17,441 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-02-11 00:29:17,441 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 130 treesize of output 107 [2022-02-11 00:29:17,445 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 102 treesize of output 74 [2022-02-11 00:29:17,575 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:29:17,575 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [408844313] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:29:17,576 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:29:17,576 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 28 [2022-02-11 00:29:17,576 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1469049522] [2022-02-11 00:29:17,576 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:29:17,576 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-02-11 00:29:17,576 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:29:17,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-02-11 00:29:17,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=662, Unknown=0, NotChecked=0, Total=756 [2022-02-11 00:29:17,576 INFO L87 Difference]: Start difference. First operand 651 states and 1872 transitions. Second operand has 28 states, 28 states have (on average 1.5) internal successors, (42), 28 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:29:19,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:29:19,709 INFO L93 Difference]: Finished difference Result 886 states and 2314 transitions. [2022-02-11 00:29:19,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-02-11 00:29:19,709 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.5) internal successors, (42), 28 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-02-11 00:29:19,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:29:19,711 INFO L225 Difference]: With dead ends: 886 [2022-02-11 00:29:19,711 INFO L226 Difference]: Without dead ends: 833 [2022-02-11 00:29:19,711 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 738 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=479, Invalid=2713, Unknown=0, NotChecked=0, Total=3192 [2022-02-11 00:29:19,711 INFO L934 BasicCegarLoop]: 22 mSDtfsCounter, 324 mSDsluCounter, 743 mSDsCounter, 0 mSdLazyCounter, 1219 mSolverCounterSat, 140 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 324 SdHoareTripleChecker+Valid, 400 SdHoareTripleChecker+Invalid, 1359 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 140 IncrementalHoareTripleChecker+Valid, 1219 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-11 00:29:19,711 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [324 Valid, 400 Invalid, 1359 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [140 Valid, 1219 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-11 00:29:19,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 833 states. [2022-02-11 00:29:19,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 833 to 656. [2022-02-11 00:29:19,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 656 states, 655 states have (on average 2.880916030534351) internal successors, (1887), 655 states have internal predecessors, (1887), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:29:19,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 656 states to 656 states and 1887 transitions. [2022-02-11 00:29:19,718 INFO L78 Accepts]: Start accepts. Automaton has 656 states and 1887 transitions. Word has length 18 [2022-02-11 00:29:19,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:29:19,719 INFO L470 AbstractCegarLoop]: Abstraction has 656 states and 1887 transitions. [2022-02-11 00:29:19,719 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.5) internal successors, (42), 28 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:29:19,719 INFO L276 IsEmpty]: Start isEmpty. Operand 656 states and 1887 transitions. [2022-02-11 00:29:19,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-02-11 00:29:19,719 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:29:19,719 INFO L515 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:29:19,736 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (193)] Forceful destruction successful, exit code 0 [2022-02-11 00:29:19,920 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 193 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable200 [2022-02-11 00:29:19,920 INFO L402 AbstractCegarLoop]: === Iteration 202 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:29:19,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:29:19,920 INFO L85 PathProgramCache]: Analyzing trace with hash -2111687725, now seen corresponding path program 193 times [2022-02-11 00:29:19,920 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:29:19,920 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [114780969] [2022-02-11 00:29:19,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:29:19,920 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:29:19,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:29:20,118 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:29:20,119 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:29:20,119 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [114780969] [2022-02-11 00:29:20,119 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [114780969] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:29:20,119 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [621465429] [2022-02-11 00:29:20,119 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-11 00:29:20,119 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:29:20,119 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:29:20,120 INFO L229 MonitoredProcess]: Starting monitored process 194 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:29:20,120 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (194)] Waiting until timeout for monitored process [2022-02-11 00:29:20,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:29:20,182 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 39 conjunts are in the unsatisfiable core [2022-02-11 00:29:20,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:29:20,541 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 95 treesize of output 79 [2022-02-11 00:29:20,544 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 79 treesize of output 63 [2022-02-11 00:29:20,788 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:29:20,788 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:29:21,204 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-02-11 00:29:21,204 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 122 treesize of output 103 [2022-02-11 00:29:21,207 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 98 treesize of output 74 [2022-02-11 00:29:21,315 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:29:21,316 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [621465429] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:29:21,316 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:29:21,316 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 30 [2022-02-11 00:29:21,316 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1506514041] [2022-02-11 00:29:21,316 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:29:21,316 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-11 00:29:21,316 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:29:21,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-11 00:29:21,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=789, Unknown=0, NotChecked=0, Total=870 [2022-02-11 00:29:21,316 INFO L87 Difference]: Start difference. First operand 656 states and 1887 transitions. Second operand has 30 states, 30 states have (on average 1.4333333333333333) internal successors, (43), 30 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) [2022-02-11 00:29:23,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:29:23,180 INFO L93 Difference]: Finished difference Result 841 states and 2218 transitions. [2022-02-11 00:29:23,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-02-11 00:29:23,184 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.4333333333333333) internal successors, (43), 30 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 18 [2022-02-11 00:29:23,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:29:23,185 INFO L225 Difference]: With dead ends: 841 [2022-02-11 00:29:23,185 INFO L226 Difference]: Without dead ends: 793 [2022-02-11 00:29:23,185 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 414 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=324, Invalid=2432, Unknown=0, NotChecked=0, Total=2756 [2022-02-11 00:29:23,185 INFO L934 BasicCegarLoop]: 20 mSDtfsCounter, 304 mSDsluCounter, 737 mSDsCounter, 0 mSdLazyCounter, 1250 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 304 SdHoareTripleChecker+Valid, 393 SdHoareTripleChecker+Invalid, 1359 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 1250 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-11 00:29:23,185 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [304 Valid, 393 Invalid, 1359 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [109 Valid, 1250 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-11 00:29:23,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 793 states. [2022-02-11 00:29:23,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 793 to 656. [2022-02-11 00:29:23,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 656 states, 655 states have (on average 2.880916030534351) internal successors, (1887), 655 states have internal predecessors, (1887), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:29:23,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 656 states to 656 states and 1887 transitions. [2022-02-11 00:29:23,193 INFO L78 Accepts]: Start accepts. Automaton has 656 states and 1887 transitions. Word has length 18 [2022-02-11 00:29:23,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:29:23,193 INFO L470 AbstractCegarLoop]: Abstraction has 656 states and 1887 transitions. [2022-02-11 00:29:23,193 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.4333333333333333) internal successors, (43), 30 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) [2022-02-11 00:29:23,193 INFO L276 IsEmpty]: Start isEmpty. Operand 656 states and 1887 transitions. [2022-02-11 00:29:23,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-02-11 00:29:23,194 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:29:23,194 INFO L515 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:29:23,209 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (194)] Ended with exit code 0 [2022-02-11 00:29:23,394 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 194 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable201 [2022-02-11 00:29:23,394 INFO L402 AbstractCegarLoop]: === Iteration 203 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:29:23,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:29:23,395 INFO L85 PathProgramCache]: Analyzing trace with hash -1266716273, now seen corresponding path program 194 times [2022-02-11 00:29:23,395 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:29:23,395 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1425876179] [2022-02-11 00:29:23,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:29:23,395 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:29:23,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:29:23,620 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:29:23,621 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:29:23,621 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1425876179] [2022-02-11 00:29:23,621 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1425876179] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:29:23,621 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [949496177] [2022-02-11 00:29:23,621 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-11 00:29:23,621 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:29:23,621 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:29:23,622 INFO L229 MonitoredProcess]: Starting monitored process 195 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:29:23,622 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (195)] Waiting until timeout for monitored process [2022-02-11 00:29:23,676 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-11 00:29:23,676 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:29:23,677 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2022-02-11 00:29:23,677 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:29:24,059 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 101 treesize of output 85 [2022-02-11 00:29:24,061 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 85 treesize of output 69 [2022-02-11 00:29:24,351 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:29:24,352 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:29:24,939 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-11 00:29:24,939 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 93 treesize of output 80 [2022-02-11 00:29:24,943 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 77 treesize of output 61 [2022-02-11 00:29:25,042 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:29:25,043 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [949496177] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:29:25,043 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:29:25,043 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 30 [2022-02-11 00:29:25,043 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031502960] [2022-02-11 00:29:25,043 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:29:25,043 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-11 00:29:25,043 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:29:25,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-11 00:29:25,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=772, Unknown=0, NotChecked=0, Total=870 [2022-02-11 00:29:25,044 INFO L87 Difference]: Start difference. First operand 656 states and 1887 transitions. Second operand has 30 states, 30 states have (on average 1.4333333333333333) internal successors, (43), 30 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) [2022-02-11 00:29:28,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:29:28,859 INFO L93 Difference]: Finished difference Result 1088 states and 2976 transitions. [2022-02-11 00:29:28,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-02-11 00:29:28,859 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.4333333333333333) internal successors, (43), 30 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 18 [2022-02-11 00:29:28,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:29:28,861 INFO L225 Difference]: With dead ends: 1088 [2022-02-11 00:29:28,861 INFO L226 Difference]: Without dead ends: 1006 [2022-02-11 00:29:28,861 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 823 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=836, Invalid=3586, Unknown=0, NotChecked=0, Total=4422 [2022-02-11 00:29:28,861 INFO L934 BasicCegarLoop]: 22 mSDtfsCounter, 287 mSDsluCounter, 763 mSDsCounter, 0 mSdLazyCounter, 1301 mSolverCounterSat, 135 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 287 SdHoareTripleChecker+Valid, 382 SdHoareTripleChecker+Invalid, 1436 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 135 IncrementalHoareTripleChecker+Valid, 1301 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-11 00:29:28,861 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [287 Valid, 382 Invalid, 1436 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [135 Valid, 1301 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-11 00:29:28,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1006 states. [2022-02-11 00:29:28,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1006 to 661. [2022-02-11 00:29:28,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 661 states, 660 states have (on average 2.8772727272727274) internal successors, (1899), 660 states have internal predecessors, (1899), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:29:28,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 661 states to 661 states and 1899 transitions. [2022-02-11 00:29:28,874 INFO L78 Accepts]: Start accepts. Automaton has 661 states and 1899 transitions. Word has length 18 [2022-02-11 00:29:28,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:29:28,874 INFO L470 AbstractCegarLoop]: Abstraction has 661 states and 1899 transitions. [2022-02-11 00:29:28,874 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.4333333333333333) internal successors, (43), 30 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) [2022-02-11 00:29:28,874 INFO L276 IsEmpty]: Start isEmpty. Operand 661 states and 1899 transitions. [2022-02-11 00:29:28,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-02-11 00:29:28,875 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:29:28,875 INFO L515 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:29:28,891 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (195)] Forceful destruction successful, exit code 0 [2022-02-11 00:29:29,075 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 195 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable202 [2022-02-11 00:29:29,076 INFO L402 AbstractCegarLoop]: === Iteration 204 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:29:29,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:29:29,076 INFO L85 PathProgramCache]: Analyzing trace with hash -1332907849, now seen corresponding path program 195 times [2022-02-11 00:29:29,076 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:29:29,076 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2009744165] [2022-02-11 00:29:29,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:29:29,076 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:29:29,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:29:29,186 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:29:29,186 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:29:29,186 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2009744165] [2022-02-11 00:29:29,186 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2009744165] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:29:29,186 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [591403775] [2022-02-11 00:29:29,186 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-11 00:29:29,186 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:29:29,186 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:29:29,187 INFO L229 MonitoredProcess]: Starting monitored process 196 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:29:29,188 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (196)] Waiting until timeout for monitored process [2022-02-11 00:29:29,246 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-11 00:29:29,246 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:29:29,247 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 39 conjunts are in the unsatisfiable core [2022-02-11 00:29:29,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:29:29,524 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:29:29,524 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:29:29,734 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-11 00:29:29,734 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 30 treesize of output 25 [2022-02-11 00:29:29,802 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:29:29,803 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [591403775] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:29:29,803 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:29:29,803 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 12] total 28 [2022-02-11 00:29:29,803 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [723445987] [2022-02-11 00:29:29,803 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:29:29,803 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-02-11 00:29:29,803 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:29:29,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-02-11 00:29:29,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=656, Unknown=0, NotChecked=0, Total=756 [2022-02-11 00:29:29,803 INFO L87 Difference]: Start difference. First operand 661 states and 1899 transitions. Second operand has 28 states, 28 states have (on average 1.4285714285714286) internal successors, (40), 28 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) [2022-02-11 00:29:30,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:29:30,557 INFO L93 Difference]: Finished difference Result 920 states and 2574 transitions. [2022-02-11 00:29:30,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-02-11 00:29:30,558 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.4285714285714286) internal successors, (40), 28 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 19 [2022-02-11 00:29:30,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:29:30,559 INFO L225 Difference]: With dead ends: 920 [2022-02-11 00:29:30,559 INFO L226 Difference]: Without dead ends: 920 [2022-02-11 00:29:30,559 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 347 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=332, Invalid=1560, Unknown=0, NotChecked=0, Total=1892 [2022-02-11 00:29:30,559 INFO L934 BasicCegarLoop]: 22 mSDtfsCounter, 194 mSDsluCounter, 569 mSDsCounter, 0 mSdLazyCounter, 799 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 194 SdHoareTripleChecker+Valid, 275 SdHoareTripleChecker+Invalid, 840 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 799 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-11 00:29:30,559 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [194 Valid, 275 Invalid, 840 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 799 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-11 00:29:30,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 920 states. [2022-02-11 00:29:30,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 920 to 660. [2022-02-11 00:29:30,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 660 states, 659 states have (on average 2.8770864946889225) internal successors, (1896), 659 states have internal predecessors, (1896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:29:30,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 660 states to 660 states and 1896 transitions. [2022-02-11 00:29:30,568 INFO L78 Accepts]: Start accepts. Automaton has 660 states and 1896 transitions. Word has length 19 [2022-02-11 00:29:30,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:29:30,568 INFO L470 AbstractCegarLoop]: Abstraction has 660 states and 1896 transitions. [2022-02-11 00:29:30,568 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.4285714285714286) internal successors, (40), 28 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) [2022-02-11 00:29:30,568 INFO L276 IsEmpty]: Start isEmpty. Operand 660 states and 1896 transitions. [2022-02-11 00:29:30,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-02-11 00:29:30,569 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:29:30,569 INFO L515 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:29:30,585 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (196)] Ended with exit code 0 [2022-02-11 00:29:30,769 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable203,196 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:29:30,769 INFO L402 AbstractCegarLoop]: === Iteration 205 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:29:30,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:29:30,770 INFO L85 PathProgramCache]: Analyzing trace with hash -1520066201, now seen corresponding path program 196 times [2022-02-11 00:29:30,770 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:29:30,770 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1776059340] [2022-02-11 00:29:30,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:29:30,770 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:29:30,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:29:30,897 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:29:30,897 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:29:30,897 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1776059340] [2022-02-11 00:29:30,897 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1776059340] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:29:30,897 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1944954057] [2022-02-11 00:29:30,897 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-11 00:29:30,897 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:29:30,897 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:29:30,898 INFO L229 MonitoredProcess]: Starting monitored process 197 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:29:30,899 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (197)] Waiting until timeout for monitored process [2022-02-11 00:29:30,955 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-11 00:29:30,955 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:29:30,956 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-11 00:29:30,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:29:31,241 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:29:31,241 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:29:31,449 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-11 00:29:31,449 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 31 treesize of output 26 [2022-02-11 00:29:31,487 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:29:31,488 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1944954057] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:29:31,488 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:29:31,488 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 27 [2022-02-11 00:29:31,488 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81981169] [2022-02-11 00:29:31,488 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:29:31,488 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-11 00:29:31,488 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:29:31,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-11 00:29:31,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=622, Unknown=0, NotChecked=0, Total=702 [2022-02-11 00:29:31,488 INFO L87 Difference]: Start difference. First operand 660 states and 1896 transitions. Second operand has 27 states, 27 states have (on average 1.5185185185185186) internal successors, (41), 27 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) [2022-02-11 00:29:32,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:29:32,173 INFO L93 Difference]: Finished difference Result 810 states and 2243 transitions. [2022-02-11 00:29:32,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-02-11 00:29:32,173 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.5185185185185186) internal successors, (41), 27 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 19 [2022-02-11 00:29:32,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:29:32,175 INFO L225 Difference]: With dead ends: 810 [2022-02-11 00:29:32,175 INFO L226 Difference]: Without dead ends: 810 [2022-02-11 00:29:32,175 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=195, Invalid=1445, Unknown=0, NotChecked=0, Total=1640 [2022-02-11 00:29:32,175 INFO L934 BasicCegarLoop]: 17 mSDtfsCounter, 127 mSDsluCounter, 469 mSDsCounter, 0 mSdLazyCounter, 768 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 263 SdHoareTripleChecker+Invalid, 808 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 768 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-11 00:29:32,175 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [127 Valid, 263 Invalid, 808 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 768 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-11 00:29:32,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 810 states. [2022-02-11 00:29:32,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 810 to 660. [2022-02-11 00:29:32,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 660 states, 659 states have (on average 2.8770864946889225) internal successors, (1896), 659 states have internal predecessors, (1896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:29:32,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 660 states to 660 states and 1896 transitions. [2022-02-11 00:29:32,197 INFO L78 Accepts]: Start accepts. Automaton has 660 states and 1896 transitions. Word has length 19 [2022-02-11 00:29:32,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:29:32,198 INFO L470 AbstractCegarLoop]: Abstraction has 660 states and 1896 transitions. [2022-02-11 00:29:32,198 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.5185185185185186) internal successors, (41), 27 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) [2022-02-11 00:29:32,198 INFO L276 IsEmpty]: Start isEmpty. Operand 660 states and 1896 transitions. [2022-02-11 00:29:32,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-02-11 00:29:32,204 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:29:32,204 INFO L515 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:29:32,221 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (197)] Forceful destruction successful, exit code 0 [2022-02-11 00:29:32,419 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable204,197 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:29:32,419 INFO L402 AbstractCegarLoop]: === Iteration 206 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:29:32,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:29:32,420 INFO L85 PathProgramCache]: Analyzing trace with hash -2036397077, now seen corresponding path program 197 times [2022-02-11 00:29:32,420 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:29:32,420 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1044179073] [2022-02-11 00:29:32,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:29:32,420 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:29:32,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:29:32,537 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:29:32,538 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:29:32,538 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1044179073] [2022-02-11 00:29:32,538 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1044179073] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:29:32,538 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1209461224] [2022-02-11 00:29:32,538 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-11 00:29:32,538 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:29:32,538 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:29:32,539 INFO L229 MonitoredProcess]: Starting monitored process 198 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:29:32,539 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (198)] Waiting until timeout for monitored process [2022-02-11 00:29:32,599 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-11 00:29:32,599 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:29:32,599 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-11 00:29:32,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:29:32,981 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 49 [2022-02-11 00:29:32,983 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 37 [2022-02-11 00:29:33,001 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:29:33,001 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:29:33,137 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-11 00:29:33,137 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 69 treesize of output 60 [2022-02-11 00:29:33,140 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 34 [2022-02-11 00:29:33,205 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:29:33,205 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1209461224] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:29:33,205 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:29:33,205 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-02-11 00:29:33,205 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1134123658] [2022-02-11 00:29:33,205 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:29:33,205 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-02-11 00:29:33,205 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:29:33,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-02-11 00:29:33,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=477, Unknown=0, NotChecked=0, Total=552 [2022-02-11 00:29:33,206 INFO L87 Difference]: Start difference. First operand 660 states and 1896 transitions. Second operand has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:29:33,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:29:33,839 INFO L93 Difference]: Finished difference Result 781 states and 2178 transitions. [2022-02-11 00:29:33,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-11 00:29:33,840 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-02-11 00:29:33,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:29:33,841 INFO L225 Difference]: With dead ends: 781 [2022-02-11 00:29:33,841 INFO L226 Difference]: Without dead ends: 775 [2022-02-11 00:29:33,841 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=179, Invalid=943, Unknown=0, NotChecked=0, Total=1122 [2022-02-11 00:29:33,841 INFO L934 BasicCegarLoop]: 18 mSDtfsCounter, 102 mSDsluCounter, 471 mSDsCounter, 0 mSdLazyCounter, 634 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 247 SdHoareTripleChecker+Invalid, 649 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 634 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-11 00:29:33,841 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [102 Valid, 247 Invalid, 649 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 634 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-11 00:29:33,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 775 states. [2022-02-11 00:29:33,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 775 to 660. [2022-02-11 00:29:33,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 660 states, 659 states have (on average 2.87556904400607) internal successors, (1895), 659 states have internal predecessors, (1895), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:29:33,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 660 states to 660 states and 1895 transitions. [2022-02-11 00:29:33,849 INFO L78 Accepts]: Start accepts. Automaton has 660 states and 1895 transitions. Word has length 19 [2022-02-11 00:29:33,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:29:33,849 INFO L470 AbstractCegarLoop]: Abstraction has 660 states and 1895 transitions. [2022-02-11 00:29:33,849 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:29:33,849 INFO L276 IsEmpty]: Start isEmpty. Operand 660 states and 1895 transitions. [2022-02-11 00:29:33,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-02-11 00:29:33,850 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:29:33,850 INFO L515 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:29:33,866 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (198)] Forceful destruction successful, exit code 0 [2022-02-11 00:29:34,050 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 198 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable205 [2022-02-11 00:29:34,050 INFO L402 AbstractCegarLoop]: === Iteration 207 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:29:34,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:29:34,051 INFO L85 PathProgramCache]: Analyzing trace with hash 407308147, now seen corresponding path program 198 times [2022-02-11 00:29:34,051 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:29:34,051 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1986810253] [2022-02-11 00:29:34,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:29:34,051 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:29:34,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:29:34,176 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:29:34,177 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:29:34,177 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1986810253] [2022-02-11 00:29:34,177 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1986810253] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:29:34,177 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [168823827] [2022-02-11 00:29:34,177 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-11 00:29:34,177 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:29:34,177 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:29:34,178 INFO L229 MonitoredProcess]: Starting monitored process 199 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:29:34,178 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (199)] Waiting until timeout for monitored process [2022-02-11 00:29:34,233 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-11 00:29:34,234 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:29:34,234 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-11 00:29:34,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:29:34,558 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:29:34,558 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:29:34,773 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-11 00:29:34,773 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 30 treesize of output 25 [2022-02-11 00:29:34,814 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:29:34,814 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [168823827] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:29:34,814 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:29:34,814 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 27 [2022-02-11 00:29:34,814 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [104030165] [2022-02-11 00:29:34,814 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:29:34,814 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-11 00:29:34,814 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:29:34,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-11 00:29:34,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=621, Unknown=0, NotChecked=0, Total=702 [2022-02-11 00:29:34,815 INFO L87 Difference]: Start difference. First operand 660 states and 1895 transitions. Second operand has 27 states, 27 states have (on average 1.5185185185185186) internal successors, (41), 27 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) [2022-02-11 00:29:35,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:29:35,579 INFO L93 Difference]: Finished difference Result 804 states and 2227 transitions. [2022-02-11 00:29:35,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-02-11 00:29:35,579 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.5185185185185186) internal successors, (41), 27 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 19 [2022-02-11 00:29:35,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:29:35,585 INFO L225 Difference]: With dead ends: 804 [2022-02-11 00:29:35,585 INFO L226 Difference]: Without dead ends: 804 [2022-02-11 00:29:35,586 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 278 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=216, Invalid=1590, Unknown=0, NotChecked=0, Total=1806 [2022-02-11 00:29:35,586 INFO L934 BasicCegarLoop]: 17 mSDtfsCounter, 124 mSDsluCounter, 498 mSDsCounter, 0 mSdLazyCounter, 810 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 295 SdHoareTripleChecker+Invalid, 850 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 810 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-11 00:29:35,586 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [124 Valid, 295 Invalid, 850 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 810 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-11 00:29:35,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 804 states. [2022-02-11 00:29:35,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 804 to 660. [2022-02-11 00:29:35,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 660 states, 659 states have (on average 2.87556904400607) internal successors, (1895), 659 states have internal predecessors, (1895), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:29:35,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 660 states to 660 states and 1895 transitions. [2022-02-11 00:29:35,594 INFO L78 Accepts]: Start accepts. Automaton has 660 states and 1895 transitions. Word has length 19 [2022-02-11 00:29:35,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:29:35,594 INFO L470 AbstractCegarLoop]: Abstraction has 660 states and 1895 transitions. [2022-02-11 00:29:35,594 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.5185185185185186) internal successors, (41), 27 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) [2022-02-11 00:29:35,594 INFO L276 IsEmpty]: Start isEmpty. Operand 660 states and 1895 transitions. [2022-02-11 00:29:35,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-02-11 00:29:35,595 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:29:35,595 INFO L515 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:29:35,611 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (199)] Forceful destruction successful, exit code 0 [2022-02-11 00:29:35,795 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 199 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable206 [2022-02-11 00:29:35,795 INFO L402 AbstractCegarLoop]: === Iteration 208 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:29:35,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:29:35,796 INFO L85 PathProgramCache]: Analyzing trace with hash -994821009, now seen corresponding path program 199 times [2022-02-11 00:29:35,796 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:29:35,796 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [938434305] [2022-02-11 00:29:35,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:29:35,796 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:29:35,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:29:35,919 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:29:35,919 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:29:35,919 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [938434305] [2022-02-11 00:29:35,919 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [938434305] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:29:35,919 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [998326836] [2022-02-11 00:29:35,919 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-11 00:29:35,919 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:29:35,919 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:29:35,920 INFO L229 MonitoredProcess]: Starting monitored process 200 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:29:35,921 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (200)] Waiting until timeout for monitored process [2022-02-11 00:29:35,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:29:35,977 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-11 00:29:35,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:29:36,353 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 49 [2022-02-11 00:29:36,355 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 37 [2022-02-11 00:29:36,374 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:29:36,374 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:29:36,529 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-11 00:29:36,529 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 65 treesize of output 56 [2022-02-11 00:29:36,532 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 34 [2022-02-11 00:29:36,592 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:29:36,592 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [998326836] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:29:36,592 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:29:36,593 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-02-11 00:29:36,593 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1103480425] [2022-02-11 00:29:36,593 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:29:36,593 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-11 00:29:36,593 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:29:36,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-11 00:29:36,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=519, Unknown=0, NotChecked=0, Total=600 [2022-02-11 00:29:36,593 INFO L87 Difference]: Start difference. First operand 660 states and 1895 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 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) [2022-02-11 00:29:37,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:29:37,407 INFO L93 Difference]: Finished difference Result 811 states and 2226 transitions. [2022-02-11 00:29:37,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-11 00:29:37,407 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 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 19 [2022-02-11 00:29:37,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:29:37,408 INFO L225 Difference]: With dead ends: 811 [2022-02-11 00:29:37,408 INFO L226 Difference]: Without dead ends: 807 [2022-02-11 00:29:37,408 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=214, Invalid=1118, Unknown=0, NotChecked=0, Total=1332 [2022-02-11 00:29:37,409 INFO L934 BasicCegarLoop]: 19 mSDtfsCounter, 240 mSDsluCounter, 347 mSDsCounter, 0 mSdLazyCounter, 534 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 240 SdHoareTripleChecker+Valid, 199 SdHoareTripleChecker+Invalid, 554 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 534 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-11 00:29:37,409 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [240 Valid, 199 Invalid, 554 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 534 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-11 00:29:37,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 807 states. [2022-02-11 00:29:37,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 807 to 666. [2022-02-11 00:29:37,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 666 states, 665 states have (on average 2.8721804511278197) internal successors, (1910), 665 states have internal predecessors, (1910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:29:37,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 666 states to 666 states and 1910 transitions. [2022-02-11 00:29:37,417 INFO L78 Accepts]: Start accepts. Automaton has 666 states and 1910 transitions. Word has length 19 [2022-02-11 00:29:37,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:29:37,417 INFO L470 AbstractCegarLoop]: Abstraction has 666 states and 1910 transitions. [2022-02-11 00:29:37,417 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 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) [2022-02-11 00:29:37,417 INFO L276 IsEmpty]: Start isEmpty. Operand 666 states and 1910 transitions. [2022-02-11 00:29:37,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-02-11 00:29:37,417 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:29:37,418 INFO L515 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:29:37,434 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (200)] Forceful destruction successful, exit code 0 [2022-02-11 00:29:37,618 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable207,200 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:29:37,618 INFO L402 AbstractCegarLoop]: === Iteration 209 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:29:37,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:29:37,618 INFO L85 PathProgramCache]: Analyzing trace with hash -1747275801, now seen corresponding path program 200 times [2022-02-11 00:29:37,618 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:29:37,618 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1923465290] [2022-02-11 00:29:37,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:29:37,619 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:29:37,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:29:37,737 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:29:37,738 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:29:37,738 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1923465290] [2022-02-11 00:29:37,738 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1923465290] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:29:37,738 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1086212251] [2022-02-11 00:29:37,738 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-11 00:29:37,738 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:29:37,738 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:29:37,739 INFO L229 MonitoredProcess]: Starting monitored process 201 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:29:37,739 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (201)] Waiting until timeout for monitored process [2022-02-11 00:29:37,795 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-11 00:29:37,795 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:29:37,796 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-11 00:29:37,796 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:29:38,129 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:29:38,129 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:29:38,358 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-11 00:29:38,358 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 31 treesize of output 26 [2022-02-11 00:29:38,397 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:29:38,397 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1086212251] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:29:38,397 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:29:38,397 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 27 [2022-02-11 00:29:38,397 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1977776668] [2022-02-11 00:29:38,397 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:29:38,397 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-11 00:29:38,397 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:29:38,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-11 00:29:38,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=619, Unknown=0, NotChecked=0, Total=702 [2022-02-11 00:29:38,398 INFO L87 Difference]: Start difference. First operand 666 states and 1910 transitions. Second operand has 27 states, 27 states have (on average 1.5185185185185186) internal successors, (41), 27 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) [2022-02-11 00:29:39,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:29:39,090 INFO L93 Difference]: Finished difference Result 808 states and 2239 transitions. [2022-02-11 00:29:39,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-02-11 00:29:39,091 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.5185185185185186) internal successors, (41), 27 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 19 [2022-02-11 00:29:39,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:29:39,092 INFO L225 Difference]: With dead ends: 808 [2022-02-11 00:29:39,092 INFO L226 Difference]: Without dead ends: 808 [2022-02-11 00:29:39,092 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 296 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=229, Invalid=1663, Unknown=0, NotChecked=0, Total=1892 [2022-02-11 00:29:39,092 INFO L934 BasicCegarLoop]: 16 mSDtfsCounter, 131 mSDsluCounter, 350 mSDsCounter, 0 mSdLazyCounter, 624 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 199 SdHoareTripleChecker+Invalid, 677 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 624 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-11 00:29:39,092 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [131 Valid, 199 Invalid, 677 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 624 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-11 00:29:39,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 808 states. [2022-02-11 00:29:39,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 808 to 666. [2022-02-11 00:29:39,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 666 states, 665 states have (on average 2.8721804511278197) internal successors, (1910), 665 states have internal predecessors, (1910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:29:39,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 666 states to 666 states and 1910 transitions. [2022-02-11 00:29:39,100 INFO L78 Accepts]: Start accepts. Automaton has 666 states and 1910 transitions. Word has length 19 [2022-02-11 00:29:39,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:29:39,100 INFO L470 AbstractCegarLoop]: Abstraction has 666 states and 1910 transitions. [2022-02-11 00:29:39,100 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.5185185185185186) internal successors, (41), 27 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) [2022-02-11 00:29:39,100 INFO L276 IsEmpty]: Start isEmpty. Operand 666 states and 1910 transitions. [2022-02-11 00:29:39,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-02-11 00:29:39,100 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:29:39,101 INFO L515 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:29:39,116 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (201)] Ended with exit code 0 [2022-02-11 00:29:39,301 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 201 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable208 [2022-02-11 00:29:39,301 INFO L402 AbstractCegarLoop]: === Iteration 210 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:29:39,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:29:39,301 INFO L85 PathProgramCache]: Analyzing trace with hash -961221781, now seen corresponding path program 201 times [2022-02-11 00:29:39,301 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:29:39,301 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1652474835] [2022-02-11 00:29:39,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:29:39,302 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:29:39,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:29:39,423 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:29:39,423 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:29:39,424 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1652474835] [2022-02-11 00:29:39,424 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1652474835] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:29:39,424 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1456870534] [2022-02-11 00:29:39,424 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-11 00:29:39,424 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:29:39,424 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:29:39,425 INFO L229 MonitoredProcess]: Starting monitored process 202 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:29:39,425 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (202)] Waiting until timeout for monitored process [2022-02-11 00:29:39,481 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-11 00:29:39,482 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:29:39,482 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-11 00:29:39,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:29:39,809 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 96 treesize of output 80 [2022-02-11 00:29:39,811 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 80 treesize of output 64 [2022-02-11 00:29:39,886 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:29:39,886 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:29:40,051 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-11 00:29:40,052 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 65 treesize of output 56 [2022-02-11 00:29:40,055 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 34 [2022-02-11 00:29:40,119 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:29:40,120 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1456870534] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:29:40,120 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:29:40,120 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-02-11 00:29:40,120 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [997052590] [2022-02-11 00:29:40,120 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:29:40,120 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-11 00:29:40,120 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:29:40,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-11 00:29:40,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=556, Unknown=0, NotChecked=0, Total=650 [2022-02-11 00:29:40,120 INFO L87 Difference]: Start difference. First operand 666 states and 1910 transitions. Second operand has 26 states, 26 states have (on average 1.3846153846153846) internal successors, (36), 26 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) [2022-02-11 00:29:40,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:29:40,819 INFO L93 Difference]: Finished difference Result 796 states and 2204 transitions. [2022-02-11 00:29:40,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-02-11 00:29:40,819 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.3846153846153846) internal successors, (36), 26 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 19 [2022-02-11 00:29:40,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:29:40,820 INFO L225 Difference]: With dead ends: 796 [2022-02-11 00:29:40,820 INFO L226 Difference]: Without dead ends: 794 [2022-02-11 00:29:40,821 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=209, Invalid=1123, Unknown=0, NotChecked=0, Total=1332 [2022-02-11 00:29:40,821 INFO L934 BasicCegarLoop]: 18 mSDtfsCounter, 234 mSDsluCounter, 280 mSDsCounter, 0 mSdLazyCounter, 431 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 234 SdHoareTripleChecker+Valid, 161 SdHoareTripleChecker+Invalid, 454 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 431 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-11 00:29:40,821 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [234 Valid, 161 Invalid, 454 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 431 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-11 00:29:40,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 794 states. [2022-02-11 00:29:40,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 794 to 660. [2022-02-11 00:29:40,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 660 states, 659 states have (on average 2.874051593323217) internal successors, (1894), 659 states have internal predecessors, (1894), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:29:40,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 660 states to 660 states and 1894 transitions. [2022-02-11 00:29:40,829 INFO L78 Accepts]: Start accepts. Automaton has 660 states and 1894 transitions. Word has length 19 [2022-02-11 00:29:40,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:29:40,829 INFO L470 AbstractCegarLoop]: Abstraction has 660 states and 1894 transitions. [2022-02-11 00:29:40,829 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.3846153846153846) internal successors, (36), 26 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) [2022-02-11 00:29:40,829 INFO L276 IsEmpty]: Start isEmpty. Operand 660 states and 1894 transitions. [2022-02-11 00:29:40,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-02-11 00:29:40,830 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:29:40,830 INFO L515 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:29:40,846 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (202)] Ended with exit code 0 [2022-02-11 00:29:41,031 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable209,202 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:29:41,031 INFO L402 AbstractCegarLoop]: === Iteration 211 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:29:41,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:29:41,031 INFO L85 PathProgramCache]: Analyzing trace with hash -1816778509, now seen corresponding path program 202 times [2022-02-11 00:29:41,031 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:29:41,031 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1475532742] [2022-02-11 00:29:41,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:29:41,032 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:29:41,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:29:41,159 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:29:41,159 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:29:41,159 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1475532742] [2022-02-11 00:29:41,159 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1475532742] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:29:41,159 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1268490852] [2022-02-11 00:29:41,159 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-11 00:29:41,159 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:29:41,159 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:29:41,160 INFO L229 MonitoredProcess]: Starting monitored process 203 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:29:41,160 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (203)] Waiting until timeout for monitored process [2022-02-11 00:29:41,216 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-11 00:29:41,216 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:29:41,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-11 00:29:41,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:29:41,502 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 87 treesize of output 71 [2022-02-11 00:29:41,504 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 55 [2022-02-11 00:29:41,578 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:29:41,578 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:29:41,778 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-11 00:29:41,778 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 30 treesize of output 25 [2022-02-11 00:29:41,816 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:29:41,816 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1268490852] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:29:41,816 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:29:41,816 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 27 [2022-02-11 00:29:41,816 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2080800535] [2022-02-11 00:29:41,816 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:29:41,817 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-11 00:29:41,817 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:29:41,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-11 00:29:41,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=623, Unknown=0, NotChecked=0, Total=702 [2022-02-11 00:29:41,817 INFO L87 Difference]: Start difference. First operand 660 states and 1894 transitions. Second operand has 27 states, 27 states have (on average 1.4444444444444444) internal successors, (39), 27 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) [2022-02-11 00:29:42,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:29:42,594 INFO L93 Difference]: Finished difference Result 803 states and 2222 transitions. [2022-02-11 00:29:42,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-02-11 00:29:42,594 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.4444444444444444) internal successors, (39), 27 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 19 [2022-02-11 00:29:42,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:29:42,595 INFO L225 Difference]: With dead ends: 803 [2022-02-11 00:29:42,595 INFO L226 Difference]: Without dead ends: 800 [2022-02-11 00:29:42,596 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 295 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=266, Invalid=1714, Unknown=0, NotChecked=0, Total=1980 [2022-02-11 00:29:42,596 INFO L934 BasicCegarLoop]: 16 mSDtfsCounter, 194 mSDsluCounter, 331 mSDsCounter, 0 mSdLazyCounter, 601 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 194 SdHoareTripleChecker+Valid, 198 SdHoareTripleChecker+Invalid, 676 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 601 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-11 00:29:42,596 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [194 Valid, 198 Invalid, 676 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 601 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-11 00:29:42,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 800 states. [2022-02-11 00:29:42,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 800 to 661. [2022-02-11 00:29:42,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 661 states, 660 states have (on average 2.8727272727272726) internal successors, (1896), 660 states have internal predecessors, (1896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:29:42,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 661 states to 661 states and 1896 transitions. [2022-02-11 00:29:42,603 INFO L78 Accepts]: Start accepts. Automaton has 661 states and 1896 transitions. Word has length 19 [2022-02-11 00:29:42,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:29:42,604 INFO L470 AbstractCegarLoop]: Abstraction has 661 states and 1896 transitions. [2022-02-11 00:29:42,604 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.4444444444444444) internal successors, (39), 27 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) [2022-02-11 00:29:42,604 INFO L276 IsEmpty]: Start isEmpty. Operand 661 states and 1896 transitions. [2022-02-11 00:29:42,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-02-11 00:29:42,604 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:29:42,604 INFO L515 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:29:42,621 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (203)] Forceful destruction successful, exit code 0 [2022-02-11 00:29:42,805 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 203 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable210 [2022-02-11 00:29:42,805 INFO L402 AbstractCegarLoop]: === Iteration 212 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:29:42,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:29:42,805 INFO L85 PathProgramCache]: Analyzing trace with hash 1118072047, now seen corresponding path program 203 times [2022-02-11 00:29:42,805 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:29:42,805 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1946661936] [2022-02-11 00:29:42,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:29:42,805 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:29:42,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:29:42,939 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:29:42,939 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:29:42,939 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1946661936] [2022-02-11 00:29:42,939 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1946661936] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:29:42,939 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [932520852] [2022-02-11 00:29:42,939 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-11 00:29:42,939 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:29:42,939 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:29:42,940 INFO L229 MonitoredProcess]: Starting monitored process 204 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:29:42,941 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (204)] Waiting until timeout for monitored process [2022-02-11 00:29:42,999 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-02-11 00:29:43,000 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:29:43,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-11 00:29:43,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:29:43,334 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 96 treesize of output 80 [2022-02-11 00:29:43,336 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 80 treesize of output 64 [2022-02-11 00:29:43,411 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:29:43,411 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:29:43,593 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-11 00:29:43,594 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 65 treesize of output 56 [2022-02-11 00:29:43,597 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 34 [2022-02-11 00:29:43,657 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:29:43,658 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [932520852] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:29:43,658 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:29:43,658 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 27 [2022-02-11 00:29:43,658 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [748544974] [2022-02-11 00:29:43,658 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:29:43,658 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-11 00:29:43,658 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:29:43,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-11 00:29:43,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=599, Unknown=0, NotChecked=0, Total=702 [2022-02-11 00:29:43,658 INFO L87 Difference]: Start difference. First operand 661 states and 1896 transitions. Second operand has 27 states, 27 states have (on average 1.3703703703703705) internal successors, (37), 27 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) [2022-02-11 00:29:44,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:29:44,305 INFO L93 Difference]: Finished difference Result 780 states and 2179 transitions. [2022-02-11 00:29:44,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-11 00:29:44,305 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.3703703703703705) internal successors, (37), 27 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 19 [2022-02-11 00:29:44,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:29:44,306 INFO L225 Difference]: With dead ends: 780 [2022-02-11 00:29:44,306 INFO L226 Difference]: Without dead ends: 780 [2022-02-11 00:29:44,307 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=195, Invalid=1137, Unknown=0, NotChecked=0, Total=1332 [2022-02-11 00:29:44,307 INFO L934 BasicCegarLoop]: 17 mSDtfsCounter, 136 mSDsluCounter, 319 mSDsCounter, 0 mSdLazyCounter, 503 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 521 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 503 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-11 00:29:44,307 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [136 Valid, 163 Invalid, 521 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 503 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-11 00:29:44,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 780 states. [2022-02-11 00:29:44,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 780 to 661. [2022-02-11 00:29:44,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 661 states, 660 states have (on average 2.8727272727272726) internal successors, (1896), 660 states have internal predecessors, (1896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:29:44,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 661 states to 661 states and 1896 transitions. [2022-02-11 00:29:44,314 INFO L78 Accepts]: Start accepts. Automaton has 661 states and 1896 transitions. Word has length 19 [2022-02-11 00:29:44,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:29:44,314 INFO L470 AbstractCegarLoop]: Abstraction has 661 states and 1896 transitions. [2022-02-11 00:29:44,314 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.3703703703703705) internal successors, (37), 27 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) [2022-02-11 00:29:44,315 INFO L276 IsEmpty]: Start isEmpty. Operand 661 states and 1896 transitions. [2022-02-11 00:29:44,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-02-11 00:29:44,315 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:29:44,315 INFO L515 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:29:44,331 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (204)] Ended with exit code 0 [2022-02-11 00:29:44,524 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 204 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable211 [2022-02-11 00:29:44,525 INFO L402 AbstractCegarLoop]: === Iteration 213 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:29:44,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:29:44,525 INFO L85 PathProgramCache]: Analyzing trace with hash -1387630665, now seen corresponding path program 204 times [2022-02-11 00:29:44,525 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:29:44,525 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1377016437] [2022-02-11 00:29:44,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:29:44,525 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:29:44,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:29:44,644 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:29:44,644 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:29:44,644 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1377016437] [2022-02-11 00:29:44,644 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1377016437] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:29:44,644 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1907471987] [2022-02-11 00:29:44,644 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-11 00:29:44,644 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:29:44,644 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:29:44,645 INFO L229 MonitoredProcess]: Starting monitored process 205 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:29:44,646 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (205)] Waiting until timeout for monitored process [2022-02-11 00:29:44,702 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-11 00:29:44,703 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:29:44,703 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-11 00:29:44,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:29:44,963 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:29:44,963 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:29:45,156 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:29:45,156 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 42 treesize of output 40 [2022-02-11 00:29:45,161 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:29:45,161 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 30 treesize of output 28 [2022-02-11 00:29:45,240 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:29:45,240 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1907471987] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:29:45,240 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:29:45,240 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 27 [2022-02-11 00:29:45,240 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1826498493] [2022-02-11 00:29:45,240 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:29:45,241 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-11 00:29:45,241 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:29:45,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-11 00:29:45,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=628, Unknown=0, NotChecked=0, Total=702 [2022-02-11 00:29:45,241 INFO L87 Difference]: Start difference. First operand 661 states and 1896 transitions. Second operand has 27 states, 27 states have (on average 1.4444444444444444) internal successors, (39), 27 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) [2022-02-11 00:29:45,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:29:45,751 INFO L93 Difference]: Finished difference Result 737 states and 2049 transitions. [2022-02-11 00:29:45,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-11 00:29:45,752 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.4444444444444444) internal successors, (39), 27 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 19 [2022-02-11 00:29:45,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:29:45,753 INFO L225 Difference]: With dead ends: 737 [2022-02-11 00:29:45,753 INFO L226 Difference]: Without dead ends: 737 [2022-02-11 00:29:45,753 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=146, Invalid=1114, Unknown=0, NotChecked=0, Total=1260 [2022-02-11 00:29:45,753 INFO L934 BasicCegarLoop]: 14 mSDtfsCounter, 84 mSDsluCounter, 484 mSDsCounter, 0 mSdLazyCounter, 806 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 262 SdHoareTripleChecker+Invalid, 836 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 806 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-11 00:29:45,753 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 262 Invalid, 836 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 806 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-11 00:29:45,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 737 states. [2022-02-11 00:29:45,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 737 to 658. [2022-02-11 00:29:45,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 658 states, 657 states have (on average 2.872146118721461) internal successors, (1887), 657 states have internal predecessors, (1887), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:29:45,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 658 states to 658 states and 1887 transitions. [2022-02-11 00:29:45,761 INFO L78 Accepts]: Start accepts. Automaton has 658 states and 1887 transitions. Word has length 19 [2022-02-11 00:29:45,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:29:45,761 INFO L470 AbstractCegarLoop]: Abstraction has 658 states and 1887 transitions. [2022-02-11 00:29:45,761 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.4444444444444444) internal successors, (39), 27 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) [2022-02-11 00:29:45,761 INFO L276 IsEmpty]: Start isEmpty. Operand 658 states and 1887 transitions. [2022-02-11 00:29:45,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-02-11 00:29:45,762 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:29:45,762 INFO L515 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:29:45,778 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (205)] Ended with exit code 0 [2022-02-11 00:29:45,962 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 205 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable212 [2022-02-11 00:29:45,962 INFO L402 AbstractCegarLoop]: === Iteration 214 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:29:45,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:29:45,962 INFO L85 PathProgramCache]: Analyzing trace with hash -501832385, now seen corresponding path program 205 times [2022-02-11 00:29:45,962 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:29:45,962 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1394175339] [2022-02-11 00:29:45,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:29:45,963 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:29:45,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:29:46,088 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:29:46,088 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:29:46,088 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1394175339] [2022-02-11 00:29:46,088 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1394175339] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:29:46,088 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [453108428] [2022-02-11 00:29:46,088 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-11 00:29:46,088 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:29:46,088 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:29:46,089 INFO L229 MonitoredProcess]: Starting monitored process 206 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:29:46,090 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (206)] Waiting until timeout for monitored process [2022-02-11 00:29:46,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:29:46,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-11 00:29:46,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:29:46,444 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:29:46,444 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:29:46,655 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:29:46,655 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 42 treesize of output 40 [2022-02-11 00:29:46,660 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:29:46,661 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 30 treesize of output 28 [2022-02-11 00:29:46,743 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:29:46,744 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [453108428] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:29:46,744 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:29:46,744 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 27 [2022-02-11 00:29:46,744 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37696199] [2022-02-11 00:29:46,744 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:29:46,744 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-11 00:29:46,744 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:29:46,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-11 00:29:46,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=627, Unknown=0, NotChecked=0, Total=702 [2022-02-11 00:29:46,744 INFO L87 Difference]: Start difference. First operand 658 states and 1887 transitions. Second operand has 27 states, 27 states have (on average 1.4444444444444444) internal successors, (39), 27 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) [2022-02-11 00:29:47,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:29:47,304 INFO L93 Difference]: Finished difference Result 742 states and 2058 transitions. [2022-02-11 00:29:47,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-02-11 00:29:47,304 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.4444444444444444) internal successors, (39), 27 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 19 [2022-02-11 00:29:47,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:29:47,305 INFO L225 Difference]: With dead ends: 742 [2022-02-11 00:29:47,305 INFO L226 Difference]: Without dead ends: 742 [2022-02-11 00:29:47,305 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=147, Invalid=1113, Unknown=0, NotChecked=0, Total=1260 [2022-02-11 00:29:47,306 INFO L934 BasicCegarLoop]: 15 mSDtfsCounter, 96 mSDsluCounter, 481 mSDsCounter, 0 mSdLazyCounter, 825 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 280 SdHoareTripleChecker+Invalid, 851 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 825 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-11 00:29:47,306 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [96 Valid, 280 Invalid, 851 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 825 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-11 00:29:47,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 742 states. [2022-02-11 00:29:47,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 742 to 658. [2022-02-11 00:29:47,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 658 states, 657 states have (on average 2.872146118721461) internal successors, (1887), 657 states have internal predecessors, (1887), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:29:47,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 658 states to 658 states and 1887 transitions. [2022-02-11 00:29:47,313 INFO L78 Accepts]: Start accepts. Automaton has 658 states and 1887 transitions. Word has length 19 [2022-02-11 00:29:47,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:29:47,313 INFO L470 AbstractCegarLoop]: Abstraction has 658 states and 1887 transitions. [2022-02-11 00:29:47,313 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.4444444444444444) internal successors, (39), 27 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) [2022-02-11 00:29:47,313 INFO L276 IsEmpty]: Start isEmpty. Operand 658 states and 1887 transitions. [2022-02-11 00:29:47,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-02-11 00:29:47,314 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:29:47,314 INFO L515 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:29:47,330 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (206)] Ended with exit code 0 [2022-02-11 00:29:47,514 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 206 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable213 [2022-02-11 00:29:47,514 INFO L402 AbstractCegarLoop]: === Iteration 215 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:29:47,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:29:47,515 INFO L85 PathProgramCache]: Analyzing trace with hash 1604951735, now seen corresponding path program 206 times [2022-02-11 00:29:47,515 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:29:47,515 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [588536647] [2022-02-11 00:29:47,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:29:47,515 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:29:47,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:29:47,634 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:29:47,634 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:29:47,634 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [588536647] [2022-02-11 00:29:47,634 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [588536647] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:29:47,635 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1831350320] [2022-02-11 00:29:47,635 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-11 00:29:47,635 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:29:47,635 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:29:47,636 INFO L229 MonitoredProcess]: Starting monitored process 207 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:29:47,636 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (207)] Waiting until timeout for monitored process [2022-02-11 00:29:47,700 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-11 00:29:47,700 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:29:47,701 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 46 conjunts are in the unsatisfiable core [2022-02-11 00:29:47,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:29:48,263 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:29:48,263 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 72 treesize of output 68 [2022-02-11 00:29:48,269 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:29:48,269 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 60 treesize of output 56 [2022-02-11 00:29:48,455 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:29:48,455 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:29:49,451 INFO L353 Elim1Store]: treesize reduction 5, result has 82.8 percent of original size [2022-02-11 00:29:49,451 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 131 treesize of output 118 [2022-02-11 00:29:49,462 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:29:49,462 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 95 treesize of output 77 [2022-02-11 00:29:49,720 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:29:49,720 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1831350320] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:29:49,720 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:29:49,721 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 13] total 31 [2022-02-11 00:29:49,721 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1572172605] [2022-02-11 00:29:49,721 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:29:49,721 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-02-11 00:29:49,721 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:29:49,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-02-11 00:29:49,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=835, Unknown=0, NotChecked=0, Total=930 [2022-02-11 00:29:49,721 INFO L87 Difference]: Start difference. First operand 658 states and 1887 transitions. Second operand has 31 states, 31 states have (on average 1.4838709677419355) internal successors, (46), 31 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) [2022-02-11 00:29:51,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:29:51,314 INFO L93 Difference]: Finished difference Result 786 states and 2124 transitions. [2022-02-11 00:29:51,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-02-11 00:29:51,314 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.4838709677419355) internal successors, (46), 31 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 19 [2022-02-11 00:29:51,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:29:51,316 INFO L225 Difference]: With dead ends: 786 [2022-02-11 00:29:51,316 INFO L226 Difference]: Without dead ends: 779 [2022-02-11 00:29:51,316 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 513 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=313, Invalid=2443, Unknown=0, NotChecked=0, Total=2756 [2022-02-11 00:29:51,316 INFO L934 BasicCegarLoop]: 18 mSDtfsCounter, 179 mSDsluCounter, 660 mSDsCounter, 0 mSdLazyCounter, 1274 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 179 SdHoareTripleChecker+Valid, 385 SdHoareTripleChecker+Invalid, 1349 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 1274 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 4 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-11 00:29:51,316 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [179 Valid, 385 Invalid, 1349 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 1274 Invalid, 0 Unknown, 4 Unchecked, 0.6s Time] [2022-02-11 00:29:51,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 779 states. [2022-02-11 00:29:51,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 779 to 658. [2022-02-11 00:29:51,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 658 states, 657 states have (on average 2.872146118721461) internal successors, (1887), 657 states have internal predecessors, (1887), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:29:51,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 658 states to 658 states and 1887 transitions. [2022-02-11 00:29:51,324 INFO L78 Accepts]: Start accepts. Automaton has 658 states and 1887 transitions. Word has length 19 [2022-02-11 00:29:51,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:29:51,324 INFO L470 AbstractCegarLoop]: Abstraction has 658 states and 1887 transitions. [2022-02-11 00:29:51,324 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.4838709677419355) internal successors, (46), 31 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) [2022-02-11 00:29:51,324 INFO L276 IsEmpty]: Start isEmpty. Operand 658 states and 1887 transitions. [2022-02-11 00:29:51,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-02-11 00:29:51,324 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:29:51,325 INFO L515 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:29:51,341 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (207)] Ended with exit code 0 [2022-02-11 00:29:51,539 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 207 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable214 [2022-02-11 00:29:51,540 INFO L402 AbstractCegarLoop]: === Iteration 216 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:29:51,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:29:51,540 INFO L85 PathProgramCache]: Analyzing trace with hash -543844801, now seen corresponding path program 207 times [2022-02-11 00:29:51,540 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:29:51,540 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [955573262] [2022-02-11 00:29:51,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:29:51,540 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:29:51,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:29:51,672 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:29:51,673 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:29:51,673 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [955573262] [2022-02-11 00:29:51,673 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [955573262] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:29:51,673 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [829870471] [2022-02-11 00:29:51,673 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-11 00:29:51,673 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:29:51,673 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:29:51,674 INFO L229 MonitoredProcess]: Starting monitored process 208 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:29:51,674 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (208)] Waiting until timeout for monitored process [2022-02-11 00:29:51,733 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-02-11 00:29:51,733 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:29:51,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-11 00:29:51,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:29:52,022 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 73 [2022-02-11 00:29:52,024 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 57 [2022-02-11 00:29:52,096 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:29:52,096 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:29:52,282 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:29:52,282 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 41 treesize of output 39 [2022-02-11 00:29:52,287 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:29:52,288 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 29 treesize of output 27 [2022-02-11 00:29:52,384 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:29:52,385 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [829870471] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:29:52,385 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:29:52,385 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 27 [2022-02-11 00:29:52,385 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [862741274] [2022-02-11 00:29:52,385 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:29:52,385 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-11 00:29:52,385 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:29:52,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-11 00:29:52,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=629, Unknown=0, NotChecked=0, Total=702 [2022-02-11 00:29:52,385 INFO L87 Difference]: Start difference. First operand 658 states and 1887 transitions. Second operand has 27 states, 27 states have (on average 1.4444444444444444) internal successors, (39), 27 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) [2022-02-11 00:29:52,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:29:52,972 INFO L93 Difference]: Finished difference Result 735 states and 2039 transitions. [2022-02-11 00:29:52,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-02-11 00:29:52,972 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.4444444444444444) internal successors, (39), 27 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 19 [2022-02-11 00:29:52,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:29:52,973 INFO L225 Difference]: With dead ends: 735 [2022-02-11 00:29:52,973 INFO L226 Difference]: Without dead ends: 732 [2022-02-11 00:29:52,974 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=174, Invalid=1158, Unknown=0, NotChecked=0, Total=1332 [2022-02-11 00:29:52,974 INFO L934 BasicCegarLoop]: 15 mSDtfsCounter, 148 mSDsluCounter, 427 mSDsCounter, 0 mSdLazyCounter, 807 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 256 SdHoareTripleChecker+Invalid, 862 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 807 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-11 00:29:52,974 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [148 Valid, 256 Invalid, 862 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 807 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-11 00:29:52,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 732 states. [2022-02-11 00:29:52,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 732 to 658. [2022-02-11 00:29:52,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 658 states, 657 states have (on average 2.8706240487062407) internal successors, (1886), 657 states have internal predecessors, (1886), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:29:52,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 658 states to 658 states and 1886 transitions. [2022-02-11 00:29:52,983 INFO L78 Accepts]: Start accepts. Automaton has 658 states and 1886 transitions. Word has length 19 [2022-02-11 00:29:52,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:29:52,983 INFO L470 AbstractCegarLoop]: Abstraction has 658 states and 1886 transitions. [2022-02-11 00:29:52,983 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.4444444444444444) internal successors, (39), 27 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) [2022-02-11 00:29:52,983 INFO L276 IsEmpty]: Start isEmpty. Operand 658 states and 1886 transitions. [2022-02-11 00:29:52,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-02-11 00:29:52,984 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:29:52,984 INFO L515 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:29:53,000 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (208)] Ended with exit code 0 [2022-02-11 00:29:53,188 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable215,208 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:29:53,188 INFO L402 AbstractCegarLoop]: === Iteration 217 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:29:53,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:29:53,188 INFO L85 PathProgramCache]: Analyzing trace with hash -1888500745, now seen corresponding path program 208 times [2022-02-11 00:29:53,188 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:29:53,188 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2087997390] [2022-02-11 00:29:53,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:29:53,189 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:29:53,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:29:53,310 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:29:53,311 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:29:53,311 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2087997390] [2022-02-11 00:29:53,311 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2087997390] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:29:53,311 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [432277991] [2022-02-11 00:29:53,311 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-11 00:29:53,311 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:29:53,311 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:29:53,319 INFO L229 MonitoredProcess]: Starting monitored process 209 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:29:53,320 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (209)] Waiting until timeout for monitored process [2022-02-11 00:29:53,375 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-11 00:29:53,375 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:29:53,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-11 00:29:53,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:29:53,691 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 96 treesize of output 80 [2022-02-11 00:29:53,692 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 80 treesize of output 64 [2022-02-11 00:29:53,761 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:29:53,762 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:29:53,917 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:29:53,917 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 73 treesize of output 67 [2022-02-11 00:29:53,924 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:29:53,924 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 57 treesize of output 51 [2022-02-11 00:29:54,046 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:29:54,047 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [432277991] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:29:54,047 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:29:54,047 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 27 [2022-02-11 00:29:54,047 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [527829509] [2022-02-11 00:29:54,047 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:29:54,047 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-11 00:29:54,047 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:29:54,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-11 00:29:54,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=605, Unknown=0, NotChecked=0, Total=702 [2022-02-11 00:29:54,047 INFO L87 Difference]: Start difference. First operand 658 states and 1886 transitions. Second operand has 27 states, 27 states have (on average 1.4074074074074074) internal successors, (38), 27 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) [2022-02-11 00:29:54,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:29:54,431 INFO L93 Difference]: Finished difference Result 712 states and 1993 transitions. [2022-02-11 00:29:54,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-11 00:29:54,431 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.4074074074074074) internal successors, (38), 27 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 19 [2022-02-11 00:29:54,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:29:54,433 INFO L225 Difference]: With dead ends: 712 [2022-02-11 00:29:54,433 INFO L226 Difference]: Without dead ends: 710 [2022-02-11 00:29:54,433 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=146, Invalid=910, Unknown=0, NotChecked=0, Total=1056 [2022-02-11 00:29:54,433 INFO L934 BasicCegarLoop]: 13 mSDtfsCounter, 105 mSDsluCounter, 284 mSDsCounter, 0 mSdLazyCounter, 516 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 534 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 516 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-11 00:29:54,433 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [105 Valid, 153 Invalid, 534 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 516 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-11 00:29:54,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 710 states. [2022-02-11 00:29:54,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 710 to 653. [2022-02-11 00:29:54,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 653 states, 652 states have (on average 2.8726993865030677) internal successors, (1873), 652 states have internal predecessors, (1873), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:29:54,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 653 states to 653 states and 1873 transitions. [2022-02-11 00:29:54,441 INFO L78 Accepts]: Start accepts. Automaton has 653 states and 1873 transitions. Word has length 19 [2022-02-11 00:29:54,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:29:54,441 INFO L470 AbstractCegarLoop]: Abstraction has 653 states and 1873 transitions. [2022-02-11 00:29:54,441 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.4074074074074074) internal successors, (38), 27 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) [2022-02-11 00:29:54,441 INFO L276 IsEmpty]: Start isEmpty. Operand 653 states and 1873 transitions. [2022-02-11 00:29:54,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-02-11 00:29:54,446 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:29:54,446 INFO L515 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:29:54,462 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (209)] Forceful destruction successful, exit code 0 [2022-02-11 00:29:54,659 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 209 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable216 [2022-02-11 00:29:54,659 INFO L402 AbstractCegarLoop]: === Iteration 218 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:29:54,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:29:54,660 INFO L85 PathProgramCache]: Analyzing trace with hash 1188110519, now seen corresponding path program 209 times [2022-02-11 00:29:54,660 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:29:54,660 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [213812714] [2022-02-11 00:29:54,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:29:54,660 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:29:54,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:29:54,778 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:29:54,779 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:29:54,779 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [213812714] [2022-02-11 00:29:54,779 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [213812714] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:29:54,779 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [130684589] [2022-02-11 00:29:54,779 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-11 00:29:54,779 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:29:54,779 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:29:54,780 INFO L229 MonitoredProcess]: Starting monitored process 210 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:29:54,780 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (210)] Waiting until timeout for monitored process [2022-02-11 00:29:54,840 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-11 00:29:54,840 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:29:54,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-11 00:29:54,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:29:55,120 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:29:55,120 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:29:55,270 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:29:55,270 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 41 treesize of output 39 [2022-02-11 00:29:55,275 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:29:55,275 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 29 treesize of output 27 [2022-02-11 00:29:55,371 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:29:55,371 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [130684589] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:29:55,371 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:29:55,371 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-02-11 00:29:55,371 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [123871737] [2022-02-11 00:29:55,371 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:29:55,371 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-11 00:29:55,371 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:29:55,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-11 00:29:55,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=525, Unknown=0, NotChecked=0, Total=600 [2022-02-11 00:29:55,372 INFO L87 Difference]: Start difference. First operand 653 states and 1873 transitions. Second operand has 25 states, 25 states have (on average 1.52) internal successors, (38), 25 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) [2022-02-11 00:29:55,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:29:55,874 INFO L93 Difference]: Finished difference Result 769 states and 2104 transitions. [2022-02-11 00:29:55,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-02-11 00:29:55,874 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.52) internal successors, (38), 25 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 19 [2022-02-11 00:29:55,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:29:55,875 INFO L225 Difference]: With dead ends: 769 [2022-02-11 00:29:55,875 INFO L226 Difference]: Without dead ends: 769 [2022-02-11 00:29:55,875 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=120, Invalid=750, Unknown=0, NotChecked=0, Total=870 [2022-02-11 00:29:55,875 INFO L934 BasicCegarLoop]: 20 mSDtfsCounter, 147 mSDsluCounter, 473 mSDsCounter, 0 mSdLazyCounter, 822 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 278 SdHoareTripleChecker+Invalid, 850 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 822 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-11 00:29:55,875 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [147 Valid, 278 Invalid, 850 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 822 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-11 00:29:55,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 769 states. [2022-02-11 00:29:55,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 769 to 654. [2022-02-11 00:29:55,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 654 states, 653 states have (on average 2.875957120980092) internal successors, (1878), 653 states have internal predecessors, (1878), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:29:55,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 654 states to 654 states and 1878 transitions. [2022-02-11 00:29:55,883 INFO L78 Accepts]: Start accepts. Automaton has 654 states and 1878 transitions. Word has length 19 [2022-02-11 00:29:55,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:29:55,883 INFO L470 AbstractCegarLoop]: Abstraction has 654 states and 1878 transitions. [2022-02-11 00:29:55,883 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.52) internal successors, (38), 25 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) [2022-02-11 00:29:55,883 INFO L276 IsEmpty]: Start isEmpty. Operand 654 states and 1878 transitions. [2022-02-11 00:29:55,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-02-11 00:29:55,884 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:29:55,884 INFO L515 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:29:55,900 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (210)] Ended with exit code 0 [2022-02-11 00:29:56,084 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 210 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable217 [2022-02-11 00:29:56,084 INFO L402 AbstractCegarLoop]: === Iteration 219 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:29:56,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:29:56,084 INFO L85 PathProgramCache]: Analyzing trace with hash -1000072657, now seen corresponding path program 210 times [2022-02-11 00:29:56,084 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:29:56,084 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1218864965] [2022-02-11 00:29:56,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:29:56,085 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:29:56,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:29:56,217 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:29:56,217 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:29:56,217 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1218864965] [2022-02-11 00:29:56,217 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1218864965] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:29:56,217 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [43608538] [2022-02-11 00:29:56,218 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-11 00:29:56,218 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:29:56,218 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:29:56,218 INFO L229 MonitoredProcess]: Starting monitored process 211 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:29:56,219 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (211)] Waiting until timeout for monitored process [2022-02-11 00:29:56,277 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-02-11 00:29:56,277 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:29:56,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-11 00:29:56,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:29:56,568 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:29:56,568 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:29:56,755 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:29:56,755 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 42 treesize of output 40 [2022-02-11 00:29:56,760 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:29:56,760 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 30 treesize of output 28 [2022-02-11 00:29:56,856 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:29:56,856 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [43608538] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:29:56,856 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:29:56,856 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-02-11 00:29:56,856 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109024402] [2022-02-11 00:29:56,856 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:29:56,856 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-11 00:29:56,856 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:29:56,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-11 00:29:56,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=570, Unknown=0, NotChecked=0, Total=650 [2022-02-11 00:29:56,857 INFO L87 Difference]: Start difference. First operand 654 states and 1878 transitions. Second operand has 26 states, 26 states have (on average 1.4615384615384615) internal successors, (38), 26 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) [2022-02-11 00:29:57,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:29:57,699 INFO L93 Difference]: Finished difference Result 784 states and 2140 transitions. [2022-02-11 00:29:57,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-02-11 00:29:57,699 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.4615384615384615) internal successors, (38), 26 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 19 [2022-02-11 00:29:57,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:29:57,700 INFO L225 Difference]: With dead ends: 784 [2022-02-11 00:29:57,700 INFO L226 Difference]: Without dead ends: 784 [2022-02-11 00:29:57,700 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 315 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=218, Invalid=1422, Unknown=0, NotChecked=0, Total=1640 [2022-02-11 00:29:57,701 INFO L934 BasicCegarLoop]: 19 mSDtfsCounter, 107 mSDsluCounter, 432 mSDsCounter, 0 mSdLazyCounter, 865 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 281 SdHoareTripleChecker+Invalid, 892 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 865 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-11 00:29:57,702 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [107 Valid, 281 Invalid, 892 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 865 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-11 00:29:57,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 784 states. [2022-02-11 00:29:57,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 784 to 662. [2022-02-11 00:29:57,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 662 states, 661 states have (on average 2.8744326777609683) internal successors, (1900), 661 states have internal predecessors, (1900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:29:57,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 662 states to 662 states and 1900 transitions. [2022-02-11 00:29:57,709 INFO L78 Accepts]: Start accepts. Automaton has 662 states and 1900 transitions. Word has length 19 [2022-02-11 00:29:57,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:29:57,709 INFO L470 AbstractCegarLoop]: Abstraction has 662 states and 1900 transitions. [2022-02-11 00:29:57,709 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.4615384615384615) internal successors, (38), 26 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) [2022-02-11 00:29:57,710 INFO L276 IsEmpty]: Start isEmpty. Operand 662 states and 1900 transitions. [2022-02-11 00:29:57,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-02-11 00:29:57,710 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:29:57,710 INFO L515 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:29:57,727 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (211)] Ended with exit code 0 [2022-02-11 00:29:57,910 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 211 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable218 [2022-02-11 00:29:57,911 INFO L402 AbstractCegarLoop]: === Iteration 220 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:29:57,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:29:57,911 INFO L85 PathProgramCache]: Analyzing trace with hash 1146098103, now seen corresponding path program 211 times [2022-02-11 00:29:57,911 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:29:57,911 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [53979473] [2022-02-11 00:29:57,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:29:57,911 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:29:57,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:29:58,039 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:29:58,039 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:29:58,039 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [53979473] [2022-02-11 00:29:58,039 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [53979473] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:29:58,039 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2032276842] [2022-02-11 00:29:58,039 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-11 00:29:58,039 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:29:58,040 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:29:58,040 INFO L229 MonitoredProcess]: Starting monitored process 212 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:29:58,041 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (212)] Waiting until timeout for monitored process [2022-02-11 00:29:58,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:29:58,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 33 conjunts are in the unsatisfiable core [2022-02-11 00:29:58,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:29:58,428 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 105 treesize of output 85 [2022-02-11 00:29:58,430 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 57 [2022-02-11 00:29:58,523 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:29:58,523 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:29:58,726 INFO L353 Elim1Store]: treesize reduction 19, result has 34.5 percent of original size [2022-02-11 00:29:58,726 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 56 treesize of output 50 [2022-02-11 00:29:58,732 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:29:58,732 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 30 treesize of output 28 [2022-02-11 00:29:58,822 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:29:58,822 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2032276842] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:29:58,822 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:29:58,822 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-02-11 00:29:58,823 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1786894795] [2022-02-11 00:29:58,823 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:29:58,823 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-11 00:29:58,823 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:29:58,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-11 00:29:58,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=568, Unknown=0, NotChecked=0, Total=650 [2022-02-11 00:29:58,823 INFO L87 Difference]: Start difference. First operand 662 states and 1900 transitions. Second operand has 26 states, 26 states have (on average 1.4615384615384615) internal successors, (38), 26 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) [2022-02-11 00:29:59,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:29:59,864 INFO L93 Difference]: Finished difference Result 822 states and 2210 transitions. [2022-02-11 00:29:59,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-02-11 00:29:59,864 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.4615384615384615) internal successors, (38), 26 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 19 [2022-02-11 00:29:59,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:29:59,865 INFO L225 Difference]: With dead ends: 822 [2022-02-11 00:29:59,866 INFO L226 Difference]: Without dead ends: 816 [2022-02-11 00:29:59,866 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 372 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=279, Invalid=1613, Unknown=0, NotChecked=0, Total=1892 [2022-02-11 00:29:59,866 INFO L934 BasicCegarLoop]: 18 mSDtfsCounter, 193 mSDsluCounter, 442 mSDsCounter, 0 mSdLazyCounter, 1009 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 193 SdHoareTripleChecker+Valid, 285 SdHoareTripleChecker+Invalid, 1079 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 1009 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-11 00:29:59,866 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [193 Valid, 285 Invalid, 1079 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 1009 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-11 00:29:59,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 816 states. [2022-02-11 00:29:59,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 816 to 665. [2022-02-11 00:29:59,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 665 states, 664 states have (on average 2.8765060240963853) internal successors, (1910), 664 states have internal predecessors, (1910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:29:59,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 665 states to 665 states and 1910 transitions. [2022-02-11 00:29:59,874 INFO L78 Accepts]: Start accepts. Automaton has 665 states and 1910 transitions. Word has length 19 [2022-02-11 00:29:59,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:29:59,874 INFO L470 AbstractCegarLoop]: Abstraction has 665 states and 1910 transitions. [2022-02-11 00:29:59,874 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.4615384615384615) internal successors, (38), 26 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) [2022-02-11 00:29:59,874 INFO L276 IsEmpty]: Start isEmpty. Operand 665 states and 1910 transitions. [2022-02-11 00:29:59,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-02-11 00:29:59,874 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:29:59,875 INFO L515 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:29:59,890 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (212)] Ended with exit code 0 [2022-02-11 00:30:00,075 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable219,212 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:30:00,075 INFO L402 AbstractCegarLoop]: === Iteration 221 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:30:00,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:30:00,075 INFO L85 PathProgramCache]: Analyzing trace with hash -214018637, now seen corresponding path program 212 