/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/queue-add-3-nl.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.2-wip.dk.mcr-reduction-44898dd [2022-02-15 14:38:49,385 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-02-15 14:38:49,387 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-02-15 14:38:49,440 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-02-15 14:38:49,461 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 [2022-02-15 14:38:49,473 INFO L113 SettingsManager]: Loading preferences was successful [2022-02-15 14:38:49,473 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-02-15 14:38:49,474 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-02-15 14:38:49,474 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-02-15 14:38:49,474 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-02-15 14:38:49,474 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-02-15 14:38:49,475 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-02-15 14:38:49,475 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-02-15 14:38:49,475 INFO L138 SettingsManager]: * Use SBE=true [2022-02-15 14:38:49,475 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-02-15 14:38:49,475 INFO L138 SettingsManager]: * sizeof long=4 [2022-02-15 14:38:49,475 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-02-15 14:38:49,475 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-02-15 14:38:49,475 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-02-15 14:38:49,475 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-02-15 14:38:49,476 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-02-15 14:38:49,476 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-02-15 14:38:49,476 INFO L138 SettingsManager]: * sizeof long double=12 [2022-02-15 14:38:49,476 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-02-15 14:38:49,476 INFO L138 SettingsManager]: * Use constant arrays=true [2022-02-15 14:38:49,476 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-02-15 14:38:49,476 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-02-15 14:38:49,476 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-02-15 14:38:49,476 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-02-15 14:38:49,476 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-02-15 14:38:49,476 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-15 14:38:49,477 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-02-15 14:38:49,477 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-02-15 14:38:49,477 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-02-15 14:38:49,477 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-02-15 14:38:49,477 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-02-15 14:38:49,477 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-02-15 14:38:49,477 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-02-15 14:38:49,477 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-02-15 14:38:49,664 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-02-15 14:38:49,683 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-02-15 14:38:49,684 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-02-15 14:38:49,685 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2022-02-15 14:38:49,687 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2022-02-15 14:38:49,688 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/queue-add-3-nl.wvr.bpl [2022-02-15 14:38:49,688 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/queue-add-3-nl.wvr.bpl' [2022-02-15 14:38:49,716 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-02-15 14:38:49,717 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-02-15 14:38:49,721 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-02-15 14:38:49,721 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-02-15 14:38:49,721 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-02-15 14:38:49,730 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "queue-add-3-nl.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.02 02:38:49" (1/1) ... [2022-02-15 14:38:49,735 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "queue-add-3-nl.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.02 02:38:49" (1/1) ... [2022-02-15 14:38:49,740 INFO L137 Inliner]: procedures = 4, calls = 3, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2022-02-15 14:38:49,741 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-02-15 14:38:49,742 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-02-15 14:38:49,742 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-02-15 14:38:49,742 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-02-15 14:38:49,747 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "queue-add-3-nl.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.02 02:38:49" (1/1) ... [2022-02-15 14:38:49,748 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "queue-add-3-nl.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.02 02:38:49" (1/1) ... [2022-02-15 14:38:49,748 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "queue-add-3-nl.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.02 02:38:49" (1/1) ... [2022-02-15 14:38:49,749 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "queue-add-3-nl.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.02 02:38:49" (1/1) ... [2022-02-15 14:38:49,751 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "queue-add-3-nl.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.02 02:38:49" (1/1) ... [2022-02-15 14:38:49,753 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "queue-add-3-nl.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.02 02:38:49" (1/1) ... [2022-02-15 14:38:49,753 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "queue-add-3-nl.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.02 02:38:49" (1/1) ... [2022-02-15 14:38:49,754 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-02-15 14:38:49,755 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-02-15 14:38:49,755 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-02-15 14:38:49,755 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-02-15 14:38:49,756 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "queue-add-3-nl.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.02 02:38:49" (1/1) ... [2022-02-15 14:38:49,761 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-15 14:38:49,766 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:38:49,777 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) [2022-02-15 14:38:49,783 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 [2022-02-15 14:38:49,805 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2022-02-15 14:38:49,806 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-02-15 14:38:49,806 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-02-15 14:38:49,806 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2022-02-15 14:38:49,806 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-02-15 14:38:49,806 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-02-15 14:38:49,806 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2022-02-15 14:38:49,806 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-02-15 14:38:49,806 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-02-15 14:38:49,806 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2022-02-15 14:38:49,806 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-02-15 14:38:49,807 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-02-15 14:38:49,807 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-02-15 14:38:49,853 INFO L234 CfgBuilder]: Building ICFG [2022-02-15 14:38:49,854 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-02-15 14:38:49,973 INFO L275 CfgBuilder]: Performing block encoding [2022-02-15 14:38:49,986 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-02-15 14:38:49,986 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-02-15 14:38:49,987 INFO L202 PluginConnector]: Adding new model queue-add-3-nl.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 02:38:49 BoogieIcfgContainer [2022-02-15 14:38:49,987 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-02-15 14:38:49,988 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-02-15 14:38:49,989 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-02-15 14:38:49,991 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-02-15 14:38:49,991 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "queue-add-3-nl.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.02 02:38:49" (1/2) ... [2022-02-15 14:38:49,991 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ce484b3 and model type queue-add-3-nl.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.02 02:38:49, skipping insertion in model container [2022-02-15 14:38:49,992 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "queue-add-3-nl.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 02:38:49" (2/2) ... [2022-02-15 14:38:49,992 INFO L111 eAbstractionObserver]: Analyzing ICFG queue-add-3-nl.wvr.bpl [2022-02-15 14:38:49,996 WARN L150 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-02-15 14:38:49,996 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-02-15 14:38:49,996 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-02-15 14:38:49,996 INFO L534 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-02-15 14:38:50,045 INFO L148 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-02-15 14:38:50,085 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-02-15 14:38:50,091 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mLazyFiniteAutomaton=false, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2022-02-15 14:38:50,091 INFO L340 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2022-02-15 14:38:50,101 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 49 places, 42 transitions, 108 flow [2022-02-15 14:38:50,185 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 1013 states, 1012 states have (on average 2.975296442687747) internal successors, (3011), 1012 states have internal predecessors, (3011), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:38:50,189 INFO L276 IsEmpty]: Start isEmpty. Operand has 1013 states, 1012 states have (on average 2.975296442687747) internal successors, (3011), 1012 states have internal predecessors, (3011), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:38:50,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-02-15 14:38:50,211 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:38:50,212 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:38:50,213 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 14:38:50,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:38:50,217 INFO L85 PathProgramCache]: Analyzing trace with hash 1996667167, now seen corresponding path program 1 times [2022-02-15 14:38:50,222 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:38:50,223 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [54013693] [2022-02-15 14:38:50,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:38:50,224 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:38:50,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:38:50,313 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:38:50,313 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:38:50,314 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [54013693] [2022-02-15 14:38:50,314 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [54013693] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 14:38:50,314 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 14:38:50,314 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-02-15 14:38:50,315 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1077512835] [2022-02-15 14:38:50,316 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 14:38:50,320 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-02-15 14:38:50,321 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:38:50,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-02-15 14:38:50,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-02-15 14:38:50,346 INFO L87 Difference]: Start difference. First operand has 1013 states, 1012 states have (on average 2.975296442687747) internal successors, (3011), 1012 states have internal predecessors, (3011), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:38:50,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:38:50,409 INFO L93 Difference]: Finished difference Result 1112 states and 3308 transitions. [2022-02-15 14:38:50,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-02-15 14:38:50,410 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-02-15 14:38:50,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:38:50,429 INFO L225 Difference]: With dead ends: 1112 [2022-02-15 14:38:50,429 INFO L226 Difference]: Without dead ends: 1112 [2022-02-15 14:38:50,430 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-02-15 14:38:50,432 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 25 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-15 14:38:50,433 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 60 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-15 14:38:50,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1112 states. [2022-02-15 