times [2022-02-11 00:30:00,075 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:30:00,075 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2066764027] [2022-02-11 00:30:00,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:30:00,076 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:30:00,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:30:00,191 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:30:00,191 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:30:00,191 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2066764027] [2022-02-11 00:30:00,191 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2066764027] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:30:00,191 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [155975365] [2022-02-11 00:30:00,191 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-11 00:30:00,191 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:30:00,192 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:30:00,192 INFO L229 MonitoredProcess]: Starting monitored process 213 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:30:00,193 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (213)] Waiting until timeout for monitored process [2022-02-11 00:30:00,250 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-11 00:30:00,251 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:30:00,251 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-11 00:30:00,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:30:00,534 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 98 treesize of output 82 [2022-02-11 00:30:00,536 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 82 treesize of output 66 [2022-02-11 00:30:00,606 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:30:00,606 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:30:00,723 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:30:00,723 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 73 treesize of output 67 [2022-02-11 00:30:00,730 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:30:00,730 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 57 treesize of output 51 [2022-02-11 00:30:00,877 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:30:00,877 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [155975365] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:30:00,877 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:30:00,877 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-02-11 00:30:00,877 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585005962] [2022-02-11 00:30:00,877 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:30:00,877 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-11 00:30:00,877 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:30:00,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-11 00:30:00,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=511, Unknown=0, NotChecked=0, Total=600 [2022-02-11 00:30:00,878 INFO L87 Difference]: Start difference. First operand 665 states and 1910 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 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) [2022-02-11 00:30:01,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:30:01,490 INFO L93 Difference]: Finished difference Result 763 states and 2083 transitions. [2022-02-11 00:30:01,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-02-11 00:30:01,490 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 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 19 [2022-02-11 00:30:01,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:30:01,491 INFO L225 Difference]: With dead ends: 763 [2022-02-11 00:30:01,491 INFO L226 Difference]: Without dead ends: 759 [2022-02-11 00:30:01,491 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 219 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=187, Invalid=1003, Unknown=0, NotChecked=0, Total=1190 [2022-02-11 00:30:01,492 INFO L934 BasicCegarLoop]: 20 mSDtfsCounter, 162 mSDsluCounter, 470 mSDsCounter, 0 mSdLazyCounter, 738 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 162 SdHoareTripleChecker+Valid, 269 SdHoareTripleChecker+Invalid, 777 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 738 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-11 00:30:01,492 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [162 Valid, 269 Invalid, 777 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 738 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-11 00:30:01,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 759 states. [2022-02-11 00:30:01,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 759 to 664. [2022-02-11 00:30:01,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 664 states, 663 states have (on average 2.871794871794872) internal successors, (1904), 663 states have internal predecessors, (1904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:30:01,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 664 states to 664 states and 1904 transitions. [2022-02-11 00:30:01,499 INFO L78 Accepts]: Start accepts. Automaton has 664 states and 1904 transitions. Word has length 19 [2022-02-11 00:30:01,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:30:01,499 INFO L470 AbstractCegarLoop]: Abstraction has 664 states and 1904 transitions. [2022-02-11 00:30:01,499 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 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) [2022-02-11 00:30:01,499 INFO L276 IsEmpty]: Start isEmpty. Operand 664 states and 1904 transitions. [2022-02-11 00:30:01,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-02-11 00:30:01,500 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:30:01,500 INFO L515 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:30:01,517 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (213)] Ended with exit code 0 [2022-02-11 00:30:01,700 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable220,213 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:30:01,700 INFO L402 AbstractCegarLoop]: === Iteration 222 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:30:01,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:30:01,700 INFO L85 PathProgramCache]: Analyzing trace with hash -114274377, now seen corresponding path program 213 times [2022-02-11 00:30:01,701 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:30:01,701 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1518816763] [2022-02-11 00:30:01,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:30:01,701 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:30:01,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:30:01,868 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:30:01,868 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:30:01,869 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1518816763] [2022-02-11 00:30:01,869 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1518816763] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:30:01,869 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [434401167] [2022-02-11 00:30:01,869 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-11 00:30:01,869 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:30:01,869 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:30:01,870 INFO L229 MonitoredProcess]: Starting monitored process 214 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:30:01,870 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (214)] Waiting until timeout for monitored process [2022-02-11 00:30:01,934 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-02-11 00:30:01,934 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:30:01,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-11 00:30:01,935 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:30:02,233 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:30:02,234 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:30:02,374 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:30:02,374 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 33 treesize of output 33 [2022-02-11 00:30:02,379 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:30:02,379 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 25 treesize of output 25 [2022-02-11 00:30:02,516 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:30:02,516 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [434401167] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:30:02,516 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:30:02,516 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-02-11 00:30:02,516 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1852420475] [2022-02-11 00:30:02,516 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:30:02,516 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-11 00:30:02,516 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:30:02,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-11 00:30:02,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=568, Unknown=0, NotChecked=0, Total=650 [2022-02-11 00:30:02,517 INFO L87 Difference]: Start difference. First operand 664 states and 1904 transitions. Second operand has 26 states, 26 states have (on average 1.4615384615384615) internal successors, (38), 26 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) [2022-02-11 00:30:03,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:30:03,380 INFO L93 Difference]: Finished difference Result 850 states and 2296 transitions. [2022-02-11 00:30:03,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-02-11 00:30:03,380 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.4615384615384615) internal successors, (38), 26 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 19 [2022-02-11 00:30:03,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:30:03,381 INFO L225 Difference]: With dead ends: 850 [2022-02-11 00:30:03,381 INFO L226 Difference]: Without dead ends: 850 [2022-02-11 00:30:03,382 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 334 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=227, Invalid=1495, Unknown=0, NotChecked=0, Total=1722 [2022-02-11 00:30:03,382 INFO L934 BasicCegarLoop]: 19 mSDtfsCounter, 133 mSDsluCounter, 399 mSDsCounter, 0 mSdLazyCounter, 849 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 240 SdHoareTripleChecker+Invalid, 907 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 849 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-11 00:30:03,382 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [133 Valid, 240 Invalid, 907 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 849 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-11 00:30:03,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 850 states. [2022-02-11 00:30:03,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 850 to 678. [2022-02-11 00:30:03,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 678 states, 677 states have (on average 2.8847858197932053) internal successors, (1953), 677 states have internal predecessors, (1953), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:30:03,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 678 states to 678 states and 1953 transitions. [2022-02-11 00:30:03,390 INFO L78 Accepts]: Start accepts. Automaton has 678 states and 1953 transitions. Word has length 19 [2022-02-11 00:30:03,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:30:03,390 INFO L470 AbstractCegarLoop]: Abstraction has 678 states and 1953 transitions. [2022-02-11 00:30:03,390 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.4615384615384615) internal successors, (38), 26 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) [2022-02-11 00:30:03,390 INFO L276 IsEmpty]: Start isEmpty. Operand 678 states and 1953 transitions. [2022-02-11 00:30:03,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-02-11 00:30:03,391 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:30:03,391 INFO L515 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:30:03,407 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (214)] Ended with exit code 0 [2022-02-11 00:30:03,591 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 214 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable221 [2022-02-11 00:30:03,591 INFO L402 AbstractCegarLoop]: === Iteration 223 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:30:03,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:30:03,591 INFO L85 PathProgramCache]: Analyzing trace with hash 2031896383, now seen corresponding path program 214 times [2022-02-11 00:30:03,591 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:30:03,592 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [195595613] [2022-02-11 00:30:03,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:30:03,592 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:30:03,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:30:03,773 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:30:03,773 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:30:03,773 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [195595613] [2022-02-11 00:30:03,773 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [195595613] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:30:03,773 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1126125710] [2022-02-11 00:30:03,773 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-11 00:30:03,773 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:30:03,773 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:30:03,774 INFO L229 MonitoredProcess]: Starting monitored process 215 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:30:03,775 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (215)] Waiting until timeout for monitored process [2022-02-11 00:30:03,837 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-11 00:30:03,837 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:30:03,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 33 conjunts are in the unsatisfiable core [2022-02-11 00:30:03,838 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:30:04,097 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 87 treesize of output 71 [2022-02-11 00:30:04,099 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 55 [2022-02-11 00:30:04,182 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:30:04,182 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:30:04,344 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:30:04,344 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 34 treesize of output 34 [2022-02-11 00:30:04,349 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:30:04,349 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 26 treesize of output 26 [2022-02-11 00:30:04,468 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:30:04,468 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1126125710] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:30:04,468 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:30:04,468 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-02-11 00:30:04,469 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1165288871] [2022-02-11 00:30:04,469 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:30:04,469 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-11 00:30:04,469 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:30:04,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-11 00:30:04,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=570, Unknown=0, NotChecked=0, Total=650 [2022-02-11 00:30:04,469 INFO L87 Difference]: Start difference. First operand 678 states and 1953 transitions. Second operand has 26 states, 26 states have (on average 1.4615384615384615) internal successors, (38), 26 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) [2022-02-11 00:30:05,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:30:05,642 INFO L93 Difference]: Finished difference Result 886 states and 2364 transitions. [2022-02-11 00:30:05,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-02-11 00:30:05,642 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.4615384615384615) internal successors, (38), 26 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 19 [2022-02-11 00:30:05,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:30:05,644 INFO L225 Difference]: With dead ends: 886 [2022-02-11 00:30:05,644 INFO L226 Difference]: Without dead ends: 880 [2022-02-11 00:30:05,644 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 515 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=337, Invalid=2113, Unknown=0, NotChecked=0, Total=2450 [2022-02-11 00:30:05,644 INFO L934 BasicCegarLoop]: 18 mSDtfsCounter, 166 mSDsluCounter, 409 mSDsCounter, 0 mSdLazyCounter, 1037 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 166 SdHoareTripleChecker+Valid, 252 SdHoareTripleChecker+Invalid, 1115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 1037 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-11 00:30:05,644 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [166 Valid, 252 Invalid, 1115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 1037 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-11 00:30:05,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 880 states. [2022-02-11 00:30:05,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 880 to 682. [2022-02-11 00:30:05,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 682 states, 681 states have (on average 2.8839941262848754) internal successors, (1964), 681 states have internal predecessors, (1964), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:30:05,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 682 states to 682 states and 1964 transitions. [2022-02-11 00:30:05,652 INFO L78 Accepts]: Start accepts. Automaton has 682 states and 1964 transitions. Word has length 19 [2022-02-11 00:30:05,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:30:05,652 INFO L470 AbstractCegarLoop]: Abstraction has 682 states and 1964 transitions. [2022-02-11 00:30:05,652 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.4615384615384615) internal successors, (38), 26 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) [2022-02-11 00:30:05,652 INFO L276 IsEmpty]: Start isEmpty. Operand 682 states and 1964 transitions. [2022-02-11 00:30:05,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-02-11 00:30:05,653 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:30:05,653 INFO L515 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:30:05,669 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (215)] Ended with exit code 0 [2022-02-11 00:30:05,853 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 215 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable222 [2022-02-11 00:30:05,853 INFO L402 AbstractCegarLoop]: === Iteration 224 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:30:05,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:30:05,854 INFO L85 PathProgramCache]: Analyzing trace with hash 671779643, now seen corresponding path program 215 times [2022-02-11 00:30:05,854 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:30:05,854 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1072280751] [2022-02-11 00:30:05,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:30:05,854 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:30:05,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:30:05,995 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:30:05,996 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:30:05,996 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1072280751] [2022-02-11 00:30:05,996 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1072280751] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:30:05,996 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1306675236] [2022-02-11 00:30:05,996 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-11 00:30:05,996 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:30:05,996 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:30:05,997 INFO L229 MonitoredProcess]: Starting monitored process 216 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:30:05,997 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (216)] Waiting until timeout for monitored process [2022-02-11 00:30:06,057 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-02-11 00:30:06,057 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:30:06,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-11 00:30:06,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:30:06,321 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 98 treesize of output 82 [2022-02-11 00:30:06,323 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 82 treesize of output 66 [2022-02-11 00:30:06,393 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:30:06,393 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:30:06,487 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:30:06,487 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 65 treesize of output 61 [2022-02-11 00:30:06,493 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:30:06,493 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 53 treesize of output 49 [2022-02-11 00:30:06,641 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:30:06,641 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1306675236] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:30:06,641 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:30:06,641 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-02-11 00:30:06,642 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836346680] [2022-02-11 00:30:06,642 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:30:06,642 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-11 00:30:06,642 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:30:06,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-11 00:30:06,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=518, Unknown=0, NotChecked=0, Total=600 [2022-02-11 00:30:06,642 INFO L87 Difference]: Start difference. First operand 682 states and 1964 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 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) [2022-02-11 00:30:07,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:30:07,458 INFO L93 Difference]: Finished difference Result 807 states and 2192 transitions. [2022-02-11 00:30:07,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-02-11 00:30:07,458 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 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 19 [2022-02-11 00:30:07,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:30:07,459 INFO L225 Difference]: With dead ends: 807 [2022-02-11 00:30:07,459 INFO L226 Difference]: Without dead ends: 805 [2022-02-11 00:30:07,459 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 323 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=228, Invalid=1412, Unknown=0, NotChecked=0, Total=1640 [2022-02-11 00:30:07,459 INFO L934 BasicCegarLoop]: 25 mSDtfsCounter, 171 mSDsluCounter, 581 mSDsCounter, 0 mSdLazyCounter, 959 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 171 SdHoareTripleChecker+Valid, 346 SdHoareTripleChecker+Invalid, 1002 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 959 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-11 00:30:07,459 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [171 Valid, 346 Invalid, 1002 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 959 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-11 00:30:07,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 805 states. [2022-02-11 00:30:07,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 805 to 679. [2022-02-11 00:30:07,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 679 states, 678 states have (on average 2.8805309734513274) internal successors, (1953), 678 states have internal predecessors, (1953), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:30:07,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 679 states to 679 states and 1953 transitions. [2022-02-11 00:30:07,467 INFO L78 Accepts]: Start accepts. Automaton has 679 states and 1953 transitions. Word has length 19 [2022-02-11 00:30:07,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:30:07,467 INFO L470 AbstractCegarLoop]: Abstraction has 679 states and 1953 transitions. [2022-02-11 00:30:07,467 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 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) [2022-02-11 00:30:07,467 INFO L276 IsEmpty]: Start isEmpty. Operand 679 states and 1953 transitions. [2022-02-11 00:30:07,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-02-11 00:30:07,468 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:30:07,468 INFO L515 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:30:07,485 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (216)] Ended with exit code 0 [2022-02-11 00:30:07,668 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable223,216 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:30:07,669 INFO L402 AbstractCegarLoop]: === Iteration 225 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:30:07,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:30:07,669 INFO L85 PathProgramCache]: Analyzing trace with hash -1500942737, now seen corresponding path program 216 times [2022-02-11 00:30:07,669 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:30:07,669 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1656795136] [2022-02-11 00:30:07,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:30:07,669 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:30:07,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:30:07,806 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:30:07,806 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:30:07,806 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1656795136] [2022-02-11 00:30:07,806 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1656795136] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:30:07,806 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1766200527] [2022-02-11 00:30:07,807 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-11 00:30:07,807 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:30:07,807 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:30:07,808 INFO L229 MonitoredProcess]: Starting monitored process 217 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:30:07,808 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (217)] Waiting until timeout for monitored process [2022-02-11 00:30:07,866 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-02-11 00:30:07,867 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:30:07,867 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-11 00:30:07,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:30:08,111 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 73 [2022-02-11 00:30:08,113 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 57 [2022-02-11 00:30:08,190 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:30:08,190 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:30:08,308 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:30:08,308 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 33 treesize of output 33 [2022-02-11 00:30:08,313 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:30:08,313 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 25 treesize of output 25 [2022-02-11 00:30:08,422 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:30:08,422 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1766200527] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:30:08,422 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:30:08,422 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-02-11 00:30:08,422 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1443320121] [2022-02-11 00:30:08,422 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:30:08,422 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-11 00:30:08,422 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:30:08,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-11 00:30:08,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=524, Unknown=0, NotChecked=0, Total=600 [2022-02-11 00:30:08,423 INFO L87 Difference]: Start difference. First operand 679 states and 1953 transitions. Second operand has 25 states, 25 states have (on average 1.48) internal successors, (37), 25 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) [2022-02-11 00:30:09,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:30:09,093 INFO L93 Difference]: Finished difference Result 864 states and 2337 transitions. [2022-02-11 00:30:09,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-02-11 00:30:09,093 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.48) internal successors, (37), 25 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 19 [2022-02-11 00:30:09,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:30:09,094 INFO L225 Difference]: With dead ends: 864 [2022-02-11 00:30:09,094 INFO L226 Difference]: Without dead ends: 862 [2022-02-11 00:30:09,094 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 313 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=217, Invalid=1423, Unknown=0, NotChecked=0, Total=1640 [2022-02-11 00:30:09,095 INFO L934 BasicCegarLoop]: 15 mSDtfsCounter, 270 mSDsluCounter, 351 mSDsCounter, 0 mSdLazyCounter, 732 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 270 SdHoareTripleChecker+Valid, 185 SdHoareTripleChecker+Invalid, 804 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 732 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-11 00:30:09,095 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [270 Valid, 185 Invalid, 804 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 732 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-11 00:30:09,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 862 states. [2022-02-11 00:30:09,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 862 to 690. [2022-02-11 00:30:09,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 690 states, 689 states have (on average 2.8867924528301887) internal successors, (1989), 689 states have internal predecessors, (1989), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:30:09,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 690 states to 690 states and 1989 transitions. [2022-02-11 00:30:09,103 INFO L78 Accepts]: Start accepts. Automaton has 690 states and 1989 transitions. Word has length 19 [2022-02-11 00:30:09,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:30:09,103 INFO L470 AbstractCegarLoop]: Abstraction has 690 states and 1989 transitions. [2022-02-11 00:30:09,103 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.48) internal successors, (37), 25 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) [2022-02-11 00:30:09,103 INFO L276 IsEmpty]: Start isEmpty. Operand 690 states and 1989 transitions. [2022-02-11 00:30:09,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-02-11 00:30:09,103 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:30:09,104 INFO L515 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:30:09,120 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (217)] Ended with exit code 0 [2022-02-11 00:30:09,304 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 217 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable224 [2022-02-11 00:30:09,304 INFO L402 AbstractCegarLoop]: === Iteration 226 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:30:09,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:30:09,304 INFO L85 PathProgramCache]: Analyzing trace with hash 645228023, now seen corresponding path program 217 times [2022-02-11 00:30:09,304 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:30:09,304 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1550210053] [2022-02-11 00:30:09,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:30:09,304 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:30:09,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:30:09,453 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:30:09,453 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:30:09,453 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1550210053] [2022-02-11 00:30:09,453 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1550210053] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:30:09,454 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [191667862] [2022-02-11 00:30:09,454 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-11 00:30:09,454 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:30:09,454 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:30:09,455 INFO L229 MonitoredProcess]: Starting monitored process 218 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:30:09,455 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (218)] Waiting until timeout for monitored process [2022-02-11 00:30:09,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:30:09,513 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 33 conjunts are in the unsatisfiable core [2022-02-11 00:30:09,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:30:09,847 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:30:09,848 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:30:10,082 INFO L353 Elim1Store]: treesize reduction 10, result has 65.5 percent of original size [2022-02-11 00:30:10,082 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 56 treesize of output 58 [2022-02-11 00:30:10,086 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:30:10,092 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:30:10,092 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 40 treesize of output 42 [2022-02-11 00:30:10,229 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:30:10,229 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [191667862] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:30:10,229 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:30:10,229 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 27 [2022-02-11 00:30:10,229 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [337599311] [2022-02-11 00:30:10,229 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:30:10,229 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-11 00:30:10,229 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:30:10,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-11 00:30:10,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=594, Unknown=0, NotChecked=0, Total=702 [2022-02-11 00:30:10,230 INFO L87 Difference]: Start difference. First operand 690 states and 1989 transitions. Second operand has 27 states, 27 states have (on average 1.4074074074074074) internal successors, (38), 27 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) [2022-02-11 00:30:10,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:30:10,780 INFO L93 Difference]: Finished difference Result 790 states and 2196 transitions. [2022-02-11 00:30:10,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-02-11 00:30:10,781 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.4074074074074074) internal successors, (38), 27 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 19 [2022-02-11 00:30:10,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:30:10,782 INFO L225 Difference]: With dead ends: 790 [2022-02-11 00:30:10,782 INFO L226 Difference]: Without dead ends: 790 [2022-02-11 00:30:10,782 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 246 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=209, Invalid=1123, Unknown=0, NotChecked=0, Total=1332 [2022-02-11 00:30:10,782 INFO L934 BasicCegarLoop]: 13 mSDtfsCounter, 142 mSDsluCounter, 332 mSDsCounter, 0 mSdLazyCounter, 649 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 683 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 649 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-11 00:30:10,783 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [142 Valid, 144 Invalid, 683 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 649 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-11 00:30:10,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 790 states. [2022-02-11 00:30:10,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 790 to 692. [2022-02-11 00:30:10,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 692 states, 691 states have (on average 2.885672937771346) internal successors, (1994), 691 states have internal predecessors, (1994), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:30:10,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 692 states to 692 states and 1994 transitions. [2022-02-11 00:30:10,790 INFO L78 Accepts]: Start accepts. Automaton has 692 states and 1994 transitions. Word has length 19 [2022-02-11 00:30:10,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:30:10,790 INFO L470 AbstractCegarLoop]: Abstraction has 692 states and 1994 transitions. [2022-02-11 00:30:10,790 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.4074074074074074) internal successors, (38), 27 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) [2022-02-11 00:30:10,790 INFO L276 IsEmpty]: Start isEmpty. Operand 692 states and 1994 transitions. [2022-02-11 00:30:10,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-02-11 00:30:10,791 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:30:10,791 INFO L515 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:30:10,807 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (218)] Forceful destruction successful, exit code 0 [2022-02-11 00:30:10,991 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 218 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable225 [2022-02-11 00:30:10,992 INFO L402 AbstractCegarLoop]: === Iteration 227 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:30:10,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:30:10,992 INFO L85 PathProgramCache]: Analyzing trace with hash -565930585, now seen corresponding path program 218 times [2022-02-11 00:30:10,992 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:30:10,992 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1380359980] [2022-02-11 00:30:10,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:30:10,992 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:30:10,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:30:11,103 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:30:11,104 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:30:11,104 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1380359980] [2022-02-11 00:30:11,104 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1380359980] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:30:11,104 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [703733876] [2022-02-11 00:30:11,104 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-11 00:30:11,104 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:30:11,104 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:30:11,105 INFO L229 MonitoredProcess]: Starting monitored process 219 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:30:11,106 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (219)] Waiting until timeout for monitored process [2022-02-11 00:30:11,166 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-11 00:30:11,166 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:30:11,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-11 00:30:11,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:30:11,437 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:30:11,437 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:30:11,619 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:30:11,619 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 41 treesize of output 39 [2022-02-11 00:30:11,624 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:30:11,624 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 29 treesize of output 27 [2022-02-11 00:30:11,710 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:30:11,710 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [703733876] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:30:11,710 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:30:11,710 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 27 [2022-02-11 00:30:11,710 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1641640994] [2022-02-11 00:30:11,710 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:30:11,710 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-11 00:30:11,710 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:30:11,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-11 00:30:11,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=625, Unknown=0, NotChecked=0, Total=702 [2022-02-11 00:30:11,711 INFO L87 Difference]: Start difference. First operand 692 states and 1994 transitions. Second operand has 27 states, 27 states have (on average 1.3703703703703705) internal successors, (37), 27 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) [2022-02-11 00:30:12,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:30:12,081 INFO L93 Difference]: Finished difference Result 745 states and 2102 transitions. [2022-02-11 00:30:12,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-02-11 00:30:12,081 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.3703703703703705) internal successors, (37), 27 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 19 [2022-02-11 00:30:12,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:30:12,082 INFO L225 Difference]: With dead ends: 745 [2022-02-11 00:30:12,082 INFO L226 Difference]: Without dead ends: 745 [2022-02-11 00:30:12,082 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=116, Invalid=876, Unknown=0, NotChecked=0, Total=992 [2022-02-11 00:30:12,083 INFO L934 BasicCegarLoop]: 9 mSDtfsCounter, 50 mSDsluCounter, 351 mSDsCounter, 0 mSdLazyCounter, 636 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 183 SdHoareTripleChecker+Invalid, 645 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 636 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-11 00:30:12,083 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 183 Invalid, 645 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 636 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-11 00:30:12,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 745 states. [2022-02-11 00:30:12,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 745 to 693. [2022-02-11 00:30:12,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 693 states, 692 states have (on average 2.8858381502890174) internal successors, (1997), 692 states have internal predecessors, (1997), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:30:12,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 693 states to 693 states and 1997 transitions. [2022-02-11 00:30:12,090 INFO L78 Accepts]: Start accepts. Automaton has 693 states and 1997 transitions. Word has length 19 [2022-02-11 00:30:12,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:30:12,090 INFO L470 AbstractCegarLoop]: Abstraction has 693 states and 1997 transitions. [2022-02-11 00:30:12,090 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.3703703703703705) internal successors, (37), 27 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) [2022-02-11 00:30:12,090 INFO L276 IsEmpty]: Start isEmpty. Operand 693 states and 1997 transitions. [2022-02-11 00:30:12,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-02-11 00:30:12,091 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:30:12,091 INFO L515 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:30:12,107 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (219)] Ended with exit code 0 [2022-02-11 00:30:12,291 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 219 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable226 [2022-02-11 00:30:12,292 INFO L402 AbstractCegarLoop]: === Iteration 228 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:30:12,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:30:12,292 INFO L85 PathProgramCache]: Analyzing trace with hash 319867695, now seen corresponding path program 219 times [2022-02-11 00:30:12,292 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:30:12,292 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1041263047] [2022-02-11 00:30:12,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:30:12,292 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:30:12,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:30:12,416 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:30:12,416 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:30:12,416 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1041263047] [2022-02-11 00:30:12,416 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1041263047] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:30:12,416 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [112442757] [2022-02-11 00:30:12,416 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-11 00:30:12,417 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:30:12,417 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:30:12,417 INFO L229 MonitoredProcess]: Starting monitored process 220 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:30:12,418 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (220)] Waiting until timeout for monitored process [2022-02-11 00:30:12,479 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-11 00:30:12,479 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:30:12,479 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-11 00:30:12,480 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:30:12,782 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:30:12,782 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:30:12,981 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:30:12,981 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 42 treesize of output 40 [2022-02-11 00:30:12,985 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:30:12,986 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 30 treesize of output 28 [2022-02-11 00:30:13,080 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:30:13,080 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [112442757] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:30:13,080 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:30:13,080 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 27 [2022-02-11 00:30:13,080 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [973213062] [2022-02-11 00:30:13,080 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:30:13,080 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-11 00:30:13,080 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:30:13,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-11 00:30:13,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=625, Unknown=0, NotChecked=0, Total=702 [2022-02-11 00:30:13,081 INFO L87 Difference]: Start difference. First operand 693 states and 1997 transitions. Second operand has 27 states, 27 states have (on average 1.3703703703703705) internal successors, (37), 27 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) [2022-02-11 00:30:13,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:30:13,795 INFO L93 Difference]: Finished difference Result 767 states and 2150 transitions. [2022-02-11 00:30:13,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-02-11 00:30:13,795 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.3703703703703705) internal successors, (37), 27 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 19 [2022-02-11 00:30:13,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:30:13,796 INFO L225 Difference]: With dead ends: 767 [2022-02-11 00:30:13,796 INFO L226 Difference]: Without dead ends: 767 [2022-02-11 00:30:13,796 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 267 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=212, Invalid=1594, Unknown=0, NotChecked=0, Total=1806 [2022-02-11 00:30:13,797 INFO L934 BasicCegarLoop]: 10 mSDtfsCounter, 74 mSDsluCounter, 258 mSDsCounter, 0 mSdLazyCounter, 502 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 152 SdHoareTripleChecker+Invalid, 542 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 502 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-11 00:30:13,797 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [74 Valid, 152 Invalid, 542 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 502 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-11 00:30:13,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 767 states. [2022-02-11 00:30:13,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 767 to 694. [2022-02-11 00:30:13,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 694 states, 693 states have (on average 2.886002886002886) internal successors, (2000), 693 states have internal predecessors, (2000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:30:13,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 694 states to 694 states and 2000 transitions. [2022-02-11 00:30:13,804 INFO L78 Accepts]: Start accepts. Automaton has 694 states and 2000 transitions. Word has length 19 [2022-02-11 00:30:13,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:30:13,804 INFO L470 AbstractCegarLoop]: Abstraction has 694 states and 2000 transitions. [2022-02-11 00:30:13,804 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.3703703703703705) internal successors, (37), 27 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) [2022-02-11 00:30:13,804 INFO L276 IsEmpty]: Start isEmpty. Operand 694 states and 2000 transitions. [2022-02-11 00:30:13,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-02-11 00:30:13,805 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:30:13,805 INFO L515 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:30:13,821 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (220)] Forceful destruction successful, exit code 0 [2022-02-11 00:30:14,005 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable227,220 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:30:14,006 INFO L402 AbstractCegarLoop]: === Iteration 229 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:30:14,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:30:14,006 INFO L85 PathProgramCache]: Analyzing trace with hash -1868315481, now seen corresponding path program 220 times [2022-02-11 00:30:14,006 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:30:14,006 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1621853658] [2022-02-11 00:30:14,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:30:14,006 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:30:14,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:30:14,128 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:30:14,129 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:30:14,129 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1621853658] [2022-02-11 00:30:14,129 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1621853658] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:30:14,129 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [441859665] [2022-02-11 00:30:14,129 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-11 00:30:14,129 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:30:14,129 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:30:14,130 INFO L229 MonitoredProcess]: Starting monitored process 221 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:30:14,130 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (221)] Waiting until timeout for monitored process [2022-02-11 00:30:14,192 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-11 00:30:14,193 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:30:14,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-11 00:30:14,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:30:14,515 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:30:14,515 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:30:14,706 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:30:14,707 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 42 treesize of output 40 [2022-02-11 00:30:14,712 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:30:14,712 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 30 treesize of output 28 [2022-02-11 00:30:14,796 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:30:14,796 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [441859665] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:30:14,796 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:30:14,796 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 27 [2022-02-11 00:30:14,797 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2123023881] [2022-02-11 00:30:14,797 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:30:14,797 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-11 00:30:14,797 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:30:14,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-11 00:30:14,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=624, Unknown=0, NotChecked=0, Total=702 [2022-02-11 00:30:14,797 INFO L87 Difference]: Start difference. First operand 694 states and 2000 transitions. Second operand has 27 states, 27 states have (on average 1.3703703703703705) internal successors, (37), 27 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) [2022-02-11 00:30:15,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:30:15,733 INFO L93 Difference]: Finished difference Result 782 states and 2180 transitions. [2022-02-11 00:30:15,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-02-11 00:30:15,734 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.3703703703703705) internal successors, (37), 27 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 19 [2022-02-11 00:30:15,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:30:15,735 INFO L225 Difference]: With dead ends: 782 [2022-02-11 00:30:15,735 INFO L226 Difference]: Without dead ends: 782 [2022-02-11 00:30:15,735 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 281 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=224, Invalid=1668, Unknown=0, NotChecked=0, Total=1892 [2022-02-11 00:30:15,735 INFO L934 BasicCegarLoop]: 15 mSDtfsCounter, 69 mSDsluCounter, 397 mSDsCounter, 0 mSdLazyCounter, 967 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 278 SdHoareTripleChecker+Invalid, 1002 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 967 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-11 00:30:15,735 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 278 Invalid, 1002 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 967 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-11 00:30:15,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 782 states. [2022-02-11 00:30:15,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 782 to 695. [2022-02-11 00:30:15,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 695 states, 694 states have (on average 2.8861671469740635) internal successors, (2003), 694 states have internal predecessors, (2003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:30:15,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 695 states to 695 states and 2003 transitions. [2022-02-11 00:30:15,743 INFO L78 Accepts]: Start accepts. Automaton has 695 states and 2003 transitions. Word has length 19 [2022-02-11 00:30:15,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:30:15,744 INFO L470 AbstractCegarLoop]: Abstraction has 695 states and 2003 transitions. [2022-02-11 00:30:15,744 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.3703703703703705) internal successors, (37), 27 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) [2022-02-11 00:30:15,744 INFO L276 IsEmpty]: Start isEmpty. Operand 695 states and 2003 transitions. [2022-02-11 00:30:15,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-02-11 00:30:15,744 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:30:15,745 INFO L515 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:30:15,761 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (221)] Forceful destruction successful, exit code 0 [2022-02-11 00:30:15,961 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 221 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable228 [2022-02-11 00:30:15,962 INFO L402 AbstractCegarLoop]: === Iteration 230 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:30:15,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:30:15,962 INFO L85 PathProgramCache]: Analyzing trace with hash -1082261461, now seen corresponding path program 221 times [2022-02-11 00:30:15,962 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:30:15,962 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [531990405] [2022-02-11 00:30:15,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:30:15,962 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:30:15,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:30:16,087 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:30:16,088 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:30:16,088 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [531990405] [2022-02-11 00:30:16,088 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [531990405] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:30:16,088 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [964341585] [2022-02-11 00:30:16,088 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-11 00:30:16,088 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:30:16,088 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:30:16,089 INFO L229 MonitoredProcess]: Starting monitored process 222 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:30:16,099 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (222)] Waiting until timeout for monitored process [2022-02-11 00:30:16,161 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-02-11 00:30:16,161 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:30:16,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-11 00:30:16,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:30:16,490 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 98 treesize of output 82 [2022-02-11 00:30:16,492 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 82 treesize of output 66 [2022-02-11 00:30:16,565 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:30:16,566 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:30:16,731 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:30:16,731 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 73 treesize of output 67 [2022-02-11 00:30:16,738 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:30:16,739 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 57 treesize of output 51 [2022-02-11 00:30:16,916 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:30:16,916 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [964341585] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:30:16,916 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:30:16,916 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 27 [2022-02-11 00:30:16,916 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1783901548] [2022-02-11 00:30:16,916 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:30:16,916 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-11 00:30:16,916 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:30:16,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-11 00:30:16,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=605, Unknown=0, NotChecked=0, Total=702 [2022-02-11 00:30:16,917 INFO L87 Difference]: Start difference. First operand 695 states and 2003 transitions. Second operand has 27 states, 27 states have (on average 1.4074074074074074) internal successors, (38), 27 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) [2022-02-11 00:30:17,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:30:17,382 INFO L93 Difference]: Finished difference Result 782 states and 2153 transitions. [2022-02-11 00:30:17,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-02-11 00:30:17,382 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.4074074074074074) internal successors, (38), 27 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 19 [2022-02-11 00:30:17,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:30:17,383 INFO L225 Difference]: With dead ends: 782 [2022-02-11 00:30:17,383 INFO L226 Difference]: Without dead ends: 780 [2022-02-11 00:30:17,384 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=147, Invalid=975, Unknown=0, NotChecked=0, Total=1122 [2022-02-11 00:30:17,384 INFO L934 BasicCegarLoop]: 24 mSDtfsCounter, 73 mSDsluCounter, 488 mSDsCounter, 0 mSdLazyCounter, 616 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 340 SdHoareTripleChecker+Invalid, 649 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 616 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-11 00:30:17,384 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [73 Valid, 340 Invalid, 649 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 616 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-11 00:30:17,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 780 states. [2022-02-11 00:30:17,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 780 to 694. [2022-02-11 00:30:17,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 694 states, 693 states have (on average 2.8845598845598848) internal successors, (1999), 693 states have internal predecessors, (1999), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:30:17,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 694 states to 694 states and 1999 transitions. [2022-02-11 00:30:17,392 INFO L78 Accepts]: Start accepts. Automaton has 694 states and 1999 transitions. Word has length 19 [2022-02-11 00:30:17,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:30:17,392 INFO L470 AbstractCegarLoop]: Abstraction has 694 states and 1999 transitions. [2022-02-11 00:30:17,392 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.4074074074074074) internal successors, (38), 27 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) [2022-02-11 00:30:17,392 INFO L276 IsEmpty]: Start isEmpty. Operand 694 states and 1999 transitions. [2022-02-11 00:30:17,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-02-11 00:30:17,393 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:30:17,393 INFO L515 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:30:17,409 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (222)] Ended with exit code 0 [2022-02-11 00:30:17,593 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable229,222 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:30:17,593 INFO L402 AbstractCegarLoop]: === Iteration 231 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:30:17,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:30:17,594 INFO L85 PathProgramCache]: Analyzing trace with hash 730079219, now seen corresponding path program 222 times [2022-02-11 00:30:17,594 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:30:17,594 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1397356617] [2022-02-11 00:30:17,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:30:17,594 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:30:17,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:30:17,721 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:30:17,721 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:30:17,722 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1397356617] [2022-02-11 00:30:17,722 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1397356617] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:30:17,722 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [311236091] [2022-02-11 00:30:17,722 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-11 00:30:17,722 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:30:17,722 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:30:17,723 INFO L229 MonitoredProcess]: Starting monitored process 223 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:30:17,723 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (223)] Waiting until timeout for monitored process [2022-02-11 00:30:17,782 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-11 00:30:17,782 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:30:17,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-11 00:30:17,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:30:18,098 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:30:18,099 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:30:18,269 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:30:18,270 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 42 treesize of output 40 [2022-02-11 00:30:18,274 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:30:18,275 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 30 treesize of output 28 [2022-02-11 00:30:18,385 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:30:18,386 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [311236091] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:30:18,386 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:30:18,386 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-02-11 00:30:18,386 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [615582142] [2022-02-11 00:30:18,386 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:30:18,386 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-11 00:30:18,386 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:30:18,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-11 00:30:18,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=562, Unknown=0, NotChecked=0, Total=650 [2022-02-11 00:30:18,386 INFO L87 Difference]: Start difference. First operand 694 states and 1999 transitions. Second operand has 26 states, 26 states have (on average 1.5384615384615385) internal successors, (40), 26 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) [2022-02-11 00:30:18,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:30:18,607 INFO L93 Difference]: Finished difference Result 779 states and 2170 transitions. [2022-02-11 00:30:18,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-02-11 00:30:18,607 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.5384615384615385) internal successors, (40), 26 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 19 [2022-02-11 00:30:18,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:30:18,608 INFO L225 Difference]: With dead ends: 779 [2022-02-11 00:30:18,608 INFO L226 Difference]: Without dead ends: 779 [2022-02-11 00:30:18,609 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=92, Invalid=610, Unknown=0, NotChecked=0, Total=702 [2022-02-11 00:30:18,609 INFO L934 BasicCegarLoop]: 11 mSDtfsCounter, 35 mSDsluCounter, 225 mSDsCounter, 0 mSdLazyCounter, 509 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 520 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 509 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-11 00:30:18,609 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 131 Invalid, 520 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 509 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-11 00:30:18,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 779 states. [2022-02-11 00:30:18,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 779 to 689. [2022-02-11 00:30:18,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 689 states, 688 states have (on average 2.883720930232558) internal successors, (1984), 688 states have internal predecessors, (1984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:30:18,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 689 states to 689 states and 1984 transitions. [2022-02-11 00:30:18,617 INFO L78 Accepts]: Start accepts. Automaton has 689 states and 1984 transitions. Word has length 19 [2022-02-11 00:30:18,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:30:18,617 INFO L470 AbstractCegarLoop]: Abstraction has 689 states and 1984 transitions. [2022-02-11 00:30:18,617 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.5384615384615385) internal successors, (40), 26 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) [2022-02-11 00:30:18,617 INFO L276 IsEmpty]: Start isEmpty. Operand 689 states and 1984 transitions. [2022-02-11 00:30:18,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-02-11 00:30:18,618 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:30:18,618 INFO L515 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:30:18,634 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (223)] Ended with exit code 0 [2022-02-11 00:30:18,818 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable230,223 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:30:18,818 INFO L402 AbstractCegarLoop]: === Iteration 232 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:30:18,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:30:18,818 INFO L85 PathProgramCache]: Analyzing trace with hash 670249895, now seen corresponding path program 223 times [2022-02-11 00:30:18,818 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:30:18,818 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [647614868] [2022-02-11 00:30:18,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:30:18,819 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:30:18,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:30:18,947 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:30:18,948 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:30:18,948 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [647614868] [2022-02-11 00:30:18,948 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [647614868] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:30:18,948 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [46060518] [2022-02-11 00:30:18,948 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-11 00:30:18,948 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:30:18,948 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:30:18,949 INFO L229 MonitoredProcess]: Starting monitored process 224 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:30:18,949 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (224)] Waiting until timeout for monitored process [2022-02-11 00:30:19,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:30:19,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-11 00:30:19,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:30:19,311 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:30:19,311 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:30:19,480 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:30:19,480 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 42 treesize of output 40 [2022-02-11 00:30:19,485 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:30:19,485 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 30 treesize of output 28 [2022-02-11 00:30:19,585 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:30:19,585 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [46060518] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:30:19,585 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:30:19,586 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-02-11 00:30:19,586 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715717917] [2022-02-11 00:30:19,586 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:30:19,586 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-11 00:30:19,586 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:30:19,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-11 00:30:19,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=562, Unknown=0, NotChecked=0, Total=650 [2022-02-11 00:30:19,586 INFO L87 Difference]: Start difference. First operand 689 states and 1984 transitions. Second operand has 26 states, 26 states have (on average 1.3846153846153846) internal successors, (36), 26 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) [2022-02-11 00:30:20,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:30:20,178 INFO L93 Difference]: Finished difference Result 808 states and 2226 transitions. [2022-02-11 00:30:20,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-02-11 00:30:20,178 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.3846153846153846) internal successors, (36), 26 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 19 [2022-02-11 00:30:20,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:30:20,179 INFO L225 Difference]: With dead ends: 808 [2022-02-11 00:30:20,179 INFO L226 Difference]: Without dead ends: 808 [2022-02-11 00:30:20,179 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 304 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=198, Invalid=1284, Unknown=0, NotChecked=0, Total=1482 [2022-02-11 00:30:20,180 INFO L934 BasicCegarLoop]: 11 mSDtfsCounter, 37 mSDsluCounter, 247 mSDsCounter, 0 mSdLazyCounter, 625 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 643 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 625 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-11 00:30:20,180 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 156 Invalid, 643 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 625 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-11 00:30:20,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 808 states. [2022-02-11 00:30:20,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 808 to 684. [2022-02-11 00:30:20,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 684 states, 683 states have (on average 2.8814055636896048) internal successors, (1968), 683 states have internal predecessors, (1968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:30:20,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 684 states to 684 states and 1968 transitions. [2022-02-11 00:30:20,191 INFO L78 Accepts]: Start accepts. Automaton has 684 states and 1968 transitions. Word has length 19 [2022-02-11 00:30:20,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:30:20,192 INFO L470 AbstractCegarLoop]: Abstraction has 684 states and 1968 transitions. [2022-02-11 00:30:20,192 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.3846153846153846) internal successors, (36), 26 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) [2022-02-11 00:30:20,192 INFO L276 IsEmpty]: Start isEmpty. Operand 684 states and 1968 transitions. [2022-02-11 00:30:20,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-02-11 00:30:20,192 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:30:20,192 INFO L515 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:30:20,209 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (224)] Forceful destruction successful, exit code 0 [2022-02-11 00:30:20,393 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable231,224 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:30:20,393 INFO L402 AbstractCegarLoop]: === Iteration 233 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:30:20,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:30:20,393 INFO L85 PathProgramCache]: Analyzing trace with hash 1456303915, now seen corresponding path program 224 times [2022-02-11 00:30:20,393 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:30:20,393 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2138662369] [2022-02-11 00:30:20,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:30:20,394 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:30:20,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:30:20,519 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:30:20,519 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:30:20,519 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2138662369] [2022-02-11 00:30:20,519 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2138662369] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:30:20,519 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [977462438] [2022-02-11 00:30:20,519 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-11 00:30:20,519 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:30:20,519 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:30:20,520 INFO L229 MonitoredProcess]: Starting monitored process 225 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:30:20,521 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (225)] Waiting until timeout for monitored process [2022-02-11 00:30:20,580 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-11 00:30:20,580 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:30:20,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-11 00:30:20,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:30:20,884 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 98 treesize of output 82 [2022-02-11 00:30:20,886 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 82 treesize of output 66 [2022-02-11 00:30:20,956 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:30:20,956 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:30:21,074 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:30:21,074 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 73 treesize of output 67 [2022-02-11 00:30:21,081 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:30:21,081 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 57 treesize of output 51 [2022-02-11 00:30:21,247 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:30:21,247 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [977462438] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:30:21,247 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:30:21,247 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-02-11 00:30:21,248 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2078996582] [2022-02-11 00:30:21,248 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:30:21,248 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-11 00:30:21,248 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:30:21,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-11 00:30:21,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=548, Unknown=0, NotChecked=0, Total=650 [2022-02-11 00:30:21,248 INFO L87 Difference]: Start difference. First operand 684 states and 1968 transitions. Second operand has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 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) [2022-02-11 00:30:21,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:30:21,682 INFO L93 Difference]: Finished difference Result 756 states and 2097 transitions. [2022-02-11 00:30:21,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-02-11 00:30:21,683 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 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 19 [2022-02-11 00:30:21,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:30:21,684 INFO L225 Difference]: With dead ends: 756 [2022-02-11 00:30:21,684 INFO L226 Difference]: Without dead ends: 754 [2022-02-11 00:30:21,684 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=184, Invalid=938, Unknown=0, NotChecked=0, Total=1122 [2022-02-11 00:30:21,684 INFO L934 BasicCegarLoop]: 17 mSDtfsCounter, 106 mSDsluCounter, 361 mSDsCounter, 0 mSdLazyCounter, 612 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 220 SdHoareTripleChecker+Invalid, 638 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 612 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-11 00:30:21,684 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [106 Valid, 220 Invalid, 638 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 612 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-11 00:30:21,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 754 states. [2022-02-11 00:30:21,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 754 to 682. [2022-02-11 00:30:21,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 682 states, 681 states have (on average 2.8751835535976507) internal successors, (1958), 681 states have internal predecessors, (1958), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:30:21,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 682 states to 682 states and 1958 transitions. [2022-02-11 00:30:21,691 INFO L78 Accepts]: Start accepts. Automaton has 682 states and 1958 transitions. Word has length 19 [2022-02-11 00:30:21,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:30:21,691 INFO L470 AbstractCegarLoop]: Abstraction has 682 states and 1958 transitions. [2022-02-11 00:30:21,692 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 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) [2022-02-11 00:30:21,692 INFO L276 IsEmpty]: Start isEmpty. Operand 682 states and 1958 transitions. [2022-02-11 00:30:21,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-02-11 00:30:21,692 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:30:21,692 INFO L515 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:30:21,708 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (225)] Ended with exit code 0 [2022-02-11 00:30:21,903 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable232,225 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:30:21,903 INFO L402 AbstractCegarLoop]: === Iteration 234 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:30:21,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:30:21,903 INFO L85 PathProgramCache]: Analyzing trace with hash 295679727, now seen corresponding path program 225 times [2022-02-11 00:30:21,904 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:30:21,904 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [298002140] [2022-02-11 00:30:21,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:30:21,904 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:30:21,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:30:22,018 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 7 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-11 00:30:22,019 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:30:22,019 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [298002140] [2022-02-11 00:30:22,019 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [298002140] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:30:22,019 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1820881968] [2022-02-11 00:30:22,019 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-11 00:30:22,019 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:30:22,019 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:30:22,020 INFO L229 MonitoredProcess]: Starting monitored process 226 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:30:22,020 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (226)] Waiting until timeout for monitored process [2022-02-11 00:30:22,082 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-02-11 00:30:22,082 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:30:22,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-11 00:30:22,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:30:22,270 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 96 treesize of output 80 [2022-02-11 00:30:22,272 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 80 treesize of output 64 [2022-02-11 00:30:22,439 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:30:22,439 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:30:22,579 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-11 00:30:22,579 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 63 treesize of output 54 [2022-02-11 00:30:22,583 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 32 [2022-02-11 00:30:22,682 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 10 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:30:22,682 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1820881968] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:30:22,682 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:30:22,682 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11, 11] total 25 [2022-02-11 00:30:22,682 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1387611560] [2022-02-11 00:30:22,682 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:30:22,682 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-11 00:30:22,682 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:30:22,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-11 00:30:22,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=472, Unknown=0, NotChecked=0, Total=600 [2022-02-11 00:30:22,683 INFO L87 Difference]: Start difference. First operand 682 states and 1958 transitions. Second operand has 25 states, 25 states have (on average 1.52) internal successors, (38), 25 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) [2022-02-11 00:30:23,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:30:23,268 INFO L93 Difference]: Finished difference Result 930 states and 2569 transitions. [2022-02-11 00:30:23,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-02-11 00:30:23,268 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.52) internal successors, (38), 25 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 19 [2022-02-11 00:30:23,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:30:23,269 INFO L225 Difference]: With dead ends: 930 [2022-02-11 00:30:23,269 INFO L226 Difference]: Without dead ends: 930 [2022-02-11 00:30:23,269 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 321 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=289, Invalid=1043, Unknown=0, NotChecked=0, Total=1332 [2022-02-11 00:30:23,270 INFO L934 BasicCegarLoop]: 14 mSDtfsCounter, 126 mSDsluCounter, 310 mSDsCounter, 0 mSdLazyCounter, 711 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 181 SdHoareTripleChecker+Invalid, 767 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 711 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-11 00:30:23,270 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [126 Valid, 181 Invalid, 767 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 711 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-11 00:30:23,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 930 states. [2022-02-11 00:30:23,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 930 to 743. [2022-02-11 00:30:23,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 743 states, 742 states have (on average 2.944743935309973) internal successors, (2185), 742 states have internal predecessors, (2185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:30:23,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 743 states to 743 states and 2185 transitions. [2022-02-11 00:30:23,278 INFO L78 Accepts]: Start accepts. Automaton has 743 states and 2185 transitions. Word has length 19 [2022-02-11 00:30:23,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:30:23,279 INFO L470 AbstractCegarLoop]: Abstraction has 743 states and 2185 transitions. [2022-02-11 00:30:23,279 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.52) internal successors, (38), 25 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) [2022-02-11 00:30:23,279 INFO L276 IsEmpty]: Start isEmpty. Operand 743 states and 2185 transitions. [2022-02-11 00:30:23,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-02-11 00:30:23,279 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:30:23,279 INFO L515 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:30:23,296 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (226)] Ended with exit code 0 [2022-02-11 00:30:23,480 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 226 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable233 [2022-02-11 00:30:23,480 INFO L402 AbstractCegarLoop]: === Iteration 235 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:30:23,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:30:23,480 INFO L85 PathProgramCache]: Analyzing trace with hash -1064437013, now seen corresponding path program 226 times [2022-02-11 00:30:23,480 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:30:23,480 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [122483069] [2022-02-11 00:30:23,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:30:23,480 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:30:23,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:30:23,641 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:30:23,642 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:30:23,642 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [122483069] [2022-02-11 00:30:23,642 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [122483069] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:30:23,642 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1268130889] [2022-02-11 00:30:23,642 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-11 00:30:23,642 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:30:23,642 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:30:23,643 INFO L229 MonitoredProcess]: Starting monitored process 227 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:30:23,643 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (227)] Waiting until timeout for monitored process [2022-02-11 00:30:23,702 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-11 00:30:23,703 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:30:23,703 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-11 00:30:23,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:30:23,987 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:30:23,988 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:30:24,122 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:30:24,122 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 34 treesize of output 34 [2022-02-11 00:30:24,127 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:30:24,127 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 26 treesize of output 26 [2022-02-11 00:30:24,266 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:30:24,266 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1268130889] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:30:24,266 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:30:24,266 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-02-11 00:30:24,266 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [743374832] [2022-02-11 00:30:24,266 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:30:24,266 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-11 00:30:24,266 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:30:24,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-11 00:30:24,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=560, Unknown=0, NotChecked=0, Total=650 [2022-02-11 00:30:24,267 INFO L87 Difference]: Start difference. First operand 743 states and 2185 transitions. Second operand has 26 states, 26 states have (on average 1.4615384615384615) internal successors, (38), 26 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) [2022-02-11 00:30:24,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:30:24,803 INFO L93 Difference]: Finished difference Result 858 states and 2411 transitions. [2022-02-11 00:30:24,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-02-11 00:30:24,804 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.4615384615384615) internal successors, (38), 26 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 19 [2022-02-11 00:30:24,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:30:24,805 INFO L225 Difference]: With dead ends: 858 [2022-02-11 00:30:24,805 INFO L226 Difference]: Without dead ends: 858 [2022-02-11 00:30:24,805 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=159, Invalid=963, Unknown=0, NotChecked=0, Total=1122 [2022-02-11 00:30:24,805 INFO L934 BasicCegarLoop]: 17 mSDtfsCounter, 84 mSDsluCounter, 414 mSDsCounter, 0 mSdLazyCounter, 807 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 260 SdHoareTripleChecker+Invalid, 851 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 807 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-11 00:30:24,805 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 260 Invalid, 851 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 807 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-11 00:30:24,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 858 states. [2022-02-11 00:30:24,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 858 to 741. [2022-02-11 00:30:24,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 741 states, 740 states have (on average 2.945945945945946) internal successors, (2180), 740 states have internal predecessors, (2180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:30:24,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 741 states to 741 states and 2180 transitions. [2022-02-11 00:30:24,814 INFO L78 Accepts]: Start accepts. Automaton has 741 states and 2180 transitions. Word has length 19 [2022-02-11 00:30:24,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:30:24,814 INFO L470 AbstractCegarLoop]: Abstraction has 741 states and 2180 transitions. [2022-02-11 00:30:24,814 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.4615384615384615) internal successors, (38), 26 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) [2022-02-11 00:30:24,815 INFO L276 IsEmpty]: Start isEmpty. Operand 741 states and 2180 transitions. [2022-02-11 00:30:24,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-02-11 00:30:24,815 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:30:24,815 INFO L515 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:30:24,831 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (227)] Ended with exit code 0 [2022-02-11 00:30:25,016 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 227 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable234 [2022-02-11 00:30:25,016 INFO L402 AbstractCegarLoop]: === Iteration 236 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:30:25,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:30:25,016 INFO L85 PathProgramCache]: Analyzing trace with hash -262922197, now seen corresponding path program 227 times [2022-02-11 00:30:25,016 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:30:25,016 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [755141308] [2022-02-11 00:30:25,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:30:25,016 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:30:25,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:30:25,165 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:30:25,166 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:30:25,166 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [755141308] [2022-02-11 00:30:25,166 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [755141308] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:30:25,166 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1714673782] [2022-02-11 00:30:25,166 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-11 00:30:25,166 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:30:25,166 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:30:25,167 INFO L229 MonitoredProcess]: Starting monitored process 228 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:30:25,167 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (228)] Waiting until timeout for monitored process [2022-02-11 00:30:25,230 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-02-11 00:30:25,230 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:30:25,231 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 33 conjunts are in the unsatisfiable core [2022-02-11 00:30:25,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:30:25,524 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 98 treesize of output 82 [2022-02-11 00:30:25,526 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 82 treesize of output 66 [2022-02-11 00:30:25,598 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:30:25,598 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:30:25,698 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:30:25,698 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 65 treesize of output 61 [2022-02-11 00:30:25,705 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:30:25,705 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 53 treesize of output 49 [2022-02-11 00:30:25,876 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:30:25,877 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1714673782] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:30:25,877 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:30:25,877 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-02-11 00:30:25,877 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1422914802] [2022-02-11 00:30:25,877 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:30:25,877 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-11 00:30:25,877 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:30:25,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-11 00:30:25,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=554, Unknown=0, NotChecked=0, Total=650 [2022-02-11 00:30:25,877 INFO L87 Difference]: Start difference. First operand 741 states and 2180 transitions. Second operand has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 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) [2022-02-11 00:30:26,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:30:26,483 INFO L93 Difference]: Finished difference Result 846 states and 2371 transitions. [2022-02-11 00:30:26,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-02-11 00:30:26,483 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 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 19 [2022-02-11 00:30:26,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:30:26,484 INFO L225 Difference]: With dead ends: 846 [2022-02-11 00:30:26,484 INFO L226 Difference]: Without dead ends: 844 [2022-02-11 00:30:26,484 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 332 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=232, Invalid=1328, Unknown=0, NotChecked=0, Total=1560 [2022-02-11 00:30:26,484 INFO L934 BasicCegarLoop]: 17 mSDtfsCounter, 144 mSDsluCounter, 348 mSDsCounter, 0 mSdLazyCounter, 642 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 211 SdHoareTripleChecker+Invalid, 694 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 642 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-11 00:30:26,484 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [144 Valid, 211 Invalid, 694 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 642 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-11 00:30:26,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 844 states. [2022-02-11 00:30:26,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 844 to 743. [2022-02-11 00:30:26,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 743 states, 742 states have (on average 2.940700808625337) internal successors, (2182), 742 states have internal predecessors, (2182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:30:26,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 743 states to 743 states and 2182 transitions. [2022-02-11 00:30:26,492 INFO L78 Accepts]: Start accepts. Automaton has 743 states and 2182 transitions. Word has length 19 [2022-02-11 00:30:26,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:30:26,493 INFO L470 AbstractCegarLoop]: Abstraction has 743 states and 2182 transitions. [2022-02-11 00:30:26,493 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 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) [2022-02-11 00:30:26,493 INFO L276 IsEmpty]: Start isEmpty. Operand 743 states and 2182 transitions. [2022-02-11 00:30:26,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-02-11 00:30:26,493 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:30:26,493 INFO L515 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:30:26,509 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (228)] Ended with exit code 0 [2022-02-11 00:30:26,694 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 228 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable235 [2022-02-11 00:30:26,694 INFO L402 AbstractCegarLoop]: === Iteration 237 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:30:26,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:30:26,694 INFO L85 PathProgramCache]: Analyzing trace with hash 1843861923, now seen corresponding path program 228 times [2022-02-11 00:30:26,694 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:30:26,694 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1618050665] [2022-02-11 00:30:26,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:30:26,694 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:30:26,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:30:26,838 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:30:26,839 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:30:26,839 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1618050665] [2022-02-11 00:30:26,839 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1618050665] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:30:26,839 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1191508758] [2022-02-11 00:30:26,839 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-11 00:30:26,839 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:30:26,839 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:30:26,840 INFO L229 MonitoredProcess]: Starting monitored process 229 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:30:26,840 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (229)] Waiting until timeout for monitored process [2022-02-11 00:30:26,902 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-02-11 00:30:26,902 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:30:26,903 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-11 00:30:26,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:30:27,167 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 87 treesize of output 71 [2022-02-11 00:30:27,169 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 55 [2022-02-11 00:30:27,242 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:30:27,243 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:30:27,368 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:30:27,369 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 34 treesize of output 34 [2022-02-11 00:30:27,373 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:30:27,373 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 26 treesize of output 26 [2022-02-11 00:30:27,496 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:30:27,497 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1191508758] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:30:27,497 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:30:27,497 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-02-11 00:30:27,497 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [467318932] [2022-02-11 00:30:27,497 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:30:27,497 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-11 00:30:27,497 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:30:27,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-11 00:30:27,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=562, Unknown=0, NotChecked=0, Total=650 [2022-02-11 00:30:27,497 INFO L87 Difference]: Start difference. First operand 743 states and 2182 transitions. Second operand has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 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) [2022-02-11 00:30:28,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:30:28,257 INFO L93 Difference]: Finished difference Result 896 states and 2514 transitions. [2022-02-11 00:30:28,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-02-11 00:30:28,257 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 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 19 [2022-02-11 00:30:28,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:30:28,259 INFO L225 Difference]: With dead ends: 896 [2022-02-11 00:30:28,259 INFO L226 Difference]: Without dead ends: 891 [2022-02-11 00:30:28,259 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 417 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=285, Invalid=1695, Unknown=0, NotChecked=0, Total=1980 [2022-02-11 00:30:28,259 INFO L934 BasicCegarLoop]: 9 mSDtfsCounter, 123 mSDsluCounter, 268 mSDsCounter, 0 mSdLazyCounter, 633 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 683 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 633 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-11 00:30:28,259 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [123 Valid, 141 Invalid, 683 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 633 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-11 00:30:28,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 891 states. [2022-02-11 00:30:28,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 891 to 746. [2022-02-11 00:30:28,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 746 states, 745 states have (on average 2.9355704697986575) internal successors, (2187), 745 states have internal predecessors, (2187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:30:28,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 746 states to 746 states and 2187 transitions. [2022-02-11 00:30:28,268 INFO L78 Accepts]: Start accepts. Automaton has 746 states and 2187 transitions. Word has length 19 [2022-02-11 00:30:28,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:30:28,268 INFO L470 AbstractCegarLoop]: Abstraction has 746 states and 2187 transitions. [2022-02-11 00:30:28,268 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 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) [2022-02-11 00:30:28,268 INFO L276 IsEmpty]: Start isEmpty. Operand 746 states and 2187 transitions. [2022-02-11 00:30:28,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-02-11 00:30:28,269 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:30:28,269 INFO L515 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:30:28,285 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (229)] Ended with exit code 0 [2022-02-11 00:30:28,472 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable236,229 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:30:28,472 INFO L402 AbstractCegarLoop]: === Iteration 238 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:30:28,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:30:28,472 INFO L85 PathProgramCache]: Analyzing trace with hash -304934613, now seen corresponding path program 229 times [2022-02-11 00:30:28,472 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:30:28,472 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [66969677] [2022-02-11 00:30:28,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:30:28,472 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:30:28,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:30:28,629 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:30:28,629 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:30:28,629 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [66969677] [2022-02-11 00:30:28,629 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [66969677] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:30:28,629 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [483218932] [2022-02-11 00:30:28,629 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-11 00:30:28,629 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:30:28,629 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:30:28,630 INFO L229 MonitoredProcess]: Starting monitored process 230 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:30:28,631 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (230)] Waiting until timeout for monitored process [2022-02-11 00:30:28,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:30:28,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 33 conjunts are in the unsatisfiable core [2022-02-11 00:30:28,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:30:28,995 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:30:28,995 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:30:29,132 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:30:29,132 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 35 treesize of output 35 [2022-02-11 00:30:29,137 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:30:29,137 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 27 treesize of output 27 [2022-02-11 00:30:29,276 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:30:29,276 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [483218932] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:30:29,276 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:30:29,276 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-02-11 00:30:29,276 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1125990302] [2022-02-11 00:30:29,276 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:30:29,276 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-11 00:30:29,276 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:30:29,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-11 00:30:29,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=560, Unknown=0, NotChecked=0, Total=650 [2022-02-11 00:30:29,277 INFO L87 Difference]: Start difference. First operand 746 states and 2187 transitions. Second operand has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 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) [2022-02-11 00:30:29,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:30:29,824 INFO L93 Difference]: Finished difference Result 845 states and 2406 transitions. [2022-02-11 00:30:29,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-02-11 00:30:29,825 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 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 19 [2022-02-11 00:30:29,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:30:29,826 INFO L225 Difference]: With dead ends: 845 [2022-02-11 00:30:29,826 INFO L226 Difference]: Without dead ends: 845 [2022-02-11 00:30:29,826 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 248 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=170, Invalid=1090, Unknown=0, NotChecked=0, Total=1260 [2022-02-11 00:30:29,826 INFO L934 BasicCegarLoop]: 8 mSDtfsCounter, 86 mSDsluCounter, 243 mSDsCounter, 0 mSdLazyCounter, 566 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 593 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 566 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-11 00:30:29,826 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [86 Valid, 109 Invalid, 593 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 566 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-11 00:30:29,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 845 states. [2022-02-11 00:30:29,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 845 to 746. [2022-02-11 00:30:29,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 746 states, 745 states have (on average 2.934228187919463) internal successors, (2186), 745 states have internal predecessors, (2186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:30:29,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 746 states to 746 states and 2186 transitions. [2022-02-11 00:30:29,834 INFO L78 Accepts]: Start accepts. Automaton has 746 states and 2186 transitions. Word has length 19 [2022-02-11 00:30:29,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:30:29,834 INFO L470 AbstractCegarLoop]: Abstraction has 746 states and 2186 transitions. [2022-02-11 00:30:29,835 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 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) [2022-02-11 00:30:29,835 INFO L276 IsEmpty]: Start isEmpty. Operand 746 states and 2186 transitions. [2022-02-11 00:30:29,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-02-11 00:30:29,835 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:30:29,835 INFO L515 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:30:29,851 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (230)] Ended with exit code 0 [2022-02-11 00:30:30,036 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable237,230 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:30:30,036 INFO L402 AbstractCegarLoop]: === Iteration 239 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:30:30,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:30:30,036 INFO L85 PathProgramCache]: Analyzing trace with hash -1565307093, now seen corresponding path program 230 times [2022-02-11 00:30:30,036 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:30:30,036 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1525996989] [2022-02-11 00:30:30,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:30:30,036 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:30:30,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:30:30,163 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:30:30,163 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:30:30,163 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1525996989] [2022-02-11 00:30:30,163 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1525996989] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:30:30,163 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1825318579] [2022-02-11 00:30:30,163 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-11 00:30:30,163 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:30:30,163 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:30:30,164 INFO L229 MonitoredProcess]: Starting monitored process 231 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:30:30,165 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (231)] Waiting until timeout for monitored process [2022-02-11 00:30:30,226 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-11 00:30:30,226 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:30:30,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 32 conjunts are in the unsatisfiable core [2022-02-11 00:30:30,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:30:30,504 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 73 [2022-02-11 00:30:30,505 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 57 [2022-02-11 00:30:30,587 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:30:30,587 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:30:30,732 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:30:30,733 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 43 treesize of output 41 [2022-02-11 00:30:30,737 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:30:30,738 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 31 treesize of output 29 [2022-02-11 00:30:30,841 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:30:30,841 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1825318579] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:30:30,841 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:30:30,841 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 27 [2022-02-11 00:30:30,841 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1435023378] [2022-02-11 00:30:30,841 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:30:30,842 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-11 00:30:30,842 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:30:30,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-11 00:30:30,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=611, Unknown=0, NotChecked=0, Total=702 [2022-02-11 00:30:30,842 INFO L87 Difference]: Start difference. First operand 746 states and 2186 transitions. Second operand has 27 states, 27 states have (on average 1.4444444444444444) internal successors, (39), 27 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) [2022-02-11 00:30:31,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:30:31,942 INFO L93 Difference]: Finished difference Result 906 states and 2548 transitions. [2022-02-11 00:30:31,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-02-11 00:30:31,943 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.4444444444444444) internal successors, (39), 27 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 19 [2022-02-11 00:30:31,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:30:31,944 INFO L225 Difference]: With dead ends: 906 [2022-02-11 00:30:31,944 INFO L226 Difference]: Without dead ends: 904 [2022-02-11 00:30:31,945 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 527 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=350, Invalid=2100, Unknown=0, NotChecked=0, Total=2450 [2022-02-11 00:30:31,945 INFO L934 BasicCegarLoop]: 10 mSDtfsCounter, 175 mSDsluCounter, 299 mSDsCounter, 0 mSdLazyCounter, 726 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 175 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 788 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 726 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-11 00:30:31,945 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [175 Valid, 153 Invalid, 788 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 726 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-11 00:30:31,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 904 states. [2022-02-11 00:30:31,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 904 to 760. [2022-02-11 00:30:31,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 760 states, 759 states have (on average 2.934123847167325) internal successors, (2227), 759 states have internal predecessors, (2227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:30:31,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 760 states to 760 states and 2227 transitions. [2022-02-11 00:30:31,957 INFO L78 Accepts]: Start accepts. Automaton has 760 states and 2227 transitions. Word has length 19 [2022-02-11 00:30:31,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:30:31,957 INFO L470 AbstractCegarLoop]: Abstraction has 760 states and 2227 transitions. [2022-02-11 00:30:31,957 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.4444444444444444) internal successors, (39), 27 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) [2022-02-11 00:30:31,957 INFO L276 IsEmpty]: Start isEmpty. Operand 760 states and 2227 transitions. [2022-02-11 00:30:31,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-02-11 00:30:31,958 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:30:31,958 INFO L515 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:30:31,974 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (231)] Ended with exit code 0 [2022-02-11 00:30:32,158 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 231 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable238 [2022-02-11 00:30:32,159 INFO L402 AbstractCegarLoop]: === Iteration 240 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:30:32,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:30:32,159 INFO L85 PathProgramCache]: Analyzing trace with hash 565402871, now seen corresponding path program 231 times [2022-02-11 00:30:32,159 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:30:32,159 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1015810695] [2022-02-11 00:30:32,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:30:32,159 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:30:32,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:30:32,319 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:30:32,319 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:30:32,319 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1015810695] [2022-02-11 00:30:32,319 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1015810695] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:30:32,319 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [510933394] [2022-02-11 00:30:32,319 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-11 00:30:32,319 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:30:32,319 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:30:32,320 INFO L229 MonitoredProcess]: Starting monitored process 232 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:30:32,321 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (232)] Waiting until timeout for monitored process [2022-02-11 00:30:32,384 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-02-11 00:30:32,385 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:30:32,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-11 00:30:32,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:30:32,688 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:30:32,689 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:30:32,838 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:30:32,839 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 41 treesize of output 39 [2022-02-11 00:30:32,844 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:30:32,844 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 29 treesize of output 27 [2022-02-11 00:30:32,954 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:30:32,955 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [510933394] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:30:32,955 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:30:32,955 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-02-11 00:30:32,955 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [51109502] [2022-02-11 00:30:32,955 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:30:32,955 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-11 00:30:32,955 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:30:32,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-11 00:30:32,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=563, Unknown=0, NotChecked=0, Total=650 [2022-02-11 00:30:32,955 INFO L87 Difference]: Start difference. First operand 760 states and 2227 transitions. Second operand has 26 states, 26 states have (on average 1.3846153846153846) internal successors, (36), 26 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) [2022-02-11 00:30:33,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:30:33,724 INFO L93 Difference]: Finished difference Result 853 states and 2424 transitions. [2022-02-11 00:30:33,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-02-11 00:30:33,725 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.3846153846153846) internal successors, (36), 26 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 19 [2022-02-11 00:30:33,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:30:33,726 INFO L225 Difference]: With dead ends: 853 [2022-02-11 00:30:33,726 INFO L226 Difference]: Without dead ends: 853 [2022-02-11 00:30:33,726 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 375 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=255, Invalid=1637, Unknown=0, NotChecked=0, Total=1892 [2022-02-11 00:30:33,726 INFO L934 BasicCegarLoop]: 8 mSDtfsCounter, 160 mSDsluCounter, 230 mSDsCounter, 0 mSdLazyCounter, 574 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 627 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 574 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-11 00:30:33,726 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [160 Valid, 111 Invalid, 627 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 574 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-11 00:30:33,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 853 states. [2022-02-11 00:30:33,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 853 to 757. [2022-02-11 00:30:33,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 757 states, 756 states have (on average 2.933862433862434) internal successors, (2218), 756 states have internal predecessors, (2218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:30:33,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 757 states to 757 states and 2218 transitions. [2022-02-11 00:30:33,734 INFO L78 Accepts]: Start accepts. Automaton has 757 states and 2218 transitions. Word has length 19 [2022-02-11 00:30:33,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:30:33,734 INFO L470 AbstractCegarLoop]: Abstraction has 757 states and 2218 transitions. [2022-02-11 00:30:33,734 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.3846153846153846) internal successors, (36), 26 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) [2022-02-11 00:30:33,735 INFO L276 IsEmpty]: Start isEmpty. Operand 757 states and 2218 transitions. [2022-02-11 00:30:33,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-02-11 00:30:33,735 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:30:33,735 INFO L515 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:30:33,752 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (232)] Ended with exit code 0 [2022-02-11 00:30:33,936 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 232 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable239 [2022-02-11 00:30:33,936 INFO L402 AbstractCegarLoop]: === Iteration 241 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:30:33,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:30:33,936 INFO L85 PathProgramCache]: Analyzing trace with hash -1622780305, now seen corresponding path program 232 times [2022-02-11 00:30:33,936 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:30:33,936 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1416037513] [2022-02-11 00:30:33,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:30:33,936 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:30:33,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:30:34,063 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:30:34,064 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:30:34,064 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1416037513] [2022-02-11 00:30:34,064 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1416037513] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:30:34,064 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [387041401] [2022-02-11 00:30:34,064 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-11 00:30:34,064 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:30:34,064 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:30:34,065 INFO L229 MonitoredProcess]: Starting monitored process 233 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:30:34,065 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (233)] Waiting until timeout for monitored process [2022-02-11 00:30:34,125 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-11 00:30:34,125 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:30:34,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-11 00:30:34,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:30:34,410 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:30:34,410 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:30:34,584 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:30:34,585 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 42 treesize of output 40 [2022-02-11 00:30:34,589 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:30:34,590 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 30 treesize of output 28 [2022-02-11 00:30:34,697 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:30:34,697 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [387041401] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:30:34,697 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:30:34,697 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-02-11 00:30:34,697 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [724401133] [2022-02-11 00:30:34,697 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:30:34,697 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-11 00:30:34,698 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:30:34,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-11 00:30:34,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=560, Unknown=0, NotChecked=0, Total=650 [2022-02-11 00:30:34,698 INFO L87 Difference]: Start difference. First operand 757 states and 2218 transitions. Second operand has 26 states, 26 states have (on average 1.3846153846153846) internal successors, (36), 26 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) [2022-02-11 00:30:35,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:30:35,200 INFO L93 Difference]: Finished difference Result 825 states and 2351 transitions. [2022-02-11 00:30:35,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-02-11 00:30:35,200 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.3846153846153846) internal successors, (36), 26 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 19 [2022-02-11 00:30:35,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:30:35,201 INFO L225 Difference]: With dead ends: 825 [2022-02-11 00:30:35,201 INFO L226 Difference]: Without dead ends: 825 [2022-02-11 00:30:35,201 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 217 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=154, Invalid=1036, Unknown=0, NotChecked=0, Total=1190 [2022-02-11 00:30:35,201 INFO L934 BasicCegarLoop]: 9 mSDtfsCounter, 83 mSDsluCounter, 299 mSDsCounter, 0 mSdLazyCounter, 658 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 675 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 658 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-11 00:30:35,201 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [83 Valid, 130 Invalid, 675 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 658 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-11 00:30:35,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 825 states. [2022-02-11 00:30:35,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 825 to 755. [2022-02-11 00:30:35,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 755 states, 754 states have (on average 2.9323607427055705) internal successors, (2211), 754 states have internal predecessors, (2211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:30:35,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 755 states to 755 states and 2211 transitions. [2022-02-11 00:30:35,209 INFO L78 Accepts]: Start accepts. Automaton has 755 states and 2211 transitions. Word has length 19 [2022-02-11 00:30:35,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:30:35,210 INFO L470 AbstractCegarLoop]: Abstraction has 755 states and 2211 transitions. [2022-02-11 00:30:35,210 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.3846153846153846) internal successors, (36), 26 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) [2022-02-11 00:30:35,210 INFO L276 IsEmpty]: Start isEmpty. Operand 755 states and 2211 transitions. [2022-02-11 00:30:35,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-02-11 00:30:35,210 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:30:35,210 INFO L515 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:30:35,227 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (233)] Ended with exit code 0 [2022-02-11 00:30:35,411 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable240,233 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:30:35,411 INFO L402 AbstractCegarLoop]: === Iteration 242 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:30:35,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:30:35,411 INFO L85 PathProgramCache]: Analyzing trace with hash -1357777353, now seen corresponding path program 233 times [2022-02-11 00:30:35,411 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:30:35,411 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [94852749] [2022-02-11 00:30:35,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:30:35,411 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:30:35,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:30:35,526 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:30:35,527 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:30:35,527 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [94852749] [2022-02-11 00:30:35,527 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [94852749] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:30:35,527 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2018198175] [2022-02-11 00:30:35,527 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-11 00:30:35,527 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:30:35,527 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:30:35,528 INFO L229 MonitoredProcess]: Starting monitored process 234 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:30:35,528 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (234)] Waiting until timeout for monitored process [2022-02-11 00:30:35,594 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-11 00:30:35,594 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:30:35,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-11 00:30:35,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:30:35,873 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:30:35,873 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:30:36,054 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:30:36,054 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 42 treesize of output 40 [2022-02-11 00:30:36,059 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:30:36,060 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 30 treesize of output 28 [2022-02-11 00:30:36,162 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:30:36,162 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2018198175] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:30:36,162 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:30:36,162 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 27 [2022-02-11 00:30:36,162 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [668626045] [2022-02-11 00:30:36,162 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:30:36,162 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-11 00:30:36,162 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:30:36,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-11 00:30:36,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=626, Unknown=0, NotChecked=0, Total=702 [2022-02-11 00:30:36,162 INFO L87 Difference]: Start difference. First operand 755 states and 2211 transitions. Second operand has 27 states, 27 states have (on average 1.4444444444444444) internal successors, (39), 27 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) [2022-02-11 00:30:36,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:30:36,595 INFO L93 Difference]: Finished difference Result 833 states and 2375 transitions. [2022-02-11 00:30:36,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-02-11 00:30:36,595 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.4444444444444444) internal successors, (39), 27 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 19 [2022-02-11 00:30:36,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:30:36,596 INFO L225 Difference]: With dead ends: 833 [2022-02-11 00:30:36,596 INFO L226 Difference]: Without dead ends: 833 [2022-02-11 00:30:36,597 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=126, Invalid=930, Unknown=0, NotChecked=0, Total=1056 [2022-02-11 00:30:36,597 INFO L934 BasicCegarLoop]: 12 mSDtfsCounter, 81 mSDsluCounter, 381 mSDsCounter, 0 mSdLazyCounter, 671 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 225 SdHoareTripleChecker+Invalid, 692 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 671 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-11 00:30:36,597 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 225 Invalid, 692 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 671 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-11 00:30:36,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 833 states. [2022-02-11 00:30:36,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 833 to 762. [2022-02-11 00:30:36,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 762 states, 761 states have (on average 2.9369250985545334) internal successors, (2235), 761 states have internal predecessors, (2235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:30:36,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 762 states to 762 states and 2235 transitions. [2022-02-11 00:30:36,609 INFO L78 Accepts]: Start accepts. Automaton has 762 states and 2235 transitions. Word has length 19 [2022-02-11 00:30:36,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:30:36,609 INFO L470 AbstractCegarLoop]: Abstraction has 762 states and 2235 transitions. [2022-02-11 00:30:36,609 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.4444444444444444) internal successors, (39), 27 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) [2022-02-11 00:30:36,609 INFO L276 IsEmpty]: Start isEmpty. Operand 762 states and 2235 transitions. [2022-02-11 00:30:36,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-02-11 00:30:36,610 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:30:36,610 INFO L515 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:30:36,626 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (234)] Ended with exit code 0 [2022-02-11 00:30:36,810 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable241,234 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:30:36,811 INFO L402 AbstractCegarLoop]: === Iteration 243 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:30:36,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:30:36,811 INFO L85 PathProgramCache]: Analyzing trace with hash -471979073, now seen corresponding path program 234 times [2022-02-11 00:30:36,811 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:30:36,811 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1617952331] [2022-02-11 00:30:36,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:30:36,812 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:30:36,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:30:36,937 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:30:36,937 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:30:36,937 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1617952331] [2022-02-11 00:30:36,937 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1617952331] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:30:36,937 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1240112780] [2022-02-11 00:30:36,937 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-11 00:30:36,938 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:30:36,938 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:30:36,941 INFO L229 MonitoredProcess]: Starting monitored process 235 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:30:36,942 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (235)] Waiting until timeout for monitored process [2022-02-11 00:30:37,002 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-11 00:30:37,003 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:30:37,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-11 00:30:37,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:30:37,298 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:30:37,299 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:30:37,484 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:30:37,484 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 41 treesize of output 39 [2022-02-11 00:30:37,489 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:30:37,489 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 29 treesize of output 27 [2022-02-11 00:30:37,591 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:30:37,592 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1240112780] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:30:37,592 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:30:37,592 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 27 [2022-02-11 00:30:37,592 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [572935544] [2022-02-11 00:30:37,592 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:30:37,592 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-11 00:30:37,592 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:30:37,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-11 00:30:37,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=625, Unknown=0, NotChecked=0, Total=702 [2022-02-11 00:30:37,592 INFO L87 Difference]: Start difference. First operand 762 states and 2235 transitions. Second operand has 27 states, 27 states have (on average 1.4444444444444444) internal successors, (39), 27 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) [2022-02-11 00:30:38,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:30:38,276 INFO L93 Difference]: Finished difference Result 857 states and 2435 transitions. [2022-02-11 00:30:38,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-02-11 00:30:38,276 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.4444444444444444) internal successors, (39), 27 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 19 [2022-02-11 00:30:38,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:30:38,277 INFO L225 Difference]: With dead ends: 857 [2022-02-11 00:30:38,277 INFO L226 Difference]: Without dead ends: 857 [2022-02-11 00:30:38,277 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 283 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=212, Invalid=1594, Unknown=0, NotChecked=0, Total=1806 [2022-02-11 00:30:38,277 INFO L934 BasicCegarLoop]: 9 mSDtfsCounter, 56 mSDsluCounter, 245 mSDsCounter, 0 mSdLazyCounter, 506 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 533 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 506 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-11 00:30:38,278 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 151 Invalid, 533 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 506 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-11 00:30:38,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 857 states. [2022-02-11 00:30:38,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 857 to 757. [2022-02-11 00:30:38,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 757 states, 756 states have (on average 2.9325396825396823) internal successors, (2217), 756 states have internal predecessors, (2217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:30:38,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 757 states to 757 states and 2217 transitions. [2022-02-11 00:30:38,286 INFO L78 Accepts]: Start accepts. Automaton has 757 states and 2217 transitions. Word has length 19 [2022-02-11 00:30:38,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:30:38,286 INFO L470 AbstractCegarLoop]: Abstraction has 757 states and 2217 transitions. [2022-02-11 00:30:38,286 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.4444444444444444) internal successors, (39), 27 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) [2022-02-11 00:30:38,286 INFO L276 IsEmpty]: Start isEmpty. Operand 757 states and 2217 transitions. [2022-02-11 00:30:38,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-02-11 00:30:38,287 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:30:38,287 INFO L515 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:30:38,303 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (235)] Ended with exit code 0 [2022-02-11 00:30:38,487 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable242,235 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:30:38,487 INFO L402 AbstractCegarLoop]: === Iteration 244 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:30:38,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:30:38,488 INFO L85 PathProgramCache]: Analyzing trace with hash 1634805047, now seen corresponding path program 235 times [2022-02-11 00:30:38,488 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:30:38,488 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1231784143] [2022-02-11 00:30:38,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:30:38,488 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:30:38,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:30:38,610 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:30:38,610 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:30:38,610 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1231784143] [2022-02-11 00:30:38,610 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1231784143] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:30:38,610 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1403225212] [2022-02-11 00:30:38,610 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-11 00:30:38,611 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:30:38,611 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:30:38,612 INFO L229 MonitoredProcess]: Starting monitored process 236 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:30:38,612 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (236)] Waiting until timeout for monitored process [2022-02-11 00:30:38,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:30:38,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-11 00:30:38,674 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:30:39,001 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:30:39,001 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:30:39,186 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:30:39,187 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 41 treesize of output 39 [2022-02-11 00:30:39,192 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:30:39,192 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 29 treesize of output 27 [2022-02-11 00:30:39,290 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:30:39,290 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1403225212] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:30:39,290 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:30:39,290 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 27 [2022-02-11 00:30:39,290 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1471372267] [2022-02-11 00:30:39,291 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:30:39,291 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-11 00:30:39,291 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:30:39,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-11 00:30:39,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=625, Unknown=0, NotChecked=0, Total=702 [2022-02-11 00:30:39,291 INFO L87 Difference]: Start difference. First operand 757 states and 2217 transitions. Second operand has 27 states, 27 states have (on average 1.4444444444444444) internal successors, (39), 27 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) [2022-02-11 00:30:40,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:30:40,282 INFO L93 Difference]: Finished difference Result 869 states and 2450 transitions. [2022-02-11 00:30:40,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-02-11 00:30:40,282 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.4444444444444444) internal successors, (39), 27 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 19 [2022-02-11 00:30:40,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:30:40,283 INFO L225 Difference]: With dead ends: 869 [2022-02-11 00:30:40,283 INFO L226 Difference]: Without dead ends: 869 [2022-02-11 00:30:40,284 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 341 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=295, Invalid=1867, Unknown=0, NotChecked=0, Total=2162 [2022-02-11 00:30:40,284 INFO L934 BasicCegarLoop]: 10 mSDtfsCounter, 48 mSDsluCounter, 248 mSDsCounter, 0 mSdLazyCounter, 609 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 650 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 609 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-11 00:30:40,284 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 165 Invalid, 650 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 609 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-11 00:30:40,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 869 states. [2022-02-11 00:30:40,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 869 to 758. [2022-02-11 00:30:40,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 758 states, 757 states have (on average 2.9326287978863936) internal successors, (2220), 757 states have internal predecessors, (2220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:30:40,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 758 states to 758 states and 2220 transitions. [2022-02-11 00:30:40,292 INFO L78 Accepts]: Start accepts. Automaton has 758 states and 2220 transitions. Word has length 19 [2022-02-11 00:30:40,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:30:40,292 INFO L470 AbstractCegarLoop]: Abstraction has 758 states and 2220 transitions. [2022-02-11 00:30:40,292 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.4444444444444444) internal successors, (39), 27 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) [2022-02-11 00:30:40,292 INFO L276 IsEmpty]: Start isEmpty. Operand 758 states and 2220 transitions. [2022-02-11 00:30:40,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-02-11 00:30:40,293 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:30:40,293 INFO L515 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:30:40,309 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (236)] Ended with exit code 0 [2022-02-11 00:30:40,493 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 236 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable243 [2022-02-11 00:30:40,494 INFO L402 AbstractCegarLoop]: === Iteration 245 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:30:40,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:30:40,494 INFO L85 PathProgramCache]: Analyzing trace with hash -513991489, now seen corresponding path program 236 times [2022-02-11 00:30:40,494 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:30:40,494 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1027997971] [2022-02-11 00:30:40,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:30:40,494 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:30:40,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:30:40,619 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:30:40,619 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:30:40,619 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1027997971] [2022-02-11 00:30:40,619 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1027997971] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:30:40,619 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2099067097] [2022-02-11 00:30:40,619 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-11 00:30:40,619 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:30:40,620 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:30:40,620 INFO L229 MonitoredProcess]: Starting monitored process 237 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:30:40,621 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (237)] Waiting until timeout for monitored process [2022-02-11 00:30:40,684 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-11 00:30:40,684 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:30:40,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-11 00:30:40,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:30:40,978 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 73 [2022-02-11 00:30:40,980 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 57 [2022-02-11 00:30:41,056 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:30:41,056 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:30:41,240 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:30:41,240 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 41 treesize of output 39 [2022-02-11 00:30:41,245 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:30:41,245 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 29 treesize of output 27 [2022-02-11 00:30:41,337 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:30:41,337 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2099067097] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:30:41,337 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:30:41,337 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 27 [2022-02-11 00:30:41,337 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [464205053] [2022-02-11 00:30:41,337 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:30:41,338 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-11 00:30:41,338 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:30:41,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-11 00:30:41,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=627, Unknown=0, NotChecked=0, Total=702 [2022-02-11 00:30:41,338 INFO L87 Difference]: Start difference. First operand 758 states and 2220 transitions. Second operand has 27 states, 27 states have (on average 1.4444444444444444) internal successors, (39), 27 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) [2022-02-11 00:30:42,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:30:42,414 INFO L93 Difference]: Finished difference Result 865 states and 2420 transitions. [2022-02-11 00:30:42,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-02-11 00:30:42,415 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.4444444444444444) internal successors, (39), 27 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 19 [2022-02-11 00:30:42,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:30:42,416 INFO L225 Difference]: With dead ends: 865 [2022-02-11 00:30:42,416 INFO L226 Difference]: Without dead ends: 862 [2022-02-11 00:30:42,416 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 368 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=379, Invalid=1973, Unknown=0, NotChecked=0, Total=2352 [2022-02-11 00:30:42,416 INFO L934 BasicCegarLoop]: 10 mSDtfsCounter, 105 mSDsluCounter, 280 mSDsCounter, 0 mSdLazyCounter, 549 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 174 SdHoareTripleChecker+Invalid, 606 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 549 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-11 00:30:42,416 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [105 Valid, 174 Invalid, 606 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 549 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-11 00:30:42,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 862 states. [2022-02-11 00:30:42,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 862 to 751. [2022-02-11 00:30:42,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 751 states, 750 states have (on average 2.933333333333333) internal successors, (2200), 750 states have internal predecessors, (2200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:30:42,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 751 states to 751 states and 2200 transitions. [2022-02-11 00:30:42,424 INFO L78 Accepts]: Start accepts. Automaton has 751 states and 2200 transitions. Word has length 19 [2022-02-11 00:30:42,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:30:42,424 INFO L470 AbstractCegarLoop]: Abstraction has 751 states and 2200 transitions. [2022-02-11 00:30:42,424 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.4444444444444444) internal successors, (39), 27 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) [2022-02-11 00:30:42,424 INFO L276 IsEmpty]: Start isEmpty. Operand 751 states and 2200 transitions. [2022-02-11 00:30:42,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-02-11 00:30:42,425 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:30:42,425 INFO L515 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:30:42,443 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (237)] Ended with exit code 0 [2022-02-11 00:30:42,625 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 237 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable244 [2022-02-11 00:30:42,626 INFO L402 AbstractCegarLoop]: === Iteration 246 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:30:42,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:30:42,626 INFO L85 PathProgramCache]: Analyzing trace with hash -1874108229, now seen corresponding path program 237 times [2022-02-11 00:30:42,626 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:30:42,626 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [158051940] [2022-02-11 00:30:42,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:30:42,626 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:30:42,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:30:42,747 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:30:42,747 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:30:42,747 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [158051940] [2022-02-11 00:30:42,747 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [158051940] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:30:42,747 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1609251213] [2022-02-11 00:30:42,747 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-11 00:30:42,748 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:30:42,748 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:30:42,748 INFO L229 MonitoredProcess]: Starting monitored process 238 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:30:42,749 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (238)] Waiting until timeout for monitored process [2022-02-11 00:30:42,812 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-02-11 00:30:42,812 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:30:42,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-11 00:30:42,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:30:43,131 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 98 treesize of output 82 [2022-02-11 00:30:43,133 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 82 treesize of output 66 [2022-02-11 00:30:43,205 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:30:43,205 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:30:43,365 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:30:43,365 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 73 treesize of output 67 [2022-02-11 00:30:43,371 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:30:43,371 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 57 treesize of output 51 [2022-02-11 00:30:43,518 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:30:43,519 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1609251213] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:30:43,519 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:30:43,519 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 27 [2022-02-11 00:30:43,519 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [995481885] [2022-02-11 00:30:43,519 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:30:43,519 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-11 00:30:43,519 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:30:43,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-11 00:30:43,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=606, Unknown=0, NotChecked=0, Total=702 [2022-02-11 00:30:43,519 INFO L87 Difference]: Start difference. First operand 751 states and 2200 transitions. Second operand has 27 states, 27 states have (on average 1.3703703703703705) internal successors, (37), 27 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) [2022-02-11 00:30:43,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:30:43,996 INFO L93 Difference]: Finished difference Result 827 states and 2322 transitions. [2022-02-11 00:30:43,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-02-11 00:30:43,997 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.3703703703703705) internal successors, (37), 27 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 19 [2022-02-11 00:30:43,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:30:43,998 INFO L225 Difference]: With dead ends: 827 [2022-02-11 00:30:43,998 INFO L226 Difference]: Without dead ends: 827 [2022-02-11 00:30:43,998 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=159, Invalid=1031, Unknown=0, NotChecked=0, Total=1190 [2022-02-11 00:30:43,998 INFO L934 BasicCegarLoop]: 23 mSDtfsCounter, 114 mSDsluCounter, 385 mSDsCounter, 0 mSdLazyCounter, 525 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 286 SdHoareTripleChecker+Invalid, 565 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 525 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-11 00:30:43,998 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 286 Invalid, 565 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 525 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-11 00:30:43,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 827 states. [2022-02-11 00:30:44,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 827 to 747. [2022-02-11 00:30:44,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 747 states, 746 states have (on average 2.9383378016085793) internal successors, (2192), 746 states have internal predecessors, (2192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:30:44,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 747 states to 747 states and 2192 transitions. [2022-02-11 00:30:44,006 INFO L78 Accepts]: Start accepts. Automaton has 747 states and 2192 transitions. Word has length 19 [2022-02-11 00:30:44,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:30:44,006 INFO L470 AbstractCegarLoop]: Abstraction has 747 states and 2192 transitions. [2022-02-11 00:30:44,006 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.3703703703703705) internal successors, (37), 27 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) [2022-02-11 00:30:44,006 INFO L276 IsEmpty]: Start isEmpty. Operand 747 states and 2192 transitions. [2022-02-11 00:30:44,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-02-11 00:30:44,007 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:30:44,007 INFO L515 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:30:44,023 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (238)] Ended with exit code 0 [2022-02-11 00:30:44,212 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 238 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable245 [2022-02-11 00:30:44,212 INFO L402 AbstractCegarLoop]: === Iteration 247 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:30:44,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:30:44,213 INFO L85 PathProgramCache]: Analyzing trace with hash 675081335, now seen corresponding path program 238 times [2022-02-11 00:30:44,213 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:30:44,213 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [754993657] [2022-02-11 00:30:44,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:30:44,213 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:30:44,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:30:44,379 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:30:44,380 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:30:44,380 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [754993657] [2022-02-11 00:30:44,380 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [754993657] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:30:44,380 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1423115060] [2022-02-11 00:30:44,380 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-11 00:30:44,380 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:30:44,380 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:30:44,381 INFO L229 MonitoredProcess]: Starting monitored process 239 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:30:44,381 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (239)] Waiting until timeout for monitored process [2022-02-11 00:30:44,441 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-11 00:30:44,441 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:30:44,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 33 conjunts are in the unsatisfiable core [2022-02-11 00:30:44,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:30:44,771 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:30:44,772 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:30:44,970 INFO L353 Elim1Store]: treesize reduction 10, result has 65.5 percent of original size [2022-02-11 00:30:44,970 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 55 treesize of output 57 [2022-02-11 00:30:44,974 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:30:44,980 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:30:44,980 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 39 treesize of output 41 [2022-02-11 00:30:45,140 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:30:45,140 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1423115060] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:30:45,140 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:30:45,140 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 27 [2022-02-11 00:30:45,140 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1712268165] [2022-02-11 00:30:45,141 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:30:45,141 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-11 00:30:45,141 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:30:45,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-11 00:30:45,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=595, Unknown=0, NotChecked=0, Total=702 [2022-02-11 00:30:45,141 INFO L87 Difference]: Start difference. First operand 747 states and 2192 transitions. Second operand has 27 states, 27 states have (on average 1.4074074074074074) internal successors, (38), 27 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) [2022-02-11 00:30:45,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:30:45,643 INFO L93 Difference]: Finished difference Result 848 states and 2411 transitions. [2022-02-11 00:30:45,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-02-11 00:30:45,643 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.4074074074074074) internal successors, (38), 27 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 19 [2022-02-11 00:30:45,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:30:45,644 INFO L225 Difference]: With dead ends: 848 [2022-02-11 00:30:45,644 INFO L226 Difference]: Without dead ends: 848 [2022-02-11 00:30:45,644 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 306 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=185, Invalid=1075, Unknown=0, NotChecked=0, Total=1260 [2022-02-11 00:30:45,645 INFO L934 BasicCegarLoop]: 7 mSDtfsCounter, 67 mSDsluCounter, 191 mSDsCounter, 0 mSdLazyCounter, 455 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 487 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 455 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-11 00:30:45,645 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 92 Invalid, 487 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 455 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-11 00:30:45,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 848 states. [2022-02-11 00:30:45,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 848 to 751. [2022-02-11 00:30:45,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 751 states, 750 states have (on average 2.937333333333333) internal successors, (2203), 750 states have internal predecessors, (2203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:30:45,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 751 states to 751 states and 2203 transitions. [2022-02-11 00:30:45,653 INFO L78 Accepts]: Start accepts. Automaton has 751 states and 2203 transitions. Word has length 19 [2022-02-11 00:30:45,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:30:45,653 INFO L470 AbstractCegarLoop]: Abstraction has 751 states and 2203 transitions. [2022-02-11 00:30:45,653 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.4074074074074074) internal successors, (38), 27 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) [2022-02-11 00:30:45,653 INFO L276 IsEmpty]: Start isEmpty. Operand 751 states and 2203 transitions. [2022-02-11 00:30:45,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-02-11 00:30:45,654 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:30:45,654 INFO L515 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:30:45,670 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (239)] Forceful destruction successful, exit code 0 [2022-02-11 00:30:45,854 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 239 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable246 [2022-02-11 00:30:45,854 INFO L402 AbstractCegarLoop]: === Iteration 248 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:30:45,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:30:45,854 INFO L85 PathProgramCache]: Analyzing trace with hash -1690888137, now seen corresponding path program 239 times [2022-02-11 00:30:45,854 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:30:45,855 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1697717810] [2022-02-11 00:30:45,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:30:45,855 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:30:45,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:30:45,985 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:30:45,985 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:30:45,985 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1697717810] [2022-02-11 00:30:45,985 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1697717810] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:30:45,985 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [450865968] [2022-02-11 00:30:45,985 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-11 00:30:45,985 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:30:45,985 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:30:45,986 INFO L229 MonitoredProcess]: Starting monitored process 240 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:30:45,986 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (240)] Waiting until timeout for monitored process [2022-02-11 00:30:46,057 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-02-11 00:30:46,057 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:30:46,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-11 00:30:46,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:30:46,383 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:30:46,383 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:30:46,561 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:30:46,561 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 42 treesize of output 40 [2022-02-11 00:30:46,566 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:30:46,566 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 30 treesize of output 28 [2022-02-11 00:30:46,679 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:30:46,679 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [450865968] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:30:46,680 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:30:46,680 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-02-11 00:30:46,680 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006099200] [2022-02-11 00:30:46,680 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:30:46,680 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-11 00:30:46,680 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:30:46,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-11 00:30:46,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=568, Unknown=0, NotChecked=0, Total=650 [2022-02-11 00:30:46,680 INFO L87 Difference]: Start difference. First operand 751 states and 2203 transitions. Second operand has 26 states, 26 states have (on average 1.4615384615384615) internal successors, (38), 26 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) [2022-02-11 00:30:46,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:30:46,997 INFO L93 Difference]: Finished difference Result 810 states and 2328 transitions. [2022-02-11 00:30:46,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-02-11 00:30:46,997 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.4615384615384615) internal successors, (38), 26 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 19 [2022-02-11 00:30:46,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:30:46,998 INFO L225 Difference]: With dead ends: 810 [2022-02-11 00:30:46,999 INFO L226 Difference]: Without dead ends: 810 [2022-02-11 00:30:46,999 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=87, Invalid=615, Unknown=0, NotChecked=0, Total=702 [2022-02-11 00:30:46,999 INFO L934 BasicCegarLoop]: 10 mSDtfsCounter, 28 mSDsluCounter, 240 mSDsCounter, 0 mSdLazyCounter, 623 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 631 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 623 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-11 00:30:46,999 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 151 Invalid, 631 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 623 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-11 00:30:46,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 810 states. [2022-02-11 00:30:47,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 810 to 751. [2022-02-11 00:30:47,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 751 states, 750 states have (on average 2.937333333333333) internal successors, (2203), 750 states have internal predecessors, (2203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:30:47,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 751 states to 751 states and 2203 transitions. [2022-02-11 00:30:47,007 INFO L78 Accepts]: Start accepts. Automaton has 751 states and 2203 transitions. Word has length 19 [2022-02-11 00:30:47,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:30:47,007 INFO L470 AbstractCegarLoop]: Abstraction has 751 states and 2203 transitions. [2022-02-11 00:30:47,007 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.4615384615384615) internal successors, (38), 26 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) [2022-02-11 00:30:47,007 INFO L276 IsEmpty]: Start isEmpty. Operand 751 states and 2203 transitions. [2022-02-11 00:30:47,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-02-11 00:30:47,008 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:30:47,008 INFO L515 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:30:47,027 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (240)] Forceful destruction successful, exit code 0 [2022-02-11 00:30:47,208 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable247,240 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:30:47,209 INFO L402 AbstractCegarLoop]: === Iteration 249 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:30:47,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:30:47,209 INFO L85 PathProgramCache]: Analyzing trace with hash 415895983, now seen corresponding path program 240 times [2022-02-11 00:30:47,209 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:30:47,209 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [285551476] [2022-02-11 00:30:47,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:30:47,209 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:30:47,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:30:47,351 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:30:47,351 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:30:47,352 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [285551476] [2022-02-11 00:30:47,352 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [285551476] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:30:47,352 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [768000448] [2022-02-11 00:30:47,352 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-11 00:30:47,352 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:30:47,352 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:30:47,353 INFO L229 MonitoredProcess]: Starting monitored process 241 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:30:47,353 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (241)] Waiting until timeout for monitored process [2022-02-11 00:30:47,423 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-02-11 00:30:47,423 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:30:47,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-11 00:30:47,424 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:30:47,760 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:30:47,760 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:30:47,949 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:30:47,949 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 42 treesize of output 40 [2022-02-11 00:30:47,954 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:30:47,954 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 30 treesize of output 28 [2022-02-11 00:30:48,064 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:30:48,064 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [768000448] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:30:48,064 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:30:48,064 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-02-11 00:30:48,064 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422868852] [2022-02-11 00:30:48,064 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:30:48,064 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-11 00:30:48,064 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:30:48,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-11 00:30:48,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=568, Unknown=0, NotChecked=0, Total=650 [2022-02-11 00:30:48,065 INFO L87 Difference]: Start difference. First operand 751 states and 2203 transitions. Second operand has 26 states, 26 states have (on average 1.4615384615384615) internal successors, (38), 26 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) [2022-02-11 00:30:48,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:30:48,625 INFO L93 Difference]: Finished difference Result 828 states and 2366 transitions. [2022-02-11 00:30:48,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-02-11 00:30:48,625 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.4615384615384615) internal successors, (38), 26 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 19 [2022-02-11 00:30:48,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:30:48,626 INFO L225 Difference]: With dead ends: 828 [2022-02-11 00:30:48,627 INFO L226 Difference]: Without dead ends: 828 [2022-02-11 00:30:48,627 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 270 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=182, Invalid=1224, Unknown=0, NotChecked=0, Total=1406 [2022-02-11 00:30:48,627 INFO L934 BasicCegarLoop]: 9 mSDtfsCounter, 31 mSDsluCounter, 188 mSDsCounter, 0 mSdLazyCounter, 512 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 539 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 512 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-11 00:30:48,627 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 120 Invalid, 539 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 512 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-11 00:30:48,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 828 states. [2022-02-11 00:30:48,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 828 to 752. [2022-02-11 00:30:48,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 752 states, 751 states have (on average 2.937416777629827) internal successors, (2206), 751 states have internal predecessors, (2206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:30:48,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 752 states to 752 states and 2206 transitions. [2022-02-11 00:30:48,635 INFO L78 Accepts]: Start accepts. Automaton has 752 states and 2206 transitions. Word has length 19 [2022-02-11 00:30:48,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:30:48,635 INFO L470 AbstractCegarLoop]: Abstraction has 752 states and 2206 transitions. [2022-02-11 00:30:48,635 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.4615384615384615) internal successors, (38), 26 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) [2022-02-11 00:30:48,635 INFO L276 IsEmpty]: Start isEmpty. Operand 752 states and 2206 transitions. [2022-02-11 00:30:48,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-02-11 00:30:48,636 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:30:48,636 INFO L515 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:30:48,652 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (241)] Ended with exit code 0 [2022-02-11 00:30:48,836 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 241 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable248 [2022-02-11 00:30:48,837 INFO L402 AbstractCegarLoop]: === Iteration 250 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:30:48,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:30:48,837 INFO L85 PathProgramCache]: Analyzing trace with hash 1217410799, now seen corresponding path program 241 times [2022-02-11 00:30:48,837 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:30:48,837 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [807296772] [2022-02-11 00:30:48,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:30:48,837 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:30:48,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:30:48,983 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:30:48,983 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:30:48,983 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [807296772] [2022-02-11 00:30:48,983 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [807296772] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:30:48,983 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [48041987] [2022-02-11 00:30:48,984 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-11 00:30:48,984 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:30:48,984 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:30:48,985 INFO L229 MonitoredProcess]: Starting monitored process 242 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:30:48,985 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (242)] Waiting until timeout for monitored process [2022-02-11 00:30:49,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:30:49,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 33 conjunts are in the unsatisfiable core [2022-02-11 00:30:49,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:30:49,500 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 112 treesize of output 92 [2022-02-11 00:30:49,502 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 80 treesize of output 64 [2022-02-11 00:30:49,582 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:30:49,582 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:30:49,880 INFO L353 Elim1Store]: treesize reduction 14, result has 57.6 percent of original size [2022-02-11 00:30:49,881 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 64 treesize of output 62 [2022-02-11 00:30:49,884 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:30:49,892 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:30:49,892 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 44 treesize of output 46 [2022-02-11 00:30:50,018 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:30:50,019 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [48041987] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:30:50,019 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:30:50,019 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 27 [2022-02-11 00:30:50,019 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1210299140] [2022-02-11 00:30:50,019 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:30:50,019 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-11 00:30:50,019 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:30:50,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-11 00:30:50,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=600, Unknown=0, NotChecked=0, Total=702 [2022-02-11 00:30:50,020 INFO L87 Difference]: Start difference. First operand 752 states and 2206 transitions. Second operand has 27 states, 27 states have (on average 1.4074074074074074) internal successors, (38), 27 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) [2022-02-11 00:30:50,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:30:50,980 INFO L93 Difference]: Finished difference Result 856 states and 2388 transitions. [2022-02-11 00:30:50,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-02-11 00:30:50,981 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.4074074074074074) internal successors, (38), 27 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 19 [2022-02-11 00:30:50,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:30:50,982 INFO L225 Difference]: With dead ends: 856 [2022-02-11 00:30:50,982 INFO L226 Difference]: Without dead ends: 854 [2022-02-11 00:30:50,982 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 278 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=205, Invalid=1201, Unknown=0, NotChecked=0, Total=1406 [2022-02-11 00:30:50,982 INFO L934 BasicCegarLoop]: 18 mSDtfsCounter, 69 mSDsluCounter, 471 mSDsCounter, 0 mSdLazyCounter, 838 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 309 SdHoareTripleChecker+Invalid, 877 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 838 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-11 00:30:50,982 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 309 Invalid, 877 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 838 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-11 00:30:50,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 854 states. [2022-02-11 00:30:50,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 854 to 751. [2022-02-11 00:30:50,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 751 states, 750 states have (on average 2.9386666666666668) internal successors, (2204), 750 states have internal predecessors, (2204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:30:50,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 751 states to 751 states and 2204 transitions. [2022-02-11 00:30:50,991 INFO L78 Accepts]: Start accepts. Automaton has 751 states and 2204 transitions. Word has length 19 [2022-02-11 00:30:50,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:30:50,991 INFO L470 AbstractCegarLoop]: Abstraction has 751 states and 2204 transitions. [2022-02-11 00:30:50,991 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.4074074074074074) internal successors, (38), 27 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) [2022-02-11 00:30:50,991 INFO L276 IsEmpty]: Start isEmpty. Operand 751 states and 2204 transitions. [2022-02-11 00:30:50,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-02-11 00:30:50,992 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:30:50,992 INFO L515 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:30:51,015 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (242)] Ended with exit code 0 [2022-02-11 00:30:51,192 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 242 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable249 [2022-02-11 00:30:51,192 INFO L402 AbstractCegarLoop]: === Iteration 251 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:30:51,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:30:51,193 INFO L85 PathProgramCache]: Analyzing trace with hash -847102273, now seen corresponding path program 242 times [2022-02-11 00:30:51,193 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:30:51,193 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1530447821] [2022-02-11 00:30:51,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:30:51,193 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:30:51,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:30:51,363 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:30:51,363 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:30:51,363 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1530447821] [2022-02-11 00:30:51,363 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1530447821] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:30:51,363 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [333039197] [2022-02-11 00:30:51,364 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-11 00:30:51,364 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:30:51,364 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:30:51,365 INFO L229 MonitoredProcess]: Starting monitored process 243 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:30:51,365 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (243)] Waiting until timeout for monitored process [2022-02-11 00:30:51,433 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-11 00:30:51,433 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:30:51,434 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-11 00:30:51,435 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:30:51,713 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 87 treesize of output 71 [2022-02-11 00:30:51,715 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 55 [2022-02-11 00:30:51,795 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:30:51,795 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:30:51,927 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:30:51,927 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 33 treesize of output 33 [2022-02-11 00:30:51,933 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:30:51,933 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 25 treesize of output 25 [2022-02-11 00:30:52,069 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:30:52,069 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [333039197] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:30:52,069 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:30:52,069 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-02-11 00:30:52,069 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114635946] [2022-02-11 00:30:52,069 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:30:52,070 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-11 00:30:52,070 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:30:52,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-11 00:30:52,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=558, Unknown=0, NotChecked=0, Total=650 [2022-02-11 00:30:52,070 INFO L87 Difference]: Start difference. First operand 751 states and 2204 transitions. Second operand has 26 states, 26 states have (on average 1.4615384615384615) internal successors, (38), 26 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) [2022-02-11 00:30:52,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:30:52,683 INFO L93 Difference]: Finished difference Result 871 states and 2442 transitions. [2022-02-11 00:30:52,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-02-11 00:30:52,684 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.4615384615384615) internal successors, (38), 26 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 19 [2022-02-11 00:30:52,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:30:52,685 INFO L225 Difference]: With dead ends: 871 [2022-02-11 00:30:52,685 INFO L226 Difference]: Without dead ends: 868 [2022-02-11 00:30:52,685 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 298 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=227, Invalid=1255, Unknown=0, NotChecked=0, Total=1482 [2022-02-11 00:30:52,685 INFO L934 BasicCegarLoop]: 13 mSDtfsCounter, 81 mSDsluCounter, 265 mSDsCounter, 0 mSdLazyCounter, 598 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 184 SdHoareTripleChecker+Invalid, 630 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 598 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-11 00:30:52,685 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 184 Invalid, 630 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 598 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-11 00:30:52,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 868 states. [2022-02-11 00:30:52,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 868 to 754. [2022-02-11 00:30:52,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 754 states, 753 states have (on average 2.942895086321381) internal successors, (2216), 753 states have internal predecessors, (2216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:30:52,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 754 states to 754 states and 2216 transitions. [2022-02-11 00:30:52,694 INFO L78 Accepts]: Start accepts. Automaton has 754 states and 2216 transitions. Word has length 19 [2022-02-11 00:30:52,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:30:52,694 INFO L470 AbstractCegarLoop]: Abstraction has 754 states and 2216 transitions. [2022-02-11 00:30:52,694 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.4615384615384615) internal successors, (38), 26 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) [2022-02-11 00:30:52,694 INFO L276 IsEmpty]: Start isEmpty. Operand 754 states and 2216 transitions. [2022-02-11 00:30:52,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-02-11 00:30:52,695 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:30:52,695 INFO L515 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:30:52,711 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (243)] Ended with exit code 0 [2022-02-11 00:30:52,895 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable250,243 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:30:52,895 INFO L402 AbstractCegarLoop]: === Iteration 252 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:30:52,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:30:52,896 INFO L85 PathProgramCache]: Analyzing trace with hash 1259681847, now seen corresponding path program 243 times [2022-02-11 00:30:52,896 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:30:52,896 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2048928071] [2022-02-11 00:30:52,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:30:52,896 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:30:52,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:30:53,045 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:30:53,046 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:30:53,046 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2048928071] [2022-02-11 00:30:53,046 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2048928071] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:30:53,046 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1083687701] [2022-02-11 00:30:53,046 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-11 00:30:53,046 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:30:53,046 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:30:53,047 INFO L229 MonitoredProcess]: Starting monitored process 244 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:30:53,047 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (244)] Waiting until timeout for monitored process [2022-02-11 00:30:53,112 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-02-11 00:30:53,112 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:30:53,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-11 00:30:53,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:30:53,388 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 96 treesize of output 80 [2022-02-11 00:30:53,390 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 80 treesize of output 64 [2022-02-11 00:30:53,463 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:30:53,463 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:30:53,558 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:30:53,558 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 63 treesize of output 59 [2022-02-11 00:30:53,564 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:30:53,565 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 51 treesize of output 47 [2022-02-11 00:30:53,755 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:30:53,755 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1083687701] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:30:53,755 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:30:53,755 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-02-11 00:30:53,767 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1669708292] [2022-02-11 00:30:53,767 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:30:53,767 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-11 00:30:53,768 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:30:53,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-11 00:30:53,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=550, Unknown=0, NotChecked=0, Total=650 [2022-02-11 00:30:53,768 INFO L87 Difference]: Start difference. First operand 754 states and 2216 transitions. Second operand has 26 states, 26 states have (on average 1.4615384615384615) internal successors, (38), 26 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) [2022-02-11 00:30:54,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:30:54,245 INFO L93 Difference]: Finished difference Result 818 states and 2322 transitions. [2022-02-11 00:30:54,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-02-11 00:30:54,245 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.4615384615384615) internal successors, (38), 26 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 19 [2022-02-11 00:30:54,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:30:54,246 INFO L225 Difference]: With dead ends: 818 [2022-02-11 00:30:54,246 INFO L226 Difference]: Without dead ends: 815 [2022-02-11 00:30:54,246 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 261 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=202, Invalid=1058, Unknown=0, NotChecked=0, Total=1260 [2022-02-11 00:30:54,246 INFO L934 BasicCegarLoop]: 13 mSDtfsCounter, 81 mSDsluCounter, 247 mSDsCounter, 0 mSdLazyCounter, 439 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 470 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 439 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-11 00:30:54,246 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 151 Invalid, 470 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 439 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-11 00:30:54,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 815 states. [2022-02-11 00:30:54,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 815 to 753. [2022-02-11 00:30:54,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 753 states, 752 states have (on average 2.9375) internal successors, (2209), 752 states have internal predecessors, (2209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:30:54,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 753 states to 753 states and 2209 transitions. [2022-02-11 00:30:54,254 INFO L78 Accepts]: Start accepts. Automaton has 753 states and 2209 transitions. Word has length 19 [2022-02-11 00:30:54,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:30:54,254 INFO L470 AbstractCegarLoop]: Abstraction has 753 states and 2209 transitions. [2022-02-11 00:30:54,254 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.4615384615384615) internal successors, (38), 26 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) [2022-02-11 00:30:54,254 INFO L276 IsEmpty]: Start isEmpty. Operand 753 states and 2209 transitions. [2022-02-11 00:30:54,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-02-11 00:30:54,255 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:30:54,255 INFO L515 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:30:54,271 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (244)] Ended with exit code 0 [2022-02-11 00:30:54,455 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable251,244 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:30:54,456 INFO L402 AbstractCegarLoop]: === Iteration 253 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:30:54,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:30:54,456 INFO L85 PathProgramCache]: Analyzing trace with hash -439246861, now seen corresponding path program 244 times [2022-02-11 00:30:54,456 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:30:54,456 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1330763073] [2022-02-11 00:30:54,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:30:54,456 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:30:54,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:30:54,615 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:30:54,615 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:30:54,615 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1330763073] [2022-02-11 00:30:54,616 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1330763073] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:30:54,616 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [613974036] [2022-02-11 00:30:54,616 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-11 00:30:54,616 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:30:54,616 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:30:54,617 INFO L229 MonitoredProcess]: Starting monitored process 245 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:30:54,617 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (245)] Waiting until timeout for monitored process [2022-02-11 00:30:54,678 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-11 00:30:54,679 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:30:54,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-11 00:30:54,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:30:54,955 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:30:54,955 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:30:55,110 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:30:55,110 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 34 treesize of output 34 [2022-02-11 00:30:55,115 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:30:55,115 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 26 treesize of output 26 [2022-02-11 00:30:55,257 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:30:55,257 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [613974036] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:30:55,257 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:30:55,257 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-02-11 00:30:55,257 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1060584122] [2022-02-11 00:30:55,257 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:30:55,257 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-11 00:30:55,257 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:30:55,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-11 00:30:55,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=561, Unknown=0, NotChecked=0, Total=650 [2022-02-11 00:30:55,258 INFO L87 Difference]: Start difference. First operand 753 states and 2209 transitions. Second operand has 26 states, 26 states have (on average 1.3846153846153846) internal successors, (36), 26 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) [2022-02-11 00:30:55,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:30:55,742 INFO L93 Difference]: Finished difference Result 870 states and 2439 transitions. [2022-02-11 00:30:55,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-02-11 00:30:55,743 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.3846153846153846) internal successors, (36), 26 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 19 [2022-02-11 00:30:55,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:30:55,744 INFO L225 Difference]: With dead ends: 870 [2022-02-11 00:30:55,744 INFO L226 Difference]: Without dead ends: 870 [2022-02-11 00:30:55,744 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=186, Invalid=806, Unknown=0, NotChecked=0, Total=992 [2022-02-11 00:30:55,744 INFO L934 BasicCegarLoop]: 14 mSDtfsCounter, 133 mSDsluCounter, 321 mSDsCounter, 0 mSdLazyCounter, 707 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 201 SdHoareTripleChecker+Invalid, 746 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 707 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-11 00:30:55,744 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [133 Valid, 201 Invalid, 746 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 707 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-11 00:30:55,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 870 states. [2022-02-11 00:30:55,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 870 to 757. [2022-02-11 00:30:55,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 757 states, 756 states have (on average 2.9365079365079363) internal successors, (2220), 756 states have internal predecessors, (2220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:30:55,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 757 states to 757 states and 2220 transitions. [2022-02-11 00:30:55,753 INFO L78 Accepts]: Start accepts. Automaton has 757 states and 2220 transitions. Word has length 19 [2022-02-11 00:30:55,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:30:55,753 INFO L470 AbstractCegarLoop]: Abstraction has 757 states and 2220 transitions. [2022-02-11 00:30:55,753 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.3846153846153846) internal successors, (36), 26 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) [2022-02-11 00:30:55,753 INFO L276 IsEmpty]: Start isEmpty. Operand 757 states and 2220 transitions. [2022-02-11 00:30:55,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-02-11 00:30:55,754 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:30:55,754 INFO L515 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:30:55,770 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (245)] Ended with exit code 0 [2022-02-11 00:30:55,954 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable252,245 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:30:55,954 INFO L402 AbstractCegarLoop]: === Iteration 254 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:30:55,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:30:55,955 INFO L85 PathProgramCache]: Analyzing trace with hash 346807159, now seen corresponding path program 245 times [2022-02-11 00:30:55,955 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:30:55,955 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1252865907] [2022-02-11 00:30:55,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:30:55,955 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:30:55,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:30:56,107 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:30:56,108 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:30:56,108 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1252865907] [2022-02-11 00:30:56,108 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1252865907] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:30:56,108 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1651234503] [2022-02-11 00:30:56,108 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-11 00:30:56,108 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:30:56,108 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:30:56,109 INFO L229 MonitoredProcess]: Starting monitored process 246 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:30:56,109 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (246)] Waiting until timeout for monitored process [2022-02-11 00:30:56,172 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-02-11 00:30:56,172 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:30:56,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-11 00:30:56,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:30:56,431 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 98 treesize of output 82 [2022-02-11 00:30:56,433 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 82 treesize of output 66 [2022-02-11 00:30:56,500 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:30:56,500 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:30:56,591 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:30:56,591 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 65 treesize of output 61 [2022-02-11 00:30:56,597 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:30:56,597 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 53 treesize of output 49 [2022-02-11 00:30:56,781 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:30:56,781 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1651234503] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:30:56,781 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:30:56,781 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-02-11 00:30:56,781 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1280492776] [2022-02-11 00:30:56,781 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:30:56,782 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-11 00:30:56,782 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:30:56,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-11 00:30:56,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=555, Unknown=0, NotChecked=0, Total=650 [2022-02-11 00:30:56,782 INFO L87 Difference]: Start difference. First operand 757 states and 2220 transitions. Second operand has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 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) [2022-02-11 00:30:57,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:30:57,120 INFO L93 Difference]: Finished difference Result 831 states and 2361 transitions. [2022-02-11 00:30:57,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-02-11 00:30:57,121 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 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 19 [2022-02-11 00:30:57,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:30:57,122 INFO L225 Difference]: With dead ends: 831 [2022-02-11 00:30:57,122 INFO L226 Difference]: Without dead ends: 827 [2022-02-11 00:30:57,122 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=146, Invalid=724, Unknown=0, NotChecked=0, Total=870 [2022-02-11 00:30:57,122 INFO L934 BasicCegarLoop]: 11 mSDtfsCounter, 115 mSDsluCounter, 213 mSDsCounter, 0 mSdLazyCounter, 496 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 543 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 496 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-11 00:30:57,122 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [115 Valid, 126 Invalid, 543 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 496 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-11 00:30:57,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 827 states. [2022-02-11 00:30:57,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 827 to 757. [2022-02-11 00:30:57,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 757 states, 756 states have (on average 2.931216931216931) internal successors, (2216), 756 states have internal predecessors, (2216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:30:57,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 757 states to 757 states and 2216 transitions. [2022-02-11 00:30:57,135 INFO L78 Accepts]: Start accepts. Automaton has 757 states and 2216 transitions. Word has length 19 [2022-02-11 00:30:57,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:30:57,135 INFO L470 AbstractCegarLoop]: Abstraction has 757 states and 2216 transitions. [2022-02-11 00:30:57,135 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 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) [2022-02-11 00:30:57,136 INFO L276 IsEmpty]: Start isEmpty. Operand 757 states and 2216 transitions. [2022-02-11 00:30:57,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-02-11 00:30:57,136 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:30:57,136 INFO L515 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:30:57,156 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (246)] Ended with exit code 0 [2022-02-11 00:30:57,337 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable253,246 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:30:57,337 INFO L402 AbstractCegarLoop]: === Iteration 255 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:30:57,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:30:57,337 INFO L85 PathProgramCache]: Analyzing trace with hash -1841376017, now seen corresponding path program 246 times [2022-02-11 00:30:57,337 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:30:57,338 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [767583480] [2022-02-11 00:30:57,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:30:57,338 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:30:57,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:30:57,492 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:30:57,492 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:30:57,493 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [767583480] [2022-02-11 00:30:57,493 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [767583480] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:30:57,493 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1476926406] [2022-02-11 00:30:57,493 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-11 00:30:57,493 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:30:57,493 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:30:57,494 INFO L229 MonitoredProcess]: Starting monitored process 247 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:30:57,494 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (247)] Waiting until timeout for monitored process [2022-02-11 00:30:57,558 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-02-11 00:30:57,559 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:30:57,559 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-11 00:30:57,560 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:30:57,804 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 87 treesize of output 71 [2022-02-11 00:30:57,806 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 55 [2022-02-11 00:30:57,887 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:30:57,887 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:30:58,004 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:30:58,005 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 34 treesize of output 34 [2022-02-11 00:30:58,009 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:30:58,010 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 26 treesize of output 26 [2022-02-11 00:30:58,148 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:30:58,149 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1476926406] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:30:58,149 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:30:58,149 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-02-11 00:30:58,149 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651579535] [2022-02-11 00:30:58,149 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:30:58,149 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-11 00:30:58,149 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:30:58,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-11 00:30:58,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=563, Unknown=0, NotChecked=0, Total=650 [2022-02-11 00:30:58,149 INFO L87 Difference]: Start difference. First operand 757 states and 2216 transitions. Second operand has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 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) [2022-02-11 00:30:58,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:30:58,920 INFO L93 Difference]: Finished difference Result 908 states and 2540 transitions. [2022-02-11 00:30:58,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-02-11 00:30:58,921 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 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 19 [2022-02-11 00:30:58,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:30:58,922 INFO L225 Difference]: With dead ends: 908 [2022-02-11 00:30:58,922 INFO L226 Difference]: Without dead ends: 906 [2022-02-11 00:30:58,922 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 451 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=270, Invalid=1710, Unknown=0, NotChecked=0, Total=1980 [2022-02-11 00:30:58,922 INFO L934 BasicCegarLoop]: 12 mSDtfsCounter, 181 mSDsluCounter, 271 mSDsCounter, 0 mSdLazyCounter, 588 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 181 SdHoareTripleChecker+Valid, 159 SdHoareTripleChecker+Invalid, 666 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 588 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-11 00:30:58,922 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [181 Valid, 159 Invalid, 666 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 588 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-11 00:30:58,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 906 states. [2022-02-11 00:30:58,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 906 to 767. [2022-02-11 00:30:58,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 767 states, 766 states have (on average 2.93733681462141) internal successors, (2250), 766 states have internal predecessors, (2250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:30:58,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 767 states to 767 states and 2250 transitions. [2022-02-11 00:30:58,931 INFO L78 Accepts]: Start accepts. Automaton has 767 states and 2250 transitions. Word has length 19 [2022-02-11 00:30:58,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:30:58,931 INFO L470 AbstractCegarLoop]: Abstraction has 767 states and 2250 transitions. [2022-02-11 00:30:58,931 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 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) [2022-02-11 00:30:58,931 INFO L276 IsEmpty]: Start isEmpty. Operand 767 states and 2250 transitions. [2022-02-11 00:30:58,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-02-11 00:30:58,932 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:30:58,932 INFO L515 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:30:58,948 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (247)] Forceful destruction successful, exit code 0 [2022-02-11 00:30:59,136 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable254,247 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:30:59,136 INFO L402 AbstractCegarLoop]: === Iteration 256 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:30:59,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:30:59,136 INFO L85 PathProgramCache]: Analyzing trace with hash 304794743, now seen corresponding path program 247 times [2022-02-11 00:30:59,136 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:30:59,136 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [341158811] [2022-02-11 00:30:59,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:30:59,137 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:30:59,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:30:59,299 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:30:59,299 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:30:59,299 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [341158811] [2022-02-11 00:30:59,299 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [341158811] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:30:59,299 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [985494762] [2022-02-11 00:30:59,299 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-11 00:30:59,299 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:30:59,299 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:30:59,300 INFO L229 MonitoredProcess]: Starting monitored process 248 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:30:59,301 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (248)] Waiting until timeout for monitored process [2022-02-11 00:30:59,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:30:59,363 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-11 00:30:59,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:30:59,651 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:30:59,651 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:30:59,787 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:30:59,787 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 34 treesize of output 34 [2022-02-11 00:30:59,792 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:30:59,792 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 26 treesize of output 26 [2022-02-11 00:30:59,920 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:30:59,920 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [985494762] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:30:59,920 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:30:59,920 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-02-11 00:30:59,920 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [374692820] [2022-02-11 00:30:59,920 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:30:59,920 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-11 00:30:59,920 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:30:59,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-11 00:30:59,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=561, Unknown=0, NotChecked=0, Total=650 [2022-02-11 00:30:59,921 INFO L87 Difference]: Start difference. First operand 767 states and 2250 transitions. Second operand has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 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) [2022-02-11 00:31:00,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:31:00,542 INFO L93 Difference]: Finished difference Result 869 states and 2456 transitions. [2022-02-11 00:31:00,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-02-11 00:31:00,543 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 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 19 [2022-02-11 00:31:00,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:31:00,544 INFO L225 Difference]: With dead ends: 869 [2022-02-11 00:31:00,544 INFO L226 Difference]: Without dead ends: 869 [2022-02-11 00:31:00,544 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 317 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=211, Invalid=1271, Unknown=0, NotChecked=0, Total=1482 [2022-02-11 00:31:00,545 INFO L934 BasicCegarLoop]: 13 mSDtfsCounter, 106 mSDsluCounter, 325 mSDsCounter, 0 mSdLazyCounter, 632 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 178 SdHoareTripleChecker+Invalid, 665 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 632 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-11 00:31:00,545 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [106 Valid, 178 Invalid, 665 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 632 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-11 00:31:00,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 869 states. [2022-02-11 00:31:00,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 869 to 760. [2022-02-11 00:31:00,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 760 states, 759 states have (on average 2.935441370223979) internal successors, (2228), 759 states have internal predecessors, (2228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:31:00,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 760 states to 760 states and 2228 transitions. [2022-02-11 00:31:00,553 INFO L78 Accepts]: Start accepts. Automaton has 760 states and 2228 transitions. Word has length 19 [2022-02-11 00:31:00,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:31:00,553 INFO L470 AbstractCegarLoop]: Abstraction has 760 states and 2228 transitions. [2022-02-11 00:31:00,553 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 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) [2022-02-11 00:31:00,553 INFO L276 IsEmpty]: Start isEmpty. Operand 760 states and 2228 transitions. [2022-02-11 00:31:00,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-02-11 00:31:00,554 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:31:00,554 INFO L515 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:31:00,570 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (248)] Ended with exit code 0 [2022-02-11 00:31:00,769 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable255,248 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:31:00,770 INFO L402 AbstractCegarLoop]: === Iteration 257 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:31:00,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:31:00,770 INFO L85 PathProgramCache]: Analyzing trace with hash -955577737, now seen corresponding path program 248 times [2022-02-11 00:31:00,770 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:31:00,770 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1989356663] [2022-02-11 00:31:00,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:31:00,770 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:31:00,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:31:00,908 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:31:00,908 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:31:00,908 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1989356663] [2022-02-11 00:31:00,908 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1989356663] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:31:00,908 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1032154045] [2022-02-11 00:31:00,908 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-11 00:31:00,908 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:31:00,908 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:31:00,909 INFO L229 MonitoredProcess]: Starting monitored process 249 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:31:00,910 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (249)] Waiting until timeout for monitored process [2022-02-11 00:31:00,972 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-11 00:31:00,972 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:31:00,973 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-11 00:31:00,974 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:31:01,239 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 87 treesize of output 71 [2022-02-11 00:31:01,241 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 55 [2022-02-11 00:31:01,317 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:31:01,317 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:31:01,468 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:31:01,469 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 41 treesize of output 39 [2022-02-11 00:31:01,474 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:31:01,474 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 29 treesize of output 27 [2022-02-11 00:31:01,593 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:31:01,593 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1032154045] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:31:01,593 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:31:01,593 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-02-11 00:31:01,593 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1211591148] [2022-02-11 00:31:01,593 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:31:01,593 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-11 00:31:01,593 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:31:01,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-11 00:31:01,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=568, Unknown=0, NotChecked=0, Total=650 [2022-02-11 00:31:01,594 INFO L87 Difference]: Start difference. First operand 760 states and 2228 transitions. Second operand has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 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) [2022-02-11 00:31:02,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:31:02,466 INFO L93 Difference]: Finished difference Result 898 states and 2542 transitions. [2022-02-11 00:31:02,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-02-11 00:31:02,467 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 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 19 [2022-02-11 00:31:02,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:31:02,468 INFO L225 Difference]: With dead ends: 898 [2022-02-11 00:31:02,468 INFO L226 Difference]: Without dead ends: 896 [2022-02-11 00:31:02,469 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 373 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=278, Invalid=1528, Unknown=0, NotChecked=0, Total=1806 [2022-02-11 00:31:02,469 INFO L934 BasicCegarLoop]: 8 mSDtfsCounter, 133 mSDsluCounter, 207 mSDsCounter, 0 mSdLazyCounter, 493 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 550 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 493 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-11 00:31:02,469 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [133 Valid, 113 Invalid, 550 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 493 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-11 00:31:02,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 896 states. [2022-02-11 00:31:02,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 896 to 778. [2022-02-11 00:31:02,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 778 states, 777 states have (on average 2.9356499356499355) internal successors, (2281), 777 states have internal predecessors, (2281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:31:02,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 778 states to 778 states and 2281 transitions. [2022-02-11 00:31:02,481 INFO L78 Accepts]: Start accepts. Automaton has 778 states and 2281 transitions. Word has length 19 [2022-02-11 00:31:02,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:31:02,481 INFO L470 AbstractCegarLoop]: Abstraction has 778 states and 2281 transitions. [2022-02-11 00:31:02,481 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 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) [2022-02-11 00:31:02,481 INFO L276 IsEmpty]: Start isEmpty. Operand 778 states and 2281 transitions. [2022-02-11 00:31:02,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-02-11 00:31:02,482 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:31:02,482 INFO L515 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:31:02,498 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (249)] Ended with exit code 0 [2022-02-11 00:31:02,683 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 249 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable256 [2022-02-11 00:31:02,683 INFO L402 AbstractCegarLoop]: === Iteration 258 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:31:02,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:31:02,683 INFO L85 PathProgramCache]: Analyzing trace with hash 1190593023, now seen corresponding path program 249 times [2022-02-11 00:31:02,683 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:31:02,683 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [618005522] [2022-02-11 00:31:02,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:31:02,684 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:31:02,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:31:02,831 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:31:02,831 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:31:02,831 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [618005522] [2022-02-11 00:31:02,831 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [618005522] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:31:02,831 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2086753943] [2022-02-11 00:31:02,831 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-11 00:31:02,831 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:31:02,832 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:31:02,832 INFO L229 MonitoredProcess]: Starting monitored process 250 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:31:02,833 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (250)] Waiting until timeout for monitored process [2022-02-11 00:31:02,899 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-02-11 00:31:02,899 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:31:02,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 33 conjunts are in the unsatisfiable core [2022-02-11 00:31:02,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:31:03,226 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:31:03,226 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:31:03,408 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-02-11 00:31:03,408 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 35 [2022-02-11 00:31:03,410 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2022-02-11 00:31:03,504 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:31:03,504 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2086753943] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:31:03,504 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:31:03,504 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-02-11 00:31:03,504 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [466049039] [2022-02-11 00:31:03,504 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:31:03,504 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-11 00:31:03,504 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:31:03,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-11 00:31:03,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=556, Unknown=0, NotChecked=0, Total=650 [2022-02-11 00:31:03,505 INFO L87 Difference]: Start difference. First operand 778 states and 2281 transitions. Second operand has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 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) [2022-02-11 00:31:05,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:31:05,589 INFO L93 Difference]: Finished difference Result 1116 states and 3125 transitions. [2022-02-11 00:31:05,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-02-11 00:31:05,590 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 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 19 [2022-02-11 00:31:05,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:31:05,591 INFO L225 Difference]: With dead ends: 1116 [2022-02-11 00:31:05,591 INFO L226 Difference]: Without dead ends: 1116 [2022-02-11 00:31:05,592 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1450 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=912, Invalid=4058, Unknown=0, NotChecked=0, Total=4970 [2022-02-11 00:31:05,592 INFO L934 BasicCegarLoop]: 16 mSDtfsCounter, 203 mSDsluCounter, 347 mSDsCounter, 0 mSdLazyCounter, 674 mSolverCounterSat, 127 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 203 SdHoareTripleChecker+Valid, 214 SdHoareTripleChecker+Invalid, 801 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 127 IncrementalHoareTripleChecker+Valid, 674 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-11 00:31:05,592 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [203 Valid, 214 Invalid, 801 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [127 Valid, 674 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-11 00:31:05,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1116 states. [2022-02-11 00:31:05,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1116 to 882. [2022-02-11 00:31:05,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 882 states, 881 states have (on average 3.003405221339387) internal successors, (2646), 881 states have internal predecessors, (2646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:31:05,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 882 states to 882 states and 2646 transitions. [2022-02-11 00:31:05,606 INFO L78 Accepts]: Start accepts. Automaton has 882 states and 2646 transitions. Word has length 19 [2022-02-11 00:31:05,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:31:05,606 INFO L470 AbstractCegarLoop]: Abstraction has 882 states and 2646 transitions. [2022-02-11 00:31:05,606 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 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) [2022-02-11 00:31:05,606 INFO L276 IsEmpty]: Start isEmpty. Operand 882 states and 2646 transitions. [2022-02-11 00:31:05,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-02-11 00:31:05,608 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:31:05,608 INFO L515 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:31:05,624 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (250)] Ended with exit code 0 [2022-02-11 00:31:05,808 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 250 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable257 [2022-02-11 00:31:05,808 INFO L402 AbstractCegarLoop]: === Iteration 259 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:31:05,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:31:05,808 INFO L85 PathProgramCache]: Analyzing trace with hash -997590153, now seen corresponding path program 250 times [2022-02-11 00:31:05,808 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:31:05,809 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [633890276] [2022-02-11 00:31:05,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:31:05,809 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:31:05,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:31:05,946 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:31:05,946 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:31:05,946 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [633890276] [2022-02-11 00:31:05,946 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [633890276] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:31:05,946 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [706948443] [2022-02-11 00:31:05,946 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-11 00:31:05,946 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:31:05,947 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:31:05,947 INFO L229 MonitoredProcess]: Starting monitored process 251 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:31:05,948 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (251)] Waiting until timeout for monitored process [2022-02-11 00:31:06,010 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-11 00:31:06,010 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:31:06,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-11 00:31:06,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:31:06,283 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:31:06,283 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:31:06,440 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:31:06,440 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 41 treesize of output 39 [2022-02-11 00:31:06,445 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:31:06,445 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 29 treesize of output 27 [2022-02-11 00:31:06,563 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:31:06,563 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [706948443] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:31:06,564 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:31:06,564 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-02-11 00:31:06,564 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946079749] [2022-02-11 00:31:06,564 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:31:06,564 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-11 00:31:06,564 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:31:06,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-11 00:31:06,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=566, Unknown=0, NotChecked=0, Total=650 [2022-02-11 00:31:06,564 INFO L87 Difference]: Start difference. First operand 882 states and 2646 transitions. Second operand has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 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) [2022-02-11 00:31:06,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:31:06,978 INFO L93 Difference]: Finished difference Result 950 states and 2779 transitions. [2022-02-11 00:31:06,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-02-11 00:31:06,979 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 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 19 [2022-02-11 00:31:06,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:31:06,980 INFO L225 Difference]: With dead ends: 950 [2022-02-11 00:31:06,980 INFO L226 Difference]: Without dead ends: 950 [2022-02-11 00:31:06,980 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=112, Invalid=758, Unknown=0, NotChecked=0, Total=870 [2022-02-11 00:31:06,980 INFO L934 BasicCegarLoop]: 9 mSDtfsCounter, 50 mSDsluCounter, 342 mSDsCounter, 0 mSdLazyCounter, 702 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 714 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 702 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-11 00:31:06,980 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 158 Invalid, 714 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 702 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-11 00:31:06,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 950 states. [2022-02-11 00:31:06,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 950 to 876. [2022-02-11 00:31:06,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 876 states, 875 states have (on average 3.0) internal successors, (2625), 875 states have internal predecessors, (2625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:31:06,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 876 states to 876 states and 2625 transitions. [2022-02-11 00:31:06,990 INFO L78 Accepts]: Start accepts. Automaton has 876 states and 2625 transitions. Word has length 19 [2022-02-11 00:31:06,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:31:06,990 INFO L470 AbstractCegarLoop]: Abstraction has 876 states and 2625 transitions. [2022-02-11 00:31:06,990 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 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) [2022-02-11 00:31:06,990 INFO L276 IsEmpty]: Start isEmpty. Operand 876 states and 2625 transitions. [2022-02-11 00:31:06,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-02-11 00:31:06,991 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:31:06,991 INFO L515 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:31:07,007 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (251)] Forceful destruction successful, exit code 0 [2022-02-11 00:31:07,192 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 251 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable258 [2022-02-11 00:31:07,192 INFO L402 AbstractCegarLoop]: === Iteration 260 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:31:07,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:31:07,192 INFO L85 PathProgramCache]: Analyzing trace with hash 734365167, now seen corresponding path program 251 times [2022-02-11 00:31:07,192 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:31:07,192 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1961626941] [2022-02-11 00:31:07,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:31:07,192 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:31:07,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:31:07,311 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:31:07,312 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:31:07,312 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1961626941] [2022-02-11 00:31:07,312 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1961626941] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:31:07,312 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [93156716] [2022-02-11 00:31:07,312 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-11 00:31:07,312 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:31:07,312 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:31:07,313 INFO L229 MonitoredProcess]: Starting monitored process 252 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:31:07,313 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (252)] Waiting until timeout for monitored process [2022-02-11 00:31:07,377 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-02-11 00:31:07,378 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:31:07,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-11 00:31:07,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:31:07,689 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 73 [2022-02-11 00:31:07,690 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 57 [2022-02-11 00:31:07,766 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:31:07,766 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:31:07,942 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:31:07,943 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 41 treesize of output 39 [2022-02-11 00:31:07,948 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:31:07,948 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 29 treesize of output 27 [2022-02-11 00:31:08,037 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:31:08,037 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [93156716] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:31:08,037 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:31:08,037 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 27 [2022-02-11 00:31:08,037 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323763264] [2022-02-11 00:31:08,037 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:31:08,038 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-11 00:31:08,038 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:31:08,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-11 00:31:08,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=627, Unknown=0, NotChecked=0, Total=702 [2022-02-11 00:31:08,038 INFO L87 Difference]: Start difference. First