14:38:50,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1112 to 1112. [2022-02-15 14:38:50,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1112 states, 1111 states have (on average 2.9774977497749773) internal successors, (3308), 1111 states have internal predecessors, (3308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:38:50,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1112 states to 1112 states and 3308 transitions. [2022-02-15 14:38:50,570 INFO L78 Accepts]: Start accepts. Automaton has 1112 states and 3308 transitions. Word has length 22 [2022-02-15 14:38:50,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:38:50,571 INFO L470 AbstractCegarLoop]: Abstraction has 1112 states and 3308 transitions. [2022-02-15 14:38:50,571 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:38:50,571 INFO L276 IsEmpty]: Start isEmpty. Operand 1112 states and 3308 transitions. [2022-02-15 14:38:50,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-02-15 14:38:50,574 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:38:50,574 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:38:50,574 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-02-15 14:38:50,574 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 14:38:50,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:38:50,575 INFO L85 PathProgramCache]: Analyzing trace with hash 1213084767, now seen corresponding path program 1 times [2022-02-15 14:38:50,575 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:38:50,575 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1400740783] [2022-02-15 14:38:50,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:38:50,576 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:38:50,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:38:50,605 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:38:50,605 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:38:50,605 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1400740783] [2022-02-15 14:38:50,605 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1400740783] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 14:38:50,605 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 14:38:50,605 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-02-15 14:38:50,606 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1197865847] [2022-02-15 14:38:50,606 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 14:38:50,607 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-02-15 14:38:50,607 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:38:50,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-02-15 14:38:50,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-02-15 14:38:50,607 INFO L87 Difference]: Start difference. First operand 1112 states and 3308 transitions. Second operand has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 2 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) [2022-02-15 14:38:50,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:38:50,633 INFO L93 Difference]: Finished difference Result 1165 states and 3465 transitions. [2022-02-15 14:38:50,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-02-15 14:38:50,633 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 2 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 28 [2022-02-15 14:38:50,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:38:50,638 INFO L225 Difference]: With dead ends: 1165 [2022-02-15 14:38:50,638 INFO L226 Difference]: Without dead ends: 1165 [2022-02-15 14:38:50,638 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-02-15 14:38:50,639 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 13 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-15 14:38:50,640 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 50 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-15 14:38:50,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1165 states. [2022-02-15 14:38:50,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1165 to 1165. [2022-02-15 14:38:50,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1165 states, 1164 states have (on average 2.9768041237113403) internal successors, (3465), 1164 states have internal predecessors, (3465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:38:50,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1165 states to 1165 states and 3465 transitions. [2022-02-15 14:38:50,669 INFO L78 Accepts]: Start accepts. Automaton has 1165 states and 3465 transitions. Word has length 28 [2022-02-15 14:38:50,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:38:50,669 INFO L470 AbstractCegarLoop]: Abstraction has 1165 states and 3465 transitions. [2022-02-15 14:38:50,669 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 2 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) [2022-02-15 14:38:50,669 INFO L276 IsEmpty]: Start isEmpty. Operand 1165 states and 3465 transitions. [2022-02-15 14:38:50,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-02-15 14:38:50,672 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:38:50,672 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:38:50,673 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-02-15 14:38:50,673 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 14:38:50,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:38:50,674 INFO L85 PathProgramCache]: Analyzing trace with hash -989860967, now seen corresponding path program 2 times [2022-02-15 14:38:50,674 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:38:50,674 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1189658482] [2022-02-15 14:38:50,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:38:50,675 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:38:50,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:38:50,708 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 14:38:50,708 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:38:50,709 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1189658482] [2022-02-15 14:38:50,709 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1189658482] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 14:38:50,709 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 14:38:50,709 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-02-15 14:38:50,711 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203335868] [2022-02-15 14:38:50,711 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 14:38:50,714 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-02-15 14:38:50,717 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:38:50,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-02-15 14:38:50,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-02-15 14:38:50,718 INFO L87 Difference]: Start difference. First operand 1165 states and 3465 transitions. Second operand has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 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) [2022-02-15 14:38:50,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:38:50,757 INFO L93 Difference]: Finished difference Result 1281 states and 3812 transitions. [2022-02-15 14:38:50,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-02-15 14:38:50,757 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 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 28 [2022-02-15 14:38:50,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:38:50,762 INFO L225 Difference]: With dead ends: 1281 [2022-02-15 14:38:50,762 INFO L226 Difference]: Without dead ends: 1281 [2022-02-15 14:38:50,763 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-02-15 14:38:50,771 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 25 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-15 14:38:50,772 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 60 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-15 14:38:50,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1281 states. [2022-02-15 14:38:50,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1281 to 1281. [2022-02-15 14:38:50,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1281 states, 1280 states have (on average 2.978125) internal successors, (3812), 1280 states have internal predecessors, (3812), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:38:50,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1281 states to 1281 states and 3812 transitions. [2022-02-15 14:38:50,799 INFO L78 Accepts]: Start accepts. Automaton has 1281 states and 3812 transitions. Word has length 28 [2022-02-15 14:38:50,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:38:50,800 INFO L470 AbstractCegarLoop]: Abstraction has 1281 states and 3812 transitions. [2022-02-15 14:38:50,800 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 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) [2022-02-15 14:38:50,801 INFO L276 IsEmpty]: Start isEmpty. Operand 1281 states and 3812 transitions. [2022-02-15 14:38:50,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-02-15 14:38:50,803 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:38:50,803 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:38:50,803 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-02-15 14:38:50,804 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 14:38:50,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:38:50,804 INFO L85 PathProgramCache]: Analyzing trace with hash 416907713, now seen corresponding path program 1 times [2022-02-15 14:38:50,804 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:38:50,805 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1300654392] [2022-02-15 14:38:50,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:38:50,805 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:38:50,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:38:51,303 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:38:51,303 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:38:51,303 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1300654392] [2022-02-15 14:38:51,303 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1300654392] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:38:51,303 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [855338720] [2022-02-15 14:38:51,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:38:51,304 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:38:51,304 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:38:51,319 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) [2022-02-15 14:38:51,355 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-02-15 14:38:51,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:38:51,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-15 14:38:51,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:38:51,917 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:38:51,917 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:38:52,375 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:38:52,375 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [855338720] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:38:52,375 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:38:52,375 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 25 [2022-02-15 14:38:52,375 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1022225694] [2022-02-15 14:38:52,375 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:38:52,376 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-15 14:38:52,376 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:38:52,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-15 14:38:52,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=538, Unknown=0, NotChecked=0, Total=650 [2022-02-15 14:38:52,377 INFO L87 Difference]: Start difference. First operand 1281 states and 3812 transitions. Second operand has 26 states, 26 states have (on average 3.423076923076923) internal successors, (89), 25 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:38:53,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:38:53,363 INFO L93 Difference]: Finished difference Result 2613 states and 7587 transitions. [2022-02-15 14:38:53,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-02-15 14:38:53,364 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 3.423076923076923) internal successors, (89), 25 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-02-15 14:38:53,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:38:53,373 INFO L225 Difference]: With dead ends: 2613 [2022-02-15 14:38:53,373 INFO L226 Difference]: Without dead ends: 2598 [2022-02-15 14:38:53,374 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 46 SyntacticMatches, 5 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 507 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=269, Invalid=1371, Unknown=0, NotChecked=0, Total=1640 [2022-02-15 14:38:53,375 INFO L933 BasicCegarLoop]: 112 mSDtfsCounter, 384 mSDsluCounter, 1646 mSDsCounter, 0 mSdLazyCounter, 1212 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 384 SdHoareTripleChecker+Valid, 1142 SdHoareTripleChecker+Invalid, 1241 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 1212 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-15 14:38:53,375 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [384 Valid, 1142 Invalid, 