operand 876 states and 2625 transitions. Second operand has 27 states, 27 states have (on average 1.4074074074074074) internal successors, (38), 27 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) [2022-02-11 00:31:09,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:31:09,214 INFO L93 Difference]: Finished difference Result 1015 states and 2918 transitions. [2022-02-11 00:31:09,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-02-11 00:31:09,215 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.4074074074074074) internal successors, (38), 27 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 19 [2022-02-11 00:31:09,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:31:09,216 INFO L225 Difference]: With dead ends: 1015 [2022-02-11 00:31:09,216 INFO L226 Difference]: Without dead ends: 1013 [2022-02-11 00:31:09,216 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 431 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=324, Invalid=2028, Unknown=0, NotChecked=0, Total=2352 [2022-02-11 00:31:09,217 INFO L934 BasicCegarLoop]: 8 mSDtfsCounter, 168 mSDsluCounter, 295 mSDsCounter, 0 mSdLazyCounter, 749 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 168 SdHoareTripleChecker+Valid, 160 SdHoareTripleChecker+Invalid, 805 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 749 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-11 00:31:09,217 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [168 Valid, 160 Invalid, 805 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 749 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-11 00:31:09,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1013 states. [2022-02-11 00:31:09,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1013 to 886. [2022-02-11 00:31:09,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 886 states, 885 states have (on average 2.9966101694915253) internal successors, (2652), 885 states have internal predecessors, (2652), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:31:09,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 886 states to 886 states and 2652 transitions. [2022-02-11 00:31:09,227 INFO L78 Accepts]: Start accepts. Automaton has 886 states and 2652 transitions. Word has length 19 [2022-02-11 00:31:09,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:31:09,227 INFO L470 AbstractCegarLoop]: Abstraction has 886 states and 2652 transitions. [2022-02-11 00:31:09,227 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.4074074074074074) internal successors, (38), 27 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) [2022-02-11 00:31:09,227 INFO L276 IsEmpty]: Start isEmpty. Operand 886 states and 2652 transitions. [2022-02-11 00:31:09,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-02-11 00:31:09,228 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:31:09,228 INFO L515 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:31:09,244 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (252)] Ended with exit code 0 [2022-02-11 00:31:09,428 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 252 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable259 [2022-02-11 00:31:09,429 INFO L402 AbstractCegarLoop]: === Iteration 261 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:31:09,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:31:09,429 INFO L85 PathProgramCache]: Analyzing trace with hash -1414431369, now seen corresponding path program 252 times [2022-02-11 00:31:09,429 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:31:09,429 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [457224826] [2022-02-11 00:31:09,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:31:09,429 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:31:09,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:31:09,553 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:31:09,554 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:31:09,554 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [457224826] [2022-02-11 00:31:09,554 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [457224826] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:31:09,554 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [683371664] [2022-02-11 00:31:09,554 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-11 00:31:09,554 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:31:09,554 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:31:09,555 INFO L229 MonitoredProcess]: Starting monitored process 253 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:31:09,555 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (253)] Waiting until timeout for monitored process [2022-02-11 00:31:09,622 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-02-11 00:31:09,622 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:31:09,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-11 00:31:09,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:31:09,947 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:31:09,948 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:31:10,131 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:31:10,131 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 42 treesize of output 40 [2022-02-11 00:31:10,137 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:31:10,137 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 30 treesize of output 28 [2022-02-11 00:31:10,225 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:31:10,225 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [683371664] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:31:10,225 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:31:10,225 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 27 [2022-02-11 00:31:10,225 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [5187315] [2022-02-11 00:31:10,226 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:31:10,226 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-11 00:31:10,226 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:31:10,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-11 00:31:10,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=625, Unknown=0, NotChecked=0, Total=702 [2022-02-11 00:31:10,226 INFO L87 Difference]: Start difference. First operand 886 states and 2652 transitions. Second operand has 27 states, 27 states have (on average 1.4074074074074074) internal successors, (38), 27 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) [2022-02-11 00:31:11,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:31:11,285 INFO L93 Difference]: Finished difference Result 1005 states and 2892 transitions. [2022-02-11 00:31:11,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-02-11 00:31:11,286 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.4074074074074074) internal successors, (38), 27 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 19 [2022-02-11 00:31:11,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:31:11,287 INFO L225 Difference]: With dead ends: 1005 [2022-02-11 00:31:11,287 INFO L226 Difference]: Without dead ends: 1005 [2022-02-11 00:31:11,287 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 407 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=312, Invalid=1944, Unknown=0, NotChecked=0, Total=2256 [2022-02-11 00:31:11,287 INFO L934 BasicCegarLoop]: 7 mSDtfsCounter, 137 mSDsluCounter, 225 mSDsCounter, 0 mSdLazyCounter, 546 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 588 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 546 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-11 00:31:11,287 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [137 Valid, 112 Invalid, 588 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 546 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-11 00:31:11,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1005 states. [2022-02-11 00:31:11,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1005 to 878. [2022-02-11 00:31:11,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 878 states, 877 states have (on average 2.9954389965792476) internal successors, (2627), 877 states have internal predecessors, (2627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:31:11,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 878 states to 878 states and 2627 transitions. [2022-02-11 00:31:11,297 INFO L78 Accepts]: Start accepts. Automaton has 878 states and 2627 transitions. Word has length 19 [2022-02-11 00:31:11,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:31:11,297 INFO L470 AbstractCegarLoop]: Abstraction has 878 states and 2627 transitions. [2022-02-11 00:31:11,297 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.4074074074074074) internal successors, (38), 27 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) [2022-02-11 00:31:11,297 INFO L276 IsEmpty]: Start isEmpty. Operand 878 states and 2627 transitions. [2022-02-11 00:31:11,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-02-11 00:31:11,298 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:31:11,298 INFO L515 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:31:11,314 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (253)] Ended with exit code 0 [2022-02-11 00:31:11,498 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable260,253 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:31:11,499 INFO L402 AbstractCegarLoop]: === Iteration 262 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:31:11,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:31:11,499 INFO L85 PathProgramCache]: Analyzing trace with hash 692352751, now seen corresponding path program 253 times [2022-02-11 00:31:11,499 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:31:11,499 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [525998036] [2022-02-11 00:31:11,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:31:11,499 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:31:11,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:31:11,620 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:31:11,620 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:31:11,620 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [525998036] [2022-02-11 00:31:11,620 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [525998036] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:31:11,620 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1457283802] [2022-02-11 00:31:11,620 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-11 00:31:11,620 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:31:11,620 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:31:11,622 INFO L229 MonitoredProcess]: Starting monitored process 254 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:31:11,623 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (254)] Waiting until timeout for monitored process [2022-02-11 00:31:11,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:31:11,684 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-11 00:31:11,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:31:11,985 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:31:11,986 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:31:12,209 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:31:12,210 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 42 treesize of output 40 [2022-02-11 00:31:12,215 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:31:12,215 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 30 treesize of output 28 [2022-02-11 00:31:12,310 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:31:12,310 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1457283802] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:31:12,310 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:31:12,310 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 27 [2022-02-11 00:31:12,310 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1514482516] [2022-02-11 00:31:12,311 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:31:12,311 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-11 00:31:12,311 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:31:12,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-11 00:31:12,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=625, Unknown=0, NotChecked=0, Total=702 [2022-02-11 00:31:12,311 INFO L87 Difference]: Start difference. First operand 878 states and 2627 transitions. Second operand has 27 states, 27 states have (on average 1.4074074074074074) internal successors, (38), 27 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) [2022-02-11 00:31:13,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:31:13,120 INFO L93 Difference]: Finished difference Result 964 states and 2804 transitions. [2022-02-11 00:31:13,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-02-11 00:31:13,120 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.4074074074074074) internal successors, (38), 27 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 19 [2022-02-11 00:31:13,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:31:13,122 INFO L225 Difference]: With dead ends: 964 [2022-02-11 00:31:13,122 INFO L226 Difference]: Without dead ends: 964 [2022-02-11 00:31:13,122 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 328 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=219, Invalid=1673, Unknown=0, NotChecked=0, Total=1892 [2022-02-11 00:31:13,122 INFO L934 BasicCegarLoop]: 8 mSDtfsCounter, 93 mSDsluCounter, 320 mSDsCounter, 0 mSdLazyCounter, 613 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 638 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 613 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-11 00:31:13,122 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [93 Valid, 146 Invalid, 638 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 613 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-11 00:31:13,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 964 states. [2022-02-11 00:31:13,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 964 to 877. [2022-02-11 00:31:13,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 877 states, 876 states have (on average 2.9942922374429224) internal successors, (2623), 876 states have internal predecessors, (2623), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:31:13,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 877 states to 877 states and 2623 transitions. [2022-02-11 00:31:13,132 INFO L78 Accepts]: Start accepts. Automaton has 877 states and 2623 transitions. Word has length 19 [2022-02-11 00:31:13,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:31:13,132 INFO L470 AbstractCegarLoop]: Abstraction has 877 states and 2623 transitions. [2022-02-11 00:31:13,132 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.4074074074074074) internal successors, (38), 27 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) [2022-02-11 00:31:13,132 INFO L276 IsEmpty]: Start isEmpty. Operand 877 states and 2623 transitions. [2022-02-11 00:31:13,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-02-11 00:31:13,133 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:31:13,133 INFO L515 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:31:13,149 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (254)] Forceful destruction successful, exit code 0 [2022-02-11 00:31:13,333 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable261,254 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:31:13,333 INFO L402 AbstractCegarLoop]: === Iteration 263 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:31:13,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:31:13,333 INFO L85 PathProgramCache]: Analyzing trace with hash 1578151031, now seen corresponding path program 254 times [2022-02-11 00:31:13,334 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:31:13,334 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1970914856] [2022-02-11 00:31:13,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:31:13,334 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:31:13,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:31:13,450 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:31:13,451 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:31:13,451 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1970914856] [2022-02-11 00:31:13,451 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1970914856] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:31:13,451 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2009106698] [2022-02-11 00:31:13,451 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-11 00:31:13,451 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:31:13,451 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:31:13,452 INFO L229 MonitoredProcess]: Starting monitored process 255 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:31:13,452 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (255)] Waiting until timeout for monitored process [2022-02-11 00:31:13,530 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-11 00:31:13,531 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:31:13,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-11 00:31:13,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:31:13,811 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:31:13,812 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:31:14,011 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:31:14,012 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 42 treesize of output 40 [2022-02-11 00:31:14,017 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:31:14,017 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 30 treesize of output 28 [2022-02-11 00:31:14,121 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:31:14,122 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2009106698] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:31:14,122 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:31:14,122 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 27 [2022-02-11 00:31:14,122 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1924771906] [2022-02-11 00:31:14,122 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:31:14,122 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-11 00:31:14,122 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:31:14,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-11 00:31:14,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=626, Unknown=0, NotChecked=0, Total=702 [2022-02-11 00:31:14,123 INFO L87 Difference]: Start difference. First operand 877 states and 2623 transitions. Second operand has 27 states, 27 states have (on average 1.4074074074074074) internal successors, (38), 27 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) [2022-02-11 00:31:14,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:31:14,551 INFO L93 Difference]: Finished difference Result 951 states and 2771 transitions. [2022-02-11 00:31:14,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-02-11 00:31:14,551 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.4074074074074074) internal successors, (38), 27 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 19 [2022-02-11 00:31:14,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:31:14,552 INFO L225 Difference]: With dead ends: 951 [2022-02-11 00:31:14,552 INFO L226 Difference]: Without dead ends: 951 [2022-02-11 00:31:14,552 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=122, Invalid=934, Unknown=0, NotChecked=0, Total=1056 [2022-02-11 00:31:14,552 INFO L934 BasicCegarLoop]: 8 mSDtfsCounter, 64 mSDsluCounter, 322 mSDsCounter, 0 mSdLazyCounter, 620 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 626 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 620 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-11 00:31:14,552 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 147 Invalid, 626 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 620 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-11 00:31:14,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 951 states. [2022-02-11 00:31:14,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 951 to 868. [2022-02-11 00:31:14,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 868 states, 867 states have (on average 2.991926182237601) internal successors, (2594), 867 states have internal predecessors, (2594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:31:14,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 868 states to 868 states and 2594 transitions. [2022-02-11 00:31:14,562 INFO L78 Accepts]: Start accepts. Automaton has 868 states and 2594 transitions. Word has length 19 [2022-02-11 00:31:14,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:31:14,562 INFO L470 AbstractCegarLoop]: Abstraction has 868 states and 2594 transitions. [2022-02-11 00:31:14,562 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.4074074074074074) internal successors, (38), 27 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) [2022-02-11 00:31:14,562 INFO L276 IsEmpty]: Start isEmpty. Operand 868 states and 2594 transitions. [2022-02-11 00:31:14,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-02-11 00:31:14,563 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:31:14,563 INFO L515 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:31:14,579 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (255)] Forceful destruction successful, exit code 0 [2022-02-11 00:31:14,763 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable262,255 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:31:14,763 INFO L402 AbstractCegarLoop]: === Iteration 264 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:31:14,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:31:14,763 INFO L85 PathProgramCache]: Analyzing trace with hash 1958855983, now seen corresponding path program 255 times [2022-02-11 00:31:14,763 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:31:14,764 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1931199570] [2022-02-11 00:31:14,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:31:14,764 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:31:14,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:31:14,865 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:31:14,865 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:31:14,865 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1931199570] [2022-02-11 00:31:14,865 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1931199570] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:31:14,865 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1187528104] [2022-02-11 00:31:14,865 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-11 00:31:14,865 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:31:14,865 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:31:14,866 INFO L229 MonitoredProcess]: Starting monitored process 256 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:31:14,867 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (256)] Waiting until timeout for monitored process [2022-02-11 00:31:14,932 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-11 00:31:14,932 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:31:14,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 34 conjunts are in the unsatisfiable core [2022-02-11 00:31:14,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:31:15,285 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:31:15,285 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:31:15,478 INFO L353 Elim1Store]: treesize reduction 19, result has 34.5 percent of original size [2022-02-11 00:31:15,478 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 57 treesize of output 51 [2022-02-11 00:31:15,483 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:31:15,483 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 31 treesize of output 29 [2022-02-11 00:31:15,579 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:31:15,579 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1187528104] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:31:15,579 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:31:15,579 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 28 [2022-02-11 00:31:15,579 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1249886740] [2022-02-11 00:31:15,579 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:31:15,579 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-02-11 00:31:15,579 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:31:15,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-02-11 00:31:15,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=663, Unknown=0, NotChecked=0, Total=756 [2022-02-11 00:31:15,579 INFO L87 Difference]: Start difference. First operand 868 states and 2594 transitions. Second operand has 28 states, 28 states have (on average 1.5) internal successors, (42), 28 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:31:16,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:31:16,003 INFO L93 Difference]: Finished difference Result 992 states and 2849 transitions. [2022-02-11 00:31:16,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-02-11 00:31:16,004 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.5) internal successors, (42), 28 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-02-11 00:31:16,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:31:16,005 INFO L225 Difference]: With dead ends: 992 [2022-02-11 00:31:16,005 INFO L226 Difference]: Without dead ends: 992 [2022-02-11 00:31:16,005 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 299 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=145, Invalid=977, Unknown=0, NotChecked=0, Total=1122 [2022-02-11 00:31:16,005 INFO L934 BasicCegarLoop]: 16 mSDtfsCounter, 111 mSDsluCounter, 390 mSDsCounter, 0 mSdLazyCounter, 629 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 230 SdHoareTripleChecker+Invalid, 654 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 629 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-11 00:31:16,005 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 230 Invalid, 654 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 629 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-11 00:31:16,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 992 states. [2022-02-11 00:31:16,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 992 to 880. [2022-02-11 00:31:16,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 880 states, 879 states have (on average 2.9954493742889645) internal successors, (2633), 879 states have internal predecessors, (2633), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:31:16,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 880 states to 880 states and 2633 transitions. [2022-02-11 00:31:16,015 INFO L78 Accepts]: Start accepts. Automaton has 880 states and 2633 transitions. Word has length 19 [2022-02-11 00:31:16,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:31:16,016 INFO L470 AbstractCegarLoop]: Abstraction has 880 states and 2633 transitions. [2022-02-11 00:31:16,016 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.5) internal successors, (42), 28 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:31:16,016 INFO L276 IsEmpty]: Start isEmpty. Operand 880 states and 2633 transitions. [2022-02-11 00:31:16,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-02-11 00:31:16,017 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:31:16,017 INFO L515 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:31:16,037 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (256)] Ended with exit code 0 [2022-02-11 00:31:16,217 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable263,256 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:31:16,217 INFO L402 AbstractCegarLoop]: === Iteration 265 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:31:16,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:31:16,217 INFO L85 PathProgramCache]: Analyzing trace with hash -1450313033, now seen corresponding path program 256 times [2022-02-11 00:31:16,217 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:31:16,217 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1279821293] [2022-02-11 00:31:16,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:31:16,218 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:31:16,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:31:16,334 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:31:16,334 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:31:16,334 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1279821293] [2022-02-11 00:31:16,334 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1279821293] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:31:16,334 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [690791518] [2022-02-11 00:31:16,334 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-11 00:31:16,334 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:31:16,335 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:31:16,335 INFO L229 MonitoredProcess]: Starting monitored process 257 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:31:16,337 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (257)] Waiting until timeout for monitored process [2022-02-11 00:31:16,401 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-11 00:31:16,401 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:31:16,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-11 00:31:16,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:31:16,723 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:31:16,723 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:31:16,909 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:31:16,909 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 42 treesize of output 40 [2022-02-11 00:31:16,915 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:31:16,915 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 30 treesize of output 28 [2022-02-11 00:31:17,012 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:31:17,012 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [690791518] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:31:17,012 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:31:17,012 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 27 [2022-02-11 00:31:17,012 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1186945635] [2022-02-11 00:31:17,012 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:31:17,013 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-11 00:31:17,013 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:31:17,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-11 00:31:17,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=616, Unknown=0, NotChecked=0, Total=702 [2022-02-11 00:31:17,013 INFO L87 Difference]: Start difference. First operand 880 states and 2633 transitions. Second operand has 27 states, 27 states have (on average 1.5185185185185186) internal successors, (41), 27 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) [2022-02-11 00:31:17,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:31:17,800 INFO L93 Difference]: Finished difference Result 1032 states and 2950 transitions. [2022-02-11 00:31:17,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-02-11 00:31:17,801 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.5185185185185186) internal successors, (41), 27 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 19 [2022-02-11 00:31:17,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:31:17,802 INFO L225 Difference]: With dead ends: 1032 [2022-02-11 00:31:17,802 INFO L226 Difference]: Without dead ends: 1032 [2022-02-11 00:31:17,802 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 487 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=233, Invalid=1659, Unknown=0, NotChecked=0, Total=1892 [2022-02-11 00:31:17,802 INFO L934 BasicCegarLoop]: 14 mSDtfsCounter, 103 mSDsluCounter, 327 mSDsCounter, 0 mSdLazyCounter, 604 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 205 SdHoareTripleChecker+Invalid, 642 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 604 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-11 00:31:17,802 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [103 Valid, 205 Invalid, 642 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 604 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-11 00:31:17,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1032 states. [2022-02-11 00:31:17,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1032 to 872. [2022-02-11 00:31:17,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 872 states, 871 states have (on average 2.9908151549942597) internal successors, (2605), 871 states have internal predecessors, (2605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:31:17,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 872 states to 872 states and 2605 transitions. [2022-02-11 00:31:17,812 INFO L78 Accepts]: Start accepts. Automaton has 872 states and 2605 transitions. Word has length 19 [2022-02-11 00:31:17,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:31:17,812 INFO L470 AbstractCegarLoop]: Abstraction has 872 states and 2605 transitions. [2022-02-11 00:31:17,813 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.5185185185185186) internal successors, (41), 27 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) [2022-02-11 00:31:17,813 INFO L276 IsEmpty]: Start isEmpty. Operand 872 states and 2605 transitions. [2022-02-11 00:31:17,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-02-11 00:31:17,813 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:31:17,814 INFO L515 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:31:17,831 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (257)] Forceful destruction successful, exit code 0 [2022-02-11 00:31:18,027 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable264,257 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:31:18,027 INFO L402 AbstractCegarLoop]: === Iteration 266 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:31:18,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:31:18,027 INFO L85 PathProgramCache]: Analyzing trace with hash 690070315, now seen corresponding path program 257 times [2022-02-11 00:31:18,028 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:31:18,028 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [214524152] [2022-02-11 00:31:18,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:31:18,028 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:31:18,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:31:18,145 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:31:18,146 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:31:18,146 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [214524152] [2022-02-11 00:31:18,146 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [214524152] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:31:18,146 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [822159187] [2022-02-11 00:31:18,146 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-11 00:31:18,146 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:31:18,146 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:31:18,147 INFO L229 MonitoredProcess]: Starting monitored process 258 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:31:18,147 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (258)] Waiting until timeout for monitored process [2022-02-11 00:31:18,214 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-02-11 00:31:18,214 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:31:18,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-11 00:31:18,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:31:18,538 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:31:18,538 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:31:18,745 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:31:18,746 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 42 treesize of output 40 [2022-02-11 00:31:18,751 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:31:18,751 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 30 treesize of output 28 [2022-02-11 00:31:18,839 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:31:18,839 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [822159187] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:31:18,839 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:31:18,839 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 27 [2022-02-11 00:31:18,839 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [286719691] [2022-02-11 00:31:18,840 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:31:18,840 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-11 00:31:18,840 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:31:18,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-11 00:31:18,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=619, Unknown=0, NotChecked=0, Total=702 [2022-02-11 00:31:18,840 INFO L87 Difference]: Start difference. First operand 872 states and 2605 transitions. Second operand has 27 states, 27 states have (on average 1.5185185185185186) internal successors, (41), 27 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) [2022-02-11 00:31:19,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:31:19,881 INFO L93 Difference]: Finished difference Result 1013 states and 2888 transitions. [2022-02-11 00:31:19,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-02-11 00:31:19,881 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.5185185185185186) internal successors, (41), 27 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 19 [2022-02-11 00:31:19,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:31:19,882 INFO L225 Difference]: With dead ends: 1013 [2022-02-11 00:31:19,882 INFO L226 Difference]: Without dead ends: 1013 [2022-02-11 00:31:19,882 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 621 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=367, Invalid=2183, Unknown=0, NotChecked=0, Total=2550 [2022-02-11 00:31:19,883 INFO L934 BasicCegarLoop]: 15 mSDtfsCounter, 143 mSDsluCounter, 302 mSDsCounter, 0 mSdLazyCounter, 634 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 212 SdHoareTripleChecker+Invalid, 726 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 634 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-11 00:31:19,883 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [143 Valid, 212 Invalid, 726 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 634 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-11 00:31:19,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1013 states. [2022-02-11 00:31:19,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1013 to 869. [2022-02-11 00:31:19,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 869 states, 868 states have (on average 2.988479262672811) internal successors, (2594), 868 states have internal predecessors, (2594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:31:19,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 869 states to 869 states and 2594 transitions. [2022-02-11 00:31:19,892 INFO L78 Accepts]: Start accepts. Automaton has 869 states and 2594 transitions. Word has length 19 [2022-02-11 00:31:19,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:31:19,893 INFO L470 AbstractCegarLoop]: Abstraction has 869 states and 2594 transitions. [2022-02-11 00:31:19,893 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.5185185185185186) internal successors, (41), 27 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) [2022-02-11 00:31:19,893 INFO L276 IsEmpty]: Start isEmpty. Operand 869 states and 2594 transitions. [2022-02-11 00:31:19,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-02-11 00:31:19,894 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:31:19,894 INFO L515 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:31:19,910 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (258)] Ended with exit code 0 [2022-02-11 00:31:20,094 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 258 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable265 [2022-02-11 00:31:20,094 INFO L402 AbstractCegarLoop]: === Iteration 267 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:31:20,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:31:20,094 INFO L85 PathProgramCache]: Analyzing trace with hash -724088337, now seen corresponding path program 258 times [2022-02-11 00:31:20,094 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:31:20,094 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1570854670] [2022-02-11 00:31:20,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:31:20,095 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:31:20,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:31:20,210 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:31:20,210 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:31:20,210 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1570854670] [2022-02-11 00:31:20,210 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1570854670] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:31:20,210 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1574785896] [2022-02-11 00:31:20,210 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-11 00:31:20,210 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:31:20,210 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:31:20,211 INFO L229 MonitoredProcess]: Starting monitored process 259 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:31:20,212 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (259)] Waiting until timeout for monitored process [2022-02-11 00:31:20,278 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-02-11 00:31:20,278 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:31:20,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-11 00:31:20,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:31:20,591 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 96 treesize of output 80 [2022-02-11 00:31:20,593 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 80 treesize of output 64 [2022-02-11 00:31:20,669 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:31:20,669 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:31:20,815 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:31:20,815 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 73 treesize of output 67 [2022-02-11 00:31:20,822 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:31:20,822 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 57 treesize of output 51 [2022-02-11 00:31:20,957 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:31:20,957 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1574785896] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:31:20,957 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:31:20,957 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 27 [2022-02-11 00:31:20,957 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744575065] [2022-02-11 00:31:20,957 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:31:20,958 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-11 00:31:20,958 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:31:20,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-11 00:31:20,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=599, Unknown=0, NotChecked=0, Total=702 [2022-02-11 00:31:20,958 INFO L87 Difference]: Start difference. First operand 869 states and 2594 transitions. Second operand has 27 states, 27 states have (on average 1.4074074074074074) internal successors, (38), 27 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) [2022-02-11 00:31:21,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:31:21,501 INFO L93 Difference]: Finished difference Result 954 states and 2728 transitions. [2022-02-11 00:31:21,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-02-11 00:31:21,502 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.4074074074074074) internal successors, (38), 27 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 19 [2022-02-11 00:31:21,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:31:21,503 INFO L225 Difference]: With dead ends: 954 [2022-02-11 00:31:21,503 INFO L226 Difference]: Without dead ends: 946 [2022-02-11 00:31:21,503 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 337 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=222, Invalid=1260, Unknown=0, NotChecked=0, Total=1482 [2022-02-11 00:31:21,503 INFO L934 BasicCegarLoop]: 16 mSDtfsCounter, 126 mSDsluCounter, 334 mSDsCounter, 0 mSdLazyCounter, 561 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 231 SdHoareTripleChecker+Invalid, 615 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 561 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-11 00:31:21,503 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [126 Valid, 231 Invalid, 615 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 561 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-11 00:31:21,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 946 states. [2022-02-11 00:31:21,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 946 to 859. [2022-02-11 00:31:21,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 859 states, 858 states have (on average 2.976689976689977) internal successors, (2554), 858 states have internal predecessors, (2554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:31:21,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 859 states to 859 states and 2554 transitions. [2022-02-11 00:31:21,513 INFO L78 Accepts]: Start accepts. Automaton has 859 states and 2554 transitions. Word has length 19 [2022-02-11 00:31:21,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:31:21,513 INFO L470 AbstractCegarLoop]: Abstraction has 859 states and 2554 transitions. [2022-02-11 00:31:21,513 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.4074074074074074) internal successors, (38), 27 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) [2022-02-11 00:31:21,513 INFO L276 IsEmpty]: Start isEmpty. Operand 859 states and 2554 transitions. [2022-02-11 00:31:21,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-02-11 00:31:21,514 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:31:21,514 INFO L515 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:31:21,530 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (259)] Ended with exit code 0 [2022-02-11 00:31:21,714 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 259 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable266 [2022-02-11 00:31:21,715 INFO L402 AbstractCegarLoop]: === Iteration 268 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:31:21,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:31:21,715 INFO L85 PathProgramCache]: Analyzing trace with hash -1984456785, now seen corresponding path program 259 times [2022-02-11 00:31:21,715 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:31:21,715 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1725513383] [2022-02-11 00:31:21,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:31:21,715 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:31:21,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:31:21,846 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:31:21,846 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:31:21,846 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1725513383] [2022-02-11 00:31:21,847 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1725513383] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:31:21,847 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [76523714] [2022-02-11 00:31:21,847 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-11 00:31:21,847 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:31:21,847 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:31:21,848 INFO L229 MonitoredProcess]: Starting monitored process 260 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:31:21,848 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (260)] Waiting until timeout for monitored process [2022-02-11 00:31:21,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:31:21,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 37 conjunts are in the unsatisfiable core [2022-02-11 00:31:21,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:31:22,317 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 119 treesize of output 95 [2022-02-11 00:31:22,320 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 55 [2022-02-11 00:31:22,396 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:31:22,396 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:31:22,646 INFO L353 Elim1Store]: treesize reduction 40, result has 34.4 percent of original size [2022-02-11 00:31:22,646 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 78 treesize of output 74 [2022-02-11 00:31:22,649 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:31:22,657 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:31:22,658 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 44 treesize of output 46 [2022-02-11 00:31:22,779 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:31:22,779 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [76523714] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:31:22,779 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:31:22,779 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 27 [2022-02-11 00:31:22,779 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [340681469] [2022-02-11 00:31:22,779 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:31:22,780 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-11 00:31:22,780 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:31:22,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-11 00:31:22,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=594, Unknown=0, NotChecked=0, Total=702 [2022-02-11 00:31:22,780 INFO L87 Difference]: Start difference. First operand 859 states and 2554 transitions. Second operand has 27 states, 27 states have (on average 1.4444444444444444) internal successors, (39), 27 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) [2022-02-11 00:31:23,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:31:23,913 INFO L93 Difference]: Finished difference Result 1036 states and 2919 transitions. [2022-02-11 00:31:23,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-02-11 00:31:23,913 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.4444444444444444) internal successors, (39), 27 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 19 [2022-02-11 00:31:23,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:31:23,915 INFO L225 Difference]: With dead ends: 1036 [2022-02-11 00:31:23,915 INFO L226 Difference]: Without dead ends: 1036 [2022-02-11 00:31:23,915 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 510 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=336, Invalid=1644, Unknown=0, NotChecked=0, Total=1980 [2022-02-11 00:31:23,915 INFO L934 BasicCegarLoop]: 16 mSDtfsCounter, 176 mSDsluCounter, 263 mSDsCounter, 0 mSdLazyCounter, 532 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 176 SdHoareTripleChecker+Valid, 179 SdHoareTripleChecker+Invalid, 592 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 532 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-11 00:31:23,915 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [176 Valid, 179 Invalid, 592 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 532 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-11 00:31:23,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1036 states. [2022-02-11 00:31:23,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1036 to 867. [2022-02-11 00:31:23,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 867 states, 866 states have (on average 2.9826789838337184) internal successors, (2583), 866 states have internal predecessors, (2583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:31:23,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 867 states to 867 states and 2583 transitions. [2022-02-11 00:31:23,925 INFO L78 Accepts]: Start accepts. Automaton has 867 states and 2583 transitions. Word has length 19 [2022-02-11 00:31:23,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:31:23,925 INFO L470 AbstractCegarLoop]: Abstraction has 867 states and 2583 transitions. [2022-02-11 00:31:23,925 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.4444444444444444) internal successors, (39), 27 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) [2022-02-11 00:31:23,925 INFO L276 IsEmpty]: Start isEmpty. Operand 867 states and 2583 transitions. [2022-02-11 00:31:23,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-02-11 00:31:23,926 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:31:23,926 INFO L515 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:31:23,943 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (260)] Ended with exit code 0 [2022-02-11 00:31:24,127 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 260 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable267 [2022-02-11 00:31:24,127 INFO L402 AbstractCegarLoop]: === Iteration 269 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:31:24,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:31:24,127 INFO L85 PathProgramCache]: Analyzing trace with hash -276701005, now seen corresponding path program 260 times [2022-02-11 00:31:24,127 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:31:24,127 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [313823122] [2022-02-11 00:31:24,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:31:24,127 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:31:24,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:31:24,310 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:31:24,311 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:31:24,311 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [313823122] [2022-02-11 00:31:24,311 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [313823122] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:31:24,311 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1413388024] [2022-02-11 00:31:24,311 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-11 00:31:24,311 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:31:24,311 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:31:24,312 INFO L229 MonitoredProcess]: Starting monitored process 261 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:31:24,312 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (261)] Waiting until timeout for monitored process [2022-02-11 00:31:24,376 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-11 00:31:24,376 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:31:24,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 33 conjunts are in the unsatisfiable core [2022-02-11 00:31:24,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:31:24,772 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 77 treesize of output 61 [2022-02-11 00:31:24,774 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 37 [2022-02-11 00:31:24,793 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:31:24,793 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:31:25,053 INFO L353 Elim1Store]: treesize reduction 25, result has 24.2 percent of original size [2022-02-11 00:31:25,054 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 63 treesize of output 51 [2022-02-11 00:31:25,060 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:31:25,060 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 33 treesize of output 29 [2022-02-11 00:31:25,111 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:31:25,111 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1413388024] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:31:25,111 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:31:25,111 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-02-11 00:31:25,111 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546186677] [2022-02-11 00:31:25,111 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:31:25,112 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-02-11 00:31:25,112 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:31:25,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-02-11 00:31:25,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=452, Unknown=0, NotChecked=0, Total=552 [2022-02-11 00:31:25,112 INFO L87 Difference]: Start difference. First operand 867 states and 2583 transitions. Second operand has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:31:25,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:31:25,804 INFO L93 Difference]: Finished difference Result 996 states and 2845 transitions. [2022-02-11 00:31:25,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-02-11 00:31:25,804 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-02-11 00:31:25,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:31:25,805 INFO L225 Difference]: With dead ends: 996 [2022-02-11 00:31:25,805 INFO L226 Difference]: Without dead ends: 988 [2022-02-11 00:31:25,805 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 272 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=222, Invalid=900, Unknown=0, NotChecked=0, Total=1122 [2022-02-11 00:31:25,805 INFO L934 BasicCegarLoop]: 12 mSDtfsCounter, 150 mSDsluCounter, 258 mSDsCounter, 0 mSdLazyCounter, 453 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 166 SdHoareTripleChecker+Invalid, 510 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 453 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-11 00:31:25,805 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [150 Valid, 166 Invalid, 510 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 453 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-11 00:31:25,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 988 states. [2022-02-11 00:31:25,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 988 to 887. [2022-02-11 00:31:25,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 887 states, 886 states have (on average 2.9909706546275396) internal successors, (2650), 886 states have internal predecessors, (2650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:31:25,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 887 states to 887 states and 2650 transitions. [2022-02-11 00:31:25,815 INFO L78 Accepts]: Start accepts. Automaton has 887 states and 2650 transitions. Word has length 19 [2022-02-11 00:31:25,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:31:25,815 INFO L470 AbstractCegarLoop]: Abstraction has 887 states and 2650 transitions. [2022-02-11 00:31:25,815 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:31:25,815 INFO L276 IsEmpty]: Start isEmpty. Operand 887 states and 2650 transitions. [2022-02-11 00:31:25,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-02-11 00:31:25,816 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:31:25,816 INFO L515 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:31:25,832 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (261)] Ended with exit code 0 [2022-02-11 00:31:26,017 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 261 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable268 [2022-02-11 00:31:26,017 INFO L402 AbstractCegarLoop]: === Iteration 270 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:31:26,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:31:26,017 INFO L85 PathProgramCache]: Analyzing trace with hash -1029155797, now seen corresponding path program 261 times [2022-02-11 00:31:26,017 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:31:26,017 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1407204736] [2022-02-11 00:31:26,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:31:26,017 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:31:26,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:31:26,171 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:31:26,171 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:31:26,171 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1407204736] [2022-02-11 00:31:26,171 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1407204736] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:31:26,171 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [835508033] [2022-02-11 00:31:26,171 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-11 00:31:26,171 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:31:26,171 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:31:26,172 INFO L229 MonitoredProcess]: Starting monitored process 262 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:31:26,172 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (262)] Waiting until timeout for monitored process [2022-02-11 00:31:26,243 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-02-11 00:31:26,243 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:31:26,244 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-11 00:31:26,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:31:26,526 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:31:26,526 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:31:26,671 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:31:26,672 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 34 treesize of output 34 [2022-02-11 00:31:26,676 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:31:26,676 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 26 treesize of output 26 [2022-02-11 00:31:26,800 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:31:26,800 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [835508033] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:31:26,800 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:31:26,800 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-02-11 00:31:26,800 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [152159125] [2022-02-11 00:31:26,800 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:31:26,800 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-11 00:31:26,800 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:31:26,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-11 00:31:26,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=554, Unknown=0, NotChecked=0, Total=650 [2022-02-11 00:31:26,801 INFO L87 Difference]: Start difference. First operand 887 states and 2650 transitions. Second operand has 26 states, 26 states have (on average 1.5384615384615385) internal successors, (40), 26 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) [2022-02-11 00:31:27,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:31:27,376 INFO L93 Difference]: Finished difference Result 1031 states and 2938 transitions. [2022-02-11 00:31:27,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-02-11 00:31:27,376 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.5384615384615385) internal successors, (40), 26 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 19 [2022-02-11 00:31:27,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:31:27,377 INFO L225 Difference]: With dead ends: 1031 [2022-02-11 00:31:27,377 INFO L226 Difference]: Without dead ends: 1031 [2022-02-11 00:31:27,377 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 419 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=241, Invalid=1319, Unknown=0, NotChecked=0, Total=1560 [2022-02-11 00:31:27,377 INFO L934 BasicCegarLoop]: 14 mSDtfsCounter, 91 mSDsluCounter, 232 mSDsCounter, 0 mSdLazyCounter, 473 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 544 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 473 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-11 00:31:27,378 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [91 Valid, 153 Invalid, 544 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 473 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-11 00:31:27,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1031 states. [2022-02-11 00:31:27,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1031 to 896. [2022-02-11 00:31:27,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 896 states, 895 states have (on average 2.9921787709497205) internal successors, (2678), 895 states have internal predecessors, (2678), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:31:27,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 896 states to 896 states and 2678 transitions. [2022-02-11 00:31:27,388 INFO L78 Accepts]: Start accepts. Automaton has 896 states and 2678 transitions. Word has length 19 [2022-02-11 00:31:27,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:31:27,388 INFO L470 AbstractCegarLoop]: Abstraction has 896 states and 2678 transitions. [2022-02-11 00:31:27,388 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.5384615384615385) internal successors, (40), 26 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) [2022-02-11 00:31:27,389 INFO L276 IsEmpty]: Start isEmpty. Operand 896 states and 2678 transitions. [2022-02-11 00:31:27,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-02-11 00:31:27,390 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:31:27,390 INFO L515 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:31:27,406 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (262)] Forceful destruction successful, exit code 0 [2022-02-11 00:31:27,590 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable269,262 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:31:27,590 INFO L402 AbstractCegarLoop]: === Iteration 271 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:31:27,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:31:27,590 INFO L85 PathProgramCache]: Analyzing trace with hash -243101777, now seen corresponding path program 262 times [2022-02-11 00:31:27,590 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:31:27,590 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1783532988] [2022-02-11 00:31:27,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:31:27,590 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:31:27,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:31:27,736 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:31:27,736 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:31:27,736 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1783532988] [2022-02-11 00:31:27,736 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1783532988] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:31:27,736 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [193640348] [2022-02-11 00:31:27,736 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-11 00:31:27,736 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:31:27,736 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:31:27,737 INFO L229 MonitoredProcess]: Starting monitored process 263 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:31:27,737 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (263)] Waiting until timeout for monitored process [2022-02-11 00:31:27,802 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-11 00:31:27,802 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:31:27,803 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 33 conjunts are in the unsatisfiable core [2022-02-11 00:31:27,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:31:28,104 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 112 treesize of output 92 [2022-02-11 00:31:28,106 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 80 treesize of output 64 [2022-02-11 00:31:28,182 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:31:28,183 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:31:28,389 INFO L353 Elim1Store]: treesize reduction 10, result has 65.5 percent of original size [2022-02-11 00:31:28,389 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 56 treesize of output 58 [2022-02-11 00:31:28,392 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:31:28,398 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:31:28,399 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 40 treesize of output 42 [2022-02-11 00:31:28,531 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:31:28,532 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [193640348] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:31:28,532 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:31:28,532 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-02-11 00:31:28,532 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2015686546] [2022-02-11 00:31:28,532 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:31:28,532 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-11 00:31:28,532 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:31:28,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-11 00:31:28,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=539, Unknown=0, NotChecked=0, Total=650 [2022-02-11 00:31:28,532 INFO L87 Difference]: Start difference. First operand 896 states and 2678 transitions. Second operand has 26 states, 26 states have (on average 1.3846153846153846) internal successors, (36), 26 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) [2022-02-11 00:31:29,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:31:29,442 INFO L93 Difference]: Finished difference Result 1053 states and 2982 transitions. [2022-02-11 00:31:29,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-02-11 00:31:29,442 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.3846153846153846) internal successors, (36), 26 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 19 [2022-02-11 00:31:29,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:31:29,443 INFO L225 Difference]: With dead ends: 1053 [2022-02-11 00:31:29,444 INFO L226 Difference]: Without dead ends: 1049 [2022-02-11 00:31:29,444 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 395 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=275, Invalid=1365, Unknown=0, NotChecked=0, Total=1640 [2022-02-11 00:31:29,444 INFO L934 BasicCegarLoop]: 14 mSDtfsCounter, 114 mSDsluCounter, 368 mSDsCounter, 0 mSdLazyCounter, 646 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 233 SdHoareTripleChecker+Invalid, 713 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 646 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-11 00:31:29,444 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 233 Invalid, 713 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 646 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-11 00:31:29,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1049 states. [2022-02-11 00:31:29,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1049 to 902. [2022-02-11 00:31:29,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 902 states, 901 states have (on average 2.987791342952275) internal successors, (2692), 901 states have internal predecessors, (2692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:31:29,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 902 states to 902 states and 2692 transitions. [2022-02-11 00:31:29,455 INFO L78 Accepts]: Start accepts. Automaton has 902 states and 2692 transitions. Word has length 19 [2022-02-11 00:31:29,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:31:29,455 INFO L470 AbstractCegarLoop]: Abstraction has 902 states and 2692 transitions. [2022-02-11 00:31:29,455 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.3846153846153846) internal successors, (36), 26 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) [2022-02-11 00:31:29,455 INFO L276 IsEmpty]: Start isEmpty. Operand 902 states and 2692 transitions. [2022-02-11 00:31:29,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-02-11 00:31:29,456 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:31:29,456 INFO L515 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:31:29,472 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (263)] Forceful destruction successful, exit code 0 [2022-02-11 00:31:29,656 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 263 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable270 [2022-02-11 00:31:29,656 INFO L402 AbstractCegarLoop]: === Iteration 272 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:31:29,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:31:29,657 INFO L85 PathProgramCache]: Analyzing trace with hash -1098658505, now seen corresponding path program 263 times [2022-02-11 00:31:29,657 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:31:29,657 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1198381742] [2022-02-11 00:31:29,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:31:29,657 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:31:29,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:31:29,807 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:31:29,807 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:31:29,807 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1198381742] [2022-02-11 00:31:29,807 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1198381742] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:31:29,807 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [84136849] [2022-02-11 00:31:29,807 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-11 00:31:29,807 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:31:29,808 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:31:29,808 INFO L229 MonitoredProcess]: Starting monitored process 264 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:31:29,809 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (264)] Waiting until timeout for monitored process [2022-02-11 00:31:29,876 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-02-11 00:31:29,876 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:31:29,877 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-11 00:31:29,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:31:30,137 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 73 [2022-02-11 00:31:30,139 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 57 [2022-02-11 00:31:30,216 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:31:30,216 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:31:30,342 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:31:30,342 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 33 treesize of output 33 [2022-02-11 00:31:30,347 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:31:30,347 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 25 treesize of output 25 [2022-02-11 00:31:30,477 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:31:30,477 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [84136849] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:31:30,477 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:31:30,477 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-02-11 00:31:30,478 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1303580524] [2022-02-11 00:31:30,478 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:31:30,478 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-11 00:31:30,478 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:31:30,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-11 00:31:30,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=562, Unknown=0, NotChecked=0, Total=650 [2022-02-11 00:31:30,478 INFO L87 Difference]: Start difference. First operand 902 states and 2692 transitions. Second operand has 26 states, 26 states have (on average 1.4615384615384615) internal successors, (38), 26 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) [2022-02-11 00:31:31,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:31:31,232 INFO L93 Difference]: Finished difference Result 1040 states and 2941 transitions. [2022-02-11 00:31:31,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-02-11 00:31:31,233 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.4615384615384615) internal successors, (38), 26 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 19 [2022-02-11 00:31:31,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:31:31,234 INFO L225 Difference]: With dead ends: 1040 [2022-02-11 00:31:31,234 INFO L226 Difference]: Without dead ends: 1032 [2022-02-11 00:31:31,234 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 455 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=265, Invalid=1627, Unknown=0, NotChecked=0, Total=1892 [2022-02-11 00:31:31,235 INFO L934 BasicCegarLoop]: 13 mSDtfsCounter, 93 mSDsluCounter, 276 mSDsCounter, 0 mSdLazyCounter, 646 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 184 SdHoareTripleChecker+Invalid, 702 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 646 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-11 00:31:31,236 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [93 Valid, 184 Invalid, 702 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 646 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-11 00:31:31,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1032 states. [2022-02-11 00:31:31,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1032 to 904. [2022-02-11 00:31:31,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 904 states, 903 states have (on average 2.9789590254706533) internal successors, (2690), 903 states have internal predecessors, (2690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:31:31,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 904 states to 904 states and 2690 transitions. [2022-02-11 00:31:31,246 INFO L78 Accepts]: Start accepts. Automaton has 904 states and 2690 transitions. Word has length 19 [2022-02-11 00:31:31,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:31:31,246 INFO L470 AbstractCegarLoop]: Abstraction has 904 states and 2690 transitions. [2022-02-11 00:31:31,246 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.4615384615384615) internal successors, (38), 26 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) [2022-02-11 00:31:31,246 INFO L276 IsEmpty]: Start isEmpty. Operand 904 states and 2690 transitions. [2022-02-11 00:31:31,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-02-11 00:31:31,247 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:31:31,247 INFO L515 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:31:31,265 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (264)] Ended with exit code 0 [2022-02-11 00:31:31,448 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 264 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable271 [2022-02-11 00:31:31,448 INFO L402 AbstractCegarLoop]: === Iteration 273 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:31:31,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:31:31,448 INFO L85 PathProgramCache]: Analyzing trace with hash 1836192051, now seen corresponding path program 264 times [2022-02-11 00:31:31,448 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:31:31,448 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2075784424] [2022-02-11 00:31:31,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:31:31,449 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:31:31,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:31:31,622 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:31:31,622 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:31:31,622 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2075784424] [2022-02-11 00:31:31,622 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2075784424] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:31:31,622 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [757134068] [2022-02-11 00:31:31,622 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-11 00:31:31,622 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:31:31,623 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:31:31,624 INFO L229 MonitoredProcess]: Starting monitored process 265 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:31:31,624 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (265)] Waiting until timeout for monitored process [2022-02-11 00:31:31,693 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-02-11 00:31:31,694 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:31:31,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-11 00:31:31,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:31:31,963 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 98 treesize of output 82 [2022-02-11 00:31:31,965 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 82 treesize of output 66 [2022-02-11 00:31:32,040 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:31:32,040 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:31:32,134 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:31:32,134 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 65 treesize of output 61 [2022-02-11 00:31:32,140 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:31:32,140 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 53 treesize of output 49 [2022-02-11 00:31:32,327 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:31:32,328 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [757134068] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:31:32,328 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:31:32,328 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-02-11 00:31:32,328 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [296193337] [2022-02-11 00:31:32,328 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:31:32,328 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-11 00:31:32,328 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:31:32,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-11 00:31:32,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=553, Unknown=0, NotChecked=0, Total=650 [2022-02-11 00:31:32,328 INFO L87 Difference]: Start difference. First operand 904 states and 2690 transitions. Second operand has 26 states, 26 states have (on average 1.3846153846153846) internal successors, (36), 26 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) [2022-02-11 00:31:32,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:31:32,866 INFO L93 Difference]: Finished difference Result 969 states and 2790 transitions. [2022-02-11 00:31:32,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-02-11 00:31:32,867 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.3846153846153846) internal successors, (36), 26 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 19 [2022-02-11 00:31:32,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:31:32,868 INFO L225 Difference]: With dead ends: 969 [2022-02-11 00:31:32,868 INFO L226 Difference]: Without dead ends: 967 [2022-02-11 00:31:32,868 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 342 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=213, Invalid=1193, Unknown=0, NotChecked=0, Total=1406 [2022-02-11 00:31:32,868 INFO L934 BasicCegarLoop]: 19 mSDtfsCounter, 90 mSDsluCounter, 320 mSDsCounter, 0 mSdLazyCounter, 527 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 227 SdHoareTripleChecker+Invalid, 567 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 527 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-11 00:31:32,869 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 227 Invalid, 567 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 527 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-11 00:31:32,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 967 states. [2022-02-11 00:31:32,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 967 to 900. [2022-02-11 00:31:32,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 900 states, 899 states have (on average 2.9733036707452727) internal successors, (2673), 899 states have internal predecessors, (2673), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:31:32,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 900 states to 900 states and 2673 transitions. [2022-02-11 00:31:32,878 INFO L78 Accepts]: Start accepts. Automaton has 900 states and 2673 transitions. Word has length 19 [2022-02-11 00:31:32,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:31:32,878 INFO L470 AbstractCegarLoop]: Abstraction has 900 states and 2673 transitions. [2022-02-11 00:31:32,879 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.3846153846153846) internal successors, (36), 26 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) [2022-02-11 00:31:32,879 INFO L276 IsEmpty]: Start isEmpty. Operand 900 states and 2673 transitions. [2022-02-11 00:31:32,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-02-11 00:31:32,880 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:31:32,880 INFO L515 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:31:32,896 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (265)] Ended with exit code 0 [2022-02-11 00:31:33,080 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable272,265 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:31:33,080 INFO L402 AbstractCegarLoop]: === Iteration 274 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:31:33,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:31:33,080 INFO L85 PathProgramCache]: Analyzing trace with hash -336530329, now seen corresponding path program 265 times [2022-02-11 00:31:33,080 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:31:33,080 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [69400489] [2022-02-11 00:31:33,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:31:33,081 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:31:33,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:31:33,253 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:31:33,253 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:31:33,254 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [69400489] [2022-02-11 00:31:33,254 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [69400489] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:31:33,254 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [86016192] [2022-02-11 00:31:33,254 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-11 00:31:33,254 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:31:33,254 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:31:33,255 INFO L229 MonitoredProcess]: Starting monitored process 266 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:31:33,255 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (266)] Waiting until timeout for monitored process [2022-02-11 00:31:33,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:31:33,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-11 00:31:33,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:31:33,584 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 73 [2022-02-11 00:31:33,586 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 57 [2022-02-11 00:31:33,664 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:31:33,665 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:31:33,800 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:31:33,801 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 34 treesize of output 34 [2022-02-11 00:31:33,806 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:31:33,806 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 26 treesize of output 26 [2022-02-11 00:31:33,935 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:31:33,935 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [86016192] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:31:33,935 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:31:33,935 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-02-11 00:31:33,936 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [283981315] [2022-02-11 00:31:33,936 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:31:33,936 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-11 00:31:33,936 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:31:33,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-11 00:31:33,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=558, Unknown=0, NotChecked=0, Total=650 [2022-02-11 00:31:33,936 INFO L87 Difference]: Start difference. First operand 900 states and 2673 transitions. Second operand has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 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) [2022-02-11 00:31:34,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:31:34,277 INFO L93 Difference]: Finished difference Result 1002 states and 2873 transitions. [2022-02-11 00:31:34,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-02-11 00:31:34,277 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 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 19 [2022-02-11 00:31:34,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:31:34,279 INFO L225 Difference]: With dead ends: 1002 [2022-02-11 00:31:34,279 INFO L226 Difference]: Without dead ends: 998 [2022-02-11 00:31:34,279 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 217 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=142, Invalid=728, Unknown=0, NotChecked=0, Total=870 [2022-02-11 00:31:34,279 INFO L934 BasicCegarLoop]: 14 mSDtfsCounter, 118 mSDsluCounter, 267 mSDsCounter, 0 mSdLazyCounter, 568 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 164 SdHoareTripleChecker+Invalid, 615 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 568 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-11 00:31:34,279 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [118 Valid, 164 Invalid, 615 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 568 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-11 00:31:34,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 998 states. [2022-02-11 00:31:34,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 998 to 897. [2022-02-11 00:31:34,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 897 states, 896 states have (on average 2.970982142857143) internal successors, (2662), 896 states have internal predecessors, (2662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:31:34,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 897 states to 897 states and 2662 transitions. [2022-02-11 00:31:34,291 INFO L78 Accepts]: Start accepts. Automaton has 897 states and 2662 transitions. Word has length 19 [2022-02-11 00:31:34,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:31:34,291 INFO L470 AbstractCegarLoop]: Abstraction has 897 states and 2662 transitions. [2022-02-11 00:31:34,292 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 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) [2022-02-11 00:31:34,292 INFO L276 IsEmpty]: Start isEmpty. Operand 897 states and 2662 transitions. [2022-02-11 00:31:34,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-02-11 00:31:34,293 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:31:34,293 INFO L515 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:31:34,309 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (266)] Ended with exit code 0 [2022-02-11 00:31:34,493 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 266 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable273 [2022-02-11 00:31:34,493 INFO L402 AbstractCegarLoop]: === Iteration 275 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:31:34,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:31:34,494 INFO L85 PathProgramCache]: Analyzing trace with hash 1809640431, now seen corresponding path program 266 times [2022-02-11 00:31:34,494 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:31:34,494 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [374740329] [2022-02-11 00:31:34,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:31:34,494 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:31:34,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:31:34,703 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:31:34,703 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:31:34,703 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [374740329] [2022-02-11 00:31:34,703 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [374740329] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:31:34,703 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [516181110] [2022-02-11 00:31:34,703 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-11 00:31:34,704 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:31:34,704 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:31:34,705 INFO L229 MonitoredProcess]: Starting monitored process 267 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:31:34,705 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (267)] Waiting until timeout for monitored process [2022-02-11 00:31:34,793 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-11 00:31:34,793 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:31:34,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-11 00:31:34,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:31:35,057 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:31:35,058 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:31:35,200 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:31:35,200 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 34 treesize of output 34 [2022-02-11 00:31:35,205 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:31:35,205 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 26 treesize of output 26 [2022-02-11 00:31:35,342 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:31:35,343 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [516181110] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:31:35,343 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:31:35,343 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-02-11 00:31:35,343 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [479369440] [2022-02-11 00:31:35,343 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:31:35,343 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-11 00:31:35,343 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:31:35,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-11 00:31:35,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=559, Unknown=0, NotChecked=0, Total=650 [2022-02-11 00:31:35,343 INFO L87 Difference]: Start difference. First operand 897 states and 2662 transitions. Second operand has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 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) [2022-02-11 00:31:35,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:31:35,670 INFO L93 Difference]: Finished difference Result 964 states and 2796 transitions. [2022-02-11 00:31:35,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-02-11 00:31:35,670 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 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 19 [2022-02-11 00:31:35,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:31:35,671 INFO L225 Difference]: With dead ends: 964 [2022-02-11 00:31:35,671 INFO L226 Difference]: Without dead ends: 964 [2022-02-11 00:31:35,672 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=127, Invalid=685, Unknown=0, NotChecked=0, Total=812 [2022-02-11 00:31:35,672 INFO L934 BasicCegarLoop]: 11 mSDtfsCounter, 73 mSDsluCounter, 261 mSDsCounter, 0 mSdLazyCounter, 573 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 595 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 573 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-11 00:31:35,672 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [73 Valid, 148 Invalid, 595 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 573 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-11 00:31:35,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 964 states. [2022-02-11 00:31:35,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 964 to 897. [2022-02-11 00:31:35,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 897 states, 896 states have (on average 2.970982142857143) internal successors, (2662), 896 states have internal predecessors, (2662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:31:35,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 897 states to 897 states and 2662 transitions. [2022-02-11 00:31:35,681 INFO L78 Accepts]: Start accepts. Automaton has 897 states and 2662 transitions. Word has length 19 [2022-02-11 00:31:35,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:31:35,681 INFO L470 AbstractCegarLoop]: Abstraction has 897 states and 2662 transitions. [2022-02-11 00:31:35,682 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 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) [2022-02-11 00:31:35,682 INFO L276 IsEmpty]: Start isEmpty. Operand 897 states and 2662 transitions. [2022-02-11 00:31:35,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-02-11 00:31:35,682 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:31:35,683 INFO L515 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:31:35,699 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (267)] Ended with exit code 0 [2022-02-11 00:31:35,883 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable274,267 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:31:35,883 INFO L402 AbstractCegarLoop]: === Iteration 276 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:31:35,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:31:35,883 INFO L85 PathProgramCache]: Analyzing trace with hash -313876813, now seen corresponding path program 267 times [2022-02-11 00:31:35,883 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:31:35,883 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1426822987] [2022-02-11 00:31:35,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:31:35,883 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:31:35,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:31:36,010 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:31:36,010 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:31:36,010 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1426822987] [2022-02-11 00:31:36,010 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1426822987] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:31:36,010 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1277825760] [2022-02-11 00:31:36,010 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-11 00:31:36,010 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:31:36,010 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:31:36,011 INFO L229 MonitoredProcess]: Starting monitored process 268 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:31:36,012 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (268)] Waiting until timeout for monitored process [2022-02-11 00:31:36,079 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-02-11 00:31:36,079 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:31:36,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-11 00:31:36,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:31:36,422 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 49 [2022-02-11 00:31:36,423 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 37 [2022-02-11 00:31:36,441 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:31:36,442 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:31:36,543 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:31:36,544 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 73 treesize of output 67 [2022-02-11 00:31:36,550 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:31:36,550 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 57 treesize of output 51 [2022-02-11 00:31:36,703 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:31:36,703 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1277825760] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:31:36,703 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:31:36,703 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-02-11 00:31:36,703 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1823002667] [2022-02-11 00:31:36,704 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:31:36,704 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-02-11 00:31:36,704 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:31:36,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-02-11 00:31:36,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=458, Unknown=0, NotChecked=0, Total=552 [2022-02-11 00:31:36,704 INFO L87 Difference]: Start difference. First operand 897 states and 2662 transitions. Second operand has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:31:37,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:31:37,200 INFO L93 Difference]: Finished difference Result 971 states and 2786 transitions. [2022-02-11 00:31:37,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-02-11 00:31:37,200 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-02-11 00:31:37,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:31:37,201 INFO L225 Difference]: With dead ends: 971 [2022-02-11 00:31:37,201 INFO L226 Difference]: Without dead ends: 963 [2022-02-11 00:31:37,202 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 303 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=208, Invalid=982, Unknown=0, NotChecked=0, Total=1190 [2022-02-11 00:31:37,202 INFO L934 BasicCegarLoop]: 13 mSDtfsCounter, 71 mSDsluCounter, 286 mSDsCounter, 0 mSdLazyCounter, 482 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 183 SdHoareTripleChecker+Invalid, 519 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 482 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-11 00:31:37,202 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [71 Valid, 183 Invalid, 519 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 482 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-11 00:31:37,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 963 states. [2022-02-11 00:31:37,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 963 to 901. [2022-02-11 00:31:37,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 901 states, 900 states have (on average 2.973333333333333) internal successors, (2676), 900 states have internal predecessors, (2676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:31:37,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 901 states to 901 states and 2676 transitions. [2022-02-11 00:31:37,211 INFO L78 Accepts]: Start accepts. Automaton has 901 states and 2676 transitions. Word has length 19 [2022-02-11 00:31:37,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:31:37,212 INFO L470 AbstractCegarLoop]: Abstraction has 901 states and 2676 transitions. [2022-02-11 00:31:37,212 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:31:37,212 INFO L276 IsEmpty]: Start isEmpty. Operand 901 states and 2676 transitions. [2022-02-11 00:31:37,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-02-11 00:31:37,213 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:31:37,213 INFO L515 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:31:37,229 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (268)] Ended with exit code 0 [2022-02-11 00:31:37,413 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable275,268 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:31:37,413 INFO L402 AbstractCegarLoop]: === Iteration 277 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:31:37,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:31:37,413 INFO L85 PathProgramCache]: Analyzing trace with hash -706263889, now seen corresponding path program 268 times [2022-02-11 00:31:37,413 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:31:37,413 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [91389094] [2022-02-11 00:31:37,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:31:37,414 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:31:37,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:31:37,563 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:31:37,563 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:31:37,563 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [91389094] [2022-02-11 00:31:37,563 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [91389094] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:31:37,563 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1693205346] [2022-02-11 00:31:37,563 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-11 00:31:37,563 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:31:37,563 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:31:37,564 INFO L229 MonitoredProcess]: Starting monitored process 269 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:31:37,564 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (269)] Waiting until timeout for monitored process [2022-02-11 00:31:37,636 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-11 00:31:37,636 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:31:37,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-11 00:31:37,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:31:37,929 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:31:37,929 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:31:38,049 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:31:38,049 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 34 treesize of output 34 [2022-02-11 00:31:38,061 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:31:38,061 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 26 treesize of output 26 [2022-02-11 00:31:38,194 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:31:38,194 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1693205346] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:31:38,194 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:31:38,194 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-02-11 00:31:38,194 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1370243394] [2022-02-11 00:31:38,194 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:31:38,194 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-11 00:31:38,194 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:31:38,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-11 00:31:38,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=554, Unknown=0, NotChecked=0, Total=650 [2022-02-11 00:31:38,195 INFO L87 Difference]: Start difference. First operand 901 states and 2676 transitions. Second operand has 26 states, 26 states have (on average 1.4615384615384615) internal successors, (38), 26 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) [2022-02-11 00:31:38,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:31:38,644 INFO L93 Difference]: Finished difference Result 1008 states and 2891 transitions. [2022-02-11 00:31:38,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-02-11 00:31:38,645 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.4615384615384615) internal successors, (38), 26 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 19 [2022-02-11 00:31:38,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:31:38,646 INFO L225 Difference]: With dead ends: 1008 [2022-02-11 00:31:38,646 INFO L226 Difference]: Without dead ends: 1008 [2022-02-11 00:31:38,646 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 251 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=166, Invalid=890, Unknown=0, NotChecked=0, Total=1056 [2022-02-11 00:31:38,646 INFO L934 BasicCegarLoop]: 13 mSDtfsCounter, 70 mSDsluCounter, 276 mSDsCounter, 0 mSdLazyCounter, 612 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 168 SdHoareTripleChecker+Invalid, 636 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 612 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-11 00:31:38,646 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 168 Invalid, 636 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 612 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-11 00:31:38,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1008 states. [2022-02-11 00:31:38,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1008 to 900. [2022-02-11 00:31:38,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 900 states, 899 states have (on average 2.972191323692992) internal successors, (2672), 899 states have internal predecessors, (2672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:31:38,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 900 states to 900 states and 2672 transitions. [2022-02-11 00:31:38,661 INFO L78 Accepts]: Start accepts. Automaton has 900 states and 2672 transitions. Word has length 19 [2022-02-11 00:31:38,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:31:38,661 INFO L470 AbstractCegarLoop]: Abstraction has 900 states and 2672 transitions. [2022-02-11 00:31:38,661 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.4615384615384615) internal successors, (38), 26 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) [2022-02-11 00:31:38,661 INFO L276 IsEmpty]: Start isEmpty. Operand 900 states and 2672 transitions. [2022-02-11 00:31:38,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-02-11 00:31:38,662 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:31:38,662 INFO L515 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:31:38,678 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (269)] Ended with exit code 0 [2022-02-11 00:31:38,863 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 269 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable276 [2022-02-11 00:31:38,863 INFO L402 AbstractCegarLoop]: === Iteration 278 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:31:38,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:31:38,864 INFO L85 PathProgramCache]: Analyzing trace with hash 95250927, now seen corresponding path program 269 times [2022-02-11 00:31:38,864 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:31:38,864 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [679481235] [2022-02-11 00:31:38,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:31:38,864 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:31:38,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:31:39,029 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:31:39,029 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:31:39,029 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [679481235] [2022-02-11 00:31:39,030 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [679481235] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:31:39,030 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [35058532] [2022-02-11 00:31:39,030 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-11 00:31:39,030 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:31:39,030 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:31:39,031 INFO L229 MonitoredProcess]: Starting monitored process 270 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:31:39,031 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (270)] Waiting until timeout for monitored process [2022-02-11 00:31:39,098 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-02-11 00:31:39,098 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:31:39,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-11 00:31:39,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:31:39,362 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 98 treesize of output 82 [2022-02-11 00:31:39,364 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 82 treesize of output 66 [2022-02-11 00:31:39,439 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:31:39,439 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:31:39,530 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:31:39,530 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 65 treesize of output 61 [2022-02-11 00:31:39,537 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:31:39,537 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 53 treesize of output 49 [2022-02-11 00:31:39,734 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:31:39,734 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [35058532] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:31:39,734 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:31:39,734 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-02-11 00:31:39,734 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [906717366] [2022-02-11 00:31:39,734 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:31:39,735 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-11 00:31:39,735 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:31:39,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-11 00:31:39,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=548, Unknown=0, NotChecked=0, Total=650 [2022-02-11 00:31:39,735 INFO L87 Difference]: Start difference. First operand 900 states and 2672 transitions. Second operand has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 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) [2022-02-11 00:31:40,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:31:40,154 INFO L93 Difference]: Finished difference Result 952 states and 2767 transitions. [2022-02-11 00:31:40,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-02-11 00:31:40,154 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 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 19 [2022-02-11 00:31:40,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:31:40,155 INFO L225 Difference]: With dead ends: 952 [2022-02-11 00:31:40,155 INFO L226 Difference]: Without dead ends: 950 [2022-02-11 00:31:40,156 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 301 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=196, Invalid=994, Unknown=0, NotChecked=0, Total=1190 [2022-02-11 00:31:40,156 INFO L934 BasicCegarLoop]: 12 mSDtfsCounter, 50 mSDsluCounter, 212 mSDsCounter, 0 mSdLazyCounter, 415 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 447 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 415 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-11 00:31:40,156 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 144 Invalid, 447 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 415 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-11 00:31:40,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 950 states. [2022-02-11 00:31:40,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 950 to 900. [2022-02-11 00:31:40,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 900 states, 899 states have (on average 2.9699666295884315) internal successors, (2670), 899 states have internal predecessors, (2670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:31:40,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 900 states to 900 states and 2670 transitions. [2022-02-11 00:31:40,166 INFO L78 Accepts]: Start accepts. Automaton has 900 states and 2670 transitions. Word has length 19 [2022-02-11 00:31:40,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:31:40,166 INFO L470 AbstractCegarLoop]: Abstraction has 900 states and 2670 transitions. [2022-02-11 00:31:40,166 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 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) [2022-02-11 00:31:40,166 INFO L276 IsEmpty]: Start isEmpty. Operand 900 states and 2670 transitions. [2022-02-11 00:31:40,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-02-11 00:31:40,167 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:31:40,167 INFO L515 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:31:40,183 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (270)] Forceful destruction successful, exit code 0 [2022-02-11 00:31:40,367 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 270 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable277 [2022-02-11 00:31:40,367 INFO L402 AbstractCegarLoop]: === Iteration 279 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:31:40,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:31:40,367 INFO L85 PathProgramCache]: Analyzing trace with hash -2092932249, now seen corresponding path program 270 times [2022-02-11 00:31:40,368 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:31:40,368 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [115619915] [2022-02-11 00:31:40,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:31:40,368 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:31:40,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:31:40,512 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:31:40,512 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:31:40,512 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [115619915] [2022-02-11 00:31:40,512 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [115619915] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:31:40,512 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1330814080] [2022-02-11 00:31:40,512 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-11 00:31:40,512 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:31:40,513 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:31:40,513 INFO L229 MonitoredProcess]: Starting monitored process 271 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:31:40,514 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (271)] Waiting until timeout for monitored process [2022-02-11 00:31:40,587 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-02-11 00:31:40,588 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:31:40,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-11 00:31:40,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:31:40,851 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 87 treesize of output 71 [2022-02-11 00:31:40,853 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 55 [2022-02-11 00:31:40,939 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:31:40,939 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:31:41,057 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:31:41,057 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 33 treesize of output 33 [2022-02-11 00:31:41,062 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:31:41,062 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-02-11 00:31:41,187 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:31:41,187 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1330814080] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:31:41,187 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:31:41,187 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-02-11 00:31:41,188 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613712151] [2022-02-11 00:31:41,188 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:31:41,188 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-11 00:31:41,188 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:31:41,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-11 00:31:41,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=556, Unknown=0, NotChecked=0, Total=650 [2022-02-11 00:31:41,188 INFO L87 Difference]: Start difference. First operand 900 states and 2670 transitions. Second operand has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 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) [2022-02-11 00:31:41,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:31:41,807 INFO L93 Difference]: Finished difference Result 1011 states and 2912 transitions. [2022-02-11 00:31:41,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-02-11 00:31:41,807 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 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 19 [2022-02-11 00:31:41,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:31:41,808 INFO L225 Difference]: With dead ends: 1011 [2022-02-11 00:31:41,808 INFO L226 Difference]: Without dead ends: 1009 [2022-02-11 00:31:41,819 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 350 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=204, Invalid=1202, Unknown=0, NotChecked=0, Total=1406 [2022-02-11 00:31:41,819 INFO L934 BasicCegarLoop]: 9 mSDtfsCounter, 83 mSDsluCounter, 298 mSDsCounter, 0 mSdLazyCounter, 702 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 736 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 702 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-11 00:31:41,819 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [83 Valid, 162 Invalid, 736 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 702 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-11 00:31:41,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1009 states. [2022-02-11 00:31:41,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1009 to 897. [2022-02-11 00:31:41,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 897 states, 896 states have (on average 2.9676339285714284) internal successors, (2659), 896 states have internal predecessors, (2659), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:31:41,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 897 states to 897 states and 2659 transitions. [2022-02-11 00:31:41,829 INFO L78 Accepts]: Start accepts. Automaton has 897 states and 2659 transitions. Word has length 19 [2022-02-11 00:31:41,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:31:41,829 INFO L470 AbstractCegarLoop]: Abstraction has 897 states and 2659 transitions. [2022-02-11 00:31:41,829 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 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) [2022-02-11 00:31:41,829 INFO L276 IsEmpty]: Start isEmpty. Operand 897 states and 2659 transitions. [2022-02-11 00:31:41,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-02-11 00:31:41,830 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:31:41,830 INFO L515 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:31:41,846 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (271)] Ended with exit code 0 [2022-02-11 00:31:42,030 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 271 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable278 [2022-02-11 00:31:42,030 INFO L402 AbstractCegarLoop]: === Iteration 280 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:31:42,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:31:42,031 INFO L85 PathProgramCache]: Analyzing trace with hash 53238511, now seen corresponding path program 271 times [2022-02-11 00:31:42,031 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:31:42,031 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1453652021] [2022-02-11 00:31:42,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:31:42,031 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:31:42,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:31:42,184 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:31:42,185 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:31:42,185 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1453652021] [2022-02-11 00:31:42,185 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1453652021] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:31:42,185 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [90639601] [2022-02-11 00:31:42,185 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-11 00:31:42,185 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:31:42,185 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:31:42,186 INFO L229 MonitoredProcess]: Starting monitored process 272 