1241 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 1212 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-15 14:38:53,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2598 states. [2022-02-15 14:38:53,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2598 to 1446. [2022-02-15 14:38:53,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1446 states, 1445 states have (on average 2.9577854671280277) internal successors, (4274), 1445 states have internal predecessors, (4274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:38:53,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1446 states to 1446 states and 4274 transitions. [2022-02-15 14:38:53,428 INFO L78 Accepts]: Start accepts. Automaton has 1446 states and 4274 transitions. Word has length 33 [2022-02-15 14:38:53,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:38:53,428 INFO L470 AbstractCegarLoop]: Abstraction has 1446 states and 4274 transitions. [2022-02-15 14:38:53,428 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 3.423076923076923) internal successors, (89), 25 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:38:53,428 INFO L276 IsEmpty]: Start isEmpty. Operand 1446 states and 4274 transitions. [2022-02-15 14:38:53,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-02-15 14:38:53,433 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:38:53,433 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:38:53,451 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-02-15 14:38:53,649 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:38:53,649 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 14:38:53,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:38:53,650 INFO L85 PathProgramCache]: Analyzing trace with hash -351824383, now seen corresponding path program 2 times [2022-02-15 14:38:53,650 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:38:53,650 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [51741277] [2022-02-15 14:38:53,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:38:53,650 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:38:53,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:38:53,909 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:38:53,909 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:38:53,910 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [51741277] [2022-02-15 14:38:53,910 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [51741277] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:38:53,910 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [827250335] [2022-02-15 14:38:53,910 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-15 14:38:53,910 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:38:53,910 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:38:53,911 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) [2022-02-15 14:38:53,912 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-02-15 14:38:53,940 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-15 14:38:53,940 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:38:53,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 25 conjunts are in the unsatisfiable core [2022-02-15 14:38:53,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:38:54,170 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-02-15 14:38:54,383 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:38:54,384 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:38:54,908 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:38:54,909 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [827250335] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:38:54,909 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:38:54,909 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 22 [2022-02-15 14:38:54,909 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1026911395] [2022-02-15 14:38:54,909 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:38:54,909 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-02-15 14:38:54,909 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:38:54,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-02-15 14:38:54,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2022-02-15 14:38:54,910 INFO L87 Difference]: Start difference. First operand 1446 states and 4274 transitions. Second operand has 23 states, 23 states have (on average 3.0434782608695654) internal successors, (70), 22 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:38:56,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:38:56,065 INFO L93 Difference]: Finished difference Result 2643 states and 7655 transitions. [2022-02-15 14:38:56,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-02-15 14:38:56,066 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.0434782608695654) internal successors, (70), 22 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-02-15 14:38:56,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:38:56,076 INFO L225 Difference]: With dead ends: 2643 [2022-02-15 14:38:56,076 INFO L226 Difference]: Without dead ends: 2624 [2022-02-15 14:38:56,077 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 45 SyntacticMatches, 9 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 419 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=218, Invalid=1188, Unknown=0, NotChecked=0, Total=1406 [2022-02-15 14:38:56,077 INFO L933 BasicCegarLoop]: 115 mSDtfsCounter, 317 mSDsluCounter, 1907 mSDsCounter, 0 mSdLazyCounter, 1420 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 317 SdHoareTripleChecker+Valid, 1369 SdHoareTripleChecker+Invalid, 1463 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 1420 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-15 14:38:56,077 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [317 Valid, 1369 Invalid, 1463 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 1420 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-15 14:38:56,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2624 states. [2022-02-15 14:38:56,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2624 to 1460. [2022-02-15 14:38:56,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1460 states, 1459 states have (on average 2.9588759424263196) internal successors, (4317), 1459 states have internal predecessors, (4317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:38:56,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1460 states to 1460 states and 4317 transitions. [2022-02-15 14:38:56,115 INFO L78 Accepts]: Start accepts. Automaton has 1460 states and 4317 transitions. Word has length 33 [2022-02-15 14:38:56,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:38:56,115 INFO L470 AbstractCegarLoop]: Abstraction has 1460 states and 4317 transitions. [2022-02-15 14:38:56,115 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.0434782608695654) internal successors, (70), 22 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:38:56,115 INFO L276 IsEmpty]: Start isEmpty. Operand 1460 states and 4317 transitions. [2022-02-15 14:38:56,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-02-15 14:38:56,117 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:38:56,118 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:38:56,137 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-02-15 14:38:56,333 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:38:56,334 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 14:38:56,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:38:56,334 INFO L85 PathProgramCache]: Analyzing trace with hash 524358081, now seen corresponding path program 3 times [2022-02-15 14:38:56,335 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:38:56,335 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1178585787] [2022-02-15 14:38:56,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:38:56,335 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:38:56,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:38:56,597 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:38:56,598 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:38:56,598 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1178585787] [2022-02-15 14:38:56,598 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1178585787] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:38:56,598 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1275748186] [2022-02-15 14:38:56,598 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-15 14:38:56,598 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:38:56,598 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:38:56,599 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) [2022-02-15 14:38:56,600 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-02-15 14:38:56,626 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-02-15 14:38:56,626 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:38:56,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 25 conjunts are in the unsatisfiable core [2022-02-15 14:38:56,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:38:56,853 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 5 treesize of output 3 [2022-02-15 14:38:57,094 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:38:57,095 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:38:57,615 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:38:57,615 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1275748186] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:38:57,615 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:38:57,615 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 22 [2022-02-15 14:38:57,615 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [643991706] [2022-02-15 14:38:57,615 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:38:57,616 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-02-15 14:38:57,616 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:38:57,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-02-15 14:38:57,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2022-02-15 14:38:57,616 INFO L87 Difference]: Start difference. First operand 1460 states and 4317 transitions. Second operand has 23 states, 23 states have (on average 3.0434782608695654) internal successors, (70), 22 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:38:58,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:38:58,907 INFO L93 Difference]: Finished difference Result 2351 states and 6762 transitions. [2022-02-15 14:38:58,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-02-15 14:38:58,907 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.0434782608695654) internal successors, (70), 22 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-02-15 14:38:58,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:38:58,915 INFO L225 Difference]: With dead ends: 2351 [2022-02-15 14:38:58,916 INFO L226 Difference]: Without dead ends: 2336 [2022-02-15 14:38:58,916 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 45 SyntacticMatches, 9 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 443 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=255, Invalid=1305, Unknown=0, NotChecked=0, Total=1560 [2022-02-15 14:38:58,918 INFO L933 BasicCegarLoop]: 118 mSDtfsCounter, 346 mSDsluCounter, 1840 mSDsCounter, 0 mSdLazyCounter, 1420 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 346 SdHoareTripleChecker+Valid, 1306 SdHoareTripleChecker+Invalid, 1466 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 1420 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-15 14:38:58,918 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [346 Valid, 1306 Invalid, 1466 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 1420 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-15 14:38:58,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2336 states. [2022-02-15 14:38:58,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2336 to 1458. [2022-02-15 14:38:58,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1458 states, 1457 states have (on average 2.959505833905285) internal successors, (4312), 1457 states have internal predecessors, (4312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:38:58,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1458 states to 1458 states and 4312 transitions. [2022-02-15 14:38:58,948 INFO L78 Accepts]: Start accepts. Automaton has 1458 states and 4312 transitions. Word has length 33 [2022-02-15 14:38:58,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:38:58,948 INFO L470 AbstractCegarLoop]: Abstraction has 1458 states and 4312 transitions. [2022-02-15 14:38:58,948 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.0434782608695654) internal successors, (70), 22 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:38:58,949 INFO L276 IsEmpty]: Start isEmpty. Operand 1458 states and 4312 transitions. [2022-02-15 14:38:58,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-02-15 14:38:58,951 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:38:58,952 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:38:58,969 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-02-15 14:38:59,167 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:38:59,168 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 14:38:59,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:38:59,168 INFO L85 PathProgramCache]: Analyzing trace with hash -210109243, now seen corresponding path program 4 times [2022-02-15 14:38:59,168 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:38:59,168 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1766410359] [2022-02-15 14:38:59,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:38:59,168 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:38:59,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:38:59,417 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:38:59,417 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:38:59,417 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1766410359] [2022-02-15 14:38:59,418 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1766410359] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:38:59,418 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [567079243] [2022-02-15 14:38:59,418 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-15 14:38:59,418 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:38:59,418 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:38:59,419 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) [2022-02-15 14:38:59,420 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-02-15 14:38:59,447 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-15 14:38:59,447 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:38:59,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-15 14:38:59,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:38:59,832 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:38:59,832 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:39:00,260 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:39:00,260 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [567079243] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:39:00,260 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:39:00,260 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 25 [2022-02-15 14:39:00,261 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1699726752] [2022-02-15 14:39:00,261 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:39:00,261 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-15 14:39:00,261 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:39:00,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-15 14:39:00,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=537, Unknown=0, NotChecked=0, Total=650 [2022-02-15 14:39:00,262 INFO L87 Difference]: Start difference. First operand 1458 states and 4312 transitions. Second operand has 26 states, 26 states have (on average 3.269230769230769) internal successors, (85), 25 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) [2022-02-15 14:39:01,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:39:01,374 INFO L93 Difference]: Finished difference Result 2937 states and 8459 transitions. [2022-02-15 14:39:01,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-02-15 14:39:01,375 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 3.269230769230769) internal successors, (85), 25 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) Word has length 33 [2022-02-15 14:39:01,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:39:01,385 INFO L225 Difference]: With dead ends: 2937 [2022-02-15 14:39:01,385 INFO L226 Difference]: Without dead ends: 2922 [2022-02-15 14:39:01,386 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 46 SyntacticMatches, 5 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 668 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=335, Invalid=1735, Unknown=0, NotChecked=0, Total=2070 [2022-02-15 14:39:01,386 INFO L933 BasicCegarLoop]: 137 mSDtfsCounter, 456 mSDsluCounter, 1987 mSDsCounter, 0 mSdLazyCounter, 1448 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 456 SdHoareTripleChecker+Valid, 1398 SdHoareTripleChecker+Invalid, 1493 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 1448 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-15 14:39:01,386 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [456 Valid, 1398 Invalid, 1493 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 1448 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-15 14:39:01,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2922 states. [2022-02-15 14:39:01,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2922 to 1477. [2022-02-15 14:39:01,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1477 states, 1476 states have (on average 2.959349593495935) internal successors, (4368), 1476 states have internal predecessors, (4368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:39:01,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1477 states to 1477 states and 4368 transitions. [2022-02-15 14:39:01,421 INFO L78 Accepts]: Start accepts. Automaton has 1477 states and 4368 transitions. Word has length 33 [2022-02-15 14:39:01,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:39:01,421 INFO L470 AbstractCegarLoop]: Abstraction has 1477 states and 4368 transitions. [2022-02-15 14:39:01,422 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 3.269230769230769) internal successors, (85), 25 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) [2022-02-15 14:39:01,422 INFO L276 IsEmpty]: Start isEmpty. Operand 1477 states and 4368 transitions. [2022-02-15 14:39:01,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-02-15 14:39:01,424 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:39:01,424 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:39:01,443 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-02-15 14:39:01,640 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:39:01,640 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 14:39:01,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:39:01,641 INFO L85 PathProgramCache]: Analyzing trace with hash -1493256703, now seen corresponding path program 5 times [2022-02-15 14:39:01,641 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:39:01,641 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1989557914] [2022-02-15 14:39:01,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:39:01,641 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:39:01,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:39:01,852 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:39:01,853 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:39:01,853 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1989557914] [2022-02-15 14:39:01,853 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1989557914] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:39:01,853 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [207235619] [2022-02-15 14:39:01,853 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-15 14:39:01,853 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:39:01,853 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:39:01,854 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) [2022-02-15 14:39:01,854 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-02-15 14:39:01,881 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-15 14:39:01,881 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:39:01,882 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-15 14:39:01,883 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:39:02,240 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:39:02,240 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:39:02,627 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:39:02,628 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [207235619] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:39:02,628 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:39:02,628 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 25 [2022-02-15 14:39:02,628 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1256261333] [2022-02-15 14:39:02,628 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:39:02,628 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-15 14:39:02,628 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:39:02,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-15 14:39:02,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=537, Unknown=0, NotChecked=0, Total=650 [2022-02-15 14:39:02,629 INFO L87 Difference]: Start difference. First operand 1477 states and 4368 transitions. Second operand has 26 states, 26 states have (on average 3.269230769230769) internal successors, (85), 25 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) [2022-02-15 14:39:03,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:39:03,728 INFO L93 Difference]: Finished difference Result 3196 states and 9103 transitions. [2022-02-15 14:39:03,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-02-15 14:39:03,728 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 3.269230769230769) internal successors, (85), 25 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) Word has length 33 [2022-02-15 14:39:03,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:39:03,739 INFO L225 Difference]: With dead ends: 3196 [2022-02-15 14:39:03,739 INFO L226 Difference]: Without dead ends: 3181 [2022-02-15 14:39:03,740 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 46 SyntacticMatches, 5 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 645 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=312, Invalid=1668, Unknown=0, NotChecked=0, Total=1980 [2022-02-15 14:39:03,740 INFO L933 BasicCegarLoop]: 139 mSDtfsCounter, 471 mSDsluCounter, 1889 mSDsCounter, 0 mSdLazyCounter, 1394 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 471 SdHoareTripleChecker+Valid, 1318 SdHoareTripleChecker+Invalid, 1442 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 1394 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-15 14:39:03,740 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [471 Valid, 1318 Invalid, 1442 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 1394 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-15 14:39:03,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3181 states. [2022-02-15 14:39:03,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3181 to 1477. [2022-02-15 14:39:03,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1477 states, 1476 states have (on average 2.959349593495935) internal successors, (4368), 1476 states have internal predecessors, (4368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:39:03,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1477 states to 1477 states and 4368 transitions. [2022-02-15 14:39:03,774 INFO L78 Accepts]: Start accepts. Automaton has 1477 states and 4368 transitions. Word has length 33 [2022-02-15 14:39:03,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:39:03,775 INFO L470 AbstractCegarLoop]: Abstraction has 1477 states and 4368 transitions. [2022-02-15 14:39:03,775 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 3.269230769230769) internal successors, (85), 25 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) [2022-02-15 14:39:03,775 INFO L276 IsEmpty]: Start isEmpty. Operand 1477 states and 4368 transitions. [2022-02-15 14:39:03,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-02-15 14:39:03,778 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:39:03,778 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:39:03,807 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-02-15 14:39:03,994 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:39:03,995 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 14:39:03,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:39:03,995 INFO L85 PathProgramCache]: Analyzing trace with hash -1209675547, now seen corresponding path program 6 times [2022-02-15 14:39:03,995 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:39:03,995 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [709964640] [2022-02-15 14:39:03,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:39:03,996 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:39:04,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:39:04,204 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:39:04,204 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:39:04,204 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [709964640] [2022-02-15 14:39:04,204 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [709964640] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:39:04,204 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [503603983] [2022-02-15 14:39:04,204 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-15 14:39:04,204 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:39:04,205 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:39:04,205 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) [2022-02-15 14:39:04,206 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-02-15 14:39:04,231 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-02-15 14:39:04,231 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:39:04,231 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 22 conjunts are in the unsatisfiable core [2022-02-15 14:39:04,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:39:04,629 