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:31:42,186 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (272)] Waiting until timeout for monitored process [2022-02-11 00:31:42,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:31:42,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 33 conjunts are in the unsatisfiable core [2022-02-11 00:31:42,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:31:42,636 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:31:42,636 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:31:42,852 INFO L353 Elim1Store]: treesize reduction 14, result has 57.6 percent of original size [2022-02-11 00:31:42,853 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 64 treesize of output 62 [2022-02-11 00:31:42,856 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:31:42,863 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:31:42,863 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 44 treesize of output 46 [2022-02-11 00:31:43,010 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:31:43,010 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [90639601] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:31:43,010 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:31:43,010 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 27 [2022-02-11 00:31:43,010 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695765590] [2022-02-11 00:31:43,010 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:31:43,010 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-11 00:31:43,010 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:31:43,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-11 00:31:43,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=581, Unknown=0, NotChecked=0, Total=702 [2022-02-11 00:31:43,011 INFO L87 Difference]: Start difference. First operand 897 states and 2659 transitions. Second operand has 27 states, 27 states have (on average 1.4074074074074074) internal successors, (38), 27 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) [2022-02-11 00:31:43,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:31:43,925 INFO L93 Difference]: Finished difference Result 1051 states and 2999 transitions. [2022-02-11 00:31:43,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-02-11 00:31:43,926 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.4074074074074074) internal successors, (38), 27 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 19 [2022-02-11 00:31:43,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:31:43,927 INFO L225 Difference]: With dead ends: 1051 [2022-02-11 00:31:43,927 INFO L226 Difference]: Without dead ends: 1051 [2022-02-11 00:31:43,928 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 454 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=313, Invalid=1579, Unknown=0, NotChecked=0, Total=1892 [2022-02-11 00:31:43,928 INFO L934 BasicCegarLoop]: 13 mSDtfsCounter, 114 mSDsluCounter, 306 mSDsCounter, 0 mSdLazyCounter, 671 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 176 SdHoareTripleChecker+Invalid, 715 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 671 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-11 00:31:43,928 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 176 Invalid, 715 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 671 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-11 00:31:43,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1051 states. [2022-02-11 00:31:43,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1051 to 908. [2022-02-11 00:31:43,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 908 states, 907 states have (on average 2.968026460859978) internal successors, (2692), 907 states have internal predecessors, (2692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:31:43,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 908 states to 908 states and 2692 transitions. [2022-02-11 00:31:43,944 INFO L78 Accepts]: Start accepts. Automaton has 908 states and 2692 transitions. Word has length 19 [2022-02-11 00:31:43,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:31:43,944 INFO L470 AbstractCegarLoop]: Abstraction has 908 states and 2692 transitions. [2022-02-11 00:31:43,944 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.4074074074074074) internal successors, (38), 27 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) [2022-02-11 00:31:43,944 INFO L276 IsEmpty]: Start isEmpty. Operand 908 states and 2692 transitions. [2022-02-11 00:31:43,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-02-11 00:31:43,945 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:31:43,945 INFO L515 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:31:43,961 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (272)] Forceful destruction successful, exit code 0 [2022-02-11 00:31:44,145 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 272 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable279 [2022-02-11 00:31:44,146 INFO L402 AbstractCegarLoop]: === Iteration 281 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:31:44,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:31:44,146 INFO L85 PathProgramCache]: Analyzing trace with hash 137521975, now seen corresponding path program 272 times [2022-02-11 00:31:44,146 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:31:44,146 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1093917084] [2022-02-11 00:31:44,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:31:44,146 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:31:44,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:31:44,293 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:31:44,293 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:31:44,294 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1093917084] [2022-02-11 00:31:44,294 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1093917084] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:31:44,294 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [146568486] [2022-02-11 00:31:44,294 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-11 00:31:44,294 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:31:44,294 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:31:44,295 INFO L229 MonitoredProcess]: Starting monitored process 273 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:31:44,295 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (273)] Waiting until timeout for monitored process [2022-02-11 00:31:44,362 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-11 00:31:44,362 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:31:44,363 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-11 00:31:44,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:31:44,667 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 98 treesize of output 82 [2022-02-11 00:31:44,668 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 82 treesize of output 66 [2022-02-11 00:31:44,736 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:31:44,736 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:31:44,855 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:31:44,855 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 71 treesize of output 65 [2022-02-11 00:31:44,862 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:31:44,862 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 55 treesize of output 49 [2022-02-11 00:31:45,037 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:31:45,037 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [146568486] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:31:45,037 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:31:45,037 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-02-11 00:31:45,037 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [893048280] [2022-02-11 00:31:45,037 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:31:45,037 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-11 00:31:45,038 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:31:45,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-11 00:31:45,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=552, Unknown=0, NotChecked=0, Total=650 [2022-02-11 00:31:45,038 INFO L87 Difference]: Start difference. First operand 908 states and 2692 transitions. Second operand has 26 states, 26 states have (on average 1.4615384615384615) internal successors, (38), 26 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) [2022-02-11 00:31:45,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:31:45,397 INFO L93 Difference]: Finished difference Result 981 states and 2821 transitions. [2022-02-11 00:31:45,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-02-11 00:31:45,397 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.4615384615384615) internal successors, (38), 26 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 19 [2022-02-11 00:31:45,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:31:45,399 INFO L225 Difference]: With dead ends: 981 [2022-02-11 00:31:45,399 INFO L226 Difference]: Without dead ends: 981 [2022-02-11 00:31:45,399 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 228 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=144, Invalid=786, Unknown=0, NotChecked=0, Total=930 [2022-02-11 00:31:45,399 INFO L934 BasicCegarLoop]: 15 mSDtfsCounter, 135 mSDsluCounter, 256 mSDsCounter, 0 mSdLazyCounter, 494 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 161 SdHoareTripleChecker+Invalid, 525 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 494 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-11 00:31:45,399 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [135 Valid, 161 Invalid, 525 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 494 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-11 00:31:45,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 981 states. [2022-02-11 00:31:45,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 981 to 906. [2022-02-11 00:31:45,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 906 states, 905 states have (on average 2.9701657458563537) internal successors, (2688), 905 states have internal predecessors, (2688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:31:45,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 906 states to 906 states and 2688 transitions. [2022-02-11 00:31:45,410 INFO L78 Accepts]: Start accepts. Automaton has 906 states and 2688 transitions. Word has length 19 [2022-02-11 00:31:45,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:31:45,410 INFO L470 AbstractCegarLoop]: Abstraction has 906 states and 2688 transitions. [2022-02-11 00:31:45,410 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.4615384615384615) internal successors, (38), 26 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) [2022-02-11 00:31:45,410 INFO L276 IsEmpty]: Start isEmpty. Operand 906 states and 2688 transitions. [2022-02-11 00:31:45,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-02-11 00:31:45,411 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:31:45,411 INFO L515 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:31:45,427 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (273)] Forceful destruction successful, exit code 0 [2022-02-11 00:31:45,611 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 273 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable280 [2022-02-11 00:31:45,611 INFO L402 AbstractCegarLoop]: === Iteration 282 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:31:45,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:31:45,612 INFO L85 PathProgramCache]: Analyzing trace with hash -1207133969, now seen corresponding path program 273 times [2022-02-11 00:31:45,612 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:31:45,612 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2117140451] [2022-02-11 00:31:45,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:31:45,612 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:31:45,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:31:45,740 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:31:45,741 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:31:45,741 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2117140451] [2022-02-11 00:31:45,741 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2117140451] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:31:45,741 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1060361609] [2022-02-11 00:31:45,741 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-11 00:31:45,741 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:31:45,741 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:31:45,742 INFO L229 MonitoredProcess]: Starting monitored process 274 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:31:45,742 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (274)] Waiting until timeout for monitored process [2022-02-11 00:31:45,811 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-02-11 00:31:45,811 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:31:45,812 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-11 00:31:45,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:31:46,101 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 87 treesize of output 71 [2022-02-11 00:31:46,103 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 55 [2022-02-11 00:31:46,177 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:31:46,177 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:31:46,329 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:31:46,330 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 42 treesize of output 40 [2022-02-11 00:31:46,335 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:31:46,335 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 30 treesize of output 28 [2022-02-11 00:31:46,449 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:31:46,449 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1060361609] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:31:46,449 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:31:46,450 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-02-11 00:31:46,450 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1291724313] [2022-02-11 00:31:46,450 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:31:46,450 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-11 00:31:46,450 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:31:46,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-11 00:31:46,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=569, Unknown=0, NotChecked=0, Total=650 [2022-02-11 00:31:46,450 INFO L87 Difference]: Start difference. First operand 906 states and 2688 transitions. Second operand has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 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) [2022-02-11 00:31:47,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:31:47,393 INFO L93 Difference]: Finished difference Result 1027 states and 2943 transitions. [2022-02-11 00:31:47,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-02-11 00:31:47,393 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 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 19 [2022-02-11 00:31:47,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:31:47,395 INFO L225 Difference]: With dead ends: 1027 [2022-02-11 00:31:47,395 INFO L226 Difference]: Without dead ends: 1025 [2022-02-11 00:31:47,395 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 354 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=217, Invalid=1423, Unknown=0, NotChecked=0, Total=1640 [2022-02-11 00:31:47,395 INFO L934 BasicCegarLoop]: 11 mSDtfsCounter, 118 mSDsluCounter, 357 mSDsCounter, 0 mSdLazyCounter, 996 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 192 SdHoareTripleChecker+Invalid, 1040 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 996 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-11 00:31:47,395 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [118 Valid, 192 Invalid, 1040 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 996 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-11 00:31:47,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1025 states. [2022-02-11 00:31:47,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1025 to 914. [2022-02-11 00:31:47,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 914 states, 913 states have (on average 2.9704271631982477) internal successors, (2712), 913 states have internal predecessors, (2712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:31:47,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 914 states to 914 states and 2712 transitions. [2022-02-11 00:31:47,406 INFO L78 Accepts]: Start accepts. Automaton has 914 states and 2712 transitions. Word has length 19 [2022-02-11 00:31:47,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:31:47,406 INFO L470 AbstractCegarLoop]: Abstraction has 914 states and 2712 transitions. [2022-02-11 00:31:47,406 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 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) [2022-02-11 00:31:47,406 INFO L276 IsEmpty]: Start isEmpty. Operand 914 states and 2712 transitions. [2022-02-11 00:31:47,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-02-11 00:31:47,407 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:31:47,407 INFO L515 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:31:47,432 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (274)] Ended with exit code 0 [2022-02-11 00:31:47,608 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 274 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable281 [2022-02-11 00:31:47,608 INFO L402 AbstractCegarLoop]: === Iteration 283 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:31:47,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:31:47,608 INFO L85 PathProgramCache]: Analyzing trace with hash 939036791, now seen corresponding path program 274 times [2022-02-11 00:31:47,608 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:31:47,608 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [389220542] [2022-02-11 00:31:47,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:31:47,608 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:31:47,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:31:47,751 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:31:47,751 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:31:47,751 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [389220542] [2022-02-11 00:31:47,751 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [389220542] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:31:47,751 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [521100871] [2022-02-11 00:31:47,751 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-11 00:31:47,751 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:31:47,751 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:31:47,752 INFO L229 MonitoredProcess]: Starting monitored process 275 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:31:47,752 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (275)] Waiting until timeout for monitored process [2022-02-11 00:31:47,822 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-11 00:31:47,822 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:31:47,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-11 00:31:47,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:31:48,136 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:31:48,136 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:31:48,291 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:31:48,291 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 42 treesize of output 40 [2022-02-11 00:31:48,296 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:31:48,296 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 30 treesize of output 28 [2022-02-11 00:31:48,408 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:31:48,408 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [521100871] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:31:48,408 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:31:48,408 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-02-11 00:31:48,408 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [992153832] [2022-02-11 00:31:48,408 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:31:48,408 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-11 00:31:48,408 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:31:48,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-11 00:31:48,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=566, Unknown=0, NotChecked=0, Total=650 [2022-02-11 00:31:48,409 INFO L87 Difference]: Start difference. First operand 914 states and 2712 transitions. Second operand has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 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) [2022-02-11 00:31:48,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:31:48,967 INFO L93 Difference]: Finished difference Result 985 states and 2858 transitions. [2022-02-11 00:31:48,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-02-11 00:31:48,968 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 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 19 [2022-02-11 00:31:48,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:31:48,969 INFO L225 Difference]: With dead ends: 985 [2022-02-11 00:31:48,969 INFO L226 Difference]: Without dead ends: 985 [2022-02-11 00:31:48,969 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 332 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=184, Invalid=1222, Unknown=0, NotChecked=0, Total=1406 [2022-02-11 00:31:48,970 INFO L934 BasicCegarLoop]: 8 mSDtfsCounter, 64 mSDsluCounter, 206 mSDsCounter, 0 mSdLazyCounter, 524 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 541 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 524 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-11 00:31:48,970 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 104 Invalid, 541 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 524 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-11 00:31:48,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 985 states. [2022-02-11 00:31:48,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 985 to 912. [2022-02-11 00:31:48,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 912 states, 911 states have (on average 2.9703622392974753) internal successors, (2706), 911 states have internal predecessors, (2706), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:31:48,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 912 states to 912 states and 2706 transitions. [2022-02-11 00:31:48,980 INFO L78 Accepts]: Start accepts. Automaton has 912 states and 2706 transitions. Word has length 19 [2022-02-11 00:31:48,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:31:48,980 INFO L470 AbstractCegarLoop]: Abstraction has 912 states and 2706 transitions. [2022-02-11 00:31:48,980 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 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) [2022-02-11 00:31:48,980 INFO L276 IsEmpty]: Start isEmpty. Operand 912 states and 2706 transitions. [2022-02-11 00:31:48,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-02-11 00:31:48,981 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:31:48,981 INFO L515 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:31:48,997 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (275)] Forceful destruction successful, exit code 0 [2022-02-11 00:31:49,181 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable282,275 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:31:49,182 INFO L402 AbstractCegarLoop]: === Iteration 284 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:31:49,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:31:49,182 INFO L85 PathProgramCache]: Analyzing trace with hash -1249146385, now seen corresponding path program 275 times [2022-02-11 00:31:49,182 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:31:49,182 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [846040674] [2022-02-11 00:31:49,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:31:49,182 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:31:49,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:31:49,314 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:31:49,315 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:31:49,315 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [846040674] [2022-02-11 00:31:49,315 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [846040674] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:31:49,315 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [66636393] [2022-02-11 00:31:49,315 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-11 00:31:49,315 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:31:49,315 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:31:49,316 INFO L229 MonitoredProcess]: Starting monitored process 276 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:31:49,316 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (276)] Waiting until timeout for monitored process [2022-02-11 00:31:49,385 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-02-11 00:31:49,386 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:31:49,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-11 00:31:49,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:31:49,676 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:31:49,676 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:31:49,848 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:31:49,848 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 42 treesize of output 40 [2022-02-11 00:31:49,853 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:31:49,854 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 30 treesize of output 28 [2022-02-11 00:31:49,961 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:31:49,961 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [66636393] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:31:49,961 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:31:49,961 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-02-11 00:31:49,961 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1692169815] [2022-02-11 00:31:49,961 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:31:49,962 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-11 00:31:49,962 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:31:49,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-11 00:31:49,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=567, Unknown=0, NotChecked=0, Total=650 [2022-02-11 00:31:49,962 INFO L87 Difference]: Start difference. First operand 912 states and 2706 transitions. Second operand has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 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) [2022-02-11 00:31:50,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:31:50,291 INFO L93 Difference]: Finished difference Result 967 states and 2815 transitions. [2022-02-11 00:31:50,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-02-11 00:31:50,292 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 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 19 [2022-02-11 00:31:50,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:31:50,293 INFO L225 Difference]: With dead ends: 967 [2022-02-11 00:31:50,293 INFO L226 Difference]: Without dead ends: 967 [2022-02-11 00:31:50,293 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=88, Invalid=614, Unknown=0, NotChecked=0, Total=702 [2022-02-11 00:31:50,293 INFO L934 BasicCegarLoop]: 10 mSDtfsCounter, 43 mSDsluCounter, 327 mSDsCounter, 0 mSdLazyCounter, 738 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 744 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 738 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-11 00:31:50,293 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 156 Invalid, 744 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 738 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-11 00:31:50,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 967 states. [2022-02-11 00:31:50,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 967 to 904. [2022-02-11 00:31:50,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 904 states, 903 states have (on average 2.9689922480620154) internal successors, (2681), 903 states have internal predecessors, (2681), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:31:50,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 904 states to 904 states and 2681 transitions. [2022-02-11 00:31:50,303 INFO L78 Accepts]: Start accepts. Automaton has 904 states and 2681 transitions. Word has length 19 [2022-02-11 00:31:50,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:31:50,303 INFO L470 AbstractCegarLoop]: Abstraction has 904 states and 2681 transitions. [2022-02-11 00:31:50,303 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 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) [2022-02-11 00:31:50,303 INFO L276 IsEmpty]: Start isEmpty. Operand 904 states and 2681 transitions. [2022-02-11 00:31:50,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-02-11 00:31:50,304 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:31:50,304 INFO L515 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:31:50,320 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (276)] Forceful destruction successful, exit code 0 [2022-02-11 00:31:50,504 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable283,276 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:31:50,504 INFO L402 AbstractCegarLoop]: === Iteration 285 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:31:50,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:31:50,505 INFO L85 PathProgramCache]: Analyzing trace with hash -556329041, now seen corresponding path program 276 times [2022-02-11 00:31:50,505 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:31:50,505 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [851917147] [2022-02-11 00:31:50,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:31:50,505 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:31:50,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:31:50,643 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:31:50,643 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:31:50,643 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [851917147] [2022-02-11 00:31:50,643 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [851917147] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:31:50,643 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1573188529] [2022-02-11 00:31:50,643 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-11 00:31:50,643 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:31:50,643 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:31:50,644 INFO L229 MonitoredProcess]: Starting monitored process 277 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:31:50,645 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (277)] Waiting until timeout for monitored process [2022-02-11 00:31:50,713 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-02-11 00:31:50,714 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:31:50,714 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-11 00:31:50,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:31:51,001 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:31:51,001 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:31:51,161 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:31:51,161 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 42 treesize of output 40 [2022-02-11 00:31:51,166 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:31:51,166 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 30 treesize of output 28 [2022-02-11 00:31:51,278 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:31:51,278 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1573188529] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:31:51,278 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:31:51,278 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-02-11 00:31:51,278 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [338319723] [2022-02-11 00:31:51,278 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:31:51,278 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-11 00:31:51,278 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:31:51,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-11 00:31:51,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=568, Unknown=0, NotChecked=0, Total=650 [2022-02-11 00:31:51,279 INFO L87 Difference]: Start difference. First operand 904 states and 2681 transitions. Second operand has 26 states, 26 states have (on average 1.4615384615384615) internal successors, (38), 26 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) [2022-02-11 00:31:51,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:31:51,722 INFO L93 Difference]: Finished difference Result 995 states and 2875 transitions. [2022-02-11 00:31:51,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-02-11 00:31:51,722 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.4615384615384615) internal successors, (38), 26 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 19 [2022-02-11 00:31:51,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:31:51,723 INFO L225 Difference]: With dead ends: 995 [2022-02-11 00:31:51,723 INFO L226 Difference]: Without dead ends: 995 [2022-02-11 00:31:51,724 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=125, Invalid=805, Unknown=0, NotChecked=0, Total=930 [2022-02-11 00:31:51,724 INFO L934 BasicCegarLoop]: 14 mSDtfsCounter, 92 mSDsluCounter, 335 mSDsCounter, 0 mSdLazyCounter, 717 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 200 SdHoareTripleChecker+Invalid, 736 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 717 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-11 00:31:51,724 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [92 Valid, 200 Invalid, 736 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 717 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-11 00:31:51,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 995 states. [2022-02-11 00:31:51,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 995 to 909. [2022-02-11 00:31:51,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 909 states, 908 states have (on average 2.9724669603524227) internal successors, (2699), 908 states have internal predecessors, (2699), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:31:51,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 909 states to 909 states and 2699 transitions. [2022-02-11 00:31:51,734 INFO L78 Accepts]: Start accepts. Automaton has 909 states and 2699 transitions. Word has length 19 [2022-02-11 00:31:51,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:31:51,734 INFO L470 AbstractCegarLoop]: Abstraction has 909 states and 2699 transitions. [2022-02-11 00:31:51,734 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.4615384615384615) internal successors, (38), 26 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) [2022-02-11 00:31:51,734 INFO L276 IsEmpty]: Start isEmpty. Operand 909 states and 2699 transitions. [2022-02-11 00:31:51,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-02-11 00:31:51,735 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:31:51,735 INFO L515 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:31:51,751 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (277)] Ended with exit code 0 [2022-02-11 00:31:51,936 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable284,277 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:31:51,936 INFO L402 AbstractCegarLoop]: === Iteration 286 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:31:51,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:31:51,936 INFO L85 PathProgramCache]: Analyzing trace with hash 1550455079, now seen corresponding path program 277 times [2022-02-11 00:31:51,936 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:31:51,936 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [315455166] [2022-02-11 00:31:51,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:31:51,936 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:31:51,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:31:52,072 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:31:52,073 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:31:52,073 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [315455166] [2022-02-11 00:31:52,073 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [315455166] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:31:52,073 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1437485712] [2022-02-11 00:31:52,073 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-11 00:31:52,073 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:31:52,073 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:31:52,074 INFO L229 MonitoredProcess]: Starting monitored process 278 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:31:52,074 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (278)] Waiting until timeout for monitored process [2022-02-11 00:31:52,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:31:52,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-11 00:31:52,143 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:31:52,453 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:31:52,453 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:31:52,635 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:31:52,635 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 42 treesize of output 40 [2022-02-11 00:31:52,640 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:31:52,640 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 30 treesize of output 28 [2022-02-11 00:31:52,754 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:31:52,755 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1437485712] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:31:52,755 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:31:52,755 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-02-11 00:31:52,755 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1902377883] [2022-02-11 00:31:52,755 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:31:52,755 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-11 00:31:52,755 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:31:52,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-11 00:31:52,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=569, Unknown=0, NotChecked=0, Total=650 [2022-02-11 00:31:52,755 INFO L87 Difference]: Start difference. First operand 909 states and 2699 transitions. Second operand has 26 states, 26 states have (on average 1.4615384615384615) internal successors, (38), 26 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) [2022-02-11 00:31:53,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:31:53,429 INFO L93 Difference]: Finished difference Result 1023 states and 2945 transitions. [2022-02-11 00:31:53,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-02-11 00:31:53,430 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.4615384615384615) internal successors, (38), 26 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 19 [2022-02-11 00:31:53,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:31:53,431 INFO L225 Difference]: With dead ends: 1023 [2022-02-11 00:31:53,431 INFO L226 Difference]: Without dead ends: 1023 [2022-02-11 00:31:53,431 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 306 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=201, Invalid=1359, Unknown=0, NotChecked=0, Total=1560 [2022-02-11 00:31:53,431 INFO L934 BasicCegarLoop]: 9 mSDtfsCounter, 41 mSDsluCounter, 229 mSDsCounter, 0 mSdLazyCounter, 616 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 640 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 616 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-11 00:31:53,432 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 141 Invalid, 640 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 616 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-11 00:31:53,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1023 states. [2022-02-11 00:31:53,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1023 to 904. [2022-02-11 00:31:53,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 904 states, 903 states have (on average 2.967884828349945) internal successors, (2680), 903 states have internal predecessors, (2680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:31:53,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 904 states to 904 states and 2680 transitions. [2022-02-11 00:31:53,442 INFO L78 Accepts]: Start accepts. Automaton has 904 states and 2680 transitions. Word has length 19 [2022-02-11 00:31:53,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:31:53,442 INFO L470 AbstractCegarLoop]: Abstraction has 904 states and 2680 transitions. [2022-02-11 00:31:53,442 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.4615384615384615) internal successors, (38), 26 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) [2022-02-11 00:31:53,442 INFO L276 IsEmpty]: Start isEmpty. Operand 904 states and 2680 transitions. [2022-02-11 00:31:53,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-02-11 00:31:53,443 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:31:53,443 INFO L515 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:31:53,459 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (278)] Ended with exit code 0 [2022-02-11 00:31:53,643 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable285,278 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:31:53,643 INFO L402 AbstractCegarLoop]: === Iteration 287 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:31:53,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:31:53,644 INFO L85 PathProgramCache]: Analyzing trace with hash -598341457, now seen corresponding path program 278 times [2022-02-11 00:31:53,644 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:31:53,644 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1260693247] [2022-02-11 00:31:53,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:31:53,644 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:31:53,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:31:53,776 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:31:53,776 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:31:53,776 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1260693247] [2022-02-11 00:31:53,776 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1260693247] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:31:53,776 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1885813644] [2022-02-11 00:31:53,776 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-11 00:31:53,777 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:31:53,777 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:31:53,777 INFO L229 MonitoredProcess]: Starting monitored process 279 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:31:53,778 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (279)] Waiting until timeout for monitored process [2022-02-11 00:31:53,845 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-11 00:31:53,845 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:31:53,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 33 conjunts are in the unsatisfiable core [2022-02-11 00:31:53,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:31:54,197 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 105 treesize of output 85 [2022-02-11 00:31:54,200 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 57 [2022-02-11 00:31:54,273 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:31:54,273 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:31:54,533 INFO L353 Elim1Store]: treesize reduction 12, result has 63.6 percent of original size [2022-02-11 00:31:54,533 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 64 treesize of output 64 [2022-02-11 00:31:54,535 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:31:54,543 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:31:54,543 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 44 treesize of output 46 [2022-02-11 00:31:54,689 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:31:54,689 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1885813644] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:31:54,690 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:31:54,690 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 27 [2022-02-11 00:31:54,690 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447256189] [2022-02-11 00:31:54,690 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:31:54,690 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-11 00:31:54,690 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:31:54,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-11 00:31:54,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=612, Unknown=0, NotChecked=0, Total=702 [2022-02-11 00:31:54,690 INFO L87 Difference]: Start difference. First operand 904 states and 2680 transitions. Second operand has 27 states, 27 states have (on average 1.4444444444444444) internal successors, (39), 27 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) [2022-02-11 00:31:55,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:31:55,795 INFO L93 Difference]: Finished difference Result 1034 states and 2933 transitions. [2022-02-11 00:31:55,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-02-11 00:31:55,796 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.4444444444444444) internal successors, (39), 27 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 19 [2022-02-11 00:31:55,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:31:55,797 INFO L225 Difference]: With dead ends: 1034 [2022-02-11 00:31:55,797 INFO L226 Difference]: Without dead ends: 1031 [2022-02-11 00:31:55,797 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 428 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=319, Invalid=1843, Unknown=0, NotChecked=0, Total=2162 [2022-02-11 00:31:55,798 INFO L934 BasicCegarLoop]: 15 mSDtfsCounter, 125 mSDsluCounter, 287 mSDsCounter, 0 mSdLazyCounter, 749 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 200 SdHoareTripleChecker+Invalid, 818 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 749 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-11 00:31:55,798 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [125 Valid, 200 Invalid, 818 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 749 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-11 00:31:55,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1031 states. [2022-02-11 00:31:55,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1031 to 907. [2022-02-11 00:31:55,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 907 states, 906 states have (on average 2.964679911699779) internal successors, (2686), 906 states have internal predecessors, (2686), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:31:55,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 907 states to 907 states and 2686 transitions. [2022-02-11 00:31:55,808 INFO L78 Accepts]: Start accepts. Automaton has 907 states and 2686 transitions. Word has length 19 [2022-02-11 00:31:55,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:31:55,808 INFO L470 AbstractCegarLoop]: Abstraction has 907 states and 2686 transitions. [2022-02-11 00:31:55,808 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.4444444444444444) internal successors, (39), 27 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) [2022-02-11 00:31:55,808 INFO L276 IsEmpty]: Start isEmpty. Operand 907 states and 2686 transitions. [2022-02-11 00:31:55,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-02-11 00:31:55,809 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:31:55,809 INFO L515 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:31:55,826 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (279)] Forceful destruction successful, exit code 0 [2022-02-11 00:31:56,010 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 279 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable286 [2022-02-11 00:31:56,010 INFO L402 AbstractCegarLoop]: === Iteration 288 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:31:56,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:31:56,010 INFO L85 PathProgramCache]: Analyzing trace with hash -1958458197, now seen corresponding path program 279 times [2022-02-11 00:31:56,010 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:31:56,010 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [348727646] [2022-02-11 00:31:56,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:31:56,010 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:31:56,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:31:56,147 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:31:56,147 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:31:56,147 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [348727646] [2022-02-11 00:31:56,147 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [348727646] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:31:56,147 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [424529303] [2022-02-11 00:31:56,147 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-11 00:31:56,147 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:31:56,147 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:31:56,148 INFO L229 MonitoredProcess]: Starting monitored process 280 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:31:56,148 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (280)] Waiting until timeout for monitored process [2022-02-11 00:31:56,218 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-02-11 00:31:56,218 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:31:56,219 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-11 00:31:56,220 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:31:56,516 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 96 treesize of output 80 [2022-02-11 00:31:56,518 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 80 treesize of output 64 [2022-02-11 00:31:56,584 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:31:56,584 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:31:56,702 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:31:56,702 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 73 treesize of output 67 [2022-02-11 00:31:56,709 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:31:56,709 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 57 treesize of output 51 [2022-02-11 00:31:56,886 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:31:56,886 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [424529303] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:31:56,886 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:31:56,886 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-02-11 00:31:56,886 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446005460] [2022-02-11 00:31:56,886 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:31:56,886 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-11 00:31:56,886 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:31:56,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-11 00:31:56,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=555, Unknown=0, NotChecked=0, Total=650 [2022-02-11 00:31:56,887 INFO L87 Difference]: Start difference. First operand 907 states and 2686 transitions. Second operand has 26 states, 26 states have (on average 1.3846153846153846) internal successors, (36), 26 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) [2022-02-11 00:31:57,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:31:57,396 INFO L93 Difference]: Finished difference Result 978 states and 2814 transitions. [2022-02-11 00:31:57,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-02-11 00:31:57,397 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.3846153846153846) internal successors, (36), 26 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 19 [2022-02-11 00:31:57,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:31:57,398 INFO L225 Difference]: With dead ends: 978 [2022-02-11 00:31:57,398 INFO L226 Difference]: Without dead ends: 976 [2022-02-11 00:31:57,398 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 237 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=207, Invalid=1053, Unknown=0, NotChecked=0, Total=1260 [2022-02-11 00:31:57,398 INFO L934 BasicCegarLoop]: 14 mSDtfsCounter, 89 mSDsluCounter, 274 mSDsCounter, 0 mSdLazyCounter, 570 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 181 SdHoareTripleChecker+Invalid, 611 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 570 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-11 00:31:57,398 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [89 Valid, 181 Invalid, 611 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 570 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-11 00:31:57,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 976 states. [2022-02-11 00:31:57,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 976 to 904. [2022-02-11 00:31:57,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 904 states, 903 states have (on average 2.9612403100775193) internal successors, (2674), 903 states have internal predecessors, (2674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:31:57,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 904 states to 904 states and 2674 transitions. [2022-02-11 00:31:57,408 INFO L78 Accepts]: Start accepts. Automaton has 904 states and 2674 transitions. Word has length 19 [2022-02-11 00:31:57,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:31:57,408 INFO L470 AbstractCegarLoop]: Abstraction has 904 states and 2674 transitions. [2022-02-11 00:31:57,408 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.3846153846153846) internal successors, (36), 26 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) [2022-02-11 00:31:57,408 INFO L276 IsEmpty]: Start isEmpty. Operand 904 states and 2674 transitions. [2022-02-11 00:31:57,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-02-11 00:31:57,409 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:31:57,409 INFO L515 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:31:57,425 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (280)] Ended with exit code 0 [2022-02-11 00:31:57,610 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 280 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable287 [2022-02-11 00:31:57,610 INFO L402 AbstractCegarLoop]: === Iteration 289 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:31:57,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:31:57,610 INFO L85 PathProgramCache]: Analyzing trace with hash 675014831, now seen corresponding path program 280 times [2022-02-11 00:31:57,610 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:31:57,610 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1463432547] [2022-02-11 00:31:57,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:31:57,610 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:31:57,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:31:57,734 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:31:57,734 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:31:57,734 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1463432547] [2022-02-11 00:31:57,734 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1463432547] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:31:57,734 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2085796563] [2022-02-11 00:31:57,734 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-11 00:31:57,734 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:31:57,734 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:31:57,735 INFO L229 MonitoredProcess]: Starting monitored process 281 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:31:57,735 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (281)] Waiting until timeout for monitored process [2022-02-11 00:31:57,802 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-11 00:31:57,802 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:31:57,802 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 33 conjunts are in the unsatisfiable core [2022-02-11 00:31:57,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:31:58,115 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 96 treesize of output 80 [2022-02-11 00:31:58,117 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 80 treesize of output 64 [2022-02-11 00:31:58,184 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:31:58,184 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:31:58,307 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:31:58,307 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 71 treesize of output 65 [2022-02-11 00:31:58,314 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:31:58,314 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 55 treesize of output 49 [2022-02-11 00:31:58,480 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:31:58,480 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2085796563] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:31:58,480 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:31:58,480 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-02-11 00:31:58,480 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1565273824] [2022-02-11 00:31:58,480 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:31:58,481 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-11 00:31:58,481 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:31:58,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-11 00:31:58,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=547, Unknown=0, NotChecked=0, Total=650 [2022-02-11 00:31:58,481 INFO L87 Difference]: Start difference. First operand 904 states and 2674 transitions. Second operand has 26 states, 26 states have (on average 1.4615384615384615) internal successors, (38), 26 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) [2022-02-11 00:31:58,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:31:58,830 INFO L93 Difference]: Finished difference Result 967 states and 2781 transitions. [2022-02-11 00:31:58,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-02-11 00:31:58,831 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.4615384615384615) internal successors, (38), 26 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 19 [2022-02-11 00:31:58,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:31:58,832 INFO L225 Difference]: With dead ends: 967 [2022-02-11 00:31:58,832 INFO L226 Difference]: Without dead ends: 964 [2022-02-11 00:31:58,832 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=165, Invalid=827, Unknown=0, NotChecked=0, Total=992 [2022-02-11 00:31:58,833 INFO L934 BasicCegarLoop]: 14 mSDtfsCounter, 72 mSDsluCounter, 231 mSDsCounter, 0 mSdLazyCounter, 400 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 429 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 400 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-11 00:31:58,833 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 138 Invalid, 429 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 400 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-11 00:31:58,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 964 states. [2022-02-11 00:31:58,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 964 to 903. [2022-02-11 00:31:58,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 903 states, 902 states have (on average 2.958980044345898) internal successors, (2669), 902 states have internal predecessors, (2669), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:31:58,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 903 states to 903 states and 2669 transitions. [2022-02-11 00:31:58,848 INFO L78 Accepts]: Start accepts. Automaton has 903 states and 2669 transitions. Word has length 19 [2022-02-11 00:31:58,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:31:58,848 INFO L470 AbstractCegarLoop]: Abstraction has 903 states and 2669 transitions. [2022-02-11 00:31:58,848 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.4615384615384615) internal successors, (38), 26 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) [2022-02-11 00:31:58,848 INFO L276 IsEmpty]: Start isEmpty. Operand 903 states and 2669 transitions. [2022-02-11 00:31:58,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-02-11 00:31:58,849 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:31:58,849 INFO L515 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:31:58,865 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (281)] Ended with exit code 0 [2022-02-11 00:31:59,049 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable288,281 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:31:59,049 INFO L402 AbstractCegarLoop]: === Iteration 290 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:31:59,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:31:59,050 INFO L85 PathProgramCache]: Analyzing trace with hash 679851439, now seen corresponding path program 281 times [2022-02-11 00:31:59,050 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:31:59,050 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1776681730] [2022-02-11 00:31:59,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:31:59,050 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:31:59,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:31:59,212 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:31:59,212 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:31:59,212 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1776681730] [2022-02-11 00:31:59,212 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1776681730] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:31:59,212 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1102827353] [2022-02-11 00:31:59,212 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-11 00:31:59,212 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:31:59,213 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:31:59,213 INFO L229 MonitoredProcess]: Starting monitored process 282 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:31:59,214 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (282)] Waiting until timeout for monitored process [2022-02-11 00:31:59,282 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-02-11 00:31:59,283 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:31:59,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-11 00:31:59,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:31:59,566 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:31:59,566 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:31:59,707 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:31:59,708 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 34 treesize of output 34 [2022-02-11 00:31:59,712 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:31:59,713 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 26 treesize of output 26 [2022-02-11 00:31:59,849 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:31:59,849 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1102827353] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:31:59,849 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:31:59,850 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-02-11 00:31:59,850 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1119510154] [2022-02-11 00:31:59,850 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:31:59,850 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-11 00:31:59,850 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:31:59,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-11 00:31:59,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=563, Unknown=0, NotChecked=0, Total=650 [2022-02-11 00:31:59,850 INFO L87 Difference]: Start difference. First operand 903 states and 2669 transitions. Second operand has 26 states, 26 states have (on average 1.4615384615384615) internal successors, (38), 26 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) [2022-02-11 00:32:00,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:32:00,277 INFO L93 Difference]: Finished difference Result 985 states and 2835 transitions. [2022-02-11 00:32:00,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-02-11 00:32:00,277 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.4615384615384615) internal successors, (38), 26 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 19 [2022-02-11 00:32:00,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:32:00,279 INFO L225 Difference]: With dead ends: 985 [2022-02-11 00:32:00,279 INFO L226 Difference]: Without dead ends: 985 [2022-02-11 00:32:00,279 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=141, Invalid=789, Unknown=0, NotChecked=0, Total=930 [2022-02-11 00:32:00,279 INFO L934 BasicCegarLoop]: 13 mSDtfsCounter, 66 mSDsluCounter, 313 mSDsCounter, 0 mSdLazyCounter, 698 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 188 SdHoareTripleChecker+Invalid, 726 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 698 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-11 00:32:00,279 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 188 Invalid, 726 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 698 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-11 00:32:00,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 985 states. [2022-02-11 00:32:00,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 985 to 904. [2022-02-11 00:32:00,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 904 states, 903 states have (on average 2.9601328903654487) internal successors, (2673), 903 states have internal predecessors, (2673), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:32:00,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 904 states to 904 states and 2673 transitions. [2022-02-11 00:32:00,290 INFO L78 Accepts]: Start accepts. Automaton has 904 states and 2673 transitions. Word has length 19 [2022-02-11 00:32:00,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:32:00,290 INFO L470 AbstractCegarLoop]: Abstraction has 904 states and 2673 transitions. [2022-02-11 00:32:00,290 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.4615384615384615) internal successors, (38), 26 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) [2022-02-11 00:32:00,290 INFO L276 IsEmpty]: Start isEmpty. Operand 904 states and 2673 transitions. [2022-02-11 00:32:00,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-02-11 00:32:00,291 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:32:00,291 INFO L515 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:32:00,307 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (282)] Ended with exit code 0 [2022-02-11 00:32:00,491 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 282 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable289 [2022-02-11 00:32:00,491 INFO L402 AbstractCegarLoop]: === Iteration 291 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:32:00,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:32:00,491 INFO L85 PathProgramCache]: Analyzing trace with hash -1468945097, now seen corresponding path program 282 times [2022-02-11 00:32:00,492 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:32:00,492 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [214126144] [2022-02-11 00:32:00,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:32:00,492 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:32:00,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:32:00,643 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:32:00,643 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:32:00,643 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [214126144] [2022-02-11 00:32:00,643 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [214126144] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:32:00,643 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1089662746] [2022-02-11 00:32:00,643 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-11 00:32:00,643 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:32:00,643 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:32:00,644 INFO L229 MonitoredProcess]: Starting monitored process 283 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:32:00,645 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (283)] Waiting until timeout for monitored process [2022-02-11 00:32:00,713 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-02-11 00:32:00,713 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:32:00,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-11 00:32:00,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:32:00,972 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 87 treesize of output 71 [2022-02-11 00:32:00,974 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 55 [2022-02-11 00:32:01,052 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:32:01,052 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:32:01,174 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:32:01,174 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 33 treesize of output 33 [2022-02-11 00:32:01,199 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:32:01,200 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 25 treesize of output 25 [2022-02-11 00:32:01,358 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:32:01,358 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1089662746] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:32:01,358 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:32:01,359 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-02-11 00:32:01,359 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [959104368] [2022-02-11 00:32:01,359 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:32:01,359 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-11 00:32:01,359 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:32:01,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-11 00:32:01,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=565, Unknown=0, NotChecked=0, Total=650 [2022-02-11 00:32:01,359 INFO L87 Difference]: Start difference. First operand 904 states and 2673 transitions. Second operand has 26 states, 26 states have (on average 1.4615384615384615) internal successors, (38), 26 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) [2022-02-11 00:32:01,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:32:01,749 INFO L93 Difference]: Finished difference Result 1016 states and 2886 transitions. [2022-02-11 00:32:01,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-02-11 00:32:01,749 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.4615384615384615) internal successors, (38), 26 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 19 [2022-02-11 00:32:01,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:32:01,751 INFO L225 Difference]: With dead ends: 1016 [2022-02-11 00:32:01,751 INFO L226 Difference]: Without dead ends: 1013 [2022-02-11 00:32:01,751 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=145, Invalid=785, Unknown=0, NotChecked=0, Total=930 [2022-02-11 00:32:01,751 INFO L934 BasicCegarLoop]: 17 mSDtfsCounter, 129 mSDsluCounter, 291 mSDsCounter, 0 mSdLazyCounter, 593 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 197 SdHoareTripleChecker+Invalid, 631 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 593 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-11 00:32:01,751 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [129 Valid, 197 Invalid, 631 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 593 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-11 00:32:01,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1013 states. [2022-02-11 00:32:01,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1013 to 907. [2022-02-11 00:32:01,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 907 states, 906 states have (on average 2.9602649006622515) internal successors, (2682), 906 states have internal predecessors, (2682), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:32:01,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 907 states to 907 states and 2682 transitions. [2022-02-11 00:32:01,762 INFO L78 Accepts]: Start accepts. Automaton has 907 states and 2682 transitions. Word has length 19 [2022-02-11 00:32:01,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:32:01,762 INFO L470 AbstractCegarLoop]: Abstraction has 907 states and 2682 transitions. [2022-02-11 00:32:01,762 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.4615384615384615) internal successors, (38), 26 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) [2022-02-11 00:32:01,762 INFO L276 IsEmpty]: Start isEmpty. Operand 907 states and 2682 transitions. [2022-02-11 00:32:01,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-02-11 00:32:01,763 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:32:01,763 INFO L515 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:32:01,784 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (283)] Forceful destruction successful, exit code 0 [2022-02-11 00:32:01,963 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 283 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable290 [2022-02-11 00:32:01,964 INFO L402 AbstractCegarLoop]: === Iteration 292 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:32:01,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:32:01,964 INFO L85 PathProgramCache]: Analyzing trace with hash 1481366255, now seen corresponding path program 283 times [2022-02-11 00:32:01,964 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:32:01,964 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1798351530] [2022-02-11 00:32:01,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:32:01,964 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:32:01,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:32:02,135 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:32:02,136 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:32:02,136 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1798351530] [2022-02-11 00:32:02,136 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1798351530] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:32:02,136 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [961127644] [2022-02-11 00:32:02,136 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-11 00:32:02,136 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:32:02,136 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:32:02,137 INFO L229 MonitoredProcess]: Starting monitored process 284 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:32:02,141 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (284)] Waiting until timeout for monitored process [2022-02-11 00:32:02,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:32:02,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 33 conjunts are in the unsatisfiable core [2022-02-11 00:32:02,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:32:02,571 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 112 treesize of output 92 [2022-02-11 00:32:02,573 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 80 treesize of output 64 [2022-02-11 00:32:02,651 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:32:02,651 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:32:02,951 INFO L353 Elim1Store]: treesize reduction 14, result has 57.6 percent of original size [2022-02-11 00:32:02,952 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 63 treesize of output 61 [2022-02-11 00:32:02,955 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:32:02,962 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:32:02,962 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 43 treesize of output 45 [2022-02-11 00:32:03,066 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:32:03,067 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [961127644] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:32:03,067 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:32:03,067 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 27 [2022-02-11 00:32:03,067 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417600374] [2022-02-11 00:32:03,067 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:32:03,067 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-11 00:32:03,067 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:32:03,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-11 00:32:03,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=599, Unknown=0, NotChecked=0, Total=702 [2022-02-11 00:32:03,067 INFO L87 Difference]: Start difference. First operand 907 states and 2682 transitions. Second operand has 27 states, 27 states have (on average 1.4074074074074074) internal successors, (38), 27 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) [2022-02-11 00:32:04,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:32:04,548 INFO L93 Difference]: Finished difference Result 1094 states and 3091 transitions. [2022-02-11 00:32:04,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-02-11 00:32:04,548 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.4074074074074074) internal successors, (38), 27 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 19 [2022-02-11 00:32:04,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:32:04,550 INFO L225 Difference]: With dead ends: 1094 [2022-02-11 00:32:04,550 INFO L226 Difference]: Without dead ends: 1094 [2022-02-11 00:32:04,550 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 549 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=424, Invalid=2026, Unknown=0, NotChecked=0, Total=2450 [2022-02-11 00:32:04,550 INFO L934 BasicCegarLoop]: 16 mSDtfsCounter, 235 mSDsluCounter, 340 mSDsCounter, 0 mSdLazyCounter, 825 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 235 SdHoareTripleChecker+Valid, 200 SdHoareTripleChecker+Invalid, 902 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 825 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-11 00:32:04,550 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [235 Valid, 200 Invalid, 902 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 825 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-11 00:32:04,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1094 states. [2022-02-11 00:32:04,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1094 to 948. [2022-02-11 00:32:04,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 948 states, 947 states have (on average 2.976768743400211) internal successors, (2819), 947 states have internal predecessors, (2819), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:32:04,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 948 states to 948 states and 2819 transitions. [2022-02-11 00:32:04,561 INFO L78 Accepts]: Start accepts. Automaton has 948 states and 2819 transitions. Word has length 19 [2022-02-11 00:32:04,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:32:04,561 INFO L470 AbstractCegarLoop]: Abstraction has 948 states and 2819 transitions. [2022-02-11 00:32:04,561 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.4074074074074074) internal successors, (38), 27 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) [2022-02-11 00:32:04,561 INFO L276 IsEmpty]: Start isEmpty. Operand 948 states and 2819 transitions. [2022-02-11 00:32:04,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-02-11 00:32:04,562 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:32:04,562 INFO L515 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:32:04,578 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (284)] Ended with exit code 0 [2022-02-11 00:32:04,762 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable291,284 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:32:04,763 INFO L402 AbstractCegarLoop]: === Iteration 293 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:32:04,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:32:04,763 INFO L85 PathProgramCache]: Analyzing trace with hash -706816921, now seen corresponding path program 284 times [2022-02-11 00:32:04,763 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:32:04,763 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1390348972] [2022-02-11 00:32:04,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:32:04,763 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:32:04,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:32:04,919 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:32:04,920 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:32:04,920 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1390348972] [2022-02-11 00:32:04,920 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1390348972] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:32:04,920 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [687909962] [2022-02-11 00:32:04,920 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-11 00:32:04,920 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:32:04,920 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:32:04,921 INFO L229 MonitoredProcess]: Starting monitored process 285 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:32:04,921 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (285)] Waiting until timeout for monitored process [2022-02-11 00:32:04,990 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-11 00:32:04,990 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:32:04,991 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-11 00:32:04,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:32:05,252 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 87 treesize of output 71 [2022-02-11 00:32:05,254 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 55 [2022-02-11 00:32:05,324 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:32:05,325 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:32:05,476 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:32:05,476 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 34 treesize of output 34 [2022-02-11 00:32:05,481 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:32:05,481 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 26 treesize of output 26 [2022-02-11 00:32:05,629 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:32:05,629 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [687909962] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:32:05,629 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:32:05,629 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-02-11 00:32:05,629 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [571714904] [2022-02-11 00:32:05,629 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:32:05,629 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-11 00:32:05,629 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:32:05,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-11 00:32:05,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=565, Unknown=0, NotChecked=0, Total=650 [2022-02-11 00:32:05,630 INFO L87 Difference]: Start difference. First operand 948 states and 2819 transitions. Second operand has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 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) [2022-02-11 00:32:06,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:32:06,380 INFO L93 Difference]: Finished difference Result 1080 states and 3080 transitions. [2022-02-11 00:32:06,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-02-11 00:32:06,380 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 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 19 [2022-02-11 00:32:06,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:32:06,381 INFO L225 Difference]: With dead ends: 1080 [2022-02-11 00:32:06,382 INFO L226 Difference]: Without dead ends: 1078 [2022-02-11 00:32:06,382 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 422 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=258, Invalid=1634, Unknown=0, NotChecked=0, Total=1892 [2022-02-11 00:32:06,382 INFO L934 BasicCegarLoop]: 13 mSDtfsCounter, 193 mSDsluCounter, 300 mSDsCounter, 0 mSdLazyCounter, 575 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 193 SdHoareTripleChecker+Valid, 181 SdHoareTripleChecker+Invalid, 645 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 575 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-11 00:32:06,382 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [193 Valid, 181 Invalid, 645 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 575 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-11 00:32:06,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1078 states. [2022-02-11 00:32:06,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1078 to 955. [2022-02-11 00:32:06,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 955 states, 954 states have (on average 2.9758909853249476) internal successors, (2839), 954 states have internal predecessors, (2839), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:32:06,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 955 states to 955 states and 2839 transitions. [2022-02-11 00:32:06,397 INFO L78 Accepts]: Start accepts. Automaton has 955 states and 2839 transitions. Word has length 19 [2022-02-11 00:32:06,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:32:06,397 INFO L470 AbstractCegarLoop]: Abstraction has 955 states and 2839 transitions. [2022-02-11 00:32:06,397 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 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) [2022-02-11 00:32:06,397 INFO L276 IsEmpty]: Start isEmpty. Operand 955 states and 2839 transitions. [2022-02-11 00:32:06,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-02-11 00:32:06,398 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:32:06,398 INFO L515 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:32:06,417 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (285)] Ended with exit code 0 [2022-02-11 00:32:06,598 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable292,285 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:32:06,599 INFO L402 AbstractCegarLoop]: === Iteration 294 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:32:06,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:32:06,599 INFO L85 PathProgramCache]: Analyzing trace with hash 1439353839, now seen corresponding path program 285 times [2022-02-11 00:32:06,599 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:32:06,599 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1429871742] [2022-02-11 00:32:06,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:32:06,599 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:32:06,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:32:06,753 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:32:06,753 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:32:06,754 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1429871742] [2022-02-11 00:32:06,754 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1429871742] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:32:06,754 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1759141638] [2022-02-11 00:32:06,754 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-11 00:32:06,754 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:32:06,754 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:32:06,755 INFO L229 MonitoredProcess]: Starting monitored process 286 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:32:06,755 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (286)] Waiting until timeout for monitored process [2022-02-11 00:32:06,823 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-02-11 00:32:06,824 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:32:06,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 33 conjunts are in the unsatisfiable core [2022-02-11 00:32:06,825 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:32:07,116 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:32:07,116 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:32:07,238 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:32:07,238 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 34 treesize of output 34 [2022-02-11 00:32:07,243 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:32:07,243 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 26 treesize of output 26 [2022-02-11 00:32:07,391 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:32:07,391 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1759141638] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:32:07,391 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:32:07,391 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-02-11 00:32:07,391 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915344463] [2022-02-11 00:32:07,391 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:32:07,391 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-11 00:32:07,391 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:32:07,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-11 00:32:07,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=563, Unknown=0, NotChecked=0, Total=650 [2022-02-11 00:32:07,392 INFO L87 Difference]: Start difference. First operand 955 states and 2839 transitions. Second operand has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 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) [2022-02-11 00:32:08,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:32:08,021 INFO L93 Difference]: Finished difference Result 1036 states and 2989 transitions. [2022-02-11 00:32:08,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-02-11 00:32:08,021 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 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 19 [2022-02-11 00:32:08,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:32:08,023 INFO L225 Difference]: With dead ends: 1036 [2022-02-11 00:32:08,023 INFO L226 Difference]: Without dead ends: 1036 [2022-02-11 00:32:08,023 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 298 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=197, Invalid=1209, Unknown=0, NotChecked=0, Total=1406 [2022-02-11 00:32:08,023 INFO L934 BasicCegarLoop]: 14 mSDtfsCounter, 81 mSDsluCounter, 389 mSDsCounter, 0 mSdLazyCounter, 724 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 219 SdHoareTripleChecker+Invalid, 754 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 724 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-11 00:32:08,023 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 219 Invalid, 754 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 724 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-11 00:32:08,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1036 states. [2022-02-11 00:32:08,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1036 to 946. [2022-02-11 00:32:08,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 946 states, 945 states have (on average 2.9756613756613755) internal successors, (2812), 945 states have internal predecessors, (2812), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:32:08,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 946 states to 946 states and 2812 transitions. [2022-02-11 00:32:08,034 INFO L78 Accepts]: Start accepts. Automaton has 946 states and 2812 transitions. Word has length 19 [2022-02-11 00:32:08,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:32:08,034 INFO L470 AbstractCegarLoop]: Abstraction has 946 states and 2812 transitions. [2022-02-11 00:32:08,034 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 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) [2022-02-11 00:32:08,034 INFO L276 IsEmpty]: Start isEmpty. Operand 946 states and 2812 transitions. [2022-02-11 00:32:08,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-02-11 00:32:08,035 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:32:08,035 INFO L515 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:32:08,051 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (286)] Ended with exit code 0 [2022-02-11 00:32:08,236 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 286 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable293 [2022-02-11 00:32:08,236 INFO L402 AbstractCegarLoop]: === Iteration 295 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:32:08,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:32:08,236 INFO L85 PathProgramCache]: Analyzing trace with hash 178981359, now seen corresponding path program 286 times [2022-02-11 00:32:08,236 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:32:08,236 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1840907578] [2022-02-11 00:32:08,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:32:08,236 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:32:08,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:32:08,372 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:32:08,372 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:32:08,372 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1840907578] [2022-02-11 00:32:08,372 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1840907578] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:32:08,372 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [966459930] [2022-02-11 00:32:08,372 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-11 00:32:08,372 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:32:08,373 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:32:08,373 INFO L229 MonitoredProcess]: Starting monitored process 287 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:32:08,374 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (287)] Waiting until timeout for monitored process [2022-02-11 00:32:08,440 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-11 00:32:08,440 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:32:08,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-11 00:32:08,441 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:32:08,711 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 87 treesize of output 71 [2022-02-11 00:32:08,713 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 55 [2022-02-11 00:32:08,787 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:32:08,787 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:32:08,934 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:32:08,934 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 42 treesize of output 40 [2022-02-11 00:32:08,939 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:32:08,939 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 30 treesize of output 28 [2022-02-11 00:32:09,049 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:32:09,049 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [966459930] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:32:09,049 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:32:09,049 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-02-11 00:32:09,049 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [643916894] [2022-02-11 00:32:09,049 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:32:09,049 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-11 00:32:09,049 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:32:09,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-11 00:32:09,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=570, Unknown=0, NotChecked=0, Total=650 [2022-02-11 00:32:09,050 INFO L87 Difference]: Start difference. First operand 946 states and 2812 transitions. Second operand has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 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) [2022-02-11 00:32:09,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:32:09,890 INFO L93 Difference]: Finished difference Result 1064 states and 3064 transitions. [2022-02-11 00:32:09,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-02-11 00:32:09,890 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 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 19 [2022-02-11 00:32:09,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:32:09,892 INFO L225 Difference]: With dead ends: 1064 [2022-02-11 00:32:09,892 INFO L226 Difference]: Without dead ends: 1062 [2022-02-11 00:32:09,892 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 367 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=278, Invalid=1528, Unknown=0, NotChecked=0, Total=1806 [2022-02-11 00:32:09,892 INFO L934 BasicCegarLoop]: 9 mSDtfsCounter, 155 mSDsluCounter, 241 mSDsCounter, 0 mSdLazyCounter, 566 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 155 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 640 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 566 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-11 00:32:09,892 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [155 Valid, 133 Invalid, 640 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 566 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-11 00:32:09,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1062 states. [2022-02-11 00:32:09,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1062 to 958. [2022-02-11 00:32:09,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 958 states, 957 states have (on average 2.9696969696969697) internal successors, (2842), 957 states have internal predecessors, (2842), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:32:09,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 958 states to 958 states and 2842 transitions. [2022-02-11 00:32:09,903 INFO L78 Accepts]: Start accepts. Automaton has 958 states and 2842 transitions. Word has length 19 [2022-02-11 00:32:09,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:32:09,903 INFO L470 AbstractCegarLoop]: Abstraction has 958 states and 2842 transitions. [2022-02-11 00:32:09,903 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 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) [2022-02-11 00:32:09,903 INFO L276 IsEmpty]: Start isEmpty. Operand 958 states and 2842 transitions. [2022-02-11 00:32:09,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-02-11 00:32:09,904 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:32:09,904 INFO L515 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:32:09,920 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (287)] Forceful destruction successful, exit code 0 [2022-02-11 00:32:10,104 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable294,287 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:32:10,104 INFO L402 AbstractCegarLoop]: === Iteration 296 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:32:10,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:32:10,105 INFO L85 PathProgramCache]: Analyzing trace with hash -1969815177, now seen corresponding path program 287 times [2022-02-11 00:32:10,105 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:32:10,105 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [439939095] [2022-02-11 00:32:10,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:32:10,105 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:32:10,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:32:10,245 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:32:10,245 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:32:10,245 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [439939095] [2022-02-11 00:32:10,245 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [439939095] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:32:10,245 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1175952460] [2022-02-11 00:32:10,245 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-11 00:32:10,246 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:32:10,246 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:32:10,246 INFO L229 MonitoredProcess]: Starting monitored process 288 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:32:10,247 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (288)] Waiting until timeout for monitored process [2022-02-11 00:32:10,319 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-02-11 00:32:10,320 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:32:10,320 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 33 conjunts are in the unsatisfiable core [2022-02-11 00:32:10,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:32:10,706 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:32:10,706 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:32:10,926 INFO L353 Elim1Store]: treesize reduction 19, result has 34.5 percent of original size [2022-02-11 00:32:10,926 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 56 treesize of output 50 [2022-02-11 00:32:10,932 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:32:10,932 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 30 treesize of output 28 [2022-02-11 00:32:11,020 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:32:11,020 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1175952460] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:32:11,020 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:32:11,020 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-02-11 00:32:11,020 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946010736] [2022-02-11 00:32:11,020 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:32:11,020 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-11 00:32:11,020 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:32:11,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-11 00:32:11,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=564, Unknown=0, NotChecked=0, Total=650 [2022-02-11 00:32:11,021 INFO L87 Difference]: Start difference. First operand 958 states and 2842 transitions. Second operand has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 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) [2022-02-11 00:32:11,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:32:11,806 INFO L93 Difference]: Finished difference Result 1019 states and 2961 transitions. [2022-02-11 00:32:11,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-02-11 00:32:11,806 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 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 19 [2022-02-11 00:32:11,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:32:11,808 INFO L225 Difference]: With dead ends: 1019 [2022-02-11 00:32:11,808 INFO L226 Difference]: Without dead ends: 1019 [2022-02-11 00:32:11,808 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 349 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=273, Invalid=1449, Unknown=0, NotChecked=0, Total=1722 [2022-02-11 00:32:11,808 INFO L934 BasicCegarLoop]: 8 mSDtfsCounter, 56 mSDsluCounter, 235 mSDsCounter, 0 mSdLazyCounter, 504 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 529 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 504 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-11 00:32:11,808 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 121 Invalid, 529 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 504 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-11 00:32:11,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1019 states. [2022-02-11 00:32:11,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1019 to 948. [2022-02-11 00:32:11,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 948 states, 947 states have (on average 2.968321013727561) internal successors, (2811), 947 states have internal predecessors, (2811), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:32:11,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 948 states to 948 states and 2811 transitions. [2022-02-11 00:32:11,823 INFO L78 Accepts]: Start accepts. Automaton has 948 states and 2811 transitions. Word has length 19 [2022-02-11 00:32:11,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:32:11,823 INFO L470 AbstractCegarLoop]: Abstraction has 948 states and 2811 transitions. [2022-02-11 00:32:11,823 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 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) [2022-02-11 00:32:11,823 INFO L276 IsEmpty]: Start isEmpty. Operand 948 states and 2811 transitions. [2022-02-11 00:32:11,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-02-11 00:32:11,824 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:32:11,824 INFO L515 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:32:11,842 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (288)] Ended with exit code 0 [2022-02-11 00:32:12,024 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable295,288 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:32:12,024 INFO L402 AbstractCegarLoop]: === Iteration 297 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:32:12,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:32:12,025 INFO L85 PathProgramCache]: Analyzing trace with hash 136968943, now seen corresponding path program 288 times [2022-02-11 00:32:12,025 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:32:12,025 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1181196158] [2022-02-11 00:32:12,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:32:12,025 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:32:12,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:32:12,163 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:32:12,163 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:32:12,163 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1181196158] [2022-02-11 00:32:12,163 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1181196158] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:32:12,163 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [192685734] [2022-02-11 00:32:12,163 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-11 00:32:12,163 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:32:12,163 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:32:12,164 INFO L229 MonitoredProcess]: Starting monitored process 289 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:32:12,165 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (289)] Waiting until timeout for monitored process [2022-02-11 00:32:12,235 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-11 00:32:12,235 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:32:12,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-11 00:32:12,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:32:12,523 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:32:12,523 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:32:12,693 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:32:12,694 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 42 treesize of output 40 [2022-02-11 00:32:12,699 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:32:12,699 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 30 treesize of output 28 [2022-02-11 00:32:12,816 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:32:12,816 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [192685734] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:32:12,816 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:32:12,816 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-02-11 00:32:12,816 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1382894088] [2022-02-11 00:32:12,816 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:32:12,816 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-11 00:32:12,816 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:32:12,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-11 00:32:12,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=568, Unknown=0, NotChecked=0, Total=650 [2022-02-11 00:32:12,816 INFO L87 Difference]: Start difference. First operand 948 states and 2811 transitions. Second operand has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 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) [2022-02-11 00:32:13,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:32:13,229 INFO L93 Difference]: Finished difference Result 997 states and 2900 transitions. [2022-02-11 00:32:13,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-02-11 00:32:13,229 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 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 19 [2022-02-11 00:32:13,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:32:13,230 INFO L225 Difference]: With dead ends: 997 [2022-02-11 00:32:13,230 INFO L226 Difference]: Without dead ends: 997 [2022-02-11 00:32:13,231 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=102, Invalid=710, Unknown=0, NotChecked=0, Total=812 [2022-02-11 00:32:13,231 INFO L934 BasicCegarLoop]: 10 mSDtfsCounter, 46 mSDsluCounter, 364 mSDsCounter, 0 mSdLazyCounter, 758 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 175 SdHoareTripleChecker+Invalid, 767 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 758 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-11 00:32:13,231 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 175 Invalid, 767 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 758 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-11 00:32:13,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 997 states. [2022-02-11 00:32:13,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 997 to 939. [2022-02-11 00:32:13,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 939 states, 938 states have (on average 2.964818763326226) internal successors, (2781), 938 states have internal predecessors, (2781), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:32:13,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 939 states to 939 states and 2781 transitions. [2022-02-11 00:32:13,241 INFO L78 Accepts]: Start accepts. Automaton has 939 states and 2781 transitions. Word has length 19 [2022-02-11 00:32:13,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:32:13,241 INFO L470 AbstractCegarLoop]: Abstraction has 939 states and 2781 transitions. [2022-02-11 00:32:13,241 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 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) [2022-02-11 00:32:13,241 INFO L276 IsEmpty]: Start isEmpty. Operand 939 states and 2781 transitions. [2022-02-11 00:32:13,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-02-11 00:32:13,242 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:32:13,242 INFO L515 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:32:13,258 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (289)] Ended with exit code 0 [2022-02-11 00:32:13,442 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable296,289 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:32:13,442 INFO L402 AbstractCegarLoop]: === Iteration 298 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:32:13,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:32:13,443 INFO L85 PathProgramCache]: Analyzing trace with hash 1868924263, now seen corresponding path program 289 times [2022-02-11 00:32:13,443 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:32:13,443 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [267781600] [2022-02-11 00:32:13,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:32:13,443 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:32:13,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:32:13,571 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:32:13,572 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:32:13,572 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [267781600] [2022-02-11 00:32:13,572 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [267781600] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:32:13,572 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [252817698] [2022-02-11 00:32:13,572 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-11 00:32:13,572 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:32:13,572 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:32:13,573 INFO L229 MonitoredProcess]: Starting monitored process 290 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:32:13,573 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (290)] Waiting until timeout for monitored process [2022-02-11 00:32:13,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:32:13,649 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-11 00:32:13,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:32:13,954 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 73 [2022-02-11 00:32:13,956 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 57 [2022-02-11 00:32:14,030 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:32:14,030 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:32:14,219 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:32:14,219 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 41 treesize of output 39 [2022-02-11 00:32:14,224 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:32:14,224 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 29 treesize of output 27 [2022-02-11 00:32:14,326 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:32:14,326 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [252817698] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:32:14,326 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:32:14,326 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 27 [2022-02-11 00:32:14,326 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [534514544] [2022-02-11 00:32:14,326 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:32:14,326 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-11 00:32:14,326 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:32:14,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-11 00:32:14,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=628, Unknown=0, NotChecked=0, Total=702 [2022-02-11 00:32:14,327 INFO L87 Difference]: Start difference. First operand 939 states and 2781 transitions. Second operand has 27 states, 27 states have (on average 1.4074074074074074) internal successors, (38), 27 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) [2022-02-11 00:32:15,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:32:15,409 INFO L93 Difference]: Finished difference Result 1044 states and 2991 transitions. [2022-02-11 00:32:15,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-02-11 00:32:15,409 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.4074074074074074) internal successors, (38), 27 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 19 [2022-02-11 00:32:15,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:32:15,410 INFO L225 Difference]: With dead ends: 1044 [2022-02-11 00:32:15,410 INFO L226 Difference]: Without dead ends: 1042 [2022-02-11 00:32:15,411 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 341 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=360, Invalid=1896, Unknown=0, NotChecked=0, Total=2256 [2022-02-11 00:32:15,411 INFO L934 BasicCegarLoop]: 8 mSDtfsCounter, 164 mSDsluCounter, 260 mSDsCounter, 0 mSdLazyCounter, 537 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 143 SdHoareTripleChecker+Invalid, 611 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 537 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-11 00:32:15,411 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [164 Valid, 143 Invalid, 611 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 537 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-11 00:32:15,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1042 states. [2022-02-11 00:32:15,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1042 to 927. [2022-02-11 00:32:15,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 927 states, 926 states have (on average 2.9600431965442766) internal successors, (2741), 926 states have internal predecessors, (2741), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:32:15,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 927 states to 927 states and 2741 transitions. [2022-02-11 00:32:15,421 INFO L78 Accepts]: Start accepts. Automaton has 927 states and 2741 transitions. Word has length 19 [2022-02-11 00:32:15,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:32:15,421 INFO L470 AbstractCegarLoop]: Abstraction has 927 states and 2741 transitions. [2022-02-11 00:32:15,421 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.4074074074074074) internal successors, (38), 27 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) [2022-02-11 00:32:15,421 INFO L276 IsEmpty]: Start isEmpty. Operand 927 states and 2741 transitions. [2022-02-11 00:32:15,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-02-11 00:32:15,422 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:32:15,422 INFO L515 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:32:15,438 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (290)] Ended with exit code 0 [2022-02-11 00:32:15,623 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 290 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable297 [2022-02-11 00:32:15,623 INFO L402 AbstractCegarLoop]: === Iteration 299 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:32:15,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:32:15,623 INFO L85 PathProgramCache]: Analyzing trace with hash -279872273, now seen corresponding path program 290 times [2022-02-11 00:32:15,623 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:32:15,623 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1726209125] [2022-02-11 00:32:15,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:32:15,623 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:32:15,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:32:15,749 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:32:15,749 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:32:15,749 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1726209125] [2022-02-11 00:32:15,749 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1726209125] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:32:15,749 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [347239125] [2022-02-11 00:32:15,749 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-11 00:32:15,749 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:32:15,750 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:32:15,750 INFO L229 MonitoredProcess]: Starting monitored process 291 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:32:15,751 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (291)] Waiting until timeout for monitored process [2022-02-11 00:32:15,818 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-11 00:32:15,818 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:32:15,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 33 conjunts are in the unsatisfiable core [2022-02-11 00:32:15,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:32:16,145 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:32:16,146 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:32:16,349 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:32:16,349 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 43 treesize of output 41 [2022-02-11 00:32:16,354 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:32:16,354 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 31 treesize of output 29 [2022-02-11 00:32:16,456 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:32:16,456 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [347239125] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:32:16,456 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:32:16,456 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 27 [2022-02-11 00:32:16,456 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287082957] [2022-02-11 00:32:16,456 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:32:16,456 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-11 00:32:16,456 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:32:16,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-11 00:32:16,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=626, Unknown=0, NotChecked=0, Total=702 [2022-02-11 00:32:16,456 INFO L87 Difference]: Start difference. First operand 927 states and 2741 transitions. Second operand has 27 states, 27 states have (on average 1.4074074074074074) internal successors, (38), 27 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) [2022-02-11 00:32:17,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:32:17,591 INFO L93 Difference]: Finished difference Result 1026 states and 2943 transitions. [2022-02-11 00:32:17,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-02-11 00:32:17,591 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.4074074074074074) internal successors, (38), 27 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 19 [2022-02-11 00:32:17,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:32:17,592 INFO L225 Difference]: With dead ends: 1026 [2022-02-11 00:32:17,592 INFO L226 Difference]: Without dead ends: 1026 [2022-02-11 00:32:17,592 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 332 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=294, Invalid=1868, Unknown=0, NotChecked=0, Total=2162 [2022-02-11 00:32:17,593 INFO L934 BasicCegarLoop]: 8 mSDtfsCounter, 99 mSDsluCounter, 317 mSDsCounter, 0 mSdLazyCounter, 746 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 792 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 746 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-11 00:32:17,593 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 158 Invalid, 792 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 746 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-11 00:32:17,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1026 states. [2022-02-11 00:32:17,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1026 to 926. [2022-02-11 00:32:17,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 926 states, 925 states have (on average 2.96) internal successors, (2738), 925 states have internal predecessors, (2738), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:32:17,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 926 states to 926 states and 2738 transitions. [2022-02-11 00:32:17,603 INFO L78 Accepts]: Start accepts. Automaton has 926 states and 2738 transitions. Word has length 19 [2022-02-11 00:32:17,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:32:17,603 INFO L470 AbstractCegarLoop]: Abstraction has 926 states and 2738 transitions. [2022-02-11 00:32:17,603 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.4074074074074074) internal successors, (38), 