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:39:04,629 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:39:05,056 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:39:05,057 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [503603983] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:39:05,057 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:39:05,057 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 23 [2022-02-15 14:39:05,057 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [166185162] [2022-02-15 14:39:05,057 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:39:05,057 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-02-15 14:39:05,057 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:39:05,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-02-15 14:39:05,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=454, Unknown=0, NotChecked=0, Total=552 [2022-02-15 14:39:05,058 INFO L87 Difference]: Start difference. First operand 1477 states and 4368 transitions. Second operand has 24 states, 24 states have (on average 3.0) internal successors, (72), 23 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:39:05,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:39:05,826 INFO L93 Difference]: Finished difference Result 2828 states and 8191 transitions. [2022-02-15 14:39:05,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-02-15 14:39:05,827 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 3.0) internal successors, (72), 23 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-02-15 14:39:05,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:39:05,845 INFO L225 Difference]: With dead ends: 2828 [2022-02-15 14:39:05,845 INFO L226 Difference]: Without dead ends: 2813 [2022-02-15 14:39:05,846 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 47 SyntacticMatches, 6 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 424 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=239, Invalid=1167, Unknown=0, NotChecked=0, Total=1406 [2022-02-15 14:39:05,846 INFO L933 BasicCegarLoop]: 110 mSDtfsCounter, 405 mSDsluCounter, 1215 mSDsCounter, 0 mSdLazyCounter, 935 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 405 SdHoareTripleChecker+Valid, 852 SdHoareTripleChecker+Invalid, 967 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 935 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-15 14:39:05,846 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [405 Valid, 852 Invalid, 967 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 935 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-15 14:39:05,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2813 states. [2022-02-15 14:39:05,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2813 to 1561. [2022-02-15 14:39:05,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1561 states, 1560 states have (on average 2.943589743589744) internal successors, (4592), 1560 states have internal predecessors, (4592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:39:05,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1561 states to 1561 states and 4592 transitions. [2022-02-15 14:39:05,877 INFO L78 Accepts]: Start accepts. Automaton has 1561 states and 4592 transitions. Word has length 33 [2022-02-15 14:39:05,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:39:05,877 INFO L470 AbstractCegarLoop]: Abstraction has 1561 states and 4592 transitions. [2022-02-15 14:39:05,877 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 3.0) internal successors, (72), 23 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:39:05,877 INFO L276 IsEmpty]: Start isEmpty. Operand 1561 states and 4592 transitions. [2022-02-15 14:39:05,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-02-15 14:39:05,880 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:39:05,880 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:39:05,897 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-02-15 14:39:06,094 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:39:06,094 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 14:39:06,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:39:06,094 INFO L85 PathProgramCache]: Analyzing trace with hash -1245308595, now seen corresponding path program 7 times [2022-02-15 14:39:06,095 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:39:06,095 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [925396463] [2022-02-15 14:39:06,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:39:06,095 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:39:06,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:39:06,317 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:39:06,317 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:39:06,317 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [925396463] [2022-02-15 14:39:06,317 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [925396463] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:39:06,317 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [12031280] [2022-02-15 14:39:06,317 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-15 14:39:06,318 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:39:06,318 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:39:06,318 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) [2022-02-15 14:39:06,319 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-02-15 14:39:06,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:39:06,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-15 14:39:06,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:39:06,797 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:39:06,797 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:39:07,236 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:39:07,236 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [12031280] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:39:07,236 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:39:07,236 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 24 [2022-02-15 14:39:07,236 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1140559843] [2022-02-15 14:39:07,236 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:39:07,236 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-15 14:39:07,237 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:39:07,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-15 14:39:07,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=501, Unknown=0, NotChecked=0, Total=600 [2022-02-15 14:39:07,237 INFO L87 Difference]: Start difference. First operand 1561 states and 4592 transitions. Second operand has 25 states, 25 states have (on average 3.4) internal successors, (85), 24 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) [2022-02-15 14:39:08,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:39:08,358 INFO L93 Difference]: Finished difference Result 2465 states and 7079 transitions. [2022-02-15 14:39:08,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-02-15 14:39:08,358 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 3.4) internal successors, (85), 24 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) Word has length 33 [2022-02-15 14:39:08,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:39:08,363 INFO L225 Difference]: With dead ends: 2465 [2022-02-15 14:39:08,363 INFO L226 Difference]: Without dead ends: 2450 [2022-02-15 14:39:08,364 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 46 SyntacticMatches, 6 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 514 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=277, Invalid=1363, Unknown=0, NotChecked=0, Total=1640 [2022-02-15 14:39:08,364 INFO L933 BasicCegarLoop]: 118 mSDtfsCounter, 355 mSDsluCounter, 1953 mSDsCounter, 0 mSdLazyCounter, 1295 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 355 SdHoareTripleChecker+Valid, 1347 SdHoareTripleChecker+Invalid, 1457 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 1295 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 121 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-15 14:39:08,364 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [355 Valid, 1347 Invalid, 1457 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 1295 Invalid, 0 Unknown, 121 Unchecked, 0.5s Time] [2022-02-15 14:39:08,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2450 states. [2022-02-15 14:39:08,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2450 to 1624. [2022-02-15 14:39:08,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1624 states, 1623 states have (on average 2.9457794208256316) internal successors, (4781), 1623 states have internal predecessors, (4781), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:39:08,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1624 states to 1624 states and 4781 transitions. [2022-02-15 14:39:08,401 INFO L78 Accepts]: Start accepts. Automaton has 1624 states and 4781 transitions. Word has length 33 [2022-02-15 14:39:08,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:39:08,402 INFO L470 AbstractCegarLoop]: Abstraction has 1624 states and 4781 transitions. [2022-02-15 14:39:08,402 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 3.4) internal successors, (85), 24 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) [2022-02-15 14:39:08,402 INFO L276 IsEmpty]: Start isEmpty. Operand 1624 states and 4781 transitions. [2022-02-15 14:39:08,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-02-15 14:39:08,405 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:39:08,405 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:39:08,425 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-02-15 14:39:08,623 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:39:08,623 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 14:39:08,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:39:08,623 INFO L85 PathProgramCache]: Analyzing trace with hash -1474067439, now seen corresponding path program 8 times [2022-02-15 14:39:08,623 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:39:08,623 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1626257002] [2022-02-15 14:39:08,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:39:08,624 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:39:08,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:39:08,829 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:39:08,829 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:39:08,830 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1626257002] [2022-02-15 14:39:08,830 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1626257002] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:39:08,830 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1122333902] [2022-02-15 14:39:08,830 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-15 14:39:08,830 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:39:08,830 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:39:08,831 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) [2022-02-15 14:39:08,832 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-02-15 14:39:08,859 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-15 14:39:08,859 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:39:08,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 25 conjunts are in the unsatisfiable core [2022-02-15 14:39:08,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:39:09,060 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 5 treesize of output 3 [2022-02-15 14:39:09,295 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:39:09,296 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:39:09,755 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:39:09,756 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1122333902] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:39:09,756 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:39:09,756 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 22 [2022-02-15 14:39:09,756 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [994734173] [2022-02-15 14:39:09,756 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:39:09,756 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-02-15 14:39:09,756 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:39:09,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-02-15 14:39:09,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2022-02-15 14:39:09,757 INFO L87 Difference]: Start difference. First operand 1624 states and 4781 transitions. Second operand has 23 states, 23 states have (on average 3.0434782608695654) internal successors, (70), 22 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:39:10,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:39:10,730 INFO L93 Difference]: Finished difference Result 2828 states and 8159 transitions. [2022-02-15 14:39:10,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-02-15 14:39:10,730 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.0434782608695654) internal successors, (70), 22 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-02-15 14:39:10,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:39:10,736 INFO L225 Difference]: With dead ends: 2828 [2022-02-15 14:39:10,736 INFO L226 