27 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) [2022-02-11 00:32:17,603 INFO L276 IsEmpty]: Start isEmpty. Operand 926 states and 2738 transitions. [2022-02-11 00:32:17,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-02-11 00:32:17,604 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:32:17,604 INFO L515 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:32:17,620 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (291)] Ended with exit code 0 [2022-02-11 00:32:17,817 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 291 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable298 [2022-02-11 00:32:17,818 INFO L402 AbstractCegarLoop]: === Iteration 300 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:32:17,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:32:17,818 INFO L85 PathProgramCache]: Analyzing trace with hash 1826911847, now seen corresponding path program 291 times [2022-02-11 00:32:17,818 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:32:17,818 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [190951324] [2022-02-11 00:32:17,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:32:17,818 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:32:17,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:32:17,950 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:32:17,951 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:32:17,951 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [190951324] [2022-02-11 00:32:17,951 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [190951324] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:32:17,951 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1357210348] [2022-02-11 00:32:17,951 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-11 00:32:17,951 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:32:17,951 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:32:17,954 INFO L229 MonitoredProcess]: Starting monitored process 292 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:32:17,954 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (292)] Waiting until timeout for monitored process [2022-02-11 00:32:18,028 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-11 00:32:18,028 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:32:18,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 33 conjunts are in the unsatisfiable core [2022-02-11 00:32:18,030 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:32:18,352 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:32:18,352 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:32:18,551 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-02-11 00:32:18,552 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 41 treesize of output 34 [2022-02-11 00:32:18,553 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 10 [2022-02-11 00:32:18,647 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:32:18,648 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1357210348] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:32:18,648 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:32:18,648 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 28 [2022-02-11 00:32:18,648 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950000193] [2022-02-11 00:32:18,648 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:32:18,648 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-02-11 00:32:18,648 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:32:18,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-02-11 00:32:18,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=664, Unknown=0, NotChecked=0, Total=756 [2022-02-11 00:32:18,648 INFO L87 Difference]: Start difference. First operand 926 states and 2738 transitions. Second operand has 28 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 28 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) [2022-02-11 00:32:22,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:32:22,983 INFO L93 Difference]: Finished difference Result 1474 states and 4023 transitions. [2022-02-11 00:32:22,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2022-02-11 00:32:22,983 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 28 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 19 [2022-02-11 00:32:22,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:32:22,985 INFO L225 Difference]: With dead ends: 1474 [2022-02-11 00:32:22,985 INFO L226 Difference]: Without dead ends: 1474 [2022-02-11 00:32:22,986 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3056 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=1709, Invalid=8391, Unknown=0, NotChecked=0, Total=10100 [2022-02-11 00:32:22,986 INFO L934 BasicCegarLoop]: 18 mSDtfsCounter, 225 mSDsluCounter, 469 mSDsCounter, 0 mSdLazyCounter, 1229 mSolverCounterSat, 115 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 225 SdHoareTripleChecker+Valid, 289 SdHoareTripleChecker+Invalid, 1344 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 115 IncrementalHoareTripleChecker+Valid, 1229 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-11 00:32:22,986 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [225 Valid, 289 Invalid, 1344 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [115 Valid, 1229 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-11 00:32:22,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1474 states. [2022-02-11 00:32:23,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1474 to 1031. [2022-02-11 00:32:23,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1031 states, 1030 states have (on average 2.9883495145631067) internal successors, (3078), 1030 states have internal predecessors, (3078), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:32:23,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1031 states to 1031 states and 3078 transitions. [2022-02-11 00:32:23,005 INFO L78 Accepts]: Start accepts. Automaton has 1031 states and 3078 transitions. Word has length 19 [2022-02-11 00:32:23,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:32:23,005 INFO L470 AbstractCegarLoop]: Abstraction has 1031 states and 3078 transitions. [2022-02-11 00:32:23,005 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 28 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) [2022-02-11 00:32:23,006 INFO L276 IsEmpty]: Start isEmpty. Operand 1031 states and 3078 transitions. [2022-02-11 00:32:23,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-02-11 00:32:23,007 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:32:23,007 INFO L515 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:32:23,022 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (292)] Ended with exit code 0 [2022-02-11 00:32:23,207 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 292 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable299 [2022-02-11 00:32:23,207 INFO L402 AbstractCegarLoop]: === Iteration 301 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:32:23,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:32:23,207 INFO L85 PathProgramCache]: Analyzing trace with hash -1582257169, now seen corresponding path program 292 times [2022-02-11 00:32:23,208 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:32:23,208 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [879978287] [2022-02-11 00:32:23,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:32:23,208 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:32:23,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:32:23,325 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:32:23,325 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:32:23,325 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [879978287] [2022-02-11 00:32:23,325 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [879978287] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:32:23,325 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [127761389] [2022-02-11 00:32:23,325 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-11 00:32:23,325 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:32:23,325 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:32:23,326 INFO L229 MonitoredProcess]: Starting monitored process 293 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:32:23,327 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (293)] Waiting until timeout for monitored process [2022-02-11 00:32:23,393 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-11 00:32:23,394 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:32:23,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-11 00:32:23,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:32:23,662 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:32:23,662 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:32:23,842 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:32:23,842 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 42 treesize of output 40 [2022-02-11 00:32:23,848 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:32:23,848 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 30 treesize of output 28 [2022-02-11 00:32:23,946 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:32:23,947 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [127761389] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:32:23,947 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:32:23,947 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 27 [2022-02-11 00:32:23,947 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [350992813] [2022-02-11 00:32:23,947 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:32:23,947 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-11 00:32:23,947 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:32:23,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-11 00:32:23,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=628, Unknown=0, NotChecked=0, Total=702 [2022-02-11 00:32:23,947 INFO L87 Difference]: Start difference. First operand 1031 states and 3078 transitions. Second operand has 27 states, 27 states have (on average 1.4074074074074074) internal successors, (38), 27 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) [2022-02-11 00:32:24,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:32:24,343 INFO L93 Difference]: Finished difference Result 1160 states and 3368 transitions. [2022-02-11 00:32:24,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-02-11 00:32:24,343 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.4074074074074074) internal successors, (38), 27 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 19 [2022-02-11 00:32:24,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:32:24,344 INFO L225 Difference]: With dead ends: 1160 [2022-02-11 00:32:24,344 INFO L226 Difference]: Without dead ends: 1160 [2022-02-11 00:32:24,345 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=103, Invalid=889, Unknown=0, NotChecked=0, Total=992 [2022-02-11 00:32:24,345 INFO L934 BasicCegarLoop]: 9 mSDtfsCounter, 50 mSDsluCounter, 338 mSDsCounter, 0 mSdLazyCounter, 641 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 645 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 641 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-11 00:32:24,345 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 153 Invalid, 645 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 641 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-11 00:32:24,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1160 states. [2022-02-11 00:32:24,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1160 to 1021. [2022-02-11 00:32:24,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1021 states, 1020 states have (on average 2.9862745098039216) internal successors, (3046), 1020 states have internal predecessors, (3046), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:32:24,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1021 states to 1021 states and 3046 transitions. [2022-02-11 00:32:24,356 INFO L78 Accepts]: Start accepts. Automaton has 1021 states and 3046 transitions. Word has length 19 [2022-02-11 00:32:24,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:32:24,356 INFO L470 AbstractCegarLoop]: Abstraction has 1021 states and 3046 transitions. [2022-02-11 00:32:24,356 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.4074074074074074) internal successors, (38), 27 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) [2022-02-11 00:32:24,356 INFO L276 IsEmpty]: Start isEmpty. Operand 1021 states and 3046 transitions. [2022-02-11 00:32:24,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-02-11 00:32:24,357 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:32:24,358 INFO L515 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:32:24,374 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (293)] Ended with exit code 0 [2022-02-11 00:32:24,558 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 293 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable300 [2022-02-11 00:32:24,558 INFO L402 AbstractCegarLoop]: === Iteration 302 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:32:24,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:32:24,558 INFO L85 PathProgramCache]: Analyzing trace with hash -815124365, now seen corresponding path program 293 times [2022-02-11 00:32:24,558 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:32:24,558 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1609717486] [2022-02-11 00:32:24,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:32:24,558 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:32:24,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:32:24,684 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:32:24,685 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:32:24,685 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1609717486] [2022-02-11 00:32:24,685 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1609717486] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:32:24,685 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [919441316] [2022-02-11 00:32:24,685 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-11 00:32:24,685 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:32:24,685 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:32:24,686 INFO L229 MonitoredProcess]: Starting monitored process 294 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:32:24,686 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (294)] Waiting until timeout for monitored process [2022-02-11 00:32:24,758 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-02-11 00:32:24,758 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:32:24,759 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-11 00:32:24,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:32:25,048 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:32:25,048 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:32:25,229 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:32:25,230 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 42 treesize of output 40 [2022-02-11 00:32:25,235 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:32:25,235 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 30 treesize of output 28 [2022-02-11 00:32:25,346 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:32:25,346 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [919441316] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:32:25,347 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:32:25,347 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-02-11 00:32:25,347 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983714678] [2022-02-11 00:32:25,347 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:32:25,347 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-11 00:32:25,347 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:32:25,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-11 00:32:25,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=560, Unknown=0, NotChecked=0, Total=650 [2022-02-11 00:32:25,347 INFO L87 Difference]: Start difference. First operand 1021 states and 3046 transitions. Second operand has 26 states, 26 states have (on average 1.4615384615384615) internal successors, (38), 26 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) [2022-02-11 00:32:25,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:32:25,913 INFO L93 Difference]: Finished difference Result 1137 states and 3285 transitions. [2022-02-11 00:32:25,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-02-11 00:32:25,913 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.4615384615384615) internal successors, (38), 26 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 19 [2022-02-11 00:32:25,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:32:25,915 INFO L225 Difference]: With dead ends: 1137 [2022-02-11 00:32:25,915 INFO L226 Difference]: Without dead ends: 1137 [2022-02-11 00:32:25,915 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 228 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=172, Invalid=1088, Unknown=0, NotChecked=0, Total=1260 [2022-02-11 00:32:25,915 INFO L934 BasicCegarLoop]: 16 mSDtfsCounter, 114 mSDsluCounter, 328 mSDsCounter, 0 mSdLazyCounter, 765 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 182 SdHoareTripleChecker+Invalid, 787 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 765 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-11 00:32:25,915 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 182 Invalid, 787 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 765 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-11 00:32:25,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1137 states. [2022-02-11 00:32:25,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1137 to 1023. [2022-02-11 00:32:25,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1023 states, 1022 states have (on average 2.9892367906066535) internal successors, (3055), 1022 states have internal predecessors, (3055), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:32:25,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1023 states to 1023 states and 3055 transitions. [2022-02-11 00:32:25,927 INFO L78 Accepts]: Start accepts. Automaton has 1023 states and 3055 transitions. Word has length 19 [2022-02-11 00:32:25,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:32:25,928 INFO L470 AbstractCegarLoop]: Abstraction has 1023 states and 3055 transitions. [2022-02-11 00:32:25,928 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.4615384615384615) internal successors, (38), 26 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) [2022-02-11 00:32:25,928 INFO L276 IsEmpty]: Start isEmpty. Operand 1023 states and 3055 transitions. [2022-02-11 00:32:25,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-02-11 00:32:25,929 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:32:25,929 INFO L515 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:32:25,945 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (294)] Forceful destruction successful, exit code 0 [2022-02-11 00:32:26,129 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable301,294 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:32:26,129 INFO L402 AbstractCegarLoop]: === Iteration 303 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:32:26,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:32:26,129 INFO L85 PathProgramCache]: Analyzing trace with hash 1291659755, now seen corresponding path program 294 times [2022-02-11 00:32:26,130 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:32:26,130 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [108077533] [2022-02-11 00:32:26,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:32:26,130 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:32:26,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:32:26,258 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:32:26,258 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:32:26,258 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [108077533] [2022-02-11 00:32:26,258 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [108077533] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:32:26,258 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [986542443] [2022-02-11 00:32:26,259 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-11 00:32:26,259 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:32:26,259 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:32:26,259 INFO L229 MonitoredProcess]: Starting monitored process 295 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:32:26,260 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (295)] Waiting until timeout for monitored process [2022-02-11 00:32:26,329 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-02-11 00:32:26,329 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:32:26,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-11 00:32:26,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:32:26,631 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:32:26,632 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:32:26,782 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:32:26,782 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 41 treesize of output 39 [2022-02-11 00:32:26,787 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:32:26,787 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 29 treesize of output 27 [2022-02-11 00:32:26,892 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:32:26,892 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [986542443] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:32:26,892 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:32:26,893 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-02-11 00:32:26,893 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1469977029] [2022-02-11 00:32:26,893 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:32:26,893 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-11 00:32:26,893 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:32:26,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-11 00:32:26,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=563, Unknown=0, NotChecked=0, Total=650 [2022-02-11 00:32:26,893 INFO L87 Difference]: Start difference. First operand 1023 states and 3055 transitions. Second operand has 26 states, 26 states have (on average 1.4615384615384615) internal successors, (38), 26 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) [2022-02-11 00:32:27,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:32:27,752 INFO L93 Difference]: Finished difference Result 1169 states and 3368 transitions. [2022-02-11 00:32:27,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-02-11 00:32:27,752 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.4615384615384615) internal successors, (38), 26 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 19 [2022-02-11 00:32:27,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:32:27,753 INFO L225 Difference]: With dead ends: 1169 [2022-02-11 00:32:27,753 INFO L226 Difference]: Without dead ends: 1169 [2022-02-11 00:32:27,754 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 375 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=255, Invalid=1637, Unknown=0, NotChecked=0, Total=1892 [2022-02-11 00:32:27,754 INFO L934 BasicCegarLoop]: 11 mSDtfsCounter, 50 mSDsluCounter, 332 mSDsCounter, 0 mSdLazyCounter, 850 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 189 SdHoareTripleChecker+Invalid, 877 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 850 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-11 00:32:27,754 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 189 Invalid, 877 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 850 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-11 00:32:27,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1169 states. [2022-02-11 00:32:27,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1169 to 1019. [2022-02-11 00:32:27,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1019 states, 1018 states have (on average 2.986247544204322) internal successors, (3040), 1018 states have internal predecessors, (3040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:32:27,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1019 states to 1019 states and 3040 transitions. [2022-02-11 00:32:27,765 INFO L78 Accepts]: Start accepts. Automaton has 1019 states and 3040 transitions. Word has length 19 [2022-02-11 00:32:27,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:32:27,766 INFO L470 AbstractCegarLoop]: Abstraction has 1019 states and 3040 transitions. [2022-02-11 00:32:27,766 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.4615384615384615) internal successors, (38), 26 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) [2022-02-11 00:32:27,766 INFO L276 IsEmpty]: Start isEmpty. Operand 1019 states and 3040 transitions. [2022-02-11 00:32:27,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-02-11 00:32:27,767 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:32:27,767 INFO L515 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:32:27,783 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (295)] Forceful destruction successful, exit code 0 [2022-02-11 00:32:27,967 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 295 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable302 [2022-02-11 00:32:27,967 INFO L402 AbstractCegarLoop]: === Iteration 304 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:32:27,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:32:27,967 INFO L85 PathProgramCache]: Analyzing trace with hash -857136781, now seen corresponding path program 295 times [2022-02-11 00:32:27,967 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:32:27,968 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1577284126] [2022-02-11 00:32:27,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:32:27,968 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:32:27,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:32:28,108 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:32:28,108 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:32:28,108 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1577284126] [2022-02-11 00:32:28,108 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1577284126] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:32:28,108 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2131255769] [2022-02-11 00:32:28,108 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-11 00:32:28,108 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:32:28,108 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:32:28,109 INFO L229 MonitoredProcess]: Starting monitored process 296 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:32:28,110 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (296)] Waiting until timeout for monitored process [2022-02-11 00:32:28,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:32:28,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 33 conjunts are in the unsatisfiable core [2022-02-11 00:32:28,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:32:28,525 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 103 treesize of output 83 [2022-02-11 00:32:28,528 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 55 [2022-02-11 00:32:28,603 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:32:28,603 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:32:28,845 INFO L353 Elim1Store]: treesize reduction 12, result has 63.6 percent of original size [2022-02-11 00:32:28,845 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 64 treesize of output 64 [2022-02-11 00:32:28,848 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:32:28,855 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:32:28,855 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 44 treesize of output 46 [2022-02-11 00:32:28,972 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:32:28,972 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2131255769] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:32:28,972 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:32:28,972 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 27 [2022-02-11 00:32:28,972 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [212179973] [2022-02-11 00:32:28,972 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:32:28,972 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-11 00:32:28,972 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:32:28,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-11 00:32:28,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=606, Unknown=0, NotChecked=0, Total=702 [2022-02-11 00:32:28,973 INFO L87 Difference]: Start difference. First operand 1019 states and 3040 transitions. Second operand has 27 states, 27 states have (on average 1.4444444444444444) internal successors, (39), 27 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) [2022-02-11 00:32:29,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:32:29,831 INFO L93 Difference]: Finished difference Result 1110 states and 3222 transitions. [2022-02-11 00:32:29,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-02-11 00:32:29,832 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.4444444444444444) internal successors, (39), 27 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 19 [2022-02-11 00:32:29,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:32:29,833 INFO L225 Difference]: With dead ends: 1110 [2022-02-11 00:32:29,833 INFO L226 Difference]: Without dead ends: 1110 [2022-02-11 00:32:29,833 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 306 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=222, Invalid=1418, Unknown=0, NotChecked=0, Total=1640 [2022-02-11 00:32:29,833 INFO L934 BasicCegarLoop]: 18 mSDtfsCounter, 111 mSDsluCounter, 416 mSDsCounter, 0 mSdLazyCounter, 960 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 268 SdHoareTripleChecker+Invalid, 997 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 960 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-11 00:32:29,833 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 268 Invalid, 997 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 960 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-11 00:32:29,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1110 states. [2022-02-11 00:32:29,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1110 to 1020. [2022-02-11 00:32:29,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1020 states, 1019 states have (on average 2.987242394504416) internal successors, (3044), 1019 states have internal predecessors, (3044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:32:29,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1020 states to 1020 states and 3044 transitions. [2022-02-11 00:32:29,845 INFO L78 Accepts]: Start accepts. Automaton has 1020 states and 3044 transitions. Word has length 19 [2022-02-11 00:32:29,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:32:29,845 INFO L470 AbstractCegarLoop]: Abstraction has 1020 states and 3044 transitions. [2022-02-11 00:32:29,845 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.4444444444444444) internal successors, (39), 27 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) [2022-02-11 00:32:29,846 INFO L276 IsEmpty]: Start isEmpty. Operand 1020 states and 3044 transitions. [2022-02-11 00:32:29,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-02-11 00:32:29,847 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:32:29,847 INFO L515 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:32:29,862 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (296)] Ended with exit code 0 [2022-02-11 00:32:30,047 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 296 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable303 [2022-02-11 00:32:30,047 INFO L402 AbstractCegarLoop]: === Iteration 305 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:32:30,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:32:30,047 INFO L85 PathProgramCache]: Analyzing trace with hash 2093174571, now seen corresponding path program 296 times [2022-02-11 00:32:30,047 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:32:30,047 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1670006634] [2022-02-11 00:32:30,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:32:30,048 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:32:30,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:32:30,173 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:32:30,173 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:32:30,173 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1670006634] [2022-02-11 00:32:30,173 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1670006634] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:32:30,173 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1375658756] [2022-02-11 00:32:30,173 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-11 00:32:30,173 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:32:30,173 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:32:30,174 INFO L229 MonitoredProcess]: Starting monitored process 297 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:32:30,174 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (297)] Waiting until timeout for monitored process [2022-02-11 00:32:30,242 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-11 00:32:30,243 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:32:30,243 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-11 00:32:30,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:32:30,543 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 96 treesize of output 80 [2022-02-11 00:32:30,544 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 80 treesize of output 64 [2022-02-11 00:32:30,616 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:32:30,617 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:32:30,736 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:32:30,736 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 73 treesize of output 67 [2022-02-11 00:32:30,743 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:32:30,743 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 57 treesize of output 51 [2022-02-11 00:32:30,895 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:32:30,895 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1375658756] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:32:30,895 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:32:30,895 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-02-11 00:32:30,895 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [227778549] [2022-02-11 00:32:30,895 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:32:30,895 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-11 00:32:30,895 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:32:30,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-11 00:32:30,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=549, Unknown=0, NotChecked=0, Total=650 [2022-02-11 00:32:30,896 INFO L87 Difference]: Start difference. First operand 1020 states and 3044 transitions. Second operand has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 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) [2022-02-11 00:32:31,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:32:31,500 INFO L93 Difference]: Finished difference Result 1109 states and 3205 transitions. [2022-02-11 00:32:31,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-02-11 00:32:31,500 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 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 19 [2022-02-11 00:32:31,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:32:31,501 INFO L225 Difference]: With dead ends: 1109 [2022-02-11 00:32:31,501 INFO L226 Difference]: Without dead ends: 1105 [2022-02-11 00:32:31,501 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 277 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=216, Invalid=1190, Unknown=0, NotChecked=0, Total=1406 [2022-02-11 00:32:31,502 INFO L934 BasicCegarLoop]: 17 mSDtfsCounter, 125 mSDsluCounter, 319 mSDsCounter, 0 mSdLazyCounter, 678 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 205 SdHoareTripleChecker+Invalid, 718 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 678 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-11 00:32:31,502 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [125 Valid, 205 Invalid, 718 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 678 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-11 00:32:31,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1105 states. [2022-02-11 00:32:31,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1105 to 1012. [2022-02-11 00:32:31,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1012 states, 1011 states have (on average 2.984174085064293) internal successors, (3017), 1011 states have internal predecessors, (3017), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:32:31,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1012 states to 1012 states and 3017 transitions. [2022-02-11 00:32:31,512 INFO L78 Accepts]: Start accepts. Automaton has 1012 states and 3017 transitions. Word has length 19 [2022-02-11 00:32:31,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:32:31,513 INFO L470 AbstractCegarLoop]: Abstraction has 1012 states and 3017 transitions. [2022-02-11 00:32:31,513 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 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) [2022-02-11 00:32:31,513 INFO L276 IsEmpty]: Start isEmpty. Operand 1012 states and 3017 transitions. [2022-02-11 00:32:31,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-02-11 00:32:31,514 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:32:31,514 INFO L515 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:32:31,530 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (297)] Ended with exit code 0 [2022-02-11 00:32:31,726 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 297 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable304 [2022-02-11 00:32:31,726 INFO L402 AbstractCegarLoop]: === Iteration 306 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:32:31,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:32:31,727 INFO L85 PathProgramCache]: Analyzing trace with hash 790789675, now seen corresponding path program 297 times [2022-02-11 00:32:31,727 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:32:31,727 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1278215414] [2022-02-11 00:32:31,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:32:31,727 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:32:31,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:32:31,886 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:32:31,887 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:32:31,887 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1278215414] [2022-02-11 00:32:31,887 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1278215414] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:32:31,887 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [743795143] [2022-02-11 00:32:31,887 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-11 00:32:31,887 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:32:31,887 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:32:31,888 INFO L229 MonitoredProcess]: Starting monitored process 298 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:32:31,888 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (298)] Waiting until timeout for monitored process [2022-02-11 00:32:31,963 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-02-11 00:32:31,964 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:32:31,964 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-11 00:32:31,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:32:32,237 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 87 treesize of output 71 [2022-02-11 00:32:32,239 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 55 [2022-02-11 00:32:32,307 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:32:32,308 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:32:32,458 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:32:32,458 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 34 treesize of output 34 [2022-02-11 00:32:32,463 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:32:32,463 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 26 treesize of output 26 [2022-02-11 00:32:32,591 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:32:32,591 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [743795143] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:32:32,591 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:32:32,591 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-02-11 00:32:32,592 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [900045370] [2022-02-11 00:32:32,592 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:32:32,592 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-11 00:32:32,592 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:32:32,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-11 00:32:32,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=562, Unknown=0, NotChecked=0, Total=650 [2022-02-11 00:32:32,592 INFO L87 Difference]: Start difference. First operand 1012 states and 3017 transitions. Second operand has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 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) [2022-02-11 00:32:33,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:32:33,169 INFO L93 Difference]: Finished difference Result 1150 states and 3310 transitions. [2022-02-11 00:32:33,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-02-11 00:32:33,169 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 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 19 [2022-02-11 00:32:33,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:32:33,171 INFO L225 Difference]: With dead ends: 1150 [2022-02-11 00:32:33,171 INFO L226 Difference]: Without dead ends: 1148 [2022-02-11 00:32:33,171 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 257 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=190, Invalid=1142, Unknown=0, NotChecked=0, Total=1332 [2022-02-11 00:32:33,171 INFO L934 BasicCegarLoop]: 10 mSDtfsCounter, 114 mSDsluCounter, 282 mSDsCounter, 0 mSdLazyCounter, 702 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 748 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 702 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-11 00:32:33,171 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 151 Invalid, 748 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 702 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-11 00:32:33,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1148 states. [2022-02-11 00:32:33,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1148 to 1015. [2022-02-11 00:32:33,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1015 states, 1014 states have (on average 2.9822485207100593) internal successors, (3024), 1014 states have internal predecessors, (3024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:32:33,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1015 states to 1015 states and 3024 transitions. [2022-02-11 00:32:33,183 INFO L78 Accepts]: Start accepts. Automaton has 1015 states and 3024 transitions. Word has length 19 [2022-02-11 00:32:33,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:32:33,183 INFO L470 AbstractCegarLoop]: Abstraction has 1015 states and 3024 transitions. [2022-02-11 00:32:33,183 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 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) [2022-02-11 00:32:33,183 INFO L276 IsEmpty]: Start isEmpty. Operand 1015 states and 3024 transitions. [2022-02-11 00:32:33,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-02-11 00:32:33,184 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:32:33,184 INFO L515 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:32:33,201 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (298)] Forceful destruction successful, exit code 0 [2022-02-11 00:32:33,384 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable305,298 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:32:33,385 INFO L402 AbstractCegarLoop]: === Iteration 307 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:32:33,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:32:33,385 INFO L85 PathProgramCache]: Analyzing trace with hash -1358006861, now seen corresponding path program 298 times [2022-02-11 00:32:33,385 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:32:33,385 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [740374304] [2022-02-11 00:32:33,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:32:33,385 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:32:33,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:32:33,532 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:32:33,533 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:32:33,533 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [740374304] [2022-02-11 00:32:33,533 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [740374304] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:32:33,533 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1385847778] [2022-02-11 00:32:33,533 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-11 00:32:33,533 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:32:33,533 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:32:33,534 INFO L229 MonitoredProcess]: Starting monitored process 299 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:32:33,534 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (299)] Waiting until timeout for monitored process [2022-02-11 00:32:33,602 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-11 00:32:33,602 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:32:33,603 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-11 00:32:33,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:32:33,890 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:32:33,890 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:32:34,012 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:32:34,012 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 33 treesize of output 33 [2022-02-11 00:32:34,017 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:32:34,017 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 25 treesize of output 25 [2022-02-11 00:32:34,135 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:32:34,135 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1385847778] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:32:34,135 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:32:34,135 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-02-11 00:32:34,135 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [773711491] [2022-02-11 00:32:34,135 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:32:34,135 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-11 00:32:34,135 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:32:34,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-11 00:32:34,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=560, Unknown=0, NotChecked=0, Total=650 [2022-02-11 00:32:34,136 INFO L87 Difference]: Start difference. First operand 1015 states and 3024 transitions. Second operand has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 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) [2022-02-11 00:32:34,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:32:34,632 INFO L93 Difference]: Finished difference Result 1099 states and 3203 transitions. [2022-02-11 00:32:34,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-02-11 00:32:34,633 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 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 19 [2022-02-11 00:32:34,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:32:34,634 INFO L225 Difference]: With dead ends: 1099 [2022-02-11 00:32:34,634 INFO L226 Difference]: Without dead ends: 1099 [2022-02-11 00:32:34,634 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=134, Invalid=858, Unknown=0, NotChecked=0, Total=992 [2022-02-11 00:32:34,634 INFO L934 BasicCegarLoop]: 9 mSDtfsCounter, 38 mSDsluCounter, 350 mSDsCounter, 0 mSdLazyCounter, 878 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 166 SdHoareTripleChecker+Invalid, 895 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 878 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-11 00:32:34,634 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 166 Invalid, 895 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 878 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-11 00:32:34,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1099 states. [2022-02-11 00:32:34,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1099 to 1013. [2022-02-11 00:32:34,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1013 states, 1012 states have (on average 2.9822134387351777) internal successors, (3018), 1012 states have internal predecessors, (3018), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:32:34,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1013 states to 1013 states and 3018 transitions. [2022-02-11 00:32:34,651 INFO L78 Accepts]: Start accepts. Automaton has 1013 states and 3018 transitions. Word has length 19 [2022-02-11 00:32:34,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:32:34,651 INFO L470 AbstractCegarLoop]: Abstraction has 1013 states and 3018 transitions. [2022-02-11 00:32:34,651 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 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) [2022-02-11 00:32:34,651 INFO L276 IsEmpty]: Start isEmpty. Operand 1013 states and 3018 transitions. [2022-02-11 00:32:34,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-02-11 00:32:34,652 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:32:34,652 INFO L515 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:32:34,668 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (299)] Ended with exit code 0 [2022-02-11 00:32:34,852 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable306,299 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:32:34,852 INFO L402 AbstractCegarLoop]: === Iteration 308 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:32:34,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:32:34,853 INFO L85 PathProgramCache]: Analyzing trace with hash 416219507, now seen corresponding path program 299 times [2022-02-11 00:32:34,853 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:32:34,853 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [268696312] [2022-02-11 00:32:34,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:32:34,853 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:32:34,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:32:34,975 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:32:34,975 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:32:34,975 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [268696312] [2022-02-11 00:32:34,975 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [268696312] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:32:34,975 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2045159223] [2022-02-11 00:32:34,975 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-11 00:32:34,975 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:32:34,975 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:32:34,976 INFO L229 MonitoredProcess]: Starting monitored process 300 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:32:34,976 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (300)] Waiting until timeout for monitored process [2022-02-11 00:32:35,049 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-02-11 00:32:35,049 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:32:35,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-11 00:32:35,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:32:35,348 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 98 treesize of output 82 [2022-02-11 00:32:35,350 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 82 treesize of output 66 [2022-02-11 00:32:35,423 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:32:35,424 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:32:35,569 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:32:35,570 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 71 treesize of output 65 [2022-02-11 00:32:35,577 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:32:35,578 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 55 treesize of output 49 [2022-02-11 00:32:35,732 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:32:35,732 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2045159223] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:32:35,732 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:32:35,732 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-02-11 00:32:35,732 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1687964480] [2022-02-11 00:32:35,732 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:32:35,732 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-11 00:32:35,732 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:32:35,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-11 00:32:35,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=548, Unknown=0, NotChecked=0, Total=650 [2022-02-11 00:32:35,733 INFO L87 Difference]: Start difference. First operand 1013 states and 3018 transitions. Second operand has 26 states, 26 states have (on average 1.4615384615384615) internal successors, (38), 26 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) [2022-02-11 00:32:36,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:32:36,187 INFO L93 Difference]: Finished difference Result 1105 states and 3181 transitions. [2022-02-11 00:32:36,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-02-11 00:32:36,187 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.4615384615384615) internal successors, (38), 26 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 19 [2022-02-11 00:32:36,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:32:36,189 INFO L225 Difference]: With dead ends: 1105 [2022-02-11 00:32:36,189 INFO L226 Difference]: Without dead ends: 1105 [2022-02-11 00:32:36,189 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=185, Invalid=937, Unknown=0, NotChecked=0, Total=1122 [2022-02-11 00:32:36,189 INFO L934 BasicCegarLoop]: 19 mSDtfsCounter, 85 mSDsluCounter, 462 mSDsCounter, 0 mSdLazyCounter, 655 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 258 SdHoareTripleChecker+Invalid, 686 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 655 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-11 00:32:36,189 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [85 Valid, 258 Invalid, 686 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 655 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-11 00:32:36,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1105 states. [2022-02-11 00:32:36,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1105 to 1012. [2022-02-11 00:32:36,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1012 states, 1011 states have (on average 2.9821958456973294) internal successors, (3015), 1011 states have internal predecessors, (3015), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:32:36,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1012 states to 1012 states and 3015 transitions. [2022-02-11 00:32:36,201 INFO L78 Accepts]: Start accepts. Automaton has 1012 states and 3015 transitions. Word has length 19 [2022-02-11 00:32:36,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:32:36,201 INFO L470 AbstractCegarLoop]: Abstraction has 1012 states and 3015 transitions. [2022-02-11 00:32:36,201 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.4615384615384615) internal successors, (38), 26 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) [2022-02-11 00:32:36,201 INFO L276 IsEmpty]: Start isEmpty. Operand 1012 states and 3015 transitions. [2022-02-11 00:32:36,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-02-11 00:32:36,202 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:32:36,202 INFO L515 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:32:36,218 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (300)] Ended with exit code 0 [2022-02-11 00:32:36,409 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable307,300 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:32:36,410 INFO L402 AbstractCegarLoop]: === Iteration 309 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:32:36,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:32:36,410 INFO L85 PathProgramCache]: Analyzing trace with hash -928436437, now seen corresponding path program 300 times [2022-02-11 00:32:36,410 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:32:36,410 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [897837680] [2022-02-11 00:32:36,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:32:36,410 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:32:36,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:32:36,533 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:32:36,533 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:32:36,533 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [897837680] [2022-02-11 00:32:36,533 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [897837680] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:32:36,533 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1583101045] [2022-02-11 00:32:36,533 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-11 00:32:36,533 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:32:36,533 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:32:36,534 INFO L229 MonitoredProcess]: Starting monitored process 301 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:32:36,535 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (301)] Waiting until timeout for monitored process [2022-02-11 00:32:36,606 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-02-11 00:32:36,606 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:32:36,607 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-11 00:32:36,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:32:36,883 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 73 [2022-02-11 00:32:36,885 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 57 [2022-02-11 00:32:36,959 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:32:36,959 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:32:37,103 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:32:37,104 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 41 treesize of output 39 [2022-02-11 00:32:37,108 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:32:37,108 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 29 treesize of output 27 [2022-02-11 00:32:37,206 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:32:37,206 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1583101045] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:32:37,206 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:32:37,206 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-02-11 00:32:37,206 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1430837042] [2022-02-11 00:32:37,206 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:32:37,206 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-11 00:32:37,206 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:32:37,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-11 00:32:37,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=564, Unknown=0, NotChecked=0, Total=650 [2022-02-11 00:32:37,206 INFO L87 Difference]: Start difference. First operand 1012 states and 3015 transitions. Second operand has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 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) [2022-02-11 00:32:38,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:32:38,048 INFO L93 Difference]: Finished difference Result 1211 states and 3446 transitions. [2022-02-11 00:32:38,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-02-11 00:32:38,049 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 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 19 [2022-02-11 00:32:38,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:32:38,050 INFO L225 Difference]: With dead ends: 1211 [2022-02-11 00:32:38,050 INFO L226 Difference]: Without dead ends: 1209 [2022-02-11 00:32:38,051 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 394 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=278, Invalid=1614, Unknown=0, NotChecked=0, Total=1892 [2022-02-11 00:32:38,051 INFO L934 BasicCegarLoop]: 10 mSDtfsCounter, 127 mSDsluCounter, 294 mSDsCounter, 0 mSdLazyCounter, 615 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 663 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 615 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-11 00:32:38,051 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [127 Valid, 154 Invalid, 663 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 615 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-11 00:32:38,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1209 states. [2022-02-11 00:32:38,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1209 to 1025. [2022-02-11 00:32:38,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1025 states, 1024 states have (on average 2.982421875) internal successors, (3054), 1024 states have internal predecessors, (3054), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:32:38,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1025 states to 1025 states and 3054 transitions. [2022-02-11 00:32:38,062 INFO L78 Accepts]: Start accepts. Automaton has 1025 states and 3054 transitions. Word has length 19 [2022-02-11 00:32:38,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:32:38,063 INFO L470 AbstractCegarLoop]: Abstraction has 1025 states and 3054 transitions. [2022-02-11 00:32:38,063 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 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) [2022-02-11 00:32:38,063 INFO L276 IsEmpty]: Start isEmpty. Operand 1025 states and 3054 transitions. [2022-02-11 00:32:38,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-02-11 00:32:38,064 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:32:38,064 INFO L515 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:32:38,080 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (301)] Ended with exit code 0 [2022-02-11 00:32:38,264 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable308,301 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:32:38,264 INFO L402 AbstractCegarLoop]: === Iteration 310 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:32:38,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:32:38,264 INFO L85 PathProgramCache]: Analyzing trace with hash 1217734323, now seen corresponding path program 301 times [2022-02-11 00:32:38,264 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:32:38,264 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [257308785] [2022-02-11 00:32:38,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:32:38,265 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:32:38,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:32:38,390 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:32:38,391 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:32:38,391 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [257308785] [2022-02-11 00:32:38,391 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [257308785] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:32:38,391 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1528640135] [2022-02-11 00:32:38,391 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-11 00:32:38,391 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:32:38,391 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:32:38,392 INFO L229 MonitoredProcess]: Starting monitored process 302 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:32:38,392 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (302)] Waiting until timeout for monitored process [2022-02-11 00:32:38,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:32:38,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-11 00:32:38,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:32:38,762 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:32:38,762 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:32:38,939 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:32:38,939 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 42 treesize of output 40 [2022-02-11 00:32:38,944 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:32:38,944 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 30 treesize of output 28 [2022-02-11 00:32:39,046 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:32:39,046 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1528640135] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:32:39,046 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:32:39,046 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-02-11 00:32:39,047 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933641620] [2022-02-11 00:32:39,047 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:32:39,047 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-11 00:32:39,047 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:32:39,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-11 00:32:39,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=562, Unknown=0, NotChecked=0, Total=650 [2022-02-11 00:32:39,047 INFO L87 Difference]: Start difference. First operand 1025 states and 3054 transitions. Second operand has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 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) [2022-02-11 00:32:39,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:32:39,628 INFO L93 Difference]: Finished difference Result 1170 states and 3352 transitions. [2022-02-11 00:32:39,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-02-11 00:32:39,628 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 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 19 [2022-02-11 00:32:39,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:32:39,630 INFO L225 Difference]: With dead ends: 1170 [2022-02-11 00:32:39,630 INFO L226 Difference]: Without dead ends: 1170 [2022-02-11 00:32:39,630 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 304 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=198, Invalid=1284, Unknown=0, NotChecked=0, Total=1482 [2022-02-11 00:32:39,630 INFO L934 BasicCegarLoop]: 9 mSDtfsCounter, 77 mSDsluCounter, 226 mSDsCounter, 0 mSdLazyCounter, 533 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 555 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 533 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-11 00:32:39,630 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 112 Invalid, 555 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 533 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-11 00:32:39,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1170 states. [2022-02-11 00:32:39,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1170 to 1017. [2022-02-11 00:32:39,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1017 states, 1016 states have (on average 2.9803149606299213) internal successors, (3028), 1016 states have internal predecessors, (3028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:32:39,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1017 states to 1017 states and 3028 transitions. [2022-02-11 00:32:39,642 INFO L78 Accepts]: Start accepts. Automaton has 1017 states and 3028 transitions. Word has length 19 [2022-02-11 00:32:39,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:32:39,642 INFO L470 AbstractCegarLoop]: Abstraction has 1017 states and 3028 transitions. [2022-02-11 00:32:39,642 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 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) [2022-02-11 00:32:39,642 INFO L276 IsEmpty]: Start isEmpty. Operand 1017 states and 3028 transitions. [2022-02-11 00:32:39,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-02-11 00:32:39,643 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:32:39,643 INFO L515 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:32:39,659 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (302)] Forceful destruction successful, exit code 0 [2022-02-11 00:32:39,843 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 302 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable309 [2022-02-11 00:32:39,843 INFO L402 AbstractCegarLoop]: === Iteration 311 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:32:39,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:32:39,843 INFO L85 PathProgramCache]: Analyzing trace with hash -970448853, now seen corresponding path program 302 times [2022-02-11 00:32:39,844 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:32:39,844 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1167870704] [2022-02-11 00:32:39,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:32:39,844 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:32:39,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:32:39,970 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:32:39,970 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:32:39,970 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1167870704] [2022-02-11 00:32:39,970 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1167870704] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:32:39,970 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1721146377] [2022-02-11 00:32:39,970 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-11 00:32:39,970 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:32:39,970 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:32:39,971 INFO L229 MonitoredProcess]: Starting monitored process 303 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:32:39,972 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (303)] Waiting until timeout for monitored process [2022-02-11 00:32:40,045 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-11 00:32:40,045 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:32:40,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 33 conjunts are in the unsatisfiable core [2022-02-11 00:32:40,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:32:40,331 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:32:40,331 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:32:40,506 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:32:40,506 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 42 treesize of output 40 [2022-02-11 00:32:40,511 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:32:40,511 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 30 treesize of output 28 [2022-02-11 00:32:40,613 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:32:40,613 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1721146377] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:32:40,613 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:32:40,613 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-02-11 00:32:40,613 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [439630914] [2022-02-11 00:32:40,613 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:32:40,613 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-11 00:32:40,613 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:32:40,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-11 00:32:40,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=562, Unknown=0, NotChecked=0, Total=650 [2022-02-11 00:32:40,614 INFO L87 Difference]: Start difference. First operand 1017 states and 3028 transitions. Second operand has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 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) [2022-02-11 00:32:40,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:32:40,932 INFO L93 Difference]: Finished difference Result 1122 states and 3242 transitions. [2022-02-11 00:32:40,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-02-11 00:32:40,933 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 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 19 [2022-02-11 00:32:40,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:32:40,934 INFO L225 Difference]: With dead ends: 1122 [2022-02-11 00:32:40,934 INFO L226 Difference]: Without dead ends: 1122 [2022-02-11 00:32:40,934 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=92, Invalid=610, Unknown=0, NotChecked=0, Total=702 [2022-02-11 00:32:40,935 INFO L934 BasicCegarLoop]: 11 mSDtfsCounter, 50 mSDsluCounter, 363 mSDsCounter, 0 mSdLazyCounter, 765 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 170 SdHoareTripleChecker+Invalid, 772 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 765 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-11 00:32:40,935 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 170 Invalid, 772 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 765 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-11 00:32:40,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1122 states. [2022-02-11 00:32:40,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1122 to 1006. [2022-02-11 00:32:40,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1006 states, 1005 states have (on average 2.97910447761194) internal successors, (2994), 1005 states have internal predecessors, (2994), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:32:40,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1006 states to 1006 states and 2994 transitions. [2022-02-11 00:32:40,952 INFO L78 Accepts]: Start accepts. Automaton has 1006 states and 2994 transitions. Word has length 19 [2022-02-11 00:32:40,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:32:40,952 INFO L470 AbstractCegarLoop]: Abstraction has 1006 states and 2994 transitions. [2022-02-11 00:32:40,952 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 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) [2022-02-11 00:32:40,952 INFO L276 IsEmpty]: Start isEmpty. Operand 1006 states and 2994 transitions. [2022-02-11 00:32:40,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-02-11 00:32:40,953 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:32:40,953 INFO L515 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:32:40,969 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (303)] Ended with exit code 0 [2022-02-11 00:32:41,153 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 303 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable310 [2022-02-11 00:32:41,154 INFO L402 AbstractCegarLoop]: === Iteration 312 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:32:41,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:32:41,154 INFO L85 PathProgramCache]: Analyzing trace with hash 421056115, now seen corresponding path program 303 times [2022-02-11 00:32:41,154 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:32:41,154 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1998065722] [2022-02-11 00:32:41,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:32:41,154 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:32:41,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:32:41,303 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:32:41,304 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:32:41,304 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1998065722] [2022-02-11 00:32:41,304 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1998065722] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:32:41,304 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1457423536] [2022-02-11 00:32:41,304 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-11 00:32:41,304 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:32:41,304 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:32:41,305 INFO L229 MonitoredProcess]: Starting monitored process 304 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:32:41,305 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (304)] Waiting until timeout for monitored process [2022-02-11 00:32:41,379 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-02-11 00:32:41,379 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:32:41,380 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 32 conjunts are in the unsatisfiable core [2022-02-11 00:32:41,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:32:41,665 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:32:41,665 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:32:41,782 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:32:41,783 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 35 treesize of output 35 [2022-02-11 00:32:41,788 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:32:41,788 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 27 treesize of output 27 [2022-02-11 00:32:41,919 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:32:41,919 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1457423536] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:32:41,924 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:32:41,925 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 27 [2022-02-11 00:32:41,925 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2086201327] [2022-02-11 00:32:41,925 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:32:41,925 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-11 00:32:41,925 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:32:41,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-11 00:32:41,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=615, Unknown=0, NotChecked=0, Total=702 [2022-02-11 00:32:41,925 INFO L87 Difference]: Start difference. First operand 1006 states and 2994 transitions. Second operand has 27 states, 27 states have (on average 1.5185185185185186) internal successors, (41), 27 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) [2022-02-11 00:32:42,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:32:42,551 INFO L93 Difference]: Finished difference Result 1110 states and 3206 transitions. [2022-02-11 00:32:42,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-02-11 00:32:42,552 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.5185185185185186) internal successors, (41), 27 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 19 [2022-02-11 00:32:42,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:32:42,553 INFO L225 Difference]: With dead ends: 1110 [2022-02-11 00:32:42,553 INFO L226 Difference]: Without dead ends: 1110 [2022-02-11 00:32:42,553 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 266 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=175, Invalid=1157, Unknown=0, NotChecked=0, Total=1332 [2022-02-11 00:32:42,553 INFO L934 BasicCegarLoop]: 16 mSDtfsCounter, 81 mSDsluCounter, 475 mSDsCounter, 0 mSdLazyCounter, 1017 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 258 SdHoareTripleChecker+Invalid, 1044 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 1017 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-11 00:32:42,553 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 258 Invalid, 1044 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 1017 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-11 00:32:42,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1110 states. [2022-02-11 00:32:42,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1110 to 1011. [2022-02-11 00:32:42,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1011 states, 1010 states have (on average 2.977227722772277) internal successors, (3007), 1010 states have internal predecessors, (3007), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:32:42,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1011 states to 1011 states and 3007 transitions. [2022-02-11 00:32:42,565 INFO L78 Accepts]: Start accepts. Automaton has 1011 states and 3007 transitions. Word has length 19 [2022-02-11 00:32:42,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:32:42,565 INFO L470 AbstractCegarLoop]: Abstraction has 1011 states and 3007 transitions. [2022-02-11 00:32:42,565 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.5185185185185186) internal successors, (41), 27 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) [2022-02-11 00:32:42,565 INFO L276 IsEmpty]: Start isEmpty. Operand 1011 states and 3007 transitions. [2022-02-11 00:32:42,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-02-11 00:32:42,566 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:32:42,566 INFO L515 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:32:42,582 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (304)] Ended with exit code 0 [2022-02-11 00:32:42,766 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable311,304 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:32:42,766 INFO L402 AbstractCegarLoop]: === Iteration 313 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:32:42,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:32:42,766 INFO L85 PathProgramCache]: Analyzing trace with hash -1727740421, now seen corresponding path program 304 times [2022-02-11 00:32:42,766 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:32:42,766 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [818991583] [2022-02-11 00:32:42,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:32:42,767 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:32:42,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:32:42,931 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:32:42,931 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:32:42,931 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [818991583] [2022-02-11 00:32:42,931 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [818991583] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:32:42,932 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [616033924] [2022-02-11 00:32:42,932 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-11 00:32:42,932 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:32:42,932 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:32:42,933 INFO L229 MonitoredProcess]: Starting monitored process 305 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:32:42,933 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (305)] Waiting until timeout for monitored process [2022-02-11 00:32:43,002 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-11 00:32:43,002 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:32:43,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-11 00:32:43,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:32:43,256 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 73 [2022-02-11 00:32:43,258 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 57 [2022-02-11 00:32:43,330 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:32:43,330 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:32:43,481 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:32:43,482 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 34 treesize of output 34 [2022-02-11 00:32:43,486 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:32:43,486 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 26 treesize of output 26 [2022-02-11 00:32:43,616 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:32:43,616 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [616033924] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:32:43,616 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:32:43,616 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-02-11 00:32:43,616 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1025573015] [2022-02-11 00:32:43,616 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:32:43,616 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-11 00:32:43,616 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:32:43,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-11 00:32:43,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=563, Unknown=0, NotChecked=0, Total=650 [2022-02-11 00:32:43,617 INFO L87 Difference]: Start difference. First operand 1011 states and 3007 transitions. Second operand has 26 states, 26 states have (on average 1.4615384615384615) internal successors, (38), 26 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) [2022-02-11 00:32:44,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:32:44,173 INFO L93 Difference]: Finished difference Result 1147 states and 3267 transitions. [2022-02-11 00:32:44,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-02-11 00:32:44,173 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.4615384615384615) internal successors, (38), 26 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 19 [2022-02-11 00:32:44,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:32:44,175 INFO L225 Difference]: With dead ends: 1147 [2022-02-11 00:32:44,175 INFO L226 Difference]: Without dead ends: 1144 [2022-02-11 00:32:44,175 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 251 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=186, Invalid=1074, Unknown=0, NotChecked=0, Total=1260 [2022-02-11 00:32:44,175 INFO L934 BasicCegarLoop]: 19 mSDtfsCounter, 129 mSDsluCounter, 398 mSDsCounter, 0 mSdLazyCounter, 810 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 246 SdHoareTripleChecker+Invalid, 857 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 810 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-11 00:32:44,175 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [129 Valid, 246 Invalid, 857 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 810 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-11 00:32:44,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1144 states. [2022-02-11 00:32:44,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1144 to 1013. [2022-02-11 00:32:44,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1013 states, 1012 states have (on average 2.9782608695652173) internal successors, (3014), 1012 states have internal predecessors, (3014), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:32:44,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1013 states to 1013 states and 3014 transitions. [2022-02-11 00:32:44,188 INFO L78 Accepts]: Start accepts. Automaton has 1013 states and 3014 transitions. Word has length 19 [2022-02-11 00:32:44,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:32:44,188 INFO L470 AbstractCegarLoop]: Abstraction has 1013 states and 3014 transitions. [2022-02-11 00:32:44,188 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.4615384615384615) internal successors, (38), 26 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) [2022-02-11 00:32:44,188 INFO L276 IsEmpty]: Start isEmpty. Operand 1013 states and 3014 transitions. [2022-02-11 00:32:44,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-02-11 00:32:44,190 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:32:44,190 INFO L515 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:32:44,206 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (305)] Ended with exit code 0 [2022-02-11 00:32:44,390 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 305 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable312 [2022-02-11 00:32:44,390 INFO L402 AbstractCegarLoop]: === Iteration 314 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:32:44,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:32:44,391 INFO L85 PathProgramCache]: Analyzing trace with hash 1222570931, now seen corresponding path program 305 times [2022-02-11 00:32:44,391 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:32:44,391 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1662881030] [2022-02-11 00:32:44,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:32:44,391 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:32:44,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:32:44,535 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:32:44,536 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:32:44,536 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1662881030] [2022-02-11 00:32:44,536 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1662881030] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:32:44,536 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [719466212] [2022-02-11 00:32:44,536 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-11 00:32:44,536 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:32:44,536 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:32:44,537 INFO L229 MonitoredProcess]: Starting monitored process 306 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:32:44,537 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (306)] Waiting until timeout for monitored process [2022-02-11 00:32:44,609 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-02-11 00:32:44,609 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:32:44,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-11 00:32:44,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:32:44,874 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 98 treesize of output 82 [2022-02-11 00:32:44,876 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 82 treesize of output 66 [2022-02-11 00:32:44,962 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:32:44,962 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:32:45,062 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:32:45,062 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 65 treesize of output 61 [2022-02-11 00:32:45,068 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:32:45,068 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 53 treesize of output 49 [2022-02-11 00:32:45,260 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:32:45,260 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [719466212] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:32:45,260 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:32:45,260 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-02-11 00:32:45,260 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [514339757] [2022-02-11 00:32:45,260 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:32:45,260 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-11 00:32:45,260 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:32:45,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-11 00:32:45,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=561, Unknown=0, NotChecked=0, Total=650 [2022-02-11 00:32:45,260 INFO L87 Difference]: Start difference. First operand 1013 states and 3014 transitions. Second operand has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 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) [2022-02-11 00:32:45,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:32:45,722 INFO L93 Difference]: Finished difference Result 1072 states and 3118 transitions. [2022-02-11 00:32:45,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-02-11 00:32:45,722 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 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 19 [2022-02-11 00:32:45,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:32:45,724 INFO L225 Difference]: With dead ends: 1072 [2022-02-11 00:32:45,724 INFO L226 Difference]: Without dead ends: 1064 [2022-02-11 00:32:45,724 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=156, Invalid=966, Unknown=0, NotChecked=0, Total=1122 [2022-02-11 00:32:45,724 INFO L934 BasicCegarLoop]: 12 mSDtfsCounter, 93 mSDsluCounter, 294 mSDsCounter, 0 mSdLazyCounter, 684 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 164 SdHoareTripleChecker+Invalid, 729 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 684 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-11 00:32:45,724 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [93 Valid, 164 Invalid, 729 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 684 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-11 00:32:45,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1064 states. [2022-02-11 00:32:45,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1064 to 1003. [2022-02-11 00:32:45,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1003 states, 1002 states have (on average 2.974051896207585) internal successors, (2980), 1002 states have internal predecessors, (2980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:32:45,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1003 states to 1003 states and 2980 transitions. [2022-02-11 00:32:45,735 INFO L78 Accepts]: Start accepts. Automaton has 1003 states and 2980 transitions. Word has length 19 [2022-02-11 00:32:45,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:32:45,735 INFO L470 AbstractCegarLoop]: Abstraction has 1003 states and 2980 transitions. [2022-02-11 00:32:45,735 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 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) [2022-02-11 00:32:45,735 INFO L276 IsEmpty]: Start isEmpty. Operand 1003 states and 2980 transitions. [2022-02-11 00:32:45,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-02-11 00:32:45,736 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:32:45,736 INFO L515 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:32:45,752 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (306)] Ended with exit code 0 [2022-02-11 00:32:45,936 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 306 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable313 [2022-02-11 00:32:45,936 INFO L402 AbstractCegarLoop]: === Iteration 315 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:32:45,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:32:45,937 INFO L85 PathProgramCache]: Analyzing trace with hash -965612245, now seen corresponding path program 306 times [2022-02-11 00:32:45,937 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:32:45,937 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1603152038] [2022-02-11 00:32:45,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:32:45,937 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:32:45,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:32:46,091 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:32:46,091 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:32:46,091 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1603152038] [2022-02-11 00:32:46,091 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1603152038] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:32:46,091 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1710478558] [2022-02-11 00:32:46,091 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-11 00:32:46,091 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:32:46,091 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:32:46,092 INFO L229 MonitoredProcess]: Starting monitored process 307 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:32:46,092 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (307)] Waiting until timeout for monitored process [2022-02-11 00:32:46,165 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-02-11 00:32:46,166 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:32:46,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-11 00:32:46,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:32:46,439 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 87 treesize of output 71 [2022-02-11 00:32:46,441 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 55 [2022-02-11 00:32:46,513 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:32:46,513 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:32:46,662 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:32:46,662 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 34 treesize of output 34 [2022-02-11 00:32:46,667 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:32:46,668 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 26 treesize of output 26 [2022-02-11 00:32:46,809 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:32:46,809 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1710478558] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:32:46,809 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:32:46,809 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-02-11 00:32:46,809 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [152471416] [2022-02-11 00:32:46,810 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:32:46,810 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-11 00:32:46,810 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:32:46,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-11 00:32:46,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=569, Unknown=0, NotChecked=0, Total=650 [2022-02-11 00:32:46,810 INFO L87 Difference]: Start difference. First operand 1003 states and 2980 transitions. Second operand has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 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) [2022-02-11 00:32:47,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:32:47,852 INFO L93 Difference]: Finished difference Result 1195 states and 3381 transitions. [2022-02-11 00:32:47,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-02-11 00:32:47,853 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 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 19 [2022-02-11 00:32:47,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:32:47,854 INFO L225 Difference]: With dead ends: 1195 [2022-02-11 00:32:47,854 INFO L226 Difference]: Without dead ends: 1193 [2022-02-11 00:32:47,855 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 549 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=317, Invalid=2133, Unknown=0, NotChecked=0, Total=2450 [2022-02-11 00:32:47,855 INFO L934 BasicCegarLoop]: 14 mSDtfsCounter, 181 mSDsluCounter, 352 mSDsCounter, 0 mSdLazyCounter, 698 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 181 SdHoareTripleChecker+Valid, 202 SdHoareTripleChecker+Invalid, 762 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 698 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-11 00:32:47,855 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [181 Valid, 202 Invalid, 762 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 698 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-11 00:32:47,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1193 states. [2022-02-11 00:32:47,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1193 to 1011. [2022-02-11 00:32:47,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1011 states, 1010 states have (on average 2.979207920792079) internal successors, (3009), 1010 states have internal predecessors, (3009), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:32:47,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1011 states to 1011 states and 3009 transitions. [2022-02-11 00:32:47,866 INFO L78 Accepts]: Start accepts. Automaton has 1011 states and 3009 transitions. Word has length 19 [2022-02-11 00:32:47,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:32:47,866 INFO L470 AbstractCegarLoop]: Abstraction has 1011 states and 3009 transitions. [2022-02-11 00:32:47,867 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 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) [2022-02-11 00:32:47,867 INFO L276 IsEmpty]: Start isEmpty. Operand 1011 states and 3009 transitions. [2022-02-11 00:32:47,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-02-11 00:32:47,868 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:32:47,868 INFO L515 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:32:47,891 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (307)] Ended with exit code 0 [2022-02-11 00:32:48,068 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 307 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable314 [2022-02-11 00:32:48,068 INFO L402 AbstractCegarLoop]: === Iteration 316 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:32:48,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:32:48,068 INFO L85 PathProgramCache]: Analyzing trace with hash 1180558515, now seen corresponding path program 307 times [2022-02-11 00:32:48,068 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:32:48,068 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2088735124] [2022-02-11 00:32:48,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:32:48,069 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:32:48,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:32:48,219 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:32:48,219 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:32:48,219 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2088735124] [2022-02-11 00:32:48,220 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2088735124] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:32:48,220 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1049236826] [2022-02-11 00:32:48,220 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-11 00:32:48,220 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:32:48,220 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:32:48,221 INFO L229 MonitoredProcess]: Starting monitored process 308 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:32:48,221 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (308)] Waiting until timeout for monitored process [2022-02-11 00:32:48,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:32:48,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-11 00:32:48,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:32:48,571 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:32:48,571 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:32:48,691 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:32:48,692 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 34 treesize of output 34 [2022-02-11 00:32:48,696 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:32:48,697 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 26 treesize of output 26 [2022-02-11 00:32:48,837 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:32:48,837 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1049236826] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:32:48,838 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:32:48,838 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-02-11 00:32:48,838 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [254150009] [2022-02-11 00:32:48,838 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:32:48,838 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-11 00:32:48,838 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:32:48,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-11 00:32:48,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=567, Unknown=0, NotChecked=0, Total=650 [2022-02-11 00:32:48,838 INFO L87 Difference]: Start difference. First operand 1011 states and 3009 transitions. Second operand has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 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) [2022-02-11 00:32:49,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:32:49,479 INFO L93 Difference]: Finished difference Result 1134 states and 3256 transitions. [2022-02-11 00:32:49,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-02-11 00:32:49,479 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 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 19 [2022-02-11 00:32:49,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:32:49,481 INFO L225 Difference]: With dead ends: 1134 [2022-02-11 00:32:49,481 INFO L226 Difference]: Without dead ends: 1134 [2022-02-11 00:32:49,481 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 311 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=205, Invalid=1355, Unknown=0, NotChecked=0, Total=1560 [2022-02-11 00:32:49,481 INFO L934 BasicCegarLoop]: 15 mSDtfsCounter, 109 mSDsluCounter, 302 mSDsCounter, 0 mSdLazyCounter, 564 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 173 SdHoareTripleChecker+Invalid, 605 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 564 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-11 00:32:49,481 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [109 Valid, 173 Invalid, 605 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 564 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-11 00:32:49,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1134 states. [2022-02-11 00:32:49,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1134 to 1005. [2022-02-11 00:32:49,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1005 states, 1004 states have (on average 2.9780876494023905) internal successors, (2990), 1004 states have internal predecessors, (2990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:32:49,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1005 states to 1005 states and 2990 transitions. [2022-02-11 00:32:49,497 INFO L78 Accepts]: Start accepts. Automaton has 1005 states and 2990 transitions. Word has length 19 [2022-02-11 00:32:49,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:32:49,497 INFO L470 AbstractCegarLoop]: Abstraction has 1005 states and 2990 transitions. [2022-02-11 00:32:49,497 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 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) [2022-02-11 00:32:49,497 INFO L276 IsEmpty]: Start isEmpty. Operand 1005 states and 2990 transitions. [2022-02-11 00:32:49,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-02-11 00:32:49,498 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:32:49,498 INFO L515 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:32:49,515 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (308)] Ended with exit code 0 [2022-02-11 00:32:49,699 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 308 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable315 [2022-02-11 00:32:49,699 INFO L402 AbstractCegarLoop]: === Iteration 317 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:32:49,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:32:49,699 INFO L85 PathProgramCache]: Analyzing trace with hash -79813965, now seen corresponding path program 308 times [2022-02-11 00:32:49,700 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:32:49,700 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [876159718] [2022-02-11 00:32:49,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:32:49,700 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:32:49,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:32:49,857 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:32:49,857 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:32:49,857 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [876159718] [2022-02-11 00:32:49,857 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [876159718] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:32:49,857 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1754264966] [2022-02-11 00:32:49,857 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-11 00:32:49,857 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:32:49,857 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:32:49,858 INFO L229 MonitoredProcess]: Starting monitored process 309 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:32:49,859 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (309)] Waiting until timeout for monitored process [2022-02-11 00:32:49,930 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-11 00:32:49,930 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:32:49,930 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-11 00:32:49,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:32:50,196 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 87 treesize of output 71 [2022-02-11 00:32:50,198 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 55 [2022-02-11 00:32:50,273 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:32:50,274 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:32:50,434 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:32:50,434 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 41 treesize of output 39 [2022-02-11 00:32:50,439 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:32:50,439 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 29 treesize of output 27 [2022-02-11 00:32:50,541 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:32:50,542 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1754264966] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:32:50,542 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:32:50,542 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-02-11 00:32:50,542 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1509443362] [2022-02-11 00:32:50,542 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:32:50,542 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-11 00:32:50,542 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:32:50,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-11 00:32:50,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=568, Unknown=0, NotChecked=0, Total=650 [2022-02-11 00:32:50,542 INFO L87 Difference]: Start difference. First operand 1005 states and 2990 transitions. Second operand has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 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) [2022-02-11 00:32:51,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:32:51,213 INFO L93 Difference]: Finished difference Result 1114 states and 3233 transitions. [2022-02-11 00:32:51,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-02-11 00:32:51,214 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 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 19 [2022-02-11 00:32:51,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:32:51,215 INFO L225 Difference]: With dead ends: 1114 [2022-02-11 00:32:51,215 INFO L226 Difference]: Without dead ends: 1112 [2022-02-11 00:32:51,215 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 260 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=184, Invalid=1148, Unknown=0, NotChecked=0, Total=1332 [2022-02-11 00:32:51,216 INFO L934 BasicCegarLoop]: 12 mSDtfsCounter, 106 mSDsluCounter, 365 mSDsCounter, 0 mSdLazyCounter, 724 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 194 SdHoareTripleChecker+Invalid, 765 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 724 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-11 00:32:51,216 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [106 Valid, 194 Invalid, 765 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 724 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-11 00:32:51,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1112 states. [2022-02-11 00:32:51,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1112 to 1016. [2022-02-11 00:32:51,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1016 states, 1015 states have (on average 2.9783251231527093) internal successors, (3023), 1015 states have internal predecessors, (3023), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:32:51,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1016 states to 1016 states and 3023 transitions. [2022-02-11 00:32:51,227 INFO L78 Accepts]: Start accepts. Automaton has 1016 states and 3023 transitions. Word has length 19 [2022-02-11 00:32:51,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:32:51,227 INFO L470 AbstractCegarLoop]: Abstraction has 1016 states and 3023 transitions. [2022-02-11 00:32:51,228 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 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) [2022-02-11 00:32:51,228 INFO L276 IsEmpty]: Start isEmpty. Operand 1016 states and 3023 transitions. [2022-02-11 00:32:51,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-02-11 00:32:51,229 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:32:51,229 INFO L515 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:32:51,245 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (309)] Ended with exit code 0 [2022-02-11 00:32:51,429 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable316,309 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:32:51,429 INFO L402 AbstractCegarLoop]: === Iteration 318 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:32:51,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:32:51,430 INFO L85 PathProgramCache]: Analyzing trace with hash 2066356795, now seen corresponding path program 309 times [2022-02-11 00:32:51,430 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:32:51,430 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [966358256] [2022-02-11 00:32:51,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:32:51,430 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:32:51,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:32:51,565 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:32:51,565 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:32:51,565 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [966358256] [2022-02-11 00:32:51,566 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [966358256] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:32:51,566 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1581558874] [2022-02-11 00:32:51,566 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-11 00:32:51,566 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:32:51,566 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:32:51,567 INFO L229 MonitoredProcess]: Starting monitored process 310 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:32:51,567 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (310)] Waiting until timeout for monitored process [2022-02-11 00:32:51,641 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-02-11 00:32:51,641 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:32:51,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-11 00:32:51,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:32:51,944 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:32:51,944 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:32:52,105 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:32:52,105 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 42 treesize of output 40 [2022-02-11 00:32:52,111 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:32:52,111 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 30 treesize of output 28 [2022-02-11 00:32:52,226 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:32:52,227 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1581558874] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:32:52,227 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:32:52,227 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-02-11 00:32:52,227 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373304069] [2022-02-11 00:32:52,227 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:32:52,227 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-11 00:32:52,227 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:32:52,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-11 00:32:52,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=569, Unknown=0, NotChecked=0, Total=650 [2022-02-11 00:32:52,228 INFO L87 Difference]: Start difference. First operand 1016 states and 3023 transitions. Second operand has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 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) [2022-02-11 00:32:52,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:32:52,832 INFO L93 Difference]: Finished difference Result 1081 states and 3154 transitions. [2022-02-11 00:32:52,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-02-11 00:32:52,833 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 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 19 [2022-02-11 00:32:52,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:32:52,834 INFO L225 Difference]: With dead ends: 1081 [2022-02-11 00:32:52,835 INFO L226 Difference]: Without dead ends: 1081 [2022-02-11 00:32:52,835 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=168, Invalid=1092, Unknown=0, NotChecked=0, Total=1260 [2022-02-11 00:32:52,835 INFO L934 BasicCegarLoop]: 9 mSDtfsCounter, 60 mSDsluCounter, 323 mSDsCounter, 0 mSdLazyCounter, 623 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 157 SdHoareTripleChecker+Invalid, 642 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 623 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-11 00:32:52,835 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 157 Invalid, 642 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 623 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-11 00:32:52,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1081 states. [2022-02-11 00:32:52,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1081 to 1015. [2022-02-11 00:32:52,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1015 states, 1014 states have (on average 2.9773175542406314) internal successors, (3019), 1014 states have internal predecessors, (3019), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:32:52,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1015 states to 1015 states and 3019 transitions. [2022-02-11 00:32:52,856 INFO L78 Accepts]: Start accepts. Automaton has 1015 states and 3019 transitions. Word has length 19 [2022-02-11 00:32:52,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:32:52,856 INFO L470 AbstractCegarLoop]: Abstraction has 1015 states and 3019 transitions. [2022-02-11 00:32:52,856 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 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) [2022-02-11 00:32:52,856 INFO L276 IsEmpty]: Start isEmpty. Operand 1015 states and 3019 transitions. [2022-02-11 00:32:52,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-02-11 00:32:52,858 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:32:52,858 INFO L515 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:32:52,874 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (310)] Ended with exit code 0 [2022-02-11 00:32:53,058 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable317,310 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:32:53,058 INFO L402 AbstractCegarLoop]: === Iteration 319 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:32:53,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:32:53,059 INFO L85 PathProgramCache]: Analyzing trace with hash -121826381, now seen corresponding path program 310 times [2022-02-11 00:32:53,059 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:32:53,059 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1401614424] [2022-02-11 00:32:53,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:32:53,059 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:32:53,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:32:53,199 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:32:53,199 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:32:53,199 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1401614424] [2022-02-11 00:32:53,199 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1401614424] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:32:53,200 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2104873797] [2022-02-11 00:32:53,200 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-11 00:32:53,200 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:32:53,200 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:32:53,201 INFO L229 MonitoredProcess]: Starting monitored process 311 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:32:53,201 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (311)] Waiting until timeout for monitored process [2022-02-11 00:32:53,277 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-11 00:32:53,278 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:32:53,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-11 00:32:53,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:32:53,574 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:32:53,574 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:32:53,748 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:32:53,748 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 42 treesize of output 40 [2022-02-11 00:32:53,754 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:32:53,754 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 30 treesize of output 28 [2022-02-11 00:32:53,888 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:32:53,889 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2104873797] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:32:53,889 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:32:53,889 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-02-11 00:32:53,889 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [521551000] [2022-02-11 00:32:53,889 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:32:53,889 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-11 00:32:53,889 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:32:53,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-11 00:32:53,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=566, Unknown=0, NotChecked=0, Total=650 [2022-02-11 00:32:53,890 INFO L87 Difference]: Start difference. First operand 1015 states and 3019 transitions. Second operand has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 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) [2022-02-11 00:32:54,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:32:54,232 INFO L93 Difference]: Finished difference Result 1079 states and 3146 transitions. [2022-02-11 00:32:54,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-02-11 00:32:54,232 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 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 19 [2022-02-11 00:32:54,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:32:54,234 INFO L225 Difference]: With dead ends: 1079 [2022-02-11 00:32:54,234 INFO L226 Difference]: Without dead ends: 1079 [2022-02-11 00:32:54,234 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=97, Invalid=659, Unknown=0, NotChecked=0, Total=756 [2022-02-11 00:32:54,234 INFO L934 BasicCegarLoop]: 11 mSDtfsCounter, 56 mSDsluCounter, 278 mSDsCounter, 0 mSdLazyCounter, 556 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 564 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 556 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-11 00:32:54,234 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 133 Invalid, 564 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 556 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-11 00:32:54,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1079 states. [2022-02-11 00:32:54,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1079 to 1007. [2022-02-11 00:32:54,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1007 states, 1006 states have (on average 2.9761431411530817) internal successors, (2994), 1006 states have internal predecessors, (2994), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:32:54,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1007 states to 1007 states and 2994 transitions. [2022-02-11 00:32:54,247 INFO L78 Accepts]: Start accepts. Automaton has 1007 states and 2994 transitions. Word has length 19 [2022-02-11 00:32:54,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:32:54,247 INFO L470 AbstractCegarLoop]: Abstraction has 1007 states and 2994 transitions. [2022-02-11 00:32:54,247 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 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) [2022-02-11 00:32:54,247 INFO L276 IsEmpty]: Start isEmpty. Operand 1007 states and 2994 transitions. [2022-02-11 00:32:54,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-02-11 00:32:54,248 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:32:54,248 INFO L515 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:32:54,267 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (311)] Ended with exit code 0 [2022-02-11 00:32:54,448 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable318,311 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:32:54,449 INFO L402 AbstractCegarLoop]: === Iteration 320 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:32:54,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:32:54,449 INFO L85 PathProgramCache]: Analyzing trace with hash -1340182413, now seen corresponding path program 311 times [2022-02-11 00:32:54,449 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:32:54,449 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1422190790] [2022-02-11 00:32:54,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:32:54,449 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:32:54,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:32:54,593 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:32:54,593 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:32:54,593 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1422190790] [2022-02-11 00:32:54,593 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1422190790] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:32:54,593 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [100950174] [2022-02-11 00:32:54,593 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-11 00:32:54,593 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:32:54,593 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:32:54,594 INFO L229 MonitoredProcess]: Starting monitored process 312 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:32:54,595 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (312)] Waiting until timeout for monitored process [2022-02-11 00:32:54,676 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-02-11 00:32:54,677 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:32:54,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-11 00:32:54,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:32:55,035 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 98 treesize of output 82 [2022-02-11 00:32:55,037 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 82 treesize of output 66 [2022-02-11 00:32:55,112 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:32:55,112 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:32:55,272 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:32:55,272 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 71 treesize of output 65 [2022-02-11 00:32:55,280 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:32:55,280 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 55 treesize of output 49 [2022-02-11 00:32:55,438 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:32:55,438 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [100950174] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:32:55,438 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:32:55,438 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 27 [2022-02-11 00:32:55,438 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1199351491] [2022-02-11 00:32:55,438 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:32:55,438 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-11 00:32:55,438 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:32:55,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-11 00:32:55,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=606, Unknown=0, NotChecked=0, Total=702 [2022-02-11 00:32:55,439 INFO L87 Difference]: Start difference. First operand 1007 states and 2994 transitions. Second operand has 27 states, 27 states have (on average 1.4444444444444444) internal successors, (39), 27 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) [2022-02-11 00:32:55,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:32:55,996 INFO L93 Difference]: Finished difference Result 1118 states and 3182 transitions. [2022-02-11 00:32:55,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-02-11 00:32:55,996 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.4444444444444444) internal successors, (39), 27 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 19 [2022-02-11 00:32:55,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:32:55,998 INFO L225 Difference]: With dead ends: 1118 [2022-02-11 00:32:55,998 INFO L226 Difference]: Without dead ends: 1118 [2022-02-11 00:32:55,998 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=146, Invalid=976, Unknown=0, NotChecked=0, Total=1122 [2022-02-11 00:32:55,998 INFO L934 BasicCegarLoop]: 17 mSDtfsCounter, 134 mSDsluCounter, 501 mSDsCounter, 0 mSdLazyCounter, 784 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 288 SdHoareTripleChecker+Invalid, 810 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 784 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-11 00:32:55,998 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [134 Valid, 288 Invalid, 810 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 784 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-11 00:32:55,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1118 states. [2022-02-11 00:32:56,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1118 to 1013. [2022-02-11 00:32:56,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1013 states, 1012 states have (on average 2.974308300395257) internal successors, (3010), 1012 states have internal predecessors, (3010), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:32:56,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1013 states to 1013 states and 3010 transitions. [2022-02-11 00:32:56,014 INFO L78 Accepts]: Start accepts. Automaton has 1013 states and 3010 transitions. Word has length 19 [2022-02-11 00:32:56,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:32:56,014 INFO L470 AbstractCegarLoop]: Abstraction has 1013 states and 3010 transitions. [2022-02-11 00:32:56,014 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.4444444444444444) internal successors, (39), 27 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) [2022-02-11 00:32:56,014 INFO L276 IsEmpty]: Start isEmpty. Operand 1013 states and 3010 transitions. [2022-02-11 00:32:56,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-02-11 00:32:56,015 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:32:56,015 INFO L515 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:32:56,032 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (312)] Forceful destruction successful, exit code 0 [2022-02-11 00:32:56,216 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 312 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable319 [2022-02-11 00:32:56,216 INFO L402 AbstractCegarLoop]: === Iteration 321 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:32:56,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:32:56,216 INFO L85 PathProgramCache]: Analyzing trace with hash 1610128939, now seen corresponding path program 312 times [2022-02-11 00:32:56,216 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:32:56,216 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [324375349] [2022-02-11 00:32:56,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:32:56,216 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:32:56,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:32:56,339 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:32:56,340 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:32:56,340 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [324375349] [2022-02-11 00:32:56,340 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [324375349] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:32:56,340 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [442501419] [2022-02-11 00:32:56,340 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-11 00:32:56,340 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:32:56,340 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:32:56,341 INFO L229 MonitoredProcess]: Starting monitored process 313 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:32:56,341 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (313)] Waiting until timeout for monitored process [2022-02-11 00:32:56,414 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-02-11 00:32:56,414 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:32:56,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 32 conjunts are in the unsatisfiable core [2022-02-11 00:32:56,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:32:56,712 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 87 treesize of output 71 [2022-02-11 00:32:56,714 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 55 [2022-02-11 00:32:56,805 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:32:56,805 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:32:56,991 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:32:56,991 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 43 treesize of output 41 [2022-02-11 00:32:56,996 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:32:56,997 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 31 treesize of output 29 [2022-02-11 00:32:57,093 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:32:57,093 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [442501419] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:32:57,093 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:32:57,093 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 28 [2022-02-11 00:32:57,093 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [825547563] [2022-02-11 00:32:57,093 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:32:57,093 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-02-11 00:32:57,093 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:32:57,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-02-11 00:32:57,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=676, Unknown=0, NotChecked=0, Total=756 [2022-02-11 00:32:57,093 INFO L87 Difference]: Start difference. First operand 1013 states and 3010 transitions. Second operand has 28 states, 28 states have (on average 1.4285714285714286) internal successors, (40), 28 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) [2022-02-11 00:32:58,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:32:58,214 INFO L93 Difference]: Finished difference Result 1131 states and 3250 transitions. [2022-02-11 00:32:58,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-02-11 00:32:58,214 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.4285714285714286) internal successors, (40), 28 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 19 [2022-02-11 00:32:58,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:32:58,216 INFO L225 Difference]: With dead ends: 1131 [2022-02-11 00:32:58,216 INFO L226 Difference]: Without dead ends: 1129 [2022-02-11 00:32:58,216 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 356 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=270, Invalid=1986, Unknown=0, NotChecked=0, Total=2256 [2022-02-11 00:32:58,216 INFO L934 BasicCegarLoop]: 15 mSDtfsCounter, 160 mSDsluCounter, 478 mSDsCounter, 0 mSdLazyCounter, 1101 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 250 SdHoareTripleChecker+Invalid, 1166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 1101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-11 00:32:58,216 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [160 Valid, 250 Invalid, 1166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 1101 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-11 00:32:58,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1129 states. [2022-02-11 00:32:58,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1129 to 1020. [2022-02-11 00:32:58,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1020 states, 1019 states have (on average 2.9754661432777234) internal successors, (3032), 1019 states have internal predecessors, (3032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:32:58,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1020 states to 1020 states and 3032 transitions. [2022-02-11 00:32:58,234 INFO L78 Accepts]: Start accepts. Automaton has 1020 states and 3032 transitions. Word has length 19 [2022-02-11 00:32:58,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:32:58,234 INFO L470 AbstractCegarLoop]: Abstraction has 1020 states and 3032 transitions. [2022-02-11 00:32:58,234 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.4285714285714286) internal successors, (40), 28 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) [2022-02-11 00:32:58,234 INFO L276 IsEmpty]: Start isEmpty. Operand 1020 states and 3032 transitions. [2022-02-11 00:32:58,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-02-11 00:32:58,235 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:32:58,235 INFO L515 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:32:58,251 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (313)] Ended with exit code 0 [2022-02-11 00:32:58,436 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable320,313 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:32:58,436 INFO L402 AbstractCegarLoop]: === Iteration 322 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:32:58,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:32:58,436 INFO L85 PathProgramCache]: Analyzing trace with hash -538667597, now seen corresponding path program 313 times [2022-02-11 00:32:58,436 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:32:58,436 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [321456804] [2022-02-11 00:32:58,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:32:58,436 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:32:58,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:32:58,566 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:32:58,566 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:32:58,566 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [321456804] [2022-02-11 00:32:58,566 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [321456804] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:32:58,566 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1069305778] [2022-02-11 00:32:58,566 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-11 00:32:58,566 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:32:58,566 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:32:58,567 INFO L229 MonitoredProcess]: Starting monitored process 314 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:32:58,567 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (314)] Waiting until timeout for monitored process [2022-02-11 00:32:58,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:32:58,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-11 00:32:58,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:32:58,963 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:32:58,963 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:32:59,149 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:32:59,149 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 42 treesize of output 40 [2022-02-11 00:32:59,154 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:32:59,154 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 30 treesize of output 28 [2022-02-11 00:32:59,256 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:32:59,256 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1069305778] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:32:59,256 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:32:59,256 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 27 [2022-02-11 00:32:59,256 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106361967] [2022-02-11 00:32:59,256 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:32:59,257 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-11 00:32:59,257 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:32:59,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-11 00:32:59,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=626, Unknown=0, NotChecked=0, Total=702 [2022-02-11 00:32:59,257 INFO L87 Difference]: Start difference. First operand 1020 states and 3032 transitions. Second operand has 27 states, 27 states have (on average 1.4074074074074074) internal successors, (38), 27 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) [2022-02-11 00:33:00,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:33:00,194 INFO L93 Difference]: Finished difference Result 1118 states and 3229 transitions. [2022-02-11 00:33:00,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-02-11 00:33:00,194 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.4074074074074074) internal successors, (38), 27 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 19 [2022-02-11 00:33:00,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:33:00,196 INFO L225 Difference]: With dead ends: 1118 [2022-02-11 00:33:00,196 INFO L226 Difference]: Without dead ends: 1118 [2022-02-11 00:33:00,196 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 285 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=222, Invalid=1670, Unknown=0, NotChecked=0, Total=1892 [2022-02-11 00:33:00,196 INFO L934 BasicCegarLoop]: 12 mSDtfsCounter, 129 mSDsluCounter, 388 mSDsCounter, 0 mSdLazyCounter, 906 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 195 SdHoareTripleChecker+Invalid, 952 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 906 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-11 00:33:00,196 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [129 Valid, 195 Invalid, 952 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 906 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-11 00:33:00,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1118 states. [2022-02-11 00:33:00,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1118 to 1019. [2022-02-11 00:33:00,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1019 states, 1018 states have (on average 2.975442043222004) internal successors, (3029), 1018 states have internal predecessors, (3029), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:33:00,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1019 states to 1019 states and 3029 transitions. [2022-02-11 00:33:00,208 INFO L78 Accepts]: Start accepts. Automaton has 1019 states and 3029 transitions. Word has length 19 [2022-02-11 00:33:00,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:33:00,208 INFO L470 AbstractCegarLoop]: Abstraction has 1019 states and 3029 transitions. [2022-02-11 00:33:00,208 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.4074074074074074) internal successors, (38), 27 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) [2022-02-11 00:33:00,208 INFO L276 IsEmpty]: Start isEmpty. Operand 1019 states and 3029 transitions. [2022-02-11 00:33:00,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-02-11 00:33:00,209 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:33:00,209 INFO L515 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:33:00,225 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (314)] Ended with exit code 0 [2022-02-11 00:33:00,409 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable321,314 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:33:00,409 INFO L402 AbstractCegarLoop]: === Iteration 323 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:33:00,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:33:00,409 INFO L85 PathProgramCache]: Analyzing trace with hash 1568116523, now seen corresponding path program 314 times [2022-02-11 00:33:00,410 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:33:00,410 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [128964568] [2022-02-11 00:33:00,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:33:00,410 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:33:00,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:33:00,533 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:33:00,533 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:33:00,533 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [128964568] [2022-02-11 00:33:00,533 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [128964568] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:33:00,533 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [967959825] [2022-02-11 00:33:00,533 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-11 00:33:00,533 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:33:00,534 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:33:00,534 INFO L229 MonitoredProcess]: Starting monitored process 315 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:33:00,535 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (315)] Waiting until timeout for monitored process [2022-02-11 00:33:00,610 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-11 00:33:00,611 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:33:00,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-11 00:33:00,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:33:00,913 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:33:00,913 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:33:01,124 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:33:01,124 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 42 treesize of output 40 [2022-02-11 00:33:01,129 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:33:01,129 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 30 treesize of output 28 [2022-02-11 00:33:01,217 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:33:01,217 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [967959825] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:33:01,217 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:33:01,217 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 27 [2022-02-11 00:33:01,217 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1423659500] [2022-02-11 00:33:01,218 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:33:01,218 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-11 00:33:01,218 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:33:01,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-11 00:33:01,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=626, Unknown=0, NotChecked=0, Total=702 [2022-02-11 00:33:01,218 INFO L87 Difference]: Start difference. First operand 1019 states and 3029 transitions. Second operand has 27 states, 27 states have (on average 1.4074074074074074) internal successors, (38), 27 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) [2022-02-11 00:33:02,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:33:02,057 INFO L93 Difference]: Finished difference Result 1102 states and 3197 transitions. [2022-02-11 00:33:02,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-02-11 00:33:02,058 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.4074074074074074) internal successors, (38), 27 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 19 [2022-02-11 00:33:02,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:33:02,059 INFO L225 Difference]: With dead ends: 1102 [2022-02-11 00:33:02,059 INFO L226 Difference]: Without dead ends: 1102 [2022-02-11 00:33:02,059 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 267 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=211, Invalid=1595, Unknown=0, NotChecked=0, Total=1806 [2022-02-11 00:33:02,060 INFO L934 BasicCegarLoop]: 9 mSDtfsCounter, 96 mSDsluCounter, 359 mSDsCounter, 0 mSdLazyCounter, 673 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 170 SdHoareTripleChecker+Invalid, 697 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 673 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-11 00:33:02,060 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [96 Valid, 170 Invalid, 697 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 673 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-11 00:33:02,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1102 states. [2022-02-11 00:33:02,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1102 to 1018. [2022-02-11 00:33:02,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1018 states, 1017 states have (on average 2.975417895771878) internal successors, (3026), 1017 states have internal predecessors, (3026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:33:02,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1018 states to 1018 states and 3026 transitions. [2022-02-11 00:33:02,071 INFO L78 Accepts]: Start accepts. Automaton has 1018 states and 3026 transitions. Word has length 19 [2022-02-11 00:33:02,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:33:02,071 INFO L470 AbstractCegarLoop]: Abstraction has 1018 states and 3026 transitions. [2022-02-11 00:33:02,071 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.4074074074074074) internal successors, (38), 27 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) [2022-02-11 00:33:02,071 INFO L276 IsEmpty]: Start isEmpty. Operand 1018 states and 3026 transitions. [2022-02-11 00:33:02,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-02-11 00:33:02,072 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:33:02,072 INFO L515 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:33:02,089 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (315)] Ended with exit code 0 [2022-02-11 00:33:02,273 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 315 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable322 [2022-02-11 00:33:02,273 INFO L402 AbstractCegarLoop]: === Iteration 324 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:33:02,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:33:02,273 INFO L85 PathProgramCache]: Analyzing trace with hash -1841052493, now seen corresponding path program 315 times [2022-02-11 00:33:02,273 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:33:02,273 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1700971158] [2022-02-11 00:33:02,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:33:02,273 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:33:02,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:33:02,400 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:33:02,400 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:33:02,400 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1700971158] [2022-02-11 00:33:02,400 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1700971158] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:33:02,400 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1934710641] [2022-02-11 00:33:02,400 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-11 00:33:02,401 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:33:02,403 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:33:02,404 INFO L229 MonitoredProcess]: Starting monitored process 316 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:33:02,404 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (316)] Waiting until timeout for monitored process [2022-02-11 00:33:02,487 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-11 00:33:02,487 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:33:02,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-11 00:33:02,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:33:02,783 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:33:02,783 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:33:02,983 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:33:02,984 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 42 treesize of output 40 [2022-02-11 00:33:02,989 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:33:02,989 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 30 treesize of output 28 [2022-02-11 00:33:03,074 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:33:03,074 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1934710641] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:33:03,074 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:33:03,074 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 27 [2022-02-11 00:33:03,074 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986777855] [2022-02-11 00:33:03,074 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:33:03,074 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-11 00:33:03,074 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:33:03,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-11 00:33:03,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=628, Unknown=0, NotChecked=0, Total=702 [2022-02-11 00:33:03,075 INFO L87 Difference]: Start difference. First operand 1018 states and 3026 transitions. Second operand has 27 states, 27 states have (on average 1.4074074074074074) internal successors, (38), 27 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) [2022-02-11 00:33:03,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:33:03,444 INFO L93 Difference]: Finished difference Result 1084 states and 3154 transitions. [2022-02-11 00:33:03,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-02-11 00:33:03,444 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.4074074074074074) internal successors, (38), 27 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 19 [2022-02-11 00:33:03,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:33:03,445 INFO L225 Difference]: With dead ends: 1084 [2022-02-11 00:33:03,445 INFO L226 Difference]: Without dead ends: 1084 [2022-02-11 00:33:03,445 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=113, Invalid=879, Unknown=0, NotChecked=0, Total=992 [2022-02-11 00:33:03,446 INFO L934 BasicCegarLoop]: 9 mSDtfsCounter, 70 mSDsluCounter, 332 mSDsCounter, 0 mSdLazyCounter, 591 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 599 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 591 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-11 00:33:03,446 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 149 Invalid, 599 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 591 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-11 00:33:03,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1084 states. [2022-02-11 00:33:03,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1084 to 1010. [2022-02-11 00:33:03,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1010 states, 1009 states have (on average 2.9742319127849357) internal successors, (3001), 1009 states have internal predecessors, (3001), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:33:03,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1010 states to 1010 states and 3001 transitions. [2022-02-11 00:33:03,457 INFO L78 Accepts]: Start accepts. Automaton has 1010 states and 3001 transitions. Word has length 19 [2022-02-11 00:33:03,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:33:03,457 INFO L470 AbstractCegarLoop]: Abstraction has 1010 states and 3001 transitions. [2022-02-11 00:33:03,457 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.4074074074074074) internal successors, (38), 27 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) [2022-02-11 00:33:03,457 INFO L276 IsEmpty]: Start isEmpty. Operand 1010 states and 3001 transitions. [2022-02-11 00:33:03,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-02-11 00:33:03,458 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:33:03,458 INFO L515 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:33:03,474 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (316)] Forceful destruction successful, exit code 0 [2022-02-11 00:33:03,658 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 316 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable323 [2022-02-11 00:33:03,658 INFO L402 AbstractCegarLoop]: === Iteration 325 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:33:03,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:33:03,658 INFO L85 PathProgramCache]: Analyzing trace with hash 689802543, now seen corresponding path program 316 times [2022-02-11 00:33:03,659 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:33:03,659 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [258442759] [2022-02-11 00:33:03,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:33:03,659 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:33:03,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:33:03,802 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:33:03,802 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:33:03,802 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [258442759] [2022-02-11 00:33:03,802 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [258442759] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:33:03,802 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [611335080] [2022-02-11 00:33:03,802 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-11 00:33:03,803 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:33:03,803 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:33:03,803 INFO L229 MonitoredProcess]: Starting monitored process 317 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:33:03,804 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (317)] Waiting until timeout for monitored process [2022-02-11 00:33:03,876 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-11 00:33:03,876 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:33:03,877 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-11 00:33:03,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:33:04,154 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:33:04,154 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:33:04,280 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:33:04,280 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 33 treesize of output 33 [2022-02-11 00:33:04,286 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:33:04,286 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 25 treesize of output 25 [2022-02-11 00:33:04,388 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:33:04,388 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [611335080] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:33:04,388 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:33:04,388 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-02-11 00:33:04,388 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1987526334] [2022-02-11 00:33:04,388 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:33:04,388 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-11 00:33:04,388 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:33:04,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-11 00:33:04,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=521, Unknown=0, NotChecked=0, Total=600 [2022-02-11 00:33:04,389 INFO L87 Difference]: Start difference. First operand 1010 states and 3001 transitions. Second operand has 25 states, 25 states have (on average 1.52) internal successors, (38), 25 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) [2022-02-11 00:33:05,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:33:05,150 INFO L93 Difference]: Finished difference Result 1144 states and 3270 transitions. [2022-02-11 00:33:05,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-02-11 00:33:05,151 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.52) internal successors, (38), 25 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 19 [2022-02-11 00:33:05,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:33:05,152 INFO L225 Difference]: With dead ends: 1144 [2022-02-11 00:33:05,152 INFO L226 Difference]: Without dead ends: 1144 [2022-02-11 00:33:05,152 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 305 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=228, Invalid=1412, Unknown=0, NotChecked=0, Total=1640 [2022-02-11 00:33:05,152 INFO L934 BasicCegarLoop]: 17 mSDtfsCounter, 204 mSDsluCounter, 399 mSDsCounter, 0 mSdLazyCounter, 921 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 204 SdHoareTripleChecker+Valid, 219 SdHoareTripleChecker+Invalid, 967 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 921 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-11 00:33:05,152 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [204 Valid, 219 Invalid, 967 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 921 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-11 00:33:05,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1144 states. [2022-02-11 00:33:05,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1144 to 1011. [2022-02-11 00:33:05,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1011 states, 1010 states have (on average 2.9742574257425742) internal successors, (3004), 1010 states have internal predecessors, (3004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:33:05,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1011 states to 1011 states and 3004 transitions. [2022-02-11 00:33:05,163 INFO L78 Accepts]: Start accepts. Automaton has 1011 states and 3004 transitions. Word has length 19 [2022-02-11 00:33:05,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:33:05,163 INFO L470 AbstractCegarLoop]: Abstraction has 1011 states and 3004 transitions. [2022-02-11 00:33:05,163 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.52) internal successors, (38), 25 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) [2022-02-11 00:33:05,163 INFO L276 IsEmpty]: Start isEmpty. Operand 1011 states and 3004 transitions. [2022-02-11 00:33:05,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-02-11 00:33:05,164 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:33:05,165 INFO L515 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:33:05,181 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (317)] Ended with exit code 0 [2022-02-11 00:33:05,365 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable324,317 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:33:05,365 INFO L402 AbstractCegarLoop]: === Iteration 326 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:33:05,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:33:05,365 INFO L85 PathProgramCache]: Analyzing trace with hash -1458993993, now seen corresponding path program 317 times [2022-02-11 00:33:05,365 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:33:05,365 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [60695174] [2022-02-11 00:33:05,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:33:05,365 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:33:05,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:33:05,508 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:33:05,508 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:33:05,508 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [60695174] [2022-02-11 00:33:05,508 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [60695174] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:33:05,508 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2114931730] [2022-02-11 00:33:05,508 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-11 00:33:05,508 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:33:05,508 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:33:05,509 INFO L229 MonitoredProcess]: Starting monitored process 318 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:33:05,510 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (318)] Waiting until timeout for monitored process [2022-02-11 00:33:05,586 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-02-11 00:33:05,587 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:33:05,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 33 conjunts are in the unsatisfiable core [2022-02-11 00:33:05,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:33:05,844 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 73 [2022-02-11 00:33:05,846 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 57 [2022-02-11 00:33:05,930 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:33:05,930 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:33:06,067 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:33:06,067 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 35 treesize of output 35 [2022-02-11 00:33:06,072 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:33:06,072 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2022-02-11 00:33:06,182 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:33:06,182 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2114931730] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:33:06,182 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:33:06,182 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-02-11 00:33:06,182 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127168294] [2022-02-11 00:33:06,182 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:33:06,183 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-11 00:33:06,183 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:33:06,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-11 00:33:06,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=525, Unknown=0, NotChecked=0, Total=600 [2022-02-11 00:33:06,183 INFO L87 Difference]: Start difference. First operand 1011 states and 3004 transitions. Second operand has 25 states, 25 states have (on average 1.52) internal successors, (38), 25 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) [2022-02-11 00:33:06,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:33:06,947 INFO L93 Difference]: Finished difference Result 1181 states and 3334 transitions. [2022-02-11 00:33:06,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-02-11 00:33:06,948 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.52) internal successors, (38), 25 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 19 [2022-02-11 00:33:06,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:33:06,949 INFO L225 Difference]: With dead ends: 1181 [2022-02-11 00:33:06,949 INFO L226 Difference]: Without dead ends: 1181 [2022-02-11 00:33:06,950 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 310 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=220, Invalid=1420, Unknown=0, NotChecked=0, Total=1640 [2022-02-11 00:33:06,950 INFO L934 BasicCegarLoop]: 22 mSDtfsCounter, 253 mSDsluCounter, 434 mSDsCounter, 0 mSdLazyCounter, 948 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 253 SdHoareTripleChecker+Valid, 264 SdHoareTripleChecker+Invalid, 1007 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 948 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-11 00:33:06,950 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [253 Valid, 264 Invalid, 1007 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 948 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-11 00:33:06,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1181 states. [2022-02-11 00:33:06,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1181 to 1012. [2022-02-11 00:33:06,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1012 states, 1011 states have (on average 2.9752720079129573) internal successors, (3008), 1011 states have internal predecessors, (3008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:33:06,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1012 states to 1012 states and 3008 transitions. [2022-02-11 00:33:06,961 INFO L78 Accepts]: Start accepts. Automaton has 1012 states and 3008 transitions. Word has length 19 [2022-02-11 00:33:06,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:33:06,961 INFO L470 AbstractCegarLoop]: Abstraction has 1012 states and 3008 transitions. [2022-02-11 00:33:06,961 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.52) internal successors, (38), 25 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) [2022-02-11 00:33:06,961 INFO L276 IsEmpty]: Start isEmpty. Operand 1012 states and 3008 transitions. [2022-02-11 00:33:06,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-02-11 00:33:06,962 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:33:06,962 INFO L515 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:33:06,978 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (318)] Forceful destruction successful, exit code 0 [2022-02-11 00:33:07,163 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable325,318 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:33:07,163 INFO L402 AbstractCegarLoop]: === Iteration 327 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:33:07,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:33:07,163 INFO L85 PathProgramCache]: Analyzing trace with hash 1491317359, now seen corresponding path program 318 times [2022-02-11 00:33:07,163 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:33:07,163 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1106995223] [2022-02-11 00:33:07,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:33:07,163 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:33:07,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:33:07,312 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:33:07,312 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:33:07,312 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1106995223] [2022-02-11 00:33:07,312 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1106995223] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:33:07,312 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1311252709] [2022-02-11 00:33:07,312 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-11 00:33:07,312 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:33:07,312 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:33:07,313 INFO L229 MonitoredProcess]: Starting monitored process 319 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:33:07,313 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (319)] Waiting until timeout for monitored process [2022-02-11 00:33:07,387 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-02-11 00:33:07,388 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:33:07,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 35 conjunts are in the unsatisfiable core [2022-02-11 00:33:07,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:33:07,718 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 104 treesize of output 88 [2022-02-11 00:33:07,720 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 88 treesize of output 72 [2022-02-11 00:33:07,812 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:33:07,813 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:33:07,914 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:33:07,914 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 65 treesize of output 61 [2022-02-11 00:33:07,927 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:33:07,927 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 53 treesize of output 49 [2022-02-11 00:33:08,108 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:33:08,109 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1311252709] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:33:08,109 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:33:08,109 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-02-11 00:33:08,109 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1783895645] [2022-02-11 00:33:08,109 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:33:08,109 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-11 00:33:08,109 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:33:08,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-11 00:33:08,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=559, Unknown=0, NotChecked=0, Total=650 [2022-02-11 00:33:08,109 INFO L87 Difference]: Start difference. First operand 1012 states and 3008 transitions. Second operand has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 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) [2022-02-11 00:33:08,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:33:08,726 INFO L93 Difference]: Finished difference Result 1107 states and 3186 transitions. [2022-02-11 00:33:08,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-02-11 00:33:08,727 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 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 19 [2022-02-11 00:33:08,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:33:08,728 INFO L225 Difference]: With dead ends: 1107 [2022-02-11 00:33:08,728 INFO L226 Difference]: Without dead ends: 1103 [2022-02-11 00:33:08,728 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 307 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=232, Invalid=1328, Unknown=0, NotChecked=0, Total=1560 [2022-02-11 00:33:08,729 INFO L934 BasicCegarLoop]: 14 mSDtfsCounter, 166 mSDsluCounter, 334 mSDsCounter, 0 mSdLazyCounter, 799 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 166 SdHoareTripleChecker+Valid, 173 SdHoareTripleChecker+Invalid, 851 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 799 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-11 00:33:08,729 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [166 Valid, 173 Invalid, 851 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 799 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-11 00:33:08,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1103 states. [2022-02-11 00:33:08,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1103 to 1006. [2022-02-11 00:33:08,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1006 states, 1005 states have (on average 2.9741293532338307) internal successors, (2989), 1005 states have internal predecessors, (2989), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:33:08,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1006 states to 1006 states and 2989 transitions. [2022-02-11 00:33:08,740 INFO L78 Accepts]: Start accepts. Automaton has 1006 states and 2989 transitions. Word has length 19 [2022-02-11 00:33:08,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:33:08,740 INFO L470 AbstractCegarLoop]: Abstraction has 1006 states and 2989 transitions. [2022-02-11 00:33:08,740 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 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) [2022-02-11 00:33:08,740 INFO L276 IsEmpty]: Start isEmpty. Operand 1006 states and 2989 transitions. [2022-02-11 00:33:08,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-02-11 00:33:08,741 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:33:08,741 INFO L515 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:33:08,760 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (319)] Ended with exit code 0 [2022-02-11 00:33:08,941 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable326,319 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:33:08,941 INFO L402 AbstractCegarLoop]: === Iteration 328 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:33:08,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:33:08,942 INFO L85 PathProgramCache]: Analyzing trace with hash -696865817, now seen corresponding path program 319 times [2022-02-11 00:33:08,942 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:33:08,942 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1357252196] [2022-02-11 00:33:08,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:33:08,942 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:33:08,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:33:09,082 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:33:09,083 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:33:09,083 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1357252196] [2022-02-11 00:33:09,083 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1357252196] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:33:09,083 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [274326969] [2022-02-11 00:33:09,083 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-11 00:33:09,083 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:33:09,083 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:33:09,084 INFO L229 MonitoredProcess]: Starting monitored process 320 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:33:09,084 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (320)] Waiting until timeout for monitored process [2022-02-11 00:33:09,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:33:09,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-11 00:33:09,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:33:09,412 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 87 treesize of output 71 [2022-02-11 00:33:09,414 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 55 [2022-02-11 00:33:09,486 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:33:09,486 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:33:09,621 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:33:09,621 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 34 treesize of output 34 [2022-02-11 00:33:09,626 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:33:09,626 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 26 treesize of output 26 [2022-02-11 00:33:09,738 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:33:09,738 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [274326969] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:33:09,738 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:33:09,738 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-02-11 00:33:09,738 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [454681628] [2022-02-11 00:33:09,738 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:33:09,739 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-11 00:33:09,739 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:33:09,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-11 00:33:09,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=527, Unknown=0, NotChecked=0, Total=600 [2022-02-11 00:33:09,739 INFO L87 Difference]: Start difference. First operand 1006 states and 2989 transitions. Second operand has 25 states, 25 states have (on average 1.48) internal successors, (37), 25 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) [2022-02-11 00:33:10,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:33:10,804 INFO L93 Difference]: Finished difference Result 1229 states and 3461 transitions. [2022-02-11 00:33:10,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-02-11 00:33:10,804 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.48) internal successors, (37), 25 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 19 [2022-02-11 00:33:10,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:33:10,806 INFO L225 Difference]: With dead ends: 1229 [2022-02-11 00:33:10,806 INFO L226 Difference]: Without dead ends: 1227 [2022-02-11 00:33:10,806 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 470 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=302, Invalid=1954, Unknown=0, NotChecked=0, Total=2256 [2022-02-11 00:33:10,807 INFO L934 BasicCegarLoop]: 14 mSDtfsCounter, 226 mSDsluCounter, 394 mSDsCounter, 0 mSdLazyCounter, 823 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 226 SdHoareTripleChecker+Valid, 206 SdHoareTripleChecker+Invalid, 909 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 823 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-11 00:33:10,807 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [226 Valid, 206 Invalid, 909 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 823 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-11 00:33:10,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1227 states. [2022-02-11 00:33:10,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1227 to 1011. [2022-02-11 00:33:10,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1011 states, 1010 states have (on average 2.976237623762376) internal successors, (3006), 1010 states have internal predecessors, (3006), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:33:10,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1011 states to 1011 states and 3006 transitions. [2022-02-11 00:33:10,819 INFO L78 Accepts]: Start accepts. Automaton has 1011 states and 3006 transitions. Word has length 19 [2022-02-11 00:33:10,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:33:10,819 INFO L470 AbstractCegarLoop]: Abstraction has 1011 states and 3006 transitions. [2022-02-11 00:33:10,819 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.48) internal successors, (37), 25 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) [2022-02-11 00:33:10,819 INFO L276 IsEmpty]: Start isEmpty. Operand 1011 states and 3006 transitions. [2022-02-11 00:33:10,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-02-11 00:33:10,820 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:33:10,820 INFO L515 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:33:10,836 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (320)] Ended with exit code 0 [2022-02-11 00:33:11,020 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 320 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable327 [2022-02-11 00:33:11,021 INFO L402 AbstractCegarLoop]: === Iteration 329 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:33:11,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:33:11,021 INFO L85 PathProgramCache]: Analyzing trace with hash 1449304943, now seen corresponding path program 320 times [2022-02-11 00:33:11,021 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:33:11,021 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [137684821] [2022-02-11 00:33:11,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:33:11,021 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:33:11,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:33:11,180 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:33:11,181 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:33:11,181 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [137684821] [2022-02-11 00:33:11,181 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [137684821] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:33:11,181 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [155013677] [2022-02-11 00:33:11,181 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-11 00:33:11,181 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:33:11,181 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:33:11,182 INFO L229 MonitoredProcess]: Starting monitored process 321 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:33:11,182 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (321)] Waiting until timeout for monitored process [2022-02-11 00:33:11,254 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-11 00:33:11,254 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:33:11,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 33 conjunts are in the unsatisfiable core [2022-02-11 00:33:11,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:33:11,535 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:33:11,535 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:33:11,670 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:33:11,670 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 34 [2022-02-11 00:33:11,677 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:33:11,677 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 26 treesize of output 26 [2022-02-11 00:33:11,792 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:33:11,793 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [155013677] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:33:11,793 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:33:11,793 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-02-11 00:33:11,793 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1467398356] [2022-02-11 00:33:11,793 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:33:11,793 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-11 00:33:11,793 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:33:11,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-11 00:33:11,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=568, Unknown=0, NotChecked=0, Total=650 [2022-02-11 00:33:11,793 INFO L87 Difference]: Start difference. First operand 1011 states and 3006 transitions. Second operand has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 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) [2022-02-11 00:33:12,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:33:12,641 INFO L93 Difference]: Finished difference Result 1179 states and 3349 transitions. [2022-02-11 00:33:12,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-02-11 00:33:12,641 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 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 19 [2022-02-11 00:33:12,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:33:12,643 INFO L225 Difference]: With dead ends: 1179 [2022-02-11 00:33:12,643 INFO L226 Difference]: Without dead ends: 1179 [2022-02-11 00:33:12,643 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 333 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=230, Invalid=1492, Unknown=0, NotChecked=0, Total=1722 [2022-02-11 00:33:12,643 INFO L934 BasicCegarLoop]: 19 mSDtfsCounter, 143 mSDsluCounter, 493 mSDsCounter, 0 mSdLazyCounter, 928 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 264 SdHoareTripleChecker+Invalid, 977 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 928 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-11 00:33:12,643 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [143 Valid, 264 Invalid, 977 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 928 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-11 00:33:12,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1179 states. [2022-02-11 00:33:12,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1179 to 1002. [2022-02-11 00:33:12,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1002 states, 1001 states have (on average 2.977022977022977) internal successors, (2980), 1001 states have internal predecessors, (2980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:33:12,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1002 states to 1002 states and 2980 transitions. [2022-02-11 00:33:12,655 INFO L78 Accepts]: Start accepts. Automaton has 1002 states and 2980 transitions. Word has length 19 [2022-02-11 00:33:12,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:33:12,655 INFO L470 AbstractCegarLoop]: Abstraction has 1002 states and 2980 transitions. [2022-02-11 00:33:12,655 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 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) [2022-02-11 00:33:12,655 INFO L276 IsEmpty]: Start isEmpty. Operand 1002 states and 2980 transitions. [2022-02-11 00:33:12,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-02-11 00:33:12,656 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:33:12,656 INFO L515 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:33:12,672 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (321)] Ended with exit code 0 [2022-02-11 00:33:12,856 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable328,321 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:33:12,856 INFO L402 AbstractCegarLoop]: === Iteration 330 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:33:12,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:33:12,856 INFO L85 PathProgramCache]: Analyzing trace with hash 188932463, now seen corresponding path program 321 times [2022-02-11 00:33:12,857 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:33:12,857 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1892485809] [2022-02-11 00:33:12,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:33:12,857 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:33:12,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:33:12,982 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:33:12,982 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:33:12,982 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1892485809] [2022-02-11 00:33:12,982 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1892485809] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:33:12,982 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1343976682] [2022-02-11 00:33:12,982 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-11 00:33:12,983 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:33:12,983 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:33:12,983 INFO L229 MonitoredProcess]: Starting monitored process 322 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:33:12,984 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (322)] Waiting until timeout for monitored process [2022-02-11 00:33:13,057 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-02-11 00:33:13,057 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:33:13,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-11 00:33:13,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:33:13,318 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 87 treesize of output 71 [2022-02-11 00:33:13,320 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 55 [2022-02-11 00:33:13,389 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:33:13,390 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:33:13,540 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:33:13,540 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 42 treesize of output 40 [2022-02-11 00:33:13,546 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:33:13,546 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 30 treesize of output 28 [2022-02-11 00:33:13,655 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:33:13,656 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1343976682] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:33:13,656 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:33:13,656 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-02-11 00:33:13,656 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [329921659] [2022-02-11 00:33:13,656 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:33:13,656 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-11 00:33:13,656 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:33:13,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-11 00:33:13,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=572, Unknown=0, NotChecked=0, Total=650 [2022-02-11 00:33:13,656 INFO L87 Difference]: Start difference. First operand 1002 states and 2980 transitions. Second operand has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 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) [2022-02-11 00:33:14,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:33:14,579 INFO L93 Difference]: Finished difference Result 1191 states and 3374 transitions. [2022-02-11 00:33:14,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-02-11 00:33:14,579 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 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 19 [2022-02-11 00:33:14,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:33:14,580 INFO L225 Difference]: With dead ends: 1191 [2022-02-11 00:33:14,580 INFO L226 Difference]: Without dead ends: 1189 [2022-02-11 00:33:14,581 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 354 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=247, Invalid=1559, Unknown=0, NotChecked=0, Total=1806 [2022-02-11 00:33:14,581 INFO L934 BasicCegarLoop]: 15 mSDtfsCounter, 199 mSDsluCounter, 407 mSDsCounter, 0 mSdLazyCounter, 797 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 199 SdHoareTripleChecker+Valid, 212 SdHoareTripleChecker+Invalid, 874 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 797 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-11 00:33:14,581 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [199 Valid, 212 Invalid, 874 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 797 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-11 00:33:14,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1189 states. [2022-02-11 00:33:14,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1189 to 1009. [2022-02-11 00:33:14,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1009 states, 1008 states have (on average 2.9771825396825395) internal successors, (3001), 1008 states have internal predecessors, (3001), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:33:14,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1009 states to 1009 states and 3001 transitions. [2022-02-11 00:33:14,593 INFO L78 Accepts]: Start accepts. Automaton has 1009 states and 3001 transitions. Word has length 19 [2022-02-11 00:33:14,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:33:14,593 INFO L470 AbstractCegarLoop]: Abstraction has 1009 states and 3001 transitions. [2022-02-11 00:33:14,593 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 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) [2022-02-11 00:33:14,593 INFO L276 IsEmpty]: Start isEmpty. Operand 1009 states and 3001 transitions. [2022-02-11 00:33:14,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-02-11 00:33:14,598 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:33:14,598 INFO L515 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:33:14,615 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (322)] Forceful destruction successful, exit code 0 [2022-02-11 00:33:14,798 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 322 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable329 [2022-02-11 00:33:14,799 INFO L402 AbstractCegarLoop]: === Iteration 331 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:33:14,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:33:14,799 INFO L85 PathProgramCache]: Analyzing trace with hash -1959864073, now seen corresponding path program 322 times [2022-02-11 00:33:14,799 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:33:14,799 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [969672468] [2022-02-11 00:33:14,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:33:14,799 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:33:14,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:33:14,926 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:33:14,926 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:33:14,926 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [969672468] [2022-02-11 00:33:14,926 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [969672468] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:33:14,926 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1485075109] [2022-02-11 00:33:14,926 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-11 00:33:14,926 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:33:14,926 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:33:14,927 INFO L229 MonitoredProcess]: Starting monitored process 323 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:33:14,927 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (323)] Waiting until timeout for monitored process [2022-02-11 00:33:14,999 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-11 00:33:14,999 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:33:15,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-11 00:33:15,000 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:33:15,290 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:33:15,290 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:33:15,451 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:33:15,451 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 41 treesize of output 39 [2022-02-11 00:33:15,456 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:33:15,456 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 29 treesize of output 27 [2022-02-11 00:33:15,540 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:33:15,540 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1485075109] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:33:15,540 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:33:15,540 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-02-11 00:33:15,540 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [364043100] [2022-02-11 00:33:15,541 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:33:15,541 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-11 00:33:15,541 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:33:15,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-11 00:33:15,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=526, Unknown=0, NotChecked=0, Total=600 [2022-02-11 00:33:15,541 INFO L87 Difference]: Start difference. First operand 1009 states and 3001 transitions. Second operand has 25 states, 25 states have (on average 1.48) internal successors, (37), 25 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) [2022-02-11 00:33:16,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:33:16,337 INFO L93 Difference]: Finished difference Result 1149 states and 3276 transitions. [2022-02-11 00:33:16,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-02-11 00:33:16,338 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.48) internal successors, (37), 25 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 19 [2022-02-11 00:33:16,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:33:16,339 INFO L225 Difference]: With dead ends: 1149 [2022-02-11 00:33:16,339 INFO L226 Difference]: Without dead ends: 1149 [2022-02-11 00:33:16,339 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 290 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=210, Invalid=1350, Unknown=0, NotChecked=0, Total=1560 [2022-02-11 00:33:16,339 INFO L934 BasicCegarLoop]: 14 mSDtfsCounter, 168 mSDsluCounter, 393 mSDsCounter, 0 mSdLazyCounter, 703 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 168 SdHoareTripleChecker+Valid, 196 SdHoareTripleChecker+Invalid, 738 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 703 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-11 00:33:16,340 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [168 Valid, 196 Invalid, 738 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 703 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-11 00:33:16,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1149 states. [2022-02-11 00:33:16,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1149 to 1009. [2022-02-11 00:33:16,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1009 states, 1008 states have (on average 2.9751984126984126) internal successors, (2999), 1008 states have internal predecessors, (2999), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:33:16,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1009 states to 1009 states and 2999 transitions. [2022-02-11 00:33:16,351 INFO L78 Accepts]: Start accepts. Automaton has 1009 states and 2999 transitions. Word has length 19 [2022-02-11 00:33:16,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:33:16,351 INFO L470 AbstractCegarLoop]: Abstraction has 1009 states and 2999 transitions. [2022-02-11 00:33:16,352 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.48) internal successors, (37), 25 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) [2022-02-11 00:33:16,352 INFO L276 IsEmpty]: Start isEmpty. Operand 1009 states and 2999 transitions. [2022-02-11 00:33:16,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-02-11 00:33:16,353 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:33:16,353 INFO L515 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:33:16,369 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (323)] Ended with exit code 0 [2022-02-11 00:33:16,553 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable330,323 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:33:16,553 INFO L402 AbstractCegarLoop]: === Iteration 332 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:33:16,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:33:16,553 INFO L85 PathProgramCache]: Analyzing trace with hash 146920047, now seen corresponding path program 323 times [2022-02-11 00:33:16,553 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:33:16,553 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2114344497] [2022-02-11 00:33:16,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:33:16,554 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:33:16,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:33:16,691 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:33:16,691 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:33:16,691 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2114344497] [2022-02-11 00:33:16,691 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2114344497] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:33:16,692 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1616606779] [2022-02-11 00:33:16,692 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-11 00:33:16,692 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:33:16,692 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:33:16,693 INFO L229 MonitoredProcess]: Starting monitored process 324 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:33:16,693 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (324)] Waiting until timeout for monitored process [2022-02-11 00:33:16,773 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-11 00:33:16,773 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:33:16,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-11 00:33:16,774 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:33:17,067 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:33:17,067 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:33:17,219 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:33:17,219 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 41 treesize of output 39 [2022-02-11 00:33:17,224 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:33:17,224 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 29 treesize of output 27 [2022-02-11 00:33:17,326 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:33:17,327 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1616606779] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:33:17,327 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:33:17,327 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-02-11 00:33:17,327 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044887924] [2022-02-11 00:33:17,327 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:33:17,327 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-11 00:33:17,327 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:33:17,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-11 00:33:17,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=570, Unknown=0, NotChecked=0, Total=650 [2022-02-11 00:33:17,327 INFO L87 Difference]: Start difference. First operand 1009 states and 2999 transitions. Second operand has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 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) [2022-02-11 00:33:17,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:33:17,854 INFO L93 Difference]: Finished difference Result 1129 states and 3239 transitions. [2022-02-11 00:33:17,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-02-11 00:33:17,854 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 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 19 [2022-02-11 00:33:17,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:33:17,856 INFO L225 Difference]: With dead ends: 1129 [2022-02-11 00:33:17,856 INFO L226 Difference]: Without dead ends: 1129 [2022-02-11 00:33:17,856 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=117, Invalid=753, Unknown=0, NotChecked=0, Total=870 [2022-02-11 00:33:17,856 INFO L934 BasicCegarLoop]: 16 mSDtfsCounter, 122 mSDsluCounter, 503 mSDsCounter, 0 mSdLazyCounter, 888 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 235 SdHoareTripleChecker+Invalid, 902 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 888 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-11 00:33:17,856 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [122 Valid, 235 Invalid, 902 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 888 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-11 00:33:17,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1129 states. [2022-02-11 00:33:17,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1129 to 1003. [2022-02-11 00:33:17,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1003 states, 1002 states have (on average 2.974051896207585) internal successors, (2980), 1002 states have internal predecessors, (2980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:33:17,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1003 states to 1003 states and 2980 transitions. [2022-02-11 00:33:17,867 INFO L78 Accepts]: Start accepts. Automaton has 1003 states and 2980 transitions. Word has length 19 [2022-02-11 00:33:17,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:33:17,867 INFO L470 AbstractCegarLoop]: Abstraction has 1003 states and 2980 transitions. [2022-02-11 00:33:17,867 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 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) [2022-02-11 00:33:17,867 INFO L276 IsEmpty]: Start isEmpty. Operand 1003 states and 2980 transitions. [2022-02-11 00:33:17,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-02-11 00:33:17,868 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:33:17,868 INFO L515 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:33:17,888 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (324)] Forceful destruction successful, exit code 0 [2022-02-11 00:33:18,069 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 324 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable331 [2022-02-11 00:33:18,069 INFO L402 AbstractCegarLoop]: === Iteration 333 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:33:18,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:33:18,069 INFO L85 PathProgramCache]: Analyzing trace with hash -1071435985, now seen corresponding path program 324 times [2022-02-11 00:33:18,069 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:33:18,069 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [235723848] [2022-02-11 00:33:18,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:33:18,069 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:33:18,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:33:18,208 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:33:18,209 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:33:18,209 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [235723848] [2022-02-11 00:33:18,209 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [235723848] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:33:18,209 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1581314510] [2022-02-11 00:33:18,209 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-11 00:33:18,209 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:33:18,209 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:33:18,210 INFO L229 MonitoredProcess]: Starting monitored process 325 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:33:18,210 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (325)] Waiting until timeout for monitored process [2022-02-11 00:33:18,284 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-02-11 00:33:18,284 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:33:18,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-11 00:33:18,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:33:18,604 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 98 treesize of output 82 [2022-02-11 00:33:18,606 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 82 treesize of output 66 [2022-02-11 00:33:18,677 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:33:18,677 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:33:18,835 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:33:18,836 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 71 treesize of output 65 [2022-02-11 00:33:18,842 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:33:18,842 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 55 treesize of output 49 [2022-02-11 00:33:18,974 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:33:18,974 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1581314510] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:33:18,974 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:33:18,974 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 27 [2022-02-11 00:33:18,974 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1300298104] [2022-02-11 00:33:18,974 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:33:18,975 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-11 00:33:18,975 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:33:18,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-11 00:33:18,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=606, Unknown=0, NotChecked=0, Total=702 [2022-02-11 00:33:18,975 INFO L87 Difference]: Start difference. First operand 1003 states and 2980 transitions. Second operand has 27 states, 27 states have (on average 1.4444444444444444) internal successors, (39), 27 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) [2022-02-11 00:33:19,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:33:19,364 INFO L93 Difference]: Finished difference Result 1054 states and 3080 transitions. [2022-02-11 00:33:19,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-11 00:33:19,365 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.4444444444444444) internal successors, (39), 27 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 19 [2022-02-11 00:33:19,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:33:19,366 INFO L225 Difference]: With dead ends: 1054 [2022-02-11 00:33:19,366 INFO L226 Difference]: Without dead ends: 1054 [2022-02-11 00:33:19,366 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=132, Invalid=860, Unknown=0, NotChecked=0, Total=992 [2022-02-11 00:33:19,366 INFO L934 BasicCegarLoop]: 12 mSDtfsCounter, 96 mSDsluCounter, 327 mSDsCounter, 0 mSdLazyCounter, 602 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 167 SdHoareTripleChecker+Invalid, 613 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 602 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-11 00:33:19,366 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [96 Valid, 167 Invalid, 613 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 602 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-11 00:33:19,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1054 states. [2022-02-11 00:33:19,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1054 to 1003. [2022-02-11 00:33:19,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1003 states, 1002 states have (on average 2.974051896207585) internal successors, (2980), 1002 states have internal predecessors, (2980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:33:19,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1003 states to 1003 states and 2980 transitions. [2022-02-11 00:33:19,377 INFO L78 Accepts]: Start accepts. Automaton has 1003 states and 2980 transitions. Word has length 19 [2022-02-11 00:33:19,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:33:19,377 INFO L470 AbstractCegarLoop]: Abstraction has 1003 states and 2980 transitions. [2022-02-11 00:33:19,377 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.4444444444444444) internal successors, (39), 27 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) [2022-02-11 00:33:19,377 INFO L276 IsEmpty]: Start isEmpty. Operand 1003 states and 2980 transitions. [2022-02-11 00:33:19,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-02-11 00:33:19,378 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:33:19,378 INFO L515 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:33:19,394 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (325)] Ended with exit code 0 [2022-02-11 00:33:19,578 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 325 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable332 [2022-02-11 00:33:19,579 INFO L402 AbstractCegarLoop]: === Iteration 334 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:33:19,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:33:19,579 INFO L85 PathProgramCache]: Analyzing trace with hash 1878875367, now seen corresponding path program 325 times [2022-02-11 00:33:19,579 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:33:19,579 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1120958905] [2022-02-11 00:33:19,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:33:19,579 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:33:19,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:33:19,701 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:33:19,701 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:33:19,701 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1120958905] [2022-02-11 00:33:19,701 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1120958905] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:33:19,701 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [598169029] [2022-02-11 00:33:19,701 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-11 00:33:19,701 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:33:19,701 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:33:19,702 INFO L229 MonitoredProcess]: Starting monitored process 326 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:33:19,702 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (326)] Waiting until timeout for monitored process [2022-02-11 00:33:19,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:33:19,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-11 00:33:19,774 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:33:20,064 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 73 [2022-02-11 00:33:20,066 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 57 [2022-02-11 00:33:20,141 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:33:20,141 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:33:20,320 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:33:20,320 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 42 treesize of output 40 [2022-02-11 00:33:20,326 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:33:20,326 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 30 treesize of output 28 [2022-02-11 00:33:20,413 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:33:20,413 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [598169029] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:33:20,413 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:33:20,413 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 27 [2022-02-11 00:33:20,413 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [844455907] [2022-02-11 00:33:20,413 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:33:20,413 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-11 00:33:20,413 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:33:20,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-11 00:33:20,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=628, Unknown=0, NotChecked=0, Total=702 [2022-02-11 00:33:20,414 INFO L87 Difference]: Start difference. First operand 1003 states and 2980 transitions. Second operand has 27 states, 27 states have (on average 1.4074074074074074) internal successors, (38), 27 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) [2022-02-11 00:33:20,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:33:20,967 INFO L93 Difference]: Finished difference Result 1088 states and 3144 transitions. [2022-02-11 00:33:20,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-02-11 00:33:20,967 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.4074074074074074) internal successors, (38), 27 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 19 [2022-02-11 00:33:20,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:33:20,969 INFO L225 Difference]: With dead ends: 1088 [2022-02-11 00:33:20,969 INFO L226 Difference]: Without dead ends: 1086 [2022-02-11 00:33:20,969 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=181, Invalid=1151, Unknown=0, NotChecked=0, Total=1332 [2022-02-11 00:33:20,969 INFO L934 BasicCegarLoop]: 14 mSDtfsCounter, 173 mSDsluCounter, 420 mSDsCounter, 0 mSdLazyCounter, 782 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 173 SdHoareTripleChecker+Valid, 223 SdHoareTripleChecker+Invalid, 825 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 782 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-11 00:33:20,969 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [173 Valid, 223 Invalid, 825 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 782 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-11 00:33:20,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1086 states. [2022-02-11 00:33:20,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1086 to 1007. [2022-02-11 00:33:20,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1007 states, 1006 states have (on average 2.975149105367793) internal successors, (2993), 1006 states have internal predecessors, (2993), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:33:20,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1007 states to 1007 states and 2993 transitions. [2022-02-11 00:33:20,985 INFO L78 Accepts]: Start accepts. Automaton has 1007 states and 2993 transitions. Word has length 19 [2022-02-11 00:33:20,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:33:20,985 INFO L470 AbstractCegarLoop]: Abstraction has 1007 states and 2993 transitions. [2022-02-11 00:33:20,985 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.4074074074074074) internal successors, (38), 27 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) [2022-02-11 00:33:20,985 INFO L276 IsEmpty]: Start isEmpty. Operand 1007 states and 2993 transitions. [2022-02-11 00:33:20,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-02-11 00:33:20,986 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:33:20,986 INFO L515 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:33:21,002 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (326)] Ended with exit code 0 [2022-02-11 00:33:21,186 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 326 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable333 [2022-02-11 00:33:21,186 INFO L402 AbstractCegarLoop]: === Iteration 335 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:33:21,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:33:21,187 INFO L85 PathProgramCache]: Analyzing trace with hash -269921169, now seen corresponding path program 326 times [2022-02-11 00:33:21,187 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:33:21,187 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2129236494] [2022-02-11 00:33:21,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:33:21,187 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:33:21,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:33:21,315 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:33:21,315 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:33:21,315 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2129236494] [2022-02-11 00:33:21,315 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2129236494] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:33:21,315 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1696061945] [2022-02-11 00:33:21,316 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-11 00:33:21,316 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:33:21,316 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:33:21,317 INFO L229 MonitoredProcess]: Starting monitored process 327 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:33:21,317 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (327)] Waiting until timeout for monitored process [2022-02-11 00:33:21,390 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-11 00:33:21,390 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:33:21,391 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-11 00:33:21,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:33:21,702 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:33:21,702 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:33:21,886 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:33:21,887 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 41 treesize of output 39 [2022-02-11 00:33:21,892 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:33:21,892 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 29 treesize of output 27 [2022-02-11 00:33:21,977 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:33:21,977 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1696061945] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:33:21,977 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:33:21,977 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 27 [2022-02-11 00:33:21,977 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068034587] [2022-02-11 00:33:21,977 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:33:21,977 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-11 00:33:21,977 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:33:21,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-11 00:33:21,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=627, Unknown=0, NotChecked=0, Total=702 [2022-02-11 00:33:21,978 INFO L87 Difference]: Start difference. First operand 1007 states and 2993 transitions. Second operand has 27 states, 27 states have (on average 1.4074074074074074) internal successors, (38), 27 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) [2022-02-11 00:33:22,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:33:22,513 INFO L93 Difference]: Finished difference Result 1082 states and 3139 transitions. [2022-02-11 00:33:22,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-02-11 00:33:22,514 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.4074074074074074) internal successors, (38), 27 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 19 [2022-02-11 00:33:22,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:33:22,516 INFO L225 Difference]: With dead ends: 1082 [2022-02-11 00:33:22,516 INFO L226 Difference]: Without dead ends: 1082 [2022-02-11 00:33:22,516 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=145, Invalid=1045, Unknown=0, NotChecked=0, Total=1190 [2022-02-11 00:33:22,516 INFO L934 BasicCegarLoop]: 14 mSDtfsCounter, 146 mSDsluCounter, 455 mSDsCounter, 0 mSdLazyCounter, 841 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 225 SdHoareTripleChecker+Invalid, 869 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 841 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-11 00:33:22,516 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [146 Valid, 225 Invalid, 869 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 841 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-11 00:33:22,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1082 states. [2022-02-11 00:33:22,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1082 to 1006. [2022-02-11 00:33:22,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1006 states, 1005 states have (on average 2.976119402985075) internal successors, (2991), 1005 states have internal predecessors, (2991), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:33:22,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1006 states to 1006 states and 2991 transitions. [2022-02-11 00:33:22,530 INFO L78 Accepts]: Start accepts. Automaton has 1006 states and 2991 transitions. Word has length 19 [2022-02-11 00:33:22,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:33:22,530 INFO L470 AbstractCegarLoop]: Abstraction has 1006 states and 2991 transitions. [2022-02-11 00:33:22,530 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.4074074074074074) internal successors, (38), 27 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) [2022-02-11 00:33:22,531 INFO L276 IsEmpty]: Start isEmpty. Operand 1006 states and 2991 transitions. [2022-02-11 00:33:22,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-02-11 00:33:22,532 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:33:22,532 INFO L515 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:33:22,548 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (327)] Forceful destruction successful, exit code 0 [2022-02-11 00:33:22,732 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable334,327 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:33:22,732 INFO L402 AbstractCegarLoop]: === Iteration 336 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:33:22,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:33:22,733 INFO L85 PathProgramCache]: Analyzing trace with hash 1836862951, now seen corresponding path program 327 times [2022-02-11 00:33:22,733 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:33:22,733 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [724068361] [2022-02-11 00:33:22,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:33:22,733 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:33:22,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:33:22,860 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:33:22,860 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:33:22,860 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [724068361] [2022-02-11 00:33:22,860 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [724068361] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:33:22,861 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [569908925] [2022-02-11 00:33:22,861 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-11 00:33:22,861 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:33:22,861 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:33:22,862 INFO L229 MonitoredProcess]: Starting monitored process 328 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:33:22,862 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (328)] Waiting until timeout for monitored process [2022-02-11 00:33:22,935 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-11 00:33:22,935 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:33:22,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 35 conjunts are in the unsatisfiable core [2022-02-11 00:33:22,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:33:23,264 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:33:23,265 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:33:23,479 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-02-11 00:33:23,480 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 42 treesize of output 35 [2022-02-11 00:33:23,481 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2022-02-11 00:33:23,570 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:33:23,570 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [569908925] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:33:23,570 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:33:23,570 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 28 [2022-02-11 00:33:23,570 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659757924] [2022-02-11 00:33:23,570 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:33:23,570 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-02-11 00:33:23,570 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:33:23,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-02-11 00:33:23,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=669, Unknown=0, NotChecked=0, Total=756 [2022-02-11 00:33:23,571 INFO L87 Difference]: Start difference. First operand 1006 states and 2991 transitions. Second operand has 28 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 28 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) [2022-02-11 00:33:27,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:33:27,032 INFO L93 Difference]: Finished difference Result 2328 states and 6602 transitions. [2022-02-11 00:33:27,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-02-11 00:33:27,032 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 28 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 19 [2022-02-11 00:33:27,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:33:27,035 INFO L225 Difference]: With dead ends: 2328 [2022-02-11 00:33:27,035 INFO L226 Difference]: Without dead ends: 2324 [2022-02-11 00:33:27,036 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1159 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=894, Invalid=4508, Unknown=0, NotChecked=0, Total=5402 [2022-02-11 00:33:27,036 INFO L934 BasicCegarLoop]: 32 mSDtfsCounter, 251 mSDsluCounter, 962 mSDsCounter, 0 mSdLazyCounter, 1993 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 251 SdHoareTripleChecker+Valid, 523 SdHoareTripleChecker+Invalid, 2044 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 1993 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-11 00:33:27,036 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [251 Valid, 523 Invalid, 2044 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 1993 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-11 00:33:27,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2324 states. [2022-02-11 00:33:27,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2324 to 1155. [2022-02-11 00:33:27,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1155 states, 1154 states have (on average 3.051126516464471) internal successors, (3521), 1154 states have internal predecessors, (3521), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:33:27,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1155 states to 1155 states and 3521 transitions. [2022-02-11 00:33:27,054 INFO L78 Accepts]: Start accepts. Automaton has 1155 states and 3521 transitions. Word has length 19 [2022-02-11 00:33:27,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:33:27,054 INFO L470 AbstractCegarLoop]: Abstraction has 1155 states and 3521 transitions. [2022-02-11 00:33:27,054 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 28 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) [2022-02-11 00:33:27,054 INFO L276 IsEmpty]: Start isEmpty. Operand 1155 states and 3521 transitions. [2022-02-11 00:33:27,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-02-11 00:33:27,055 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:33:27,055 INFO L515 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:33:27,071 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (328)] Forceful destruction successful, exit code 0 [2022-02-11 00:33:27,255 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 328 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable335 [2022-02-11 00:33:27,256 INFO L402 AbstractCegarLoop]: === Iteration 337 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:33:27,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:33:27,256 INFO L85 PathProgramCache]: Analyzing trace with hash -1572306065, now seen corresponding path program 328 times [2022-02-11 00:33:27,256 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:33:27,256 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [471879988] [2022-02-11 00:33:27,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:33:27,256 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:33:27,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:33:27,377 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:33:27,377 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:33:27,377 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [471879988] [2022-02-11 00:33:27,377 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [471879988] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:33:27,377 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1353536014] [2022-02-11 00:33:27,377 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-11 00:33:27,377 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:33:27,377 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:33:27,378 INFO L229 MonitoredProcess]: Starting monitored process 329 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:33:27,378 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (329)] Waiting until timeout for monitored process [2022-02-11 00:33:27,453 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-11 00:33:27,453 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:33:27,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-11 00:33:27,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:33:27,717 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:33:27,717 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:33:27,913 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:33:27,913 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 42 treesize of output 40 [2022-02-11 00:33:27,918 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:33:27,918 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 30 treesize of output 28 [2022-02-11 00:33:28,006 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:33:28,007 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1353536014] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:33:28,007 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:33:28,007 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 27 [2022-02-11 00:33:28,007 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719068815] [2022-02-11 00:33:28,007 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:33:28,007 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-11 00:33:28,007 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:33:28,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-11 00:33:28,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=628, Unknown=0, NotChecked=0, Total=702 [2022-02-11 00:33:28,007 INFO L87 Difference]: Start difference. First operand 1155 states and 3521 transitions. Second operand has 27 states, 27 states have (on average 1.4074074074074074) internal successors, (38), 27 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) [2022-02-11 00:33:28,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:33:28,538 INFO L93 Difference]: Finished difference Result 1237 states and 3670 transitions. [2022-02-11 00:33:28,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-02-11 00:33:28,538 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.4074074074074074) internal successors, (38), 27 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 19 [2022-02-11 00:33:28,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:33:28,540 INFO L225 Difference]: With dead ends: 1237 [2022-02-11 00:33:28,540 INFO L226 Difference]: Without dead ends: 1237 [2022-02-11 00:33:28,541 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=142, Invalid=1048, Unknown=0, NotChecked=0, Total=1190 [2022-02-11 00:33:28,541 INFO L934 BasicCegarLoop]: 15 mSDtfsCounter, 122 mSDsluCounter, 513 mSDsCounter, 0 mSdLazyCounter, 847 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 244 SdHoareTripleChecker+Invalid, 860 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 847 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-11 00:33:28,541 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [122 Valid, 244 Invalid, 860 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 847 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-11 00:33:28,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1237 states. [2022-02-11 00:33:28,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1237 to 1149. [2022-02-11 00:33:28,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1149 states, 1148 states have (on average 3.0505226480836236) internal successors, (3502), 1148 states have internal predecessors, (3502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:33:28,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1149 states to 1149 states and 3502 transitions. [2022-02-11 00:33:28,557 INFO L78 Accepts]: Start accepts. Automaton has 1149 states and 3502 transitions. Word has length 19 [2022-02-11 00:33:28,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:33:28,557 INFO L470 AbstractCegarLoop]: Abstraction has 1149 states and 3502 transitions. [2022-02-11 00:33:28,557 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.4074074074074074) internal successors, (38), 27 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) [2022-02-11 00:33:28,557 INFO L276 IsEmpty]: Start isEmpty. Operand 1149 states and 3502 transitions. [2022-02-11 00:33:28,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-02-11 00:33:28,558 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:33:28,558 INFO L515 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:33:28,575 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (329)] Forceful destruction successful, exit code 0 [2022-02-11 00:33:28,759 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 329 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable336 [2022-02-11 00:33:28,759 INFO L402 AbstractCegarLoop]: === Iteration 338 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:33:28,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:33:28,759 INFO L85 PathProgramCache]: Analyzing trace with hash -1991780693, now seen corresponding path program 329 times [2022-02-11 00:33:28,759 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:33:28,759 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [485250972] [2022-02-11 00:33:28,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:33:28,759 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:33:28,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:33:28,884 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:33:28,884 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:33:28,884 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [485250972] [2022-02-11 00:33:28,884 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [485250972] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:33:28,884 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1047124579] [2022-02-11 00:33:28,884 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-11 00:33:28,884 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:33:28,884 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:33:28,885 INFO L229 MonitoredProcess]: Starting monitored process 330 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:33:28,885 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (330)] Waiting until timeout for monitored process [2022-02-11 00:33:28,960 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-02-11 00:33:28,960 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:33:28,961 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-11 00:33:28,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:33:29,276 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 73 [2022-02-11 00:33:29,278 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 57 [2022-02-11 00:33:29,354 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:33:29,354 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:33:29,578 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-11 00:33:29,578 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 31 treesize of output 26 [2022-02-11 00:33:29,618 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:33:29,618 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1047124579] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:33:29,618 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:33:29,618 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 27 [2022-02-11 00:33:29,618 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1110554148] [2022-02-11 00:33:29,618 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:33:29,618 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-11 00:33:29,618 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:33:29,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-11 00:33:29,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=624, Unknown=0, NotChecked=0, Total=702 [2022-02-11 00:33:29,619 INFO L87 Difference]: Start difference. First operand 1149 states and 3502 transitions. Second operand has 27 states, 27 states have (on average 1.4074074074074074) internal successors, (38), 27 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) [2022-02-11 00:33:30,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:33:30,445 INFO L93 Difference]: Finished difference Result 1312 states and 3802 transitions. [2022-02-11 00:33:30,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-02-11 00:33:30,445 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.4074074074074074) internal successors, (38), 27 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 19 [2022-02-11 00:33:30,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:33:30,446 INFO L225 Difference]: With dead ends: 1312 [2022-02-11 00:33:30,446 INFO L226 Difference]: Without dead ends: 1310 [2022-02-11 00:33:30,447 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 300 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=263, Invalid=1717, Unknown=0, NotChecked=0, Total=1980 [2022-02-11 00:33:30,447 INFO L934 BasicCegarLoop]: 18 mSDtfsCounter, 205 mSDsluCounter, 487 mSDsCounter, 0 mSdLazyCounter, 818 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 205 SdHoareTripleChecker+Valid, 256 SdHoareTripleChecker+Invalid, 873 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 818 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-11 00:33:30,447 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [205 Valid, 256 Invalid, 873 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 818 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-11 00:33:30,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1310 states. [2022-02-11 00:33:30,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1310 to 1152. [2022-02-11 00:33:30,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1152 states, 1151 states have (on average 3.0512597741094702) internal successors, (3512), 1151 states have internal predecessors, (3512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:33:30,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1152 states to 1152 states and 3512 transitions. [2022-02-11 00:33:30,459 INFO L78 Accepts]: Start accepts. Automaton has 1152 states and 3512 transitions. Word has length 19 [2022-02-11 00:33:30,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:33:30,459 INFO L470 AbstractCegarLoop]: Abstraction has 1152 states and 3512 transitions. [2022-02-11 00:33:30,459 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.4074074074074074) internal successors, (38), 27 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) [2022-02-11 00:33:30,459 INFO L276 IsEmpty]: Start isEmpty. Operand 1152 states and 3512 transitions. [2022-02-11 00:33:30,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-02-11 00:33:30,460 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:33:30,460 INFO L515 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:33:30,476 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (330)] Ended with exit code 0 [2022-02-11 00:33:30,660 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 330 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable337 [2022-02-11 00:33:30,660 INFO L402 AbstractCegarLoop]: === Iteration 339 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:33:30,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:33:30,661 INFO L85 PathProgramCache]: Analyzing trace with hash 154390067, now seen corresponding path program 330 times [2022-02-11 00:33:30,661 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:33:30,661 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1388895483] [2022-02-11 00:33:30,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:33:30,661 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:33:30,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:33:30,788 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:33:30,788 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:33:30,788 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1388895483] [2022-02-11 00:33:30,788 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1388895483] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:33:30,788 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [596562109] [2022-02-11 00:33:30,788 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-11 00:33:30,788 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:33:30,788 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:33:30,789 INFO L229 MonitoredProcess]: Starting monitored process 331 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:33:30,790 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (331)] Waiting until timeout for monitored process [2022-02-11 00:33:30,866 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-02-11 00:33:30,866 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:33:30,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 33 conjunts are in the unsatisfiable core [2022-02-11 00:33:30,867 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:33:31,238 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:33:31,238 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:33:31,492 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-11 00:33:31,492 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 31 treesize of output 26 [2022-02-11 00:33:31,556 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:33:31,556 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [596562109] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:33:31,556 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:33:31,556 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 28 [2022-02-11 00:33:31,556 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [659286582] [2022-02-11 00:33:31,556 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:33:31,556 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-02-11 00:33:31,556 