Difference]: Without dead ends: 2813 [2022-02-15 14:39:10,737 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 45 SyntacticMatches, 9 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 418 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=218, Invalid=1188, Unknown=0, NotChecked=0, Total=1406 [2022-02-15 14:39:10,737 INFO L933 BasicCegarLoop]: 116 mSDtfsCounter, 325 mSDsluCounter, 1653 mSDsCounter, 0 mSdLazyCounter, 1178 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 325 SdHoareTripleChecker+Valid, 1171 SdHoareTripleChecker+Invalid, 1211 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 1178 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-15 14:39:10,737 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [325 Valid, 1171 Invalid, 1211 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 1178 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-15 14:39:10,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2813 states. [2022-02-15 14:39:10,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2813 to 1666. [2022-02-15 14:39:10,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1666 states, 1665 states have (on average 2.926126126126126) internal successors, (4872), 1665 states have internal predecessors, (4872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:39:10,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1666 states to 1666 states and 4872 transitions. [2022-02-15 14:39:10,766 INFO L78 Accepts]: Start accepts. Automaton has 1666 states and 4872 transitions. Word has length 33 [2022-02-15 14:39:10,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:39:10,767 INFO L470 AbstractCegarLoop]: Abstraction has 1666 states and 4872 transitions. [2022-02-15 14:39:10,767 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.0434782608695654) internal successors, (70), 22 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:39:10,767 INFO L276 IsEmpty]: Start isEmpty. Operand 1666 states and 4872 transitions. [2022-02-15 14:39:10,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-02-15 14:39:10,770 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:39:10,770 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:39:10,787 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-02-15 14:39:10,983 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-02-15 14:39:10,983 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 14:39:10,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:39:10,984 INFO L85 PathProgramCache]: Analyzing trace with hash 1874168057, now seen corresponding path program 9 times [2022-02-15 14:39:10,984 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:39:10,984 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1123017393] [2022-02-15 14:39:10,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:39:10,984 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:39:10,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:39:11,225 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:39:11,225 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:39:11,225 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1123017393] [2022-02-15 14:39:11,226 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1123017393] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:39:11,226 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [231650152] [2022-02-15 14:39:11,226 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-15 14:39:11,226 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:39:11,226 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:39:11,227 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) [2022-02-15 14:39:11,227 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-02-15 14:39:11,256 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-02-15 14:39:11,256 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:39:11,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 25 conjunts are in the unsatisfiable core [2022-02-15 14:39:11,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:39:11,450 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-02-15 14:39:11,650 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:39:11,650 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:39:12,147 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:39:12,148 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [231650152] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:39:12,148 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:39:12,148 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 23 [2022-02-15 14:39:12,148 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [49842837] [2022-02-15 14:39:12,148 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:39:12,148 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-02-15 14:39:12,148 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:39:12,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-02-15 14:39:12,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=456, Unknown=0, NotChecked=0, Total=552 [2022-02-15 14:39:12,149 INFO L87 Difference]: Start difference. First operand 1666 states and 4872 transitions. Second operand has 24 states, 24 states have (on average 2.9583333333333335) internal successors, (71), 23 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:39:13,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:39:13,137 INFO L93 Difference]: Finished difference Result 3012 states and 8678 transitions. [2022-02-15 14:39:13,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-02-15 14:39:13,137 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.9583333333333335) internal successors, (71), 23 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-02-15 14:39:13,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:39:13,143 INFO L225 Difference]: With dead ends: 3012 [2022-02-15 14:39:13,143 INFO L226 Difference]: Without dead ends: 2997 [2022-02-15 14:39:13,143 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 45 SyntacticMatches, 8 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 493 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=277, Invalid=1363, Unknown=0, NotChecked=0, Total=1640 [2022-02-15 14:39:13,143 INFO L933 BasicCegarLoop]: 112 mSDtfsCounter, 421 mSDsluCounter, 1671 mSDsCounter, 0 mSdLazyCounter, 1235 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 421 SdHoareTripleChecker+Valid, 1193 SdHoareTripleChecker+Invalid, 1269 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 1235 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-15 14:39:13,144 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [421 Valid, 1193 Invalid, 1269 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 1235 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-15 14:39:13,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2997 states. [2022-02-15 14:39:13,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2997 to 1708. [2022-02-15 14:39:13,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1708 states, 1707 states have (on average 2.919742237844171) internal successors, (4984), 1707 states have internal predecessors, (4984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:39:13,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1708 states to 1708 states and 4984 transitions. [2022-02-15 14:39:13,171 INFO L78 Accepts]: Start accepts. Automaton has 1708 states and 4984 transitions. Word has length 33 [2022-02-15 14:39:13,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:39:13,171 INFO L470 AbstractCegarLoop]: Abstraction has 1708 states and 4984 transitions. [2022-02-15 14:39:13,171 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.9583333333333335) internal successors, (71), 23 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:39:13,171 INFO L276 IsEmpty]: Start isEmpty. Operand 1708 states and 4984 transitions. [2022-02-15 14:39:13,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-02-15 14:39:13,175 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:39:13,175 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:39:13,192 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-02-15 14:39:13,390 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:39:13,391 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 14:39:13,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:39:13,391 INFO L85 PathProgramCache]: Analyzing trace with hash 1719730539, now seen corresponding path program 10 times [2022-02-15 14:39:13,391 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:39:13,391 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [300490772] [2022-02-15 14:39:13,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:39:13,391 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:39:13,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:39:13,596 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:39:13,596 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:39:13,596 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [300490772] [2022-02-15 14:39:13,596 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [300490772] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:39:13,596 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1485976142] [2022-02-15 14:39:13,596 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-15 14:39:13,596 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:39:13,597 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:39:13,597 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) [2022-02-15 14:39:13,598 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-02-15 14:39:13,622 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-15 14:39:13,622 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:39:13,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-15 14:39:13,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:39:14,007 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:39:14,007 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:39:14,420 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:39:14,421 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1485976142] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:39:14,421 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:39:14,421 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 25 [2022-02-15 14:39:14,421 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015262554] [2022-02-15 14:39:14,421 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:39:14,421 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-15 14:39:14,421 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:39:14,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-15 14:39:14,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=537, Unknown=0, NotChecked=0, Total=650 [2022-02-15 14:39:14,422 INFO L87 Difference]: Start difference. First operand 1708 states and 4984 transitions. Second operand has 26 states, 26 states have (on average 3.3076923076923075) internal successors, (86), 25 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:39:15,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:39:15,537 INFO L93 Difference]: Finished difference Result 3300 states and 9373 transitions. [2022-02-15 14:39:15,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-02-15 14:39:15,537 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 3.3076923076923075) internal successors, (86), 25 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-02-15 14:39:15,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:39:15,561 INFO L225 Difference]: With dead ends: 3300 [2022-02-15 14:39:15,561 INFO L226 Difference]: Without dead ends: 3279 [2022-02-15 14:39:15,562 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 47 SyntacticMatches, 5 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 614 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=321, Invalid=1571, Unknown=0, NotChecked=0, Total=1892 [2022-02-15 14:39:15,563 INFO L933 BasicCegarLoop]: 105 mSDtfsCounter, 402 mSDsluCounter, 1973 mSDsCounter, 0 mSdLazyCounter, 1297 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 402 SdHoareTripleChecker+Valid, 1330 SdHoareTripleChecker+Invalid, 1461 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 1297 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 136 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-15 14:39:15,563 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [402 Valid, 1330 Invalid, 1461 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 1297 Invalid, 0 Unknown, 136 Unchecked, 0.5s Time] [2022-02-15 14:39:15,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3279 states. [2022-02-15 14:39:15,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3279 to 1732. [2022-02-15 14:39:15,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1732 states, 1731 states have (on average 2.9254766031195842) internal successors, (5064), 1731 states have internal predecessors, (5064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:39:15,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1732 states to 1732 states and 5064 transitions. [2022-02-15 14:39:15,597 INFO L78 Accepts]: Start accepts. Automaton has 1732 states and 5064 transitions. Word has length 33 [2022-02-15 14:39:15,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:39:15,598 