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:33:31,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-02-11 00:33:31,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=661, Unknown=0, NotChecked=0, Total=756 [2022-02-11 00:33:31,557 INFO L87 Difference]: Start difference. First operand 1152 states and 3512 transitions. Second operand has 28 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 28 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) [2022-02-11 00:33:35,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:33:35,774 INFO L93 Difference]: Finished difference Result 1798 states and 4948 transitions. [2022-02-11 00:33:35,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-02-11 00:33:35,774 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 28 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 19 [2022-02-11 00:33:35,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:33:35,777 INFO L225 Difference]: With dead ends: 1798 [2022-02-11 00:33:35,777 INFO L226 Difference]: Without dead ends: 1795 [2022-02-11 00:33:35,777 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1402 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=985, Invalid=4867, Unknown=0, NotChecked=0, Total=5852 [2022-02-11 00:33:35,777 INFO L934 BasicCegarLoop]: 29 mSDtfsCounter, 362 mSDsluCounter, 758 mSDsCounter, 0 mSdLazyCounter, 1489 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 362 SdHoareTripleChecker+Valid, 403 SdHoareTripleChecker+Invalid, 1556 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 1489 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-11 00:33:35,777 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [362 Valid, 403 Invalid, 1556 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 1489 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-11 00:33:35,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1795 states. [2022-02-11 00:33:35,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1795 to 977. [2022-02-11 00:33:35,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 977 states, 976 states have (on average 2.9846311475409837) internal successors, (2913), 976 states have internal predecessors, (2913), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:33:35,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 977 states to 977 states and 2913 transitions. [2022-02-11 00:33:35,790 INFO L78 Accepts]: Start accepts. Automaton has 977 states and 2913 transitions. Word has length 19 [2022-02-11 00:33:35,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:33:35,790 INFO L470 AbstractCegarLoop]: Abstraction has 977 states and 2913 transitions. [2022-02-11 00:33:35,790 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 28 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) [2022-02-11 00:33:35,790 INFO L276 IsEmpty]: Start isEmpty. Operand 977 states and 2913 transitions. [2022-02-11 00:33:35,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-02-11 00:33:35,791 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:33:35,792 INFO L515 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:33:35,808 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (331)] Forceful destruction successful, exit code 0 [2022-02-11 00:33:35,992 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable338,331 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:33:35,992 INFO L402 AbstractCegarLoop]: === Iteration 340 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:33:35,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:33:35,992 INFO L85 PathProgramCache]: Analyzing trace with hash -2033793109, now seen corresponding path program 331 times [2022-02-11 00:33:35,992 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:33:35,992 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [636369790] [2022-02-11 00:33:35,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:33:35,992 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:33:36,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:33:36,121 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:33:36,121 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:33:36,121 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [636369790] [2022-02-11 00:33:36,121 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [636369790] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:33:36,121 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [896083815] [2022-02-11 00:33:36,121 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-11 00:33:36,121 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:33:36,121 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:33:36,122 INFO L229 MonitoredProcess]: Starting monitored process 332 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:33:36,122 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (332)] Waiting until timeout for monitored process [2022-02-11 00:33:36,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:33:36,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-11 00:33:36,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:33:36,495 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:33:36,495 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:33:36,711 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-11 00:33:36,711 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 31 treesize of output 26 [2022-02-11 00:33:36,750 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:33:36,750 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [896083815] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:33:36,750 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:33:36,750 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 27 [2022-02-11 00:33:36,750 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1682279447] [2022-02-11 00:33:36,750 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:33:36,750 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-11 00:33:36,750 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:33:36,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-11 00:33:36,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=622, Unknown=0, NotChecked=0, Total=702 [2022-02-11 00:33:36,751 INFO L87 Difference]: Start difference. First operand 977 states and 2913 transitions. Second operand has 27 states, 27 states have (on average 1.4074074074074074) internal successors, (38), 27 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) [2022-02-11 00:33:37,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:33:37,496 INFO L93 Difference]: Finished difference Result 1118 states and 3166 transitions. [2022-02-11 00:33:37,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-02-11 00:33:37,497 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.4074074074074074) internal successors, (38), 27 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 19 [2022-02-11 00:33:37,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:33:37,498 INFO L225 Difference]: With dead ends: 1118 [2022-02-11 00:33:37,498 INFO L226 Difference]: Without dead ends: 1118 [2022-02-11 00:33:37,498 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 279 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=216, Invalid=1590, Unknown=0, NotChecked=0, Total=1806 [2022-02-11 00:33:37,498 INFO L934 BasicCegarLoop]: 19 mSDtfsCounter, 175 mSDsluCounter, 514 mSDsCounter, 0 mSdLazyCounter, 827 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 175 SdHoareTripleChecker+Valid, 259 SdHoareTripleChecker+Invalid, 854 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 827 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-11 00:33:37,498 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [175 Valid, 259 Invalid, 854 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 827 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-11 00:33:37,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1118 states. [2022-02-11 00:33:37,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1118 to 970. [2022-02-11 00:33:37,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 970 states, 969 states have (on average 2.9834881320949433) internal successors, (2891), 969 states have internal predecessors, (2891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:33:37,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 970 states to 970 states and 2891 transitions. [2022-02-11 00:33:37,508 INFO L78 Accepts]: Start accepts. Automaton has 970 states and 2891 transitions. Word has length 19 [2022-02-11 00:33:37,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:33:37,508 INFO L470 AbstractCegarLoop]: Abstraction has 970 states and 2891 transitions. [2022-02-11 00:33:37,508 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.4074074074074074) internal successors, (38), 27 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) [2022-02-11 00:33:37,509 INFO L276 IsEmpty]: Start isEmpty. Operand 970 states and 2891 transitions. [2022-02-11 00:33:37,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-02-11 00:33:37,510 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:33:37,510 INFO L515 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:33:37,526 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (332)] Ended with exit code 0 [2022-02-11 00:33:37,710 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable339,332 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:33:37,710 INFO L402 AbstractCegarLoop]: === Iteration 341 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:33:37,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:33:37,710 INFO L85 PathProgramCache]: Analyzing trace with hash -1147994829, now seen corresponding path program 332 times [2022-02-11 00:33:37,710 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:33:37,710 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2109223573] [2022-02-11 00:33:37,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:33:37,711 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:33:37,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:33:37,824 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:33:37,824 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:33:37,824 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2109223573] [2022-02-11 00:33:37,824 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2109223573] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:33:37,824 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [487127727] [2022-02-11 00:33:37,824 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-11 00:33:37,824 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:33:37,824 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:33:37,825 INFO L229 MonitoredProcess]: Starting monitored process 333 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:33:37,826 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (333)] Waiting until timeout for monitored process [2022-02-11 00:33:37,899 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-11 00:33:37,899 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:33:37,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-11 00:33:37,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:33:38,171 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:33:38,172 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:33:38,393 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-11 00:33:38,393 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 31 treesize of output 26 [2022-02-11 00:33:38,433 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:33:38,434 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [487127727] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:33:38,434 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:33:38,434 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 27 [2022-02-11 00:33:38,434 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1318136222] [2022-02-11 00:33:38,434 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:33:38,434 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-11 00:33:38,434 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:33:38,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-11 00:33:38,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=624, Unknown=0, NotChecked=0, Total=702 [2022-02-11 00:33:38,434 INFO L87 Difference]: Start difference. First operand 970 states and 2891 transitions. Second operand has 27 states, 27 states have (on average 1.4074074074074074) internal successors, (38), 27 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) [2022-02-11 00:33:39,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:33:39,107 INFO L93 Difference]: Finished difference Result 1125 states and 3183 transitions. [2022-02-11 00:33:39,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-02-11 00:33:39,107 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.4074074074074074) internal successors, (38), 27 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 19 [2022-02-11 00:33:39,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:33:39,109 INFO L225 Difference]: With dead ends: 1125 [2022-02-11 00:33:39,109 INFO L226 Difference]: Without dead ends: 1125 [2022-02-11 00:33:39,109 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 256 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=215, Invalid=1591, Unknown=0, NotChecked=0, Total=1806 [2022-02-11 00:33:39,109 INFO L934 BasicCegarLoop]: 19 mSDtfsCounter, 186 mSDsluCounter, 415 mSDsCounter, 0 mSdLazyCounter, 668 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 186 SdHoareTripleChecker+Valid, 213 SdHoareTripleChecker+Invalid, 701 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 668 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-11 00:33:39,109 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [186 Valid, 213 Invalid, 701 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 668 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-11 00:33:39,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1125 states. [2022-02-11 00:33:39,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1125 to 970. [2022-02-11 00:33:39,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 970 states, 969 states have (on average 2.9834881320949433) internal successors, (2891), 969 states have internal predecessors, (2891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:33:39,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 970 states to 970 states and 2891 transitions. [2022-02-11 00:33:39,119 INFO L78 Accepts]: Start accepts. Automaton has 970 states and 2891 transitions. Word has length 19 [2022-02-11 00:33:39,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:33:39,119 INFO L470 AbstractCegarLoop]: Abstraction has 970 states and 2891 transitions. [2022-02-11 00:33:39,120 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.4074074074074074) internal successors, (38), 27 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) [2022-02-11 00:33:39,120 INFO L276 IsEmpty]: Start isEmpty. Operand 970 states and 2891 transitions. [2022-02-11 00:33:39,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-02-11 00:33:39,125 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:33:39,125 INFO L515 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:33:39,141 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (333)] Ended with exit code 0 [2022-02-11 00:33:39,325 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable340,333 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:33:39,325 INFO L402 AbstractCegarLoop]: === Iteration 342 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:33:39,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:33:39,326 INFO L85 PathProgramCache]: Analyzing trace with hash -303023377, now seen corresponding path program 333 times [2022-02-11 00:33:39,326 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:33:39,326 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1803190393] [2022-02-11 00:33:39,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:33:39,326 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:33:39,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:33:39,425 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:33:39,425 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:33:39,425 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1803190393] [2022-02-11 00:33:39,425 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1803190393] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:33:39,425 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1700562463] [2022-02-11 00:33:39,425 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-11 00:33:39,425 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:33:39,426 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:33:39,426 INFO L229 MonitoredProcess]: Starting monitored process 334 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:33:39,427 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (334)] Waiting until timeout for monitored process [2022-02-11 00:33:39,503 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-11 00:33:39,503 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:33:39,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-11 00:33:39,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:33:39,722 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:33:39,722 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:33:39,872 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-11 00:33:39,872 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 30 treesize of output 25 [2022-02-11 00:33:39,895 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:33:39,895 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1700562463] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:33:39,895 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:33:39,895 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 22 [2022-02-11 00:33:39,895 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1812277328] [2022-02-11 00:33:39,895 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:33:39,895 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-11 00:33:39,895 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:33:39,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-11 00:33:39,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=399, Unknown=0, NotChecked=0, Total=462 [2022-02-11 00:33:39,896 INFO L87 Difference]: Start difference. First operand 970 states and 2891 transitions. Second operand has 22 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:33:40,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:33:40,190 INFO L93 Difference]: Finished difference Result 1094 states and 3117 transitions. [2022-02-11 00:33:40,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-11 00:33:40,190 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-02-11 00:33:40,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:33:40,191 INFO L225 Difference]: With dead ends: 1094 [2022-02-11 00:33:40,191 INFO L226 Difference]: Without dead ends: 1094 [2022-02-11 00:33:40,192 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=77, Invalid=475, Unknown=0, NotChecked=0, Total=552 [2022-02-11 00:33:40,192 INFO L934 BasicCegarLoop]: 20 mSDtfsCounter, 121 mSDsluCounter, 555 mSDsCounter, 0 mSdLazyCounter, 744 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 256 SdHoareTripleChecker+Invalid, 749 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 744 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-11 00:33:40,192 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [121 Valid, 256 Invalid, 749 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 744 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-11 00:33:40,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1094 states. [2022-02-11 00:33:40,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1094 to 962. [2022-02-11 00:33:40,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 962 states, 961 states have (on average 2.9823100936524454) internal successors, (2866), 961 states have internal predecessors, (2866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:33:40,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 962 states to 962 states and 2866 transitions. [2022-02-11 00:33:40,207 INFO L78 Accepts]: Start accepts. Automaton has 962 states and 2866 transitions. Word has length 19 [2022-02-11 00:33:40,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:33:40,207 INFO L470 AbstractCegarLoop]: Abstraction has 962 states and 2866 transitions. [2022-02-11 00:33:40,207 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:33:40,207 INFO L276 IsEmpty]: Start isEmpty. Operand 962 states and 2866 transitions. [2022-02-11 00:33:40,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-11 00:33:40,208 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:33:40,208 INFO L515 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:33:40,224 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (334)] Forceful destruction successful, exit code 0 [2022-02-11 00:33:40,408 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable341,334 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:33:40,408 INFO L402 AbstractCegarLoop]: === Iteration 343 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:33:40,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:33:40,409 INFO L85 PathProgramCache]: Analyzing trace with hash -1843506877, now seen corresponding path program 334 times [2022-02-11 00:33:40,409 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:33:40,409 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1470733015] [2022-02-11 00:33:40,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:33:40,409 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:33:40,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:33:40,735 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:33:40,735 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:33:40,735 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1470733015] [2022-02-11 00:33:40,735 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1470733015] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:33:40,735 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [465912690] [2022-02-11 00:33:40,735 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-11 00:33:40,735 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:33:40,735 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:33:40,736 INFO L229 MonitoredProcess]: Starting monitored process 335 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:33:40,736 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (335)] Waiting until timeout for monitored process [2022-02-11 00:33:40,811 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-11 00:33:40,812 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:33:40,812 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 47 conjunts are in the unsatisfiable core [2022-02-11 00:33:40,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:33:41,284 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 59 [2022-02-11 00:33:41,286 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 47 [2022-02-11 00:33:41,389 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:33:41,389 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:33:41,824 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-11 00:33:41,825 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 115 treesize of output 98 [2022-02-11 00:33:41,828 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 95 treesize of output 75 [2022-02-11 00:33:41,939 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:33:41,939 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [465912690] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:33:41,939 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:33:41,939 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 34 [2022-02-11 00:33:41,940 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1065988127] [2022-02-11 00:33:41,940 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:33:41,940 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-02-11 00:33:41,940 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:33:41,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-02-11 00:33:41,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=1013, Unknown=0, NotChecked=0, Total=1122 [2022-02-11 00:33:41,940 INFO L87 Difference]: Start difference. First operand 962 states and 2866 transitions. Second operand has 34 states, 34 states have (on average 1.411764705882353) internal successors, (48), 34 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) [2022-02-11 00:33:42,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:33:42,579 INFO L93 Difference]: Finished difference Result 1092 states and 3154 transitions. [2022-02-11 00:33:42,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-11 00:33:42,579 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.411764705882353) internal successors, (48), 34 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 20 [2022-02-11 00:33:42,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:33:42,581 INFO L225 Difference]: With dead ends: 1092 [2022-02-11 00:33:42,581 INFO L226 Difference]: Without dead ends: 1073 [2022-02-11 00:33:42,581 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 253 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=213, Invalid=1347, Unknown=0, NotChecked=0, Total=1560 [2022-02-11 00:33:42,581 INFO L934 BasicCegarLoop]: 14 mSDtfsCounter, 140 mSDsluCounter, 681 mSDsCounter, 0 mSdLazyCounter, 947 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 289 SdHoareTripleChecker+Invalid, 976 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 947 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-11 00:33:42,581 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [140 Valid, 289 Invalid, 976 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 947 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-11 00:33:42,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1073 states. [2022-02-11 00:33:42,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1073 to 963. [2022-02-11 00:33:42,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 963 states, 962 states have (on average 2.9812889812889813) internal successors, (2868), 962 states have internal predecessors, (2868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:33:42,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 963 states to 963 states and 2868 transitions. [2022-02-11 00:33:42,592 INFO L78 Accepts]: Start accepts. Automaton has 963 states and 2868 transitions. Word has length 20 [2022-02-11 00:33:42,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:33:42,592 INFO L470 AbstractCegarLoop]: Abstraction has 963 states and 2868 transitions. [2022-02-11 00:33:42,592 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1.411764705882353) internal successors, (48), 34 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) [2022-02-11 00:33:42,592 INFO L276 IsEmpty]: Start isEmpty. Operand 963 states and 2868 transitions. [2022-02-11 00:33:42,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-11 00:33:42,593 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:33:42,593 INFO L515 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:33:42,609 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (335)] Forceful destruction successful, exit code 0 [2022-02-11 00:33:42,793 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 335 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable342 [2022-02-11 00:33:42,793 INFO L402 AbstractCegarLoop]: === Iteration 344 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:33:42,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:33:42,794 INFO L85 PathProgramCache]: Analyzing trace with hash -328414905, now seen corresponding path program 335 times [2022-02-11 00:33:42,794 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:33:42,794 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1197601274] [2022-02-11 00:33:42,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:33:42,794 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:33:42,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:33:43,201 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:33:43,202 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:33:43,202 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1197601274] [2022-02-11 00:33:43,202 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1197601274] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:33:43,202 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1588835879] [2022-02-11 00:33:43,202 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-11 00:33:43,202 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:33:43,202 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:33:43,203 INFO L229 MonitoredProcess]: Starting monitored process 336 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:33:43,203 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (336)] Waiting until timeout for monitored process [2022-02-11 00:33:43,280 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-11 00:33:43,281 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:33:43,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 47 conjunts are in the unsatisfiable core [2022-02-11 00:33:43,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:33:43,809 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 59 [2022-02-11 00:33:43,811 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 47 [2022-02-11 00:33:43,925 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:33:43,925 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:33:44,404 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-11 00:33:44,405 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 117 treesize of output 100 [2022-02-11 00:33:44,408 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 97 treesize of output 77 [2022-02-11 00:33:44,522 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:33:44,522 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1588835879] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:33:44,523 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:33:44,523 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 33 [2022-02-11 00:33:44,523 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1512026176] [2022-02-11 00:33:44,523 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:33:44,523 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-02-11 00:33:44,523 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:33:44,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-02-11 00:33:44,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=956, Unknown=0, NotChecked=0, Total=1056 [2022-02-11 00:33:44,523 INFO L87 Difference]: Start difference. First operand 963 states and 2868 transitions. Second operand has 33 states, 33 states have (on average 1.4242424242424243) internal successors, (47), 33 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) [2022-02-11 00:33:45,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:33:45,198 INFO L93 Difference]: Finished difference Result 1091 states and 3153 transitions. [2022-02-11 00:33:45,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-02-11 00:33:45,199 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.4242424242424243) internal successors, (47), 33 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 20 [2022-02-11 00:33:45,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:33:45,200 INFO L225 Difference]: With dead ends: 1091 [2022-02-11 00:33:45,200 INFO L226 Difference]: Without dead ends: 1074 [2022-02-11 00:33:45,200 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 237 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=190, Invalid=1292, Unknown=0, NotChecked=0, Total=1482 [2022-02-11 00:33:45,201 INFO L934 BasicCegarLoop]: 14 mSDtfsCounter, 114 mSDsluCounter, 681 mSDsCounter, 0 mSdLazyCounter, 1005 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 303 SdHoareTripleChecker+Invalid, 1045 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 1005 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-11 00:33:45,201 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 303 Invalid, 1045 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 1005 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-11 00:33:45,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1074 states. [2022-02-11 00:33:45,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1074 to 964. [2022-02-11 00:33:45,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 964 states, 963 states have (on average 2.980269989615784) internal successors, (2870), 963 states have internal predecessors, (2870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:33:45,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 964 states to 964 states and 2870 transitions. [2022-02-11 00:33:45,212 INFO L78 Accepts]: Start accepts. Automaton has 964 states and 2870 transitions. Word has length 20 [2022-02-11 00:33:45,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:33:45,212 INFO L470 AbstractCegarLoop]: Abstraction has 964 states and 2870 transitions. [2022-02-11 00:33:45,212 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.4242424242424243) internal successors, (47), 33 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) [2022-02-11 00:33:45,212 INFO L276 IsEmpty]: Start isEmpty. Operand 964 states and 2870 transitions. [2022-02-11 00:33:45,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-11 00:33:45,213 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:33:45,213 INFO L515 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:33:45,229 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (336)] Ended with exit code 0 [2022-02-11 00:33:45,413 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 336 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable343 [2022-02-11 00:33:45,414 INFO L402 AbstractCegarLoop]: === Iteration 345 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:33:45,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:33:45,414 INFO L85 PathProgramCache]: Analyzing trace with hash 1895672131, now seen corresponding path program 336 times [2022-02-11 00:33:45,414 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:33:45,414 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [545511034] [2022-02-11 00:33:45,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:33:45,414 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:33:45,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:33:45,842 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:33:45,842 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:33:45,842 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [545511034] [2022-02-11 00:33:45,842 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [545511034] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:33:45,842 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1280849472] [2022-02-11 00:33:45,842 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-11 00:33:45,842 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:33:45,843 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:33:45,843 INFO L229 MonitoredProcess]: Starting monitored process 337 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:33:45,844 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (337)] Waiting until timeout for monitored process [2022-02-11 00:33:45,919 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-11 00:33:45,920 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:33:45,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 49 conjunts are in the unsatisfiable core [2022-02-11 00:33:45,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:33:46,483 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 57 [2022-02-11 00:33:46,485 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 45 [2022-02-11 00:33:46,612 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:33:46,612 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:33:47,244 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-11 00:33:47,244 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 94 treesize of output 81 [2022-02-11 00:33:47,248 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 62 [2022-02-11 00:33:47,364 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:33:47,364 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1280849472] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:33:47,364 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:33:47,364 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 34 [2022-02-11 00:33:47,364 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [77877086] [2022-02-11 00:33:47,364 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:33:47,364 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-02-11 00:33:47,364 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:33:47,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-02-11 00:33:47,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=1010, Unknown=0, NotChecked=0, Total=1122 [2022-02-11 00:33:47,365 INFO L87 Difference]: Start difference. First operand 964 states and 2870 transitions. Second operand has 34 states, 34 states have (on average 1.411764705882353) internal successors, (48), 34 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) [2022-02-11 00:33:49,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:33:49,407 INFO L93 Difference]: Finished difference Result 1244 states and 3512 transitions. [2022-02-11 00:33:49,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-02-11 00:33:49,407 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.411764705882353) internal successors, (48), 34 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 20 [2022-02-11 00:33:49,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:33:49,409 INFO L225 Difference]: With dead ends: 1244 [2022-02-11 00:33:49,409 INFO L226 Difference]: Without dead ends: 1208 [2022-02-11 00:33:49,409 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 571 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=388, Invalid=2582, Unknown=0, NotChecked=0, Total=2970 [2022-02-11 00:33:49,409 INFO L934 BasicCegarLoop]: 16 mSDtfsCounter, 217 mSDsluCounter, 678 mSDsCounter, 0 mSdLazyCounter, 1222 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 217 SdHoareTripleChecker+Valid, 353 SdHoareTripleChecker+Invalid, 1281 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 1222 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-11 00:33:49,409 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [217 Valid, 353 Invalid, 1281 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 1222 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-11 00:33:49,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1208 states. [2022-02-11 00:33:49,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1208 to 971. [2022-02-11 00:33:49,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 971 states, 970 states have (on average 2.9804123711340207) internal successors, (2891), 970 states have internal predecessors, (2891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:33:49,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 971 states to 971 states and 2891 transitions. [2022-02-11 00:33:49,420 INFO L78 Accepts]: Start accepts. Automaton has 971 states and 2891 transitions. Word has length 20 [2022-02-11 00:33:49,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:33:49,421 INFO L470 AbstractCegarLoop]: Abstraction has 971 states and 2891 transitions. [2022-02-11 00:33:49,421 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1.411764705882353) internal successors, (48), 34 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) [2022-02-11 00:33:49,421 INFO L276 IsEmpty]: Start isEmpty. Operand 971 states and 2891 transitions. [2022-02-11 00:33:49,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-11 00:33:49,422 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:33:49,422 INFO L515 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:33:49,438 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (337)] Ended with exit code 0 [2022-02-11 00:33:49,622 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 337 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable344 [2022-02-11 00:33:49,622 INFO L402 AbstractCegarLoop]: === Iteration 346 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:33:49,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:33:49,622 INFO L85 PathProgramCache]: Analyzing trace with hash 944518803, now seen corresponding path program 337 times [2022-02-11 00:33:49,622 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:33:49,623 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [538120931] [2022-02-11 00:33:49,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:33:49,623 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:33:49,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:33:49,900 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:33:49,900 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:33:49,900 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [538120931] [2022-02-11 00:33:49,900 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [538120931] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:33:49,900 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1830006877] [2022-02-11 00:33:49,900 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-11 00:33:49,900 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:33:49,900 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:33:49,901 INFO L229 MonitoredProcess]: Starting monitored process 338 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:33:49,901 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (338)] Waiting until timeout for monitored process [2022-02-11 00:33:49,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:33:49,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 49 conjunts are in the unsatisfiable core [2022-02-11 00:33:49,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:33:50,513 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 59 [2022-02-11 00:33:50,515 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 47 [2022-02-11 00:33:50,679 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:33:50,680 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:33:51,165 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-02-11 00:33:51,166 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 147 treesize of output 120 [2022-02-11 00:33:51,169 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 115 treesize of output 83 [2022-02-11 00:33:51,338 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:33:51,338 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1830006877] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:33:51,338 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:33:51,338 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 36 [2022-02-11 00:33:51,338 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [578178219] [2022-02-11 00:33:51,338 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:33:51,338 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-02-11 00:33:51,339 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:33:51,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-02-11 00:33:51,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=1152, Unknown=0, NotChecked=0, Total=1260 [2022-02-11 00:33:51,339 INFO L87 Difference]: Start difference. First operand 971 states and 2891 transitions. Second operand has 36 states, 36 states have (on average 1.3611111111111112) internal successors, (49), 36 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) [2022-02-11 00:33:52,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:33:52,491 INFO L93 Difference]: Finished difference Result 1052 states and 3047 transitions. [2022-02-11 00:33:52,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-02-11 00:33:52,492 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.3611111111111112) internal successors, (49), 36 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 20 [2022-02-11 00:33:52,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:33:52,493 INFO L225 Difference]: With dead ends: 1052 [2022-02-11 00:33:52,493 INFO L226 Difference]: Without dead ends: 1028 [2022-02-11 00:33:52,493 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 342 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=241, Invalid=2309, Unknown=0, NotChecked=0, Total=2550 [2022-02-11 00:33:52,494 INFO L934 BasicCegarLoop]: 15 mSDtfsCounter, 116 mSDsluCounter, 686 mSDsCounter, 0 mSdLazyCounter, 1397 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 388 SdHoareTripleChecker+Invalid, 1462 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 1397 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-11 00:33:52,494 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [116 Valid, 388 Invalid, 1462 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 1397 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-11 00:33:52,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1028 states. [2022-02-11 00:33:52,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1028 to 976. [2022-02-11 00:33:52,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 976 states, 975 states have (on average 2.9753846153846153) internal successors, (2901), 975 states have internal predecessors, (2901), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:33:52,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 976 states to 976 states and 2901 transitions. [2022-02-11 00:33:52,504 INFO L78 Accepts]: Start accepts. Automaton has 976 states and 2901 transitions. Word has length 20 [2022-02-11 00:33:52,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:33:52,504 INFO L470 AbstractCegarLoop]: Abstraction has 976 states and 2901 transitions. [2022-02-11 00:33:52,504 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 1.3611111111111112) internal successors, (49), 36 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) [2022-02-11 00:33:52,504 INFO L276 IsEmpty]: Start isEmpty. Operand 976 states and 2901 transitions. [2022-02-11 00:33:52,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-11 00:33:52,505 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:33:52,505 INFO L515 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:33:52,523 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (338)] Ended with exit code 0 [2022-02-11 00:33:52,705 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 338 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable345 [2022-02-11 00:33:52,705 INFO L402 AbstractCegarLoop]: === Iteration 347 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:33:52,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:33:52,706 INFO L85 PathProgramCache]: Analyzing trace with hash -1126361457, now seen corresponding path program 338 times [2022-02-11 00:33:52,706 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:33:52,706 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [411721055] [2022-02-11 00:33:52,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:33:52,706 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:33:52,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:33:52,986 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:33:52,987 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:33:52,987 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [411721055] [2022-02-11 00:33:52,987 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [411721055] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:33:52,987 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [361182995] [2022-02-11 00:33:52,987 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-11 00:33:52,987 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:33:52,987 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:33:52,988 INFO L229 MonitoredProcess]: Starting monitored process 339 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:33:52,988 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (339)] Waiting until timeout for monitored process [2022-02-11 00:33:53,062 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-11 00:33:53,063 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:33:53,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 51 conjunts are in the unsatisfiable core [2022-02-11 00:33:53,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:33:53,726 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 87 treesize of output 71 [2022-02-11 00:33:53,729 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 47 [2022-02-11 00:33:53,852 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:33:53,852 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:33:54,759 INFO L353 Elim1Store]: treesize reduction 22, result has 24.1 percent of original size [2022-02-11 00:33:54,759 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 96 treesize of output 74 [2022-02-11 00:33:54,761 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:33:54,761 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 33 [2022-02-11 00:33:54,824 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:33:54,824 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [361182995] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:33:54,824 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:33:54,824 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 37 [2022-02-11 00:33:54,824 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [82210849] [2022-02-11 00:33:54,824 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:33:54,824 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-02-11 00:33:54,824 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:33:54,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-02-11 00:33:54,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=1201, Unknown=0, NotChecked=0, Total=1332 [2022-02-11 00:33:54,825 INFO L87 Difference]: Start difference. First operand 976 states and 2901 transitions. Second operand has 37 states, 37 states have (on average 1.3513513513513513) internal successors, (50), 37 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) [2022-02-11 00:33:58,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:33:58,125 INFO L93 Difference]: Finished difference Result 1284 states and 3588 transitions. [2022-02-11 00:33:58,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-02-11 00:33:58,125 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.3513513513513513) internal successors, (50), 37 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 20 [2022-02-11 00:33:58,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:33:58,127 INFO L225 Difference]: With dead ends: 1284 [2022-02-11 00:33:58,127 INFO L226 Difference]: Without dead ends: 1248 [2022-02-11 00:33:58,128 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1074 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=533, Invalid=4869, Unknown=0, NotChecked=0, Total=5402 [2022-02-11 00:33:58,128 INFO L934 BasicCegarLoop]: 19 mSDtfsCounter, 140 mSDsluCounter, 761 mSDsCounter, 0 mSdLazyCounter, 1381 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 465 SdHoareTripleChecker+Invalid, 1450 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 1381 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-11 00:33:58,128 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [140 Valid, 465 Invalid, 1450 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 1381 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-11 00:33:58,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1248 states. [2022-02-11 00:33:58,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1248 to 978. [2022-02-11 00:33:58,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 978 states, 977 states have (on average 2.9744114636642784) internal successors, (2906), 977 states have internal predecessors, (2906), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:33:58,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 978 states to 978 states and 2906 transitions. [2022-02-11 00:33:58,139 INFO L78 Accepts]: Start accepts. Automaton has 978 states and 2906 transitions. Word has length 20 [2022-02-11 00:33:58,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:33:58,140 INFO L470 AbstractCegarLoop]: Abstraction has 978 states and 2906 transitions. [2022-02-11 00:33:58,140 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.3513513513513513) internal successors, (50), 37 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) [2022-02-11 00:33:58,140 INFO L276 IsEmpty]: Start isEmpty. Operand 978 states and 2906 transitions. [2022-02-11 00:33:58,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-11 00:33:58,141 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:33:58,141 INFO L515 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:33:58,157 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (339)] Ended with exit code 0 [2022-02-11 00:33:58,341 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable346,339 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:33:58,341 INFO L402 AbstractCegarLoop]: === Iteration 348 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:33:58,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:33:58,341 INFO L85 PathProgramCache]: Analyzing trace with hash -84785389, now seen corresponding path program 339 times [2022-02-11 00:33:58,342 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:33:58,342 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1150132248] [2022-02-11 00:33:58,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:33:58,342 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:33:58,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:33:58,764 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:33:58,764 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:33:58,764 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1150132248] [2022-02-11 00:33:58,764 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1150132248] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:33:58,764 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1313020411] [2022-02-11 00:33:58,764 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-11 00:33:58,765 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:33:58,765 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:33:58,765 INFO L229 MonitoredProcess]: Starting monitored process 340 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:33:58,766 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (340)] Waiting until timeout for monitored process [2022-02-11 00:33:58,844 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-11 00:33:58,844 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:33:58,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 49 conjunts are in the unsatisfiable core [2022-02-11 00:33:58,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:33:59,447 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 59 [2022-02-11 00:33:59,449 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 47 [2022-02-11 00:33:59,570 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:33:59,570 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:34:00,155 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-02-11 00:34:00,155 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 144 treesize of output 117 [2022-02-11 00:34:00,158 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 112 treesize of output 80 [2022-02-11 00:34:00,332 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:34:00,332 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1313020411] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:34:00,332 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:34:00,332 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 36 [2022-02-11 00:34:00,332 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635536878] [2022-02-11 00:34:00,332 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:34:00,332 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-02-11 00:34:00,332 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:34:00,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-02-11 00:34:00,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=1151, Unknown=0, NotChecked=0, Total=1260 [2022-02-11 00:34:00,333 INFO L87 Difference]: Start difference. First operand 978 states and 2906 transitions. Second operand has 36 states, 36 states have (on average 1.3611111111111112) internal successors, (49), 36 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) [2022-02-11 00:34:01,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:34:01,369 INFO L93 Difference]: Finished difference Result 1054 states and 3054 transitions. [2022-02-11 00:34:01,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-02-11 00:34:01,369 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.3611111111111112) internal successors, (49), 36 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 20 [2022-02-11 00:34:01,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:34:01,371 INFO L225 Difference]: With dead ends: 1054 [2022-02-11 00:34:01,371 INFO L226 Difference]: Without dead ends: 1034 [2022-02-11 00:34:01,371 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 333 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=217, Invalid=2135, Unknown=0, NotChecked=0, Total=2352 [2022-02-11 00:34:01,371 INFO L934 BasicCegarLoop]: 15 mSDtfsCounter, 87 mSDsluCounter, 669 mSDsCounter, 0 mSdLazyCounter, 1297 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 374 SdHoareTripleChecker+Invalid, 1352 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 1297 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-11 00:34:01,371 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 374 Invalid, 1352 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 1297 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-11 00:34:01,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1034 states. [2022-02-11 00:34:01,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1034 to 980. [2022-02-11 00:34:01,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 980 states, 979 states have (on average 2.9734422880490294) internal successors, (2911), 979 states have internal predecessors, (2911), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:34:01,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 980 states to 980 states and 2911 transitions. [2022-02-11 00:34:01,381 INFO L78 Accepts]: Start accepts. Automaton has 980 states and 2911 transitions. Word has length 20 [2022-02-11 00:34:01,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:34:01,381 INFO L470 AbstractCegarLoop]: Abstraction has 980 states and 2911 transitions. [2022-02-11 00:34:01,382 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 1.3611111111111112) internal successors, (49), 36 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) [2022-02-11 00:34:01,382 INFO L276 IsEmpty]: Start isEmpty. Operand 980 states and 2911 transitions. [2022-02-11 00:34:01,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-11 00:34:01,383 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:34:01,383 INFO L515 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:34:01,399 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (340)] Forceful destruction successful, exit code 0 [2022-02-11 00:34:01,583 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable347,340 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:34:01,583 INFO L402 AbstractCegarLoop]: === Iteration 349 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:34:01,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:34:01,583 INFO L85 PathProgramCache]: Analyzing trace with hash -51186161, now seen corresponding path program 340 times [2022-02-11 00:34:01,583 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:34:01,583 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1541328645] [2022-02-11 00:34:01,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:34:01,584 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:34:01,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:34:01,914 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:34:01,914 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:34:01,914 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1541328645] [2022-02-11 00:34:01,915 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1541328645] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:34:01,915 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1884519584] [2022-02-11 00:34:01,915 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-11 00:34:01,915 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:34:01,915 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:34:01,916 INFO L229 MonitoredProcess]: Starting monitored process 341 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:34:01,916 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (341)] Waiting until timeout for monitored process [2022-02-11 00:34:01,999 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-11 00:34:01,999 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:34:02,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 49 conjunts are in the unsatisfiable core [2022-02-11 00:34:02,000 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:34:02,632 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 59 [2022-02-11 00:34:02,634 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 47 [2022-02-11 00:34:02,757 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:34:02,757 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:34:03,338 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-02-11 00:34:03,338 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 147 treesize of output 120 [2022-02-11 00:34:03,341 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 115 treesize of output 83 [2022-02-11 00:34:03,508 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:34:03,508 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1884519584] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:34:03,509 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:34:03,509 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 36 [2022-02-11 00:34:03,509 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047753808] [2022-02-11 00:34:03,509 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:34:03,509 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-02-11 00:34:03,509 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:34:03,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-02-11 00:34:03,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=1148, Unknown=0, NotChecked=0, Total=1260 [2022-02-11 00:34:03,509 INFO L87 Difference]: Start difference. First operand 980 states and 2911 transitions. Second operand has 36 states, 36 states have (on average 1.3611111111111112) internal successors, (49), 36 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) [2022-02-11 00:34:05,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:34:05,207 INFO L93 Difference]: Finished difference Result 1097 states and 3133 transitions. [2022-02-11 00:34:05,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-02-11 00:34:05,207 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.3611111111111112) internal successors, (49), 36 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 20 [2022-02-11 00:34:05,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:34:05,209 INFO L225 Difference]: With dead ends: 1097 [2022-02-11 00:34:05,209 INFO L226 Difference]: Without dead ends: 1070 [2022-02-11 00:34:05,209 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 355 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=271, Invalid=2279, Unknown=0, NotChecked=0, Total=2550 [2022-02-11 00:34:05,209 INFO L934 BasicCegarLoop]: 14 mSDtfsCounter, 197 mSDsluCounter, 661 mSDsCounter, 0 mSdLazyCounter, 1311 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 197 SdHoareTripleChecker+Valid, 377 SdHoareTripleChecker+Invalid, 1393 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 1311 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-11 00:34:05,209 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [197 Valid, 377 Invalid, 1393 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 1311 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-11 00:34:05,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1070 states. [2022-02-11 00:34:05,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1070 to 984. [2022-02-11 00:34:05,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 984 states, 983 states have (on average 2.9745676500508647) internal successors, (2924), 983 states have internal predecessors, (2924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:34:05,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 984 states to 984 states and 2924 transitions. [2022-02-11 00:34:05,220 INFO L78 Accepts]: Start accepts. Automaton has 984 states and 2924 transitions. Word has length 20 [2022-02-11 00:34:05,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:34:05,220 INFO L470 AbstractCegarLoop]: Abstraction has 984 states and 2924 transitions. [2022-02-11 00:34:05,220 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 1.3611111111111112) internal successors, (49), 36 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) [2022-02-11 00:34:05,220 INFO L276 IsEmpty]: Start isEmpty. Operand 984 states and 2924 transitions. [2022-02-11 00:34:05,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-11 00:34:05,221 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:34:05,221 INFO L515 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:34:05,237 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (341)] Ended with exit code 0 [2022-02-11 00:34:05,421 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable348,341 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:34:05,421 INFO L402 AbstractCegarLoop]: === Iteration 350 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:34:05,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:34:05,421 INFO L85 PathProgramCache]: Analyzing trace with hash 2028107667, now seen corresponding path program 341 times [2022-02-11 00:34:05,421 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:34:05,422 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [357124605] [2022-02-11 00:34:05,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:34:05,422 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:34:05,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:34:05,715 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:34:05,716 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:34:05,716 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [357124605] [2022-02-11 00:34:05,716 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [357124605] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:34:05,716 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [386079837] [2022-02-11 00:34:05,716 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-11 00:34:05,716 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:34:05,716 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:34:05,717 INFO L229 MonitoredProcess]: Starting monitored process 342 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:34:05,717 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (342)] Waiting until timeout for monitored process [2022-02-11 00:34:05,804 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-02-11 00:34:05,804 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:34:05,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 49 conjunts are in the unsatisfiable core [2022-02-11 00:34:05,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:34:06,335 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 104 treesize of output 88 [2022-02-11 00:34:06,338 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 88 treesize of output 72 [2022-02-11 00:34:06,625 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:34:06,625 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:34:07,204 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-02-11 00:34:07,204 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 124 treesize of output 105 [2022-02-11 00:34:07,207 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 100 treesize of output 76 [2022-02-11 00:34:07,366 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:34:07,366 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [386079837] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:34:07,366 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:34:07,366 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 36 [2022-02-11 00:34:07,366 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [224734279] [2022-02-11 00:34:07,366 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:34:07,366 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-02-11 00:34:07,367 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:34:07,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-02-11 00:34:07,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=1147, Unknown=0, NotChecked=0, Total=1260 [2022-02-11 00:34:07,367 INFO L87 Difference]: Start difference. First operand 984 states and 2924 transitions. Second operand has 36 states, 36 states have (on average 1.3611111111111112) internal successors, (49), 36 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) [2022-02-11 00:34:09,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:34:09,185 INFO L93 Difference]: Finished difference Result 1123 states and 3163 transitions. [2022-02-11 00:34:09,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-02-11 00:34:09,186 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.3611111111111112) internal successors, (49), 36 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 20 [2022-02-11 00:34:09,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:34:09,187 INFO L225 Difference]: With dead ends: 1123 [2022-02-11 00:34:09,187 INFO L226 Difference]: Without dead ends: 1088 [2022-02-11 00:34:09,188 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 377 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=302, Invalid=2350, Unknown=0, NotChecked=0, Total=2652 [2022-02-11 00:34:09,188 INFO L934 BasicCegarLoop]: 21 mSDtfsCounter, 256 mSDsluCounter, 784 mSDsCounter, 0 mSdLazyCounter, 1335 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 256 SdHoareTripleChecker+Valid, 474 SdHoareTripleChecker+Invalid, 1431 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 1335 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-11 00:34:09,188 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [256 Valid, 474 Invalid, 1431 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 1335 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-11 00:34:09,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1088 states. [2022-02-11 00:34:09,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1088 to 987. [2022-02-11 00:34:09,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 987 states, 986 states have (on average 2.9726166328600407) internal successors, (2931), 986 states have internal predecessors, (2931), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:34:09,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 987 states to 987 states and 2931 transitions. [2022-02-11 00:34:09,198 INFO L78 Accepts]: Start accepts. Automaton has 987 states and 2931 transitions. Word has length 20 [2022-02-11 00:34:09,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:34:09,198 INFO L470 AbstractCegarLoop]: Abstraction has 987 states and 2931 transitions. [2022-02-11 00:34:09,198 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 1.3611111111111112) internal successors, (49), 36 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) [2022-02-11 00:34:09,198 INFO L276 IsEmpty]: Start isEmpty. Operand 987 states and 2931 transitions. [2022-02-11 00:34:09,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-11 00:34:09,199 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:34:09,199 INFO L515 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:34:09,216 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (342)] Forceful destruction successful, exit code 0 [2022-02-11 00:34:09,400 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 342 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable349 [2022-02-11 00:34:09,400 INFO L402 AbstractCegarLoop]: === Iteration 351 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:34:09,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:34:09,400 INFO L85 PathProgramCache]: Analyzing trace with hash 563581447, now seen corresponding path program 342 times [2022-02-11 00:34:09,400 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:34:09,400 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [144235333] [2022-02-11 00:34:09,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:34:09,400 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:34:09,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:34:09,681 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:34:09,681 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:34:09,682 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [144235333] [2022-02-11 00:34:09,682 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [144235333] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:34:09,682 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1809949370] [2022-02-11 00:34:09,682 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-11 00:34:09,682 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:34:09,682 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:34:09,683 INFO L229 MonitoredProcess]: Starting monitored process 343 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:34:09,683 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (343)] Waiting until timeout for monitored process [2022-02-11 00:34:09,760 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-11 00:34:09,760 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:34:09,761 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 49 conjunts are in the unsatisfiable core [2022-02-11 00:34:09,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:34:10,296 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 57 [2022-02-11 00:34:10,298 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 45 [2022-02-11 00:34:10,417 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:34:10,418 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:34:10,850 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-02-11 00:34:10,850 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 147 treesize of output 120 [2022-02-11 00:34:10,853 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 115 treesize of output 83 [2022-02-11 00:34:11,037 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:34:11,037 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1809949370] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:34:11,037 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:34:11,038 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 36 [2022-02-11 00:34:11,038 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1975845389] [2022-02-11 00:34:11,038 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:34:11,038 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-02-11 00:34:11,038 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:34:11,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-02-11 00:34:11,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=1144, Unknown=0, NotChecked=0, Total=1260 [2022-02-11 00:34:11,038 INFO L87 Difference]: Start difference. First operand 987 states and 2931 transitions. Second operand has 36 states, 36 states have (on average 1.3611111111111112) internal successors, (49), 36 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) [2022-02-11 00:34:12,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:34:12,513 INFO L93 Difference]: Finished difference Result 1147 states and 3233 transitions. [2022-02-11 00:34:12,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-02-11 00:34:12,513 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.3611111111111112) internal successors, (49), 36 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 20 [2022-02-11 00:34:12,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:34:12,515 INFO L225 Difference]: With dead ends: 1147 [2022-02-11 00:34:12,515 INFO L226 Difference]: Without dead ends: 1125 [2022-02-11 00:34:12,515 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 538 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=320, Invalid=2872, Unknown=0, NotChecked=0, Total=3192 [2022-02-11 00:34:12,515 INFO L934 BasicCegarLoop]: 17 mSDtfsCounter, 173 mSDsluCounter, 821 mSDsCounter, 0 mSdLazyCounter, 1380 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 173 SdHoareTripleChecker+Valid, 465 SdHoareTripleChecker+Invalid, 1458 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 1380 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-11 00:34:12,515 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [173 Valid, 465 Invalid, 1458 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 1380 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-11 00:34:12,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1125 states. [2022-02-11 00:34:12,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1125 to 998. [2022-02-11 00:34:12,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 998 states, 997 states have (on average 2.973921765295888) internal successors, (2965), 997 states have internal predecessors, (2965), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:34:12,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 998 states to 998 states and 2965 transitions. [2022-02-11 00:34:12,526 INFO L78 Accepts]: Start accepts. Automaton has 998 states and 2965 transitions. Word has length 20 [2022-02-11 00:34:12,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:34:12,526 INFO L470 AbstractCegarLoop]: Abstraction has 998 states and 2965 transitions. [2022-02-11 00:34:12,526 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 1.3611111111111112) internal successors, (49), 36 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) [2022-02-11 00:34:12,526 INFO L276 IsEmpty]: Start isEmpty. Operand 998 states and 2965 transitions. [2022-02-11 00:34:12,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-11 00:34:12,527 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:34:12,527 INFO L515 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:34:12,543 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (343)] Ended with exit code 0 [2022-02-11 00:34:12,727 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable350,343 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:34:12,727 INFO L402 AbstractCegarLoop]: === Iteration 352 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:34:12,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:34:12,727 INFO L85 PathProgramCache]: Analyzing trace with hash 1605157515, now seen corresponding path program 343 times [2022-02-11 00:34:12,728 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:34:12,728 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1835114053] [2022-02-11 00:34:12,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:34:12,728 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:34:12,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:34:13,129 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:34:13,129 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:34:13,129 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1835114053] [2022-02-11 00:34:13,129 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1835114053] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:34:13,129 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [864542764] [2022-02-11 00:34:13,129 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-11 00:34:13,130 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:34:13,130 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:34:13,130 INFO L229 MonitoredProcess]: Starting monitored process 344 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:34:13,131 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (344)] Waiting until timeout for monitored process [2022-02-11 00:34:13,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:34:13,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 49 conjunts are in the unsatisfiable core [2022-02-11 00:34:13,208 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:34:13,801 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 57 [2022-02-11 00:34:13,803 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 45 [2022-02-11 00:34:13,922 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:34:13,923 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:34:14,392 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-02-11 00:34:14,392 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 147 treesize of output 120 [2022-02-11 00:34:14,395 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 115 treesize of output 83 [2022-02-11 00:34:14,597 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:34:14,598 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [864542764] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:34:14,598 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:34:14,598 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 36 [2022-02-11 00:34:14,598 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [434652907] [2022-02-11 00:34:14,598 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:34:14,598 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-02-11 00:34:14,598 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:34:14,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-02-11 00:34:14,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=1147, Unknown=0, NotChecked=0, Total=1260 [2022-02-11 00:34:14,598 INFO L87 Difference]: Start difference. First operand 998 states and 2965 transitions. Second operand has 36 states, 36 states have (on average 1.3611111111111112) internal successors, (49), 36 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) [2022-02-11 00:34:16,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:34:16,271 INFO L93 Difference]: Finished difference Result 1145 states and 3230 transitions. [2022-02-11 00:34:16,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-02-11 00:34:16,271 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.3611111111111112) internal successors, (49), 36 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 20 [2022-02-11 00:34:16,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:34:16,273 INFO L225 Difference]: With dead ends: 1145 [2022-02-11 00:34:16,273 INFO L226 Difference]: Without dead ends: 1125 [2022-02-11 00:34:16,273 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 546 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=316, Invalid=2876, Unknown=0, NotChecked=0, Total=3192 [2022-02-11 00:34:16,273 INFO L934 BasicCegarLoop]: 19 mSDtfsCounter, 175 mSDsluCounter, 828 mSDsCounter, 0 mSdLazyCounter, 1455 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 175 SdHoareTripleChecker+Valid, 474 SdHoareTripleChecker+Invalid, 1535 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 1455 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-11 00:34:16,273 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [175 Valid, 474 Invalid, 1535 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 1455 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-11 00:34:16,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1125 states. [2022-02-11 00:34:16,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1125 to 1000. [2022-02-11 00:34:16,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1000 states, 999 states have (on average 2.973973973973974) internal successors, (2971), 999 states have internal predecessors, (2971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:34:16,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1000 states to 1000 states and 2971 transitions. [2022-02-11 00:34:16,291 INFO L78 Accepts]: Start accepts. Automaton has 1000 states and 2971 transitions. Word has length 20 [2022-02-11 00:34:16,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:34:16,291 INFO L470 AbstractCegarLoop]: Abstraction has 1000 states and 2971 transitions. [2022-02-11 00:34:16,291 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 1.3611111111111112) internal successors, (49), 36 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) [2022-02-11 00:34:16,291 INFO L276 IsEmpty]: Start isEmpty. Operand 1000 states and 2971 transitions. [2022-02-11 00:34:16,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-11 00:34:16,292 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:34:16,292 INFO L515 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:34:16,308 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (344)] Forceful destruction successful, exit code 0 [2022-02-11 00:34:16,493 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable351,344 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:34:16,493 INFO L402 AbstractCegarLoop]: === Iteration 353 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:34:16,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:34:16,493 INFO L85 PathProgramCache]: Analyzing trace with hash 1638756743, now seen corresponding path program 344 times [2022-02-11 00:34:16,493 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:34:16,493 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1571476999] [2022-02-11 00:34:16,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:34:16,493 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:34:16,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:34:16,846 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:34:16,846 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:34:16,846 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1571476999] [2022-02-11 00:34:16,847 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1571476999] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:34:16,847 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [217783816] [2022-02-11 00:34:16,847 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-11 00:34:16,847 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:34:16,847 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:34:16,848 INFO L229 MonitoredProcess]: Starting monitored process 345 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:34:16,848 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (345)] Waiting until timeout for monitored process [2022-02-11 00:34:16,927 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-11 00:34:16,927 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:34:16,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 49 conjunts are in the unsatisfiable core [2022-02-11 00:34:16,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:34:17,574 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 57 [2022-02-11 00:34:17,576 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 45 [2022-02-11 00:34:17,705 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:34:17,705 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:34:18,214 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-02-11 00:34:18,214 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 144 treesize of output 117 [2022-02-11 00:34:18,218 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 112 treesize of output 80 [2022-02-11 00:34:18,401 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:34:18,402 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [217783816] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:34:18,402 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:34:18,402 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 36 [2022-02-11 00:34:18,402 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [967385332] [2022-02-11 00:34:18,402 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:34:18,402 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-02-11 00:34:18,402 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:34:18,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-02-11 00:34:18,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=1147, Unknown=0, NotChecked=0, Total=1260 [2022-02-11 00:34:18,402 INFO L87 Difference]: Start difference. First operand 1000 states and 2971 transitions. Second operand has 36 states, 36 states have (on average 1.3611111111111112) internal successors, (49), 36 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) [2022-02-11 00:34:21,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:34:21,133 INFO L93 Difference]: Finished difference Result 1221 states and 3373 transitions. [2022-02-11 00:34:21,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-02-11 00:34:21,133 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.3611111111111112) internal successors, (49), 36 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 20 [2022-02-11 00:34:21,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:34:21,135 INFO L225 Difference]: With dead ends: 1221 [2022-02-11 00:34:21,135 INFO L226 Difference]: Without dead ends: 1189 [2022-02-11 00:34:21,135 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 898 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=434, Invalid=4122, Unknown=0, NotChecked=0, Total=4556 [2022-02-11 00:34:21,135 INFO L934 BasicCegarLoop]: 17 mSDtfsCounter, 197 mSDsluCounter, 768 mSDsCounter, 0 mSdLazyCounter, 1433 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 197 SdHoareTripleChecker+Valid, 461 SdHoareTripleChecker+Invalid, 1525 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 1433 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-11 00:34:21,135 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [197 Valid, 461 Invalid, 1525 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 1433 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-11 00:34:21,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1189 states. [2022-02-11 00:34:21,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1189 to 1004. [2022-02-11 00:34:21,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1004 states, 1003 states have (on average 2.975074775672981) internal successors, (2984), 1003 states have internal predecessors, (2984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:34:21,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1004 states to 1004 states and 2984 transitions. [2022-02-11 00:34:21,146 INFO L78 Accepts]: Start accepts. Automaton has 1004 states and 2984 transitions. Word has length 20 [2022-02-11 00:34:21,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:34:21,147 INFO L470 AbstractCegarLoop]: Abstraction has 1004 states and 2984 transitions. [2022-02-11 00:34:21,147 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 1.3611111111111112) internal successors, (49), 36 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) [2022-02-11 00:34:21,147 INFO L276 IsEmpty]: Start isEmpty. Operand 1004 states and 2984 transitions. [2022-02-11 00:34:21,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-11 00:34:21,148 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:34:21,148 INFO L515 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:34:21,164 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (345)] Forceful destruction successful, exit code 0 [2022-02-11 00:34:21,348 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable352,345 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:34:21,348 INFO L402 AbstractCegarLoop]: === Iteration 354 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:34:21,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:34:21,349 INFO L85 PathProgramCache]: Analyzing trace with hash -576916725, now seen corresponding path program 345 times [2022-02-11 00:34:21,349 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:34:21,349 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1050320439] [2022-02-11 00:34:21,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:34:21,349 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:34:21,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:34:21,616 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:34:21,616 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:34:21,616 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1050320439] [2022-02-11 00:34:21,616 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1050320439] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:34:21,616 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2016083052] [2022-02-11 00:34:21,616 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-11 00:34:21,617 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:34:21,617 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:34:21,617 INFO L229 MonitoredProcess]: Starting monitored process 346 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:34:21,618 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (346)] Waiting until timeout for monitored process [2022-02-11 00:34:21,694 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-11 00:34:21,695 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:34:21,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 50 conjunts are in the unsatisfiable core [2022-02-11 00:34:21,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:34:22,353 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 120 treesize of output 100 [2022-02-11 00:34:22,356 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 88 treesize of output 72 [2022-02-11 00:34:22,617 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:34:22,617 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:34:23,353 INFO L353 Elim1Store]: treesize reduction 17, result has 41.4 percent of original size [2022-02-11 00:34:23,354 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 100 treesize of output 83 [2022-02-11 00:34:23,356 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:34:23,356 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:34:23,360 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:34:23,360 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 72 treesize of output 52 [2022-02-11 00:34:23,438 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:34:23,438 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2016083052] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:34:23,438 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:34:23,438 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 36 [2022-02-11 00:34:23,438 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1638173363] [2022-02-11 00:34:23,438 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:34:23,438 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-02-11 00:34:23,438 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:34:23,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-02-11 00:34:23,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=1145, Unknown=0, NotChecked=0, Total=1260 [2022-02-11 00:34:23,439 INFO L87 Difference]: Start difference. First operand 1004 states and 2984 transitions. Second operand has 36 states, 36 states have (on average 1.3611111111111112) internal successors, (49), 36 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) [2022-02-11 00:34:25,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:34:25,628 INFO L93 Difference]: Finished difference Result 1201 states and 3350 transitions. [2022-02-11 00:34:25,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-02-11 00:34:25,628 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.3611111111111112) internal successors, (49), 36 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 20 [2022-02-11 00:34:25,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:34:25,630 INFO L225 Difference]: With dead ends: 1201 [2022-02-11 00:34:25,630 INFO L226 Difference]: Without dead ends: 1171 [2022-02-11 00:34:25,630 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 534 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=352, Invalid=2954, Unknown=0, NotChecked=0, Total=3306 [2022-02-11 00:34:25,630 INFO L934 BasicCegarLoop]: 16 mSDtfsCounter, 228 mSDsluCounter, 695 mSDsCounter, 0 mSdLazyCounter, 1360 mSolverCounterSat, 123 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 228 SdHoareTripleChecker+Valid, 395 SdHoareTripleChecker+Invalid, 1483 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 123 IncrementalHoareTripleChecker+Valid, 1360 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-11 00:34:25,630 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [228 Valid, 395 Invalid, 1483 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [123 Valid, 1360 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-11 00:34:25,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1171 states. [2022-02-11 00:34:25,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1171 to 1007. [2022-02-11 00:34:25,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1007 states, 1006 states have (on average 2.9741550695825048) internal successors, (2992), 1006 states have internal predecessors, (2992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:34:25,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1007 states to 1007 states and 2992 transitions. [2022-02-11 00:34:25,641 INFO L78 Accepts]: Start accepts. Automaton has 1007 states and 2992 transitions. Word has length 20 [2022-02-11 00:34:25,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:34:25,641 INFO L470 AbstractCegarLoop]: Abstraction has 1007 states and 2992 transitions. [2022-02-11 00:34:25,641 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 1.3611111111111112) internal successors, (49), 36 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) [2022-02-11 00:34:25,641 INFO L276 IsEmpty]: Start isEmpty. Operand 1007 states and 2992 transitions. [2022-02-11 00:34:25,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-11 00:34:25,642 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:34:25,642 INFO L515 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:34:25,658 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (346)] Forceful destruction successful, exit code 0 [2022-02-11 00:34:25,842 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 346 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable353 [2022-02-11 00:34:25,842 INFO L402 AbstractCegarLoop]: === Iteration 355 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:34:25,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:34:25,843 INFO L85 PathProgramCache]: Analyzing trace with hash -1804011501, now seen corresponding path program 346 times [2022-02-11 00:34:25,843 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:34:25,843 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1799149002] [2022-02-11 00:34:25,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:34:25,843 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:34:25,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:34:26,208 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:34:26,208 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:34:26,208 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1799149002] [2022-02-11 00:34:26,208 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1799149002] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:34:26,208 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1386521159] [2022-02-11 00:34:26,208 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-11 00:34:26,208 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:34:26,208 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:34:26,209 INFO L229 MonitoredProcess]: Starting monitored process 347 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:34:26,210 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (347)] Waiting until timeout for monitored process [2022-02-11 00:34:26,286 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-11 00:34:26,286 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:34:26,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 49 conjunts are in the unsatisfiable core [2022-02-11 00:34:26,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:34:26,952 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 87 treesize of output 71 [2022-02-11 00:34:26,955 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 47 [2022-02-11 00:34:27,068 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:34:27,068 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:34:28,052 INFO L353 Elim1Store]: treesize reduction 17, result has 41.4 percent of original size [2022-02-11 00:34:28,052 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 117 treesize of output 94 [2022-02-11 00:34:28,054 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:34:28,054 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:34:28,058 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:34:28,058 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 83 treesize of output 57 [2022-02-11 00:34:28,093 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:34:28,094 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1386521159] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:34:28,094 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:34:28,094 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 36 [2022-02-11 00:34:28,094 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [788412093] [2022-02-11 00:34:28,094 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:34:28,094 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-02-11 00:34:28,094 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:34:28,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-02-11 00:34:28,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=1147, Unknown=0, NotChecked=0, Total=1260 [2022-02-11 00:34:28,094 INFO L87 Difference]: Start difference. First operand 1007 states and 2992 transitions. Second operand has 36 states, 36 states have (on average 1.3611111111111112) internal successors, (49), 36 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) [2022-02-11 00:34:30,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:34:30,643 INFO L93 Difference]: Finished difference Result 1130 states and 3209 transitions. [2022-02-11 00:34:30,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-02-11 00:34:30,644 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.3611111111111112) internal successors, (49), 36 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 20 [2022-02-11 00:34:30,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:34:30,645 INFO L225 Difference]: With dead ends: 1130 [2022-02-11 00:34:30,645 INFO L226 Difference]: Without dead ends: 1110 [2022-02-11 00:34:30,645 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 613 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=360, Invalid=3180, Unknown=0, NotChecked=0, Total=3540 [2022-02-11 00:34:30,645 INFO L934 BasicCegarLoop]: 16 mSDtfsCounter, 174 mSDsluCounter, 744 mSDsCounter, 0 mSdLazyCounter, 1338 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 174 SdHoareTripleChecker+Valid, 430 SdHoareTripleChecker+Invalid, 1432 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 1338 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-11 00:34:30,646 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [174 Valid, 430 Invalid, 1432 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 1338 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-11 00:34:30,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1110 states. [2022-02-11 00:34:30,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1110 to 1017. [2022-02-11 00:34:30,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1017 states, 1016 states have (on average 2.970472440944882) internal successors, (3018), 1016 states have internal predecessors, (3018), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:34:30,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1017 states to 1017 states and 3018 transitions. [2022-02-11 00:34:30,656 INFO L78 Accepts]: Start accepts. Automaton has 1017 states and 3018 transitions. Word has length 20 [2022-02-11 00:34:30,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:34:30,656 INFO L470 AbstractCegarLoop]: Abstraction has 1017 states and 3018 transitions. [2022-02-11 00:34:30,656 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 1.3611111111111112) internal successors, (49), 36 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) [2022-02-11 00:34:30,656 INFO L276 IsEmpty]: Start isEmpty. Operand 1017 states and 3018 transitions. [2022-02-11 00:34:30,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-11 00:34:30,657 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:34:30,657 INFO L515 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:34:30,677 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (347)] Ended with exit code 0 [2022-02-11 00:34:30,858 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 347 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable354 [2022-02-11 00:34:30,858 INFO L402 AbstractCegarLoop]: === Iteration 356 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:34:30,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:34:30,858 INFO L85 PathProgramCache]: Analyzing trace with hash -1770412273, now seen corresponding path program 347 times [2022-02-11 00:34:30,858 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:34:30,858 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [882015465] [2022-02-11 00:34:30,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:34:30,858 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:34:30,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:34:31,207 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:34:31,207 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:34:31,207 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [882015465] [2022-02-11 00:34:31,207 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [882015465] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:34:31,207 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [834533280] [2022-02-11 00:34:31,207 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-11 00:34:31,207 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:34:31,207 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:34:31,208 INFO L229 MonitoredProcess]: Starting monitored process 348 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:34:31,208 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (348)] Waiting until timeout for monitored process [2022-02-11 00:34:31,295 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-02-11 00:34:31,295 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:34:31,296 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 49 conjunts are in the unsatisfiable core [2022-02-11 00:34:31,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:34:31,865 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 59 [2022-02-11 00:34:31,868 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 47 [2022-02-11 00:34:31,994 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:34:31,995 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:34:32,421 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-02-11 00:34:32,421 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 145 treesize of output 118 [2022-02-11 00:34:32,425 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 113 treesize of output 81 [2022-02-11 00:34:32,637 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:34:32,638 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [834533280] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:34:32,638 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:34:32,638 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 36 [2022-02-11 00:34:32,638 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [799584425] [2022-02-11 00:34:32,638 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:34:32,638 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-02-11 00:34:32,638 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:34:32,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-02-11 00:34:32,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=1145, Unknown=0, NotChecked=0, Total=1260 [2022-02-11 00:34:32,638 INFO L87 Difference]: Start difference. First operand 1017 states and 3018 transitions. Second operand has 36 states, 36 states have (on average 1.3611111111111112) internal successors, (49), 36 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) [2022-02-11 00:34:35,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:34:35,604 INFO L93 Difference]: Finished difference Result 1369 states and 3720 transitions. [2022-02-11 00:34:35,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-02-11 00:34:35,604 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.3611111111111112) internal successors, (49), 36 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 20 [2022-02-11 00:34:35,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:34:35,612 INFO L225 Difference]: With dead ends: 1369 [2022-02-11 00:34:35,612 INFO L226 Difference]: Without dead ends: 1330 [2022-02-11 00:34:35,612 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1233 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=517, Invalid=5183, Unknown=0, NotChecked=0, Total=5700 [2022-02-11 00:34:35,612 INFO L934 BasicCegarLoop]: 16 mSDtfsCounter, 219 mSDsluCounter, 801 mSDsCounter, 0 mSdLazyCounter, 1632 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 219 SdHoareTripleChecker+Valid, 490 SdHoareTripleChecker+Invalid, 1730 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 1632 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-11 00:34:35,612 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [219 Valid, 490 Invalid, 1730 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 1632 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-11 00:34:35,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1330 states. [2022-02-11 00:34:35,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1330 to 1046. [2022-02-11 00:34:35,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1046 states, 1045 states have (on average 2.979904306220096) internal successors, (3114), 1045 states have internal predecessors, (3114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:34:35,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1046 states to 1046 states and 3114 transitions. [2022-02-11 00:34:35,628 INFO L78 Accepts]: Start accepts. Automaton has 1046 states and 3114 transitions. Word has length 20 [2022-02-11 00:34:35,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:34:35,628 INFO L470 AbstractCegarLoop]: Abstraction has 1046 states and 3114 transitions. [2022-02-11 00:34:35,628 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 1.3611111111111112) internal successors, (49), 36 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) [2022-02-11 00:34:35,628 INFO L276 IsEmpty]: Start isEmpty. Operand 1046 states and 3114 transitions. [2022-02-11 00:34:35,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-11 00:34:35,629 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:34:35,630 INFO L515 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:34:35,646 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (348)] Forceful destruction successful, exit code 0 [2022-02-11 00:34:35,830 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 348 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable355 [2022-02-11 00:34:35,830 INFO L402 AbstractCegarLoop]: === Iteration 357 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:34:35,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:34:35,830 INFO L85 PathProgramCache]: Analyzing trace with hash 308881555, now seen corresponding path program 348 times [2022-02-11 00:34:35,830 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:34:35,830 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1576871098] [2022-02-11 00:34:35,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:34:35,831 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:34:35,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:34:36,100 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:34:36,101 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:34:36,101 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1576871098] [2022-02-11 00:34:36,101 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1576871098] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:34:36,101 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1180697844] [2022-02-11 00:34:36,101 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-11 00:34:36,101 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:34:36,101 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:34:36,102 INFO L229 MonitoredProcess]: Starting monitored process 349 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:34:36,102 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (349)] Waiting until timeout for monitored process [2022-02-11 00:34:36,178 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-02-11 00:34:36,179 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:34:36,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 47 conjunts are in the unsatisfiable core [2022-02-11 00:34:36,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:34:36,660 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 99 treesize of output 83 [2022-02-11 00:34:36,662 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 83 treesize of output 67 [2022-02-11 00:34:36,892 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:34:36,892 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:34:37,278 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-02-11 00:34:37,279 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 139 treesize of output 112 [2022-02-11 00:34:37,282 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 107 treesize of output 75 [2022-02-11 00:34:37,480 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:34:37,480 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1180697844] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:34:37,480 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:34:37,480 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 36 [2022-02-11 00:34:37,480 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [130492131] [2022-02-11 00:34:37,480 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:34:37,480 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-02-11 00:34:37,480 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:34:37,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-02-11 00:34:37,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=1143, Unknown=0, NotChecked=0, Total=1260 [2022-02-11 00:34:37,481 INFO L87 Difference]: Start difference. First operand 1046 states and 3114 transitions. Second operand has 36 states, 36 states have (on average 1.3611111111111112) internal successors, (49), 36 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) Received shutdown request... [2022-02-11 00:34:40,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-02-11 00:34:40,364 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1147 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=603, Invalid=4947, Unknown=0, NotChecked=0, Total=5550 [2022-02-11 00:34:40,364 INFO L934 BasicCegarLoop]: 12 mSDtfsCounter, 179 mSDsluCounter, 663 mSDsCounter, 0 mSdLazyCounter, 1805 mSolverCounterSat, 159 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 179 SdHoareTripleChecker+Valid, 386 SdHoareTripleChecker+Invalid, 1964 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 159 IncrementalHoareTripleChecker+Valid, 1805 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-11 00:34:40,364 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [179 Valid, 386 Invalid, 1964 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [159 Valid, 1805 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-11 00:34:40,365 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONASSERT (2 of 3 remaining) [2022-02-11 00:34:40,381 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (349)] Ended with exit code 0 [2022-02-11 00:34:40,406 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 [2022-02-11 00:34:40,408 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (349)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2022-02-11 00:34:40,565 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 349 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable356 [2022-02-11 00:34:40,566 WARN L594 AbstractCegarLoop]: Verification canceled: while BasicCegarLoop was constructing difference of abstraction (1046states) and FLOYD_HOARE automaton (currently 47 states, 36 states before enhancement),while ReachableStatesComputation was computing reachable states (1096 states constructed, input type IntersectNwa). [2022-02-11 00:34:40,568 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATION (1 of 3 remaining) [2022-02-11 00:34:40,568 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATION (0 of 3 remaining) [2022-02-11 00:34:40,571 INFO L733 BasicCegarLoop]: Path program histogram: [348, 5, 4] [2022-02-11 00:34:40,572 INFO L234 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2022-02-11 00:34:40,572 INFO L184 ceAbstractionStarter]: Computing trace abstraction results [2022-02-11 00:34:40,574 INFO L202 PluginConnector]: Adding new model chromosome-opt-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 11.02 12:34:40 BasicIcfg [2022-02-11 00:34:40,574 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-02-11 00:34:40,574 INFO L158 Benchmark]: Toolchain (without parser) took 764216.76ms. Allocated memory was 167.8MB in the beginning and 250.6MB in the end (delta: 82.8MB). Free memory was 125.7MB in the beginning and 165.4MB in the end (delta: -39.7MB). Peak memory consumption was 43.2MB. Max. memory is 8.0GB. [2022-02-11 00:34:40,574 INFO L158 Benchmark]: Boogie PL CUP Parser took 0.11ms. Allocated memory is still 167.8MB. Free memory is still 127.0MB. There was no memory consumed. Max. memory is 8.0GB. [2022-02-11 00:34:40,574 INFO L158 Benchmark]: Boogie Procedure Inliner took 18.71ms. Allocated memory is still 167.8MB. Free memory was 125.7MB in the beginning and 124.1MB in the end (delta: 1.5MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-02-11 00:34:40,574 INFO L158 Benchmark]: Boogie Preprocessor took 19.83ms. Allocated memory is still 167.8MB. Free memory was 124.1MB in the beginning and 123.1MB in the end (delta: 977.3kB). There was no memory consumed. Max. memory is 8.0GB. [2022-02-11 00:34:40,574 INFO L158 Benchmark]: RCFGBuilder took 221.94ms. Allocated memory is still 167.8MB. Free memory was 123.1MB in the beginning and 111.8MB in the end (delta: 11.3MB). Peak memory consumption was 12.6MB. Max. memory is 8.0GB. [2022-02-11 00:34:40,574 INFO L158 Benchmark]: TraceAbstraction took 763939.30ms. Allocated memory was 167.8MB in the beginning and 250.6MB in the end (delta: 82.8MB). Free memory was 111.2MB in the beginning and 165.4MB in the end (delta: -54.2MB). Peak memory consumption was 29.6MB. Max. memory is 8.0GB. [2022-02-11 00:34:40,575 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.11ms. Allocated memory is still 167.8MB. Free memory is still 127.0MB. There was no memory consumed. Max. memory is 8.0GB. * Boogie Procedure Inliner took 18.71ms. Allocated memory is still 167.8MB. Free memory was 125.7MB in the beginning and 124.1MB in the end (delta: 1.5MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * Boogie Preprocessor took 19.83ms. Allocated memory is still 167.8MB. Free memory was 124.1MB in the beginning and 123.1MB in the end (delta: 977.3kB). There was no memory consumed. Max. memory is 8.0GB. * RCFGBuilder took 221.94ms. Allocated memory is still 167.8MB. Free memory was 123.1MB in the beginning and 111.8MB in the end (delta: 11.3MB). Peak memory consumption was 12.6MB. Max. memory is 8.0GB. * TraceAbstraction took 763939.30ms. Allocated memory was 167.8MB in the beginning and 250.6MB in the end (delta: 82.8MB). Free memory was 111.2MB in the beginning and 165.4MB in the end (delta: -54.2MB). Peak memory consumption was 29.6MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - TimeoutResultAtElement [Line: 80]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while BasicCegarLoop was constructing difference of abstraction (1046states) and FLOYD_HOARE automaton (currently 47 states, 36 states before enhancement),while ReachableStatesComputation was computing reachable states (1096 states constructed, input type IntersectNwa). - TimeoutResultAtElement [Line: 75]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was constructing difference of abstraction (1046states) and FLOYD_HOARE automaton (currently 47 states, 36 states before enhancement),while ReachableStatesComputation was computing reachable states (1096 states constructed, input type IntersectNwa). - TimeoutResultAtElement [Line: 72]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was constructing difference of abstraction (1046states) and FLOYD_HOARE automaton (currently 47 states, 36 states before enhancement),while ReachableStatesComputation was computing reachable states (1096 states constructed, input type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 27 locations, 3 error locations. Started 1 CEGAR loops. OverallTime: 763.8s, OverallIterations: 357, TraceHistogramMax: 5, PathProgramHistogramMax: 348, EmptinessCheckTime: 0.3s, AutomataDifference: 347.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 45990 SdHoareTripleChecker+Valid, 109.4s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 45990 mSDsluCounter, 79533 SdHoareTripleChecker+Invalid, 92.5s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 4 IncrementalHoareTripleChecker+Unchecked, 138036 mSDsCounter, 18118 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 253911 IncrementalHoareTripleChecker+Invalid, 272033 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 18118 mSolverCounterUnsat, 4938 mSDtfsCounter, 253911 mSolverCounterSat, 0.7s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 20533 GetRequests, 7460 SyntacticMatches, 167 SemanticMatches, 12906 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118005 ImplicationChecksByTransitivity, 357.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=1155occurred in iteration=336, InterpolantAutomatonStates: 8853, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 2.5s AutomataMinimizationTime, 356 MinimizatonAttempts, 40475 StatesRemovedByMinimization, 353 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 1.3s SsaConstructionTime, 5.4s SatisfiabilityAnalysisTime, 320.0s InterpolantComputationTime, 12549 NumberOfCodeBlocks, 12549 NumberOfCodeBlocksAsserted, 1195 NumberOfCheckSat, 17714 ConstructedInterpolants, 1 QuantifiedInterpolants, 240448 SizeOfPredicates, 4238 NumberOfNonLiveVariables, 31602 ConjunctsInSsa, 11016 ConjunctsInUnsatCore, 1053 InterpolantComputations, 9 PerfectInterpolantSequences, 977/12776 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