INFO L470 AbstractCegarLoop]: Abstraction has 1732 states and 5064 transitions. [2022-02-15 14:39:15,598 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 3.3076923076923075) internal successors, (86), 25 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:39:15,598 INFO L276 IsEmpty]: Start isEmpty. Operand 1732 states and 5064 transitions. [2022-02-15 14:39:15,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-02-15 14:39:15,600 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:39:15,600 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:39:15,617 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-02-15 14:39:15,816 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-02-15 14:39:15,817 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 14:39:15,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:39:15,817 INFO L85 PathProgramCache]: Analyzing trace with hash 143113699, now seen corresponding path program 11 times [2022-02-15 14:39:15,817 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:39:15,817 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1543257939] [2022-02-15 14:39:15,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:39:15,817 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:39:15,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:39:16,038 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:39:16,038 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:39:16,038 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1543257939] [2022-02-15 14:39:16,039 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1543257939] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:39:16,039 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1117026003] [2022-02-15 14:39:16,039 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-15 14:39:16,039 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:39:16,039 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:39:16,040 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) [2022-02-15 14:39:16,040 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-02-15 14:39:16,064 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-15 14:39:16,064 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:39:16,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-15 14:39:16,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:39:16,415 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:39:16,415 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:39:16,824 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:39:16,824 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1117026003] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:39:16,825 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:39:16,825 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 25 [2022-02-15 14:39:16,825 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1286206129] [2022-02-15 14:39:16,825 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:39:16,825 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-15 14:39:16,825 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:39:16,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-15 14:39:16,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=537, Unknown=0, NotChecked=0, Total=650 [2022-02-15 14:39:16,827 INFO L87 Difference]: Start difference. First operand 1732 states and 5064 transitions. Second operand has 26 states, 26 states have (on average 3.3076923076923075) internal successors, (86), 25 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:39:17,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:39:17,856 INFO L93 Difference]: Finished difference Result 3115 states and 8946 transitions. [2022-02-15 14:39:17,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-02-15 14:39:17,856 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 3.3076923076923075) internal successors, (86), 25 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-02-15 14:39:17,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:39:17,863 INFO L225 Difference]: With dead ends: 3115 [2022-02-15 14:39:17,863 INFO L226 Difference]: Without dead ends: 3100 [2022-02-15 14:39:17,864 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 46 SyntacticMatches, 5 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 537 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=278, Invalid=1362, Unknown=0, NotChecked=0, Total=1640 [2022-02-15 14:39:17,864 INFO L933 BasicCegarLoop]: 115 mSDtfsCounter, 425 mSDsluCounter, 1959 mSDsCounter, 0 mSdLazyCounter, 1461 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 425 SdHoareTripleChecker+Valid, 1335 SdHoareTripleChecker+Invalid, 1500 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 1461 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-15 14:39:17,867 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [425 Valid, 1335 Invalid, 1500 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 1461 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-15 14:39:17,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3100 states. [2022-02-15 14:39:17,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3100 to 1708. [2022-02-15 14:39:17,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1708 states, 1707 states have (on average 2.919742237844171) internal successors, (4984), 1707 states have internal predecessors, (4984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:39:17,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1708 states to 1708 states and 4984 transitions. [2022-02-15 14:39:17,896 INFO L78 Accepts]: Start accepts. Automaton has 1708 states and 4984 transitions. Word has length 33 [2022-02-15 14:39:17,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:39:17,896 INFO L470 AbstractCegarLoop]: Abstraction has 1708 states and 4984 transitions. [2022-02-15 14:39:17,896 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 3.3076923076923075) internal successors, (86), 25 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:39:17,896 INFO L276 IsEmpty]: Start isEmpty. Operand 1708 states and 4984 transitions. [2022-02-15 14:39:17,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-02-15 14:39:17,898 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:39:17,898 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:39:17,914 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-02-15 14:39:18,111 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-02-15 14:39:18,111 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 14:39:18,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:39:18,111 INFO L85 PathProgramCache]: Analyzing trace with hash -679839295, now seen corresponding path program 12 times [2022-02-15 14:39:18,111 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:39:18,111 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [49536676] [2022-02-15 14:39:18,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:39:18,112 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:39:18,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:39:18,309 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:39:18,309 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:39:18,309 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [49536676] [2022-02-15 14:39:18,309 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [49536676] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:39:18,309 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2129078982] [2022-02-15 14:39:18,309 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-15 14:39:18,309 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:39:18,309 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:39:18,310 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) [2022-02-15 14:39:18,311 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-02-15 14:39:18,334 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-02-15 14:39:18,334 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:39:18,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 25 conjunts are in the unsatisfiable core [2022-02-15 14:39:18,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:39:18,527 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 5 treesize of output 3 [2022-02-15 14:39:18,829 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:39:18,829 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:39:19,222 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:39:19,223 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2129078982] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:39:19,223 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:39:19,223 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 24 [2022-02-15 14:39:19,223 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2039191328] [2022-02-15 14:39:19,223 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:39:19,223 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-15 14:39:19,223 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:39:19,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-15 14:39:19,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=498, Unknown=0, NotChecked=0, Total=600 [2022-02-15 14:39:19,224 INFO L87 Difference]: Start difference. First operand 1708 states and 4984 transitions. Second operand has 25 states, 25 states have (on average 3.4) internal successors, (85), 24 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) [2022-02-15 14:39:20,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:39:20,432 INFO L93 Difference]: Finished difference Result 2497 states and 7196 transitions. [2022-02-15 14:39:20,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-02-15 14:39:20,432 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 3.4) internal successors, (85), 24 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) Word has length 33 [2022-02-15 14:39:20,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:39:20,436 INFO L225 Difference]: With dead ends: 2497 [2022-02-15 14:39:20,436 INFO L226 Difference]: Without dead ends: 2478 [2022-02-15 14:39:20,437 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 45 SyntacticMatches, 7 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 545 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=295, Invalid=1511, Unknown=0, NotChecked=0, Total=1806 [2022-02-15 14:39:20,437 INFO L933 BasicCegarLoop]: 117 mSDtfsCounter, 368 mSDsluCounter, 2037 mSDsCounter, 0 mSdLazyCounter, 1553 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 368 SdHoareTripleChecker+Valid, 1416 SdHoareTripleChecker+Invalid, 1603 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 1553 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-15 14:39:20,438 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [368 Valid, 1416 Invalid, 1603 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 1553 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-15 14:39:20,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2478 states. [2022-02-15 14:39:20,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2478 to 1734. [2022-02-15 14:39:20,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1734 states, 1733 states have (on average 2.9272937103289096) internal successors, (5073), 1733 states have internal predecessors, (5073), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:39:20,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1734 states to 1734 states and 5073 transitions. [2022-02-15 14:39:20,464 INFO L78 Accepts]: Start accepts. Automaton has 1734 states and 5073 transitions. Word has length 33 [2022-02-15 14:39:20,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:39:20,465 INFO L470 AbstractCegarLoop]: Abstraction has 1734 states and 5073 transitions. [2022-02-15 14:39:20,465 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 3.4) internal successors, (85), 24 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) [2022-02-15 14:39:20,465 INFO L276 IsEmpty]: Start isEmpty. Operand 1734 states and 5073 transitions. [2022-02-15 14:39:20,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-02-15 14:39:20,467 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:39:20,467 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:39:20,485 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-02-15 14:39:20,683 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-02-15 14:39:20,683 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 14:39:20,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:39:20,683 INFO L85 PathProgramCache]: Analyzing trace with hash 196343169, now seen corresponding path program 13 times [2022-02-15 14:39:20,683 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:39:20,683 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [704604699] [2022-02-15 14:39:20,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:39:20,683 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:39:20,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:39:20,895 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:39:20,895 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:39:20,895 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [704604699] [2022-02-15 14:39:20,895 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [704604699] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:39:20,895 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1595810941] [2022-02-15 14:39:20,895 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-15 14:39:20,896 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:39:20,896 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:39:20,896 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) [2022-02-15 14:39:20,897 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-02-15 14:39:20,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:39:20,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-15 14:39:20,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:39:21,319 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:39:21,319 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:39:21,711 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:39:21,711 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1595810941] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:39:21,711 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:39:21,711 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 21 [2022-02-15 14:39:21,711 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646147196] [2022-02-15 14:39:21,711 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:39:21,712 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-15 14:39:21,712 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:39:21,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-15 14:39:21,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=382, Unknown=0, NotChecked=0, Total=462 [2022-02-15 14:39:21,712 INFO L87 Difference]: Start difference. First operand 1734 states and 5073 transitions. Second operand has 22 states, 22 states have (on average 3.227272727272727) internal successors, (71), 21 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:39:22,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:39:22,829 INFO L93 Difference]: Finished difference Result 2497 states and 7190 transitions. [2022-02-15 14:39:22,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-02-15 14:39:22,829 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.227272727272727) internal successors, (71), 21 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-02-15 14:39:22,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:39:22,833 INFO L225 Difference]: With dead ends: 2497 [2022-02-15 14:39:22,833 INFO L226 Difference]: Without dead ends: 2482 [2022-02-15 14:39:22,834 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 49 SyntacticMatches, 6 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 416 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=281, Invalid=1279, Unknown=0, NotChecked=0, Total=1560 [2022-02-15 14:39:22,834 INFO L933 BasicCegarLoop]: 118 mSDtfsCounter, 450 mSDsluCounter, 1279 mSDsCounter, 0 mSdLazyCounter, 1097 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 450 SdHoareTripleChecker+Valid, 909 SdHoareTripleChecker+Invalid, 1155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 1097 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-15 14:39:22,834 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [450 Valid, 909 Invalid, 1155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 1097 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-15 14:39:22,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2482 states. [2022-02-15 14:39:22,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2482 to 1730. [2022-02-15 14:39:22,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1730 states, 1729 states have (on average 2.925968768074031) internal successors, (5059), 1729 states have internal predecessors, (5059), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:39:22,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1730 states to 1730 states and 5059 transitions. [2022-02-15 14:39:22,858 INFO L78 Accepts]: Start accepts. Automaton has 1730 states and 5059 transitions. Word has length 33 [2022-02-15 14:39:22,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:39:22,858 INFO L470 AbstractCegarLoop]: Abstraction has 1730 states and 5059 transitions. [2022-02-15 14:39:22,858 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.227272727272727) internal successors, (71), 21 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:39:22,858 INFO L276 IsEmpty]: Start isEmpty. Operand 1730 states and 5059 transitions. [2022-02-15 14:39:22,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-02-15 14:39:22,861 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:39:22,861 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:39:22,887 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-02-15 14:39:23,075 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-02-15 14:39:23,076 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 14:39:23,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:39:23,076 INFO L85 PathProgramCache]: Analyzing trace with hash -1906792959, now seen corresponding path program 14 times [2022-02-15 14:39:23,076 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:39:23,076 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [20677194] [2022-02-15 14:39:23,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:39:23,076 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:39:23,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:39:23,274 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:39:23,274 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:39:23,274 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [20677194] [2022-02-15 14:39:23,274 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [20677194] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:39:23,274 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1578943427] [2022-02-15 14:39:23,274 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-15 14:39:23,274 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:39:23,274 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:39:23,275 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) [2022-02-15 14:39:23,276 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-02-15 14:39:23,300 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-15 14:39:23,300 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:39:23,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 25 conjunts are in the unsatisfiable core [2022-02-15 14:39:23,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:39:23,482 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-02-15 14:39:23,717 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:39:23,717 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:39:24,105 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:39:24,106 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1578943427] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:39:24,106 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:39:24,106 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 24 [2022-02-15 14:39:24,106 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [861892349] [2022-02-15 14:39:24,106 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:39:24,106 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-15 14:39:24,106 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:39:24,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-15 14:39:24,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=494, Unknown=0, NotChecked=0, Total=600 [2022-02-15 14:39:24,107 INFO L87 Difference]: Start difference. First operand 1730 states and 5059 transitions. Second operand has 25 states, 25 states have (on average 3.4) internal successors, (85), 24 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) [2022-02-15 14:39:24,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:39:24,938 INFO L93 Difference]: Finished difference Result 2669 states and 7766 transitions. [2022-02-15 14:39:24,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-02-15 14:39:24,938 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 3.4) internal successors, (85), 24 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) Word has length 33 [2022-02-15 14:39:24,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:39:24,943 INFO L225 Difference]: With dead ends: 2669 [2022-02-15 14:39:24,943 INFO L226 Difference]: Without dead ends: 2650 [2022-02-15 14:39:24,944 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 45 SyntacticMatches, 7 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 452 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=242, Invalid=1164, Unknown=0, NotChecked=0, Total=1406 [2022-02-15 14:39:24,944 INFO L933 BasicCegarLoop]: 95 mSDtfsCounter, 284 mSDsluCounter, 1456 mSDsCounter, 0 mSdLazyCounter, 1141 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 284 SdHoareTripleChecker+Valid, 1014 SdHoareTripleChecker+Invalid, 1177 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 1141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-15 14:39:24,944 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [284 Valid, 1014 Invalid, 1177 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 1141 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-15 14:39:24,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2650 states. [2022-02-15 14:39:24,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2650 to 1752. [2022-02-15 14:39:24,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1752 states, 1751 states have (on average 2.9194745859508853) internal successors, (5112), 1751 states have internal predecessors, (5112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:39:24,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1752 states to 1752 states and 5112 transitions. [2022-02-15 14:39:24,970 INFO L78 Accepts]: Start accepts. Automaton has 1752 states and 5112 transitions. Word has length 33 [2022-02-15 14:39:24,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:39:24,971 INFO L470 AbstractCegarLoop]: Abstraction has 1752 states and 5112 transitions. [2022-02-15 14:39:24,971 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 3.4) internal successors, (85), 24 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) [2022-02-15 14:39:24,971 INFO L276 IsEmpty]: Start isEmpty. Operand 1752 states and 5112 transitions. [2022-02-15 14:39:24,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-02-15 14:39:24,973 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:39:24,973 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:39:24,989 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-02-15 14:39:25,189 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:39:25,189 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 14:39:25,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:39:25,190 INFO L85 PathProgramCache]: Analyzing trace with hash 555256933, now seen corresponding path program 15 times [2022-02-15 14:39:25,190 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:39:25,190 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [51666510] [2022-02-15 14:39:25,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:39:25,190 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:39:25,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:39:25,397 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:39:25,397 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:39:25,397 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [51666510] [2022-02-15 14:39:25,397 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [51666510] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:39:25,397 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [935581193] [2022-02-15 14:39:25,397 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-15 14:39:25,397 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:39:25,397 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:39:25,399 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) [2022-02-15 14:39:25,399 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-02-15 14:39:25,423 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-15 14:39:25,424 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:39:25,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 22 conjunts are in the unsatisfiable core [2022-02-15 14:39:25,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:39:25,821 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:39:25,821 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:39:26,211 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:39:26,211 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [935581193] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:39:26,211 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:39:26,211 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 24 [2022-02-15 14:39:26,211 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930868501] [2022-02-15 14:39:26,211 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:39:26,211 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-15 14:39:26,212 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:39:26,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-15 14:39:26,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=495, Unknown=0, NotChecked=0, Total=600 [2022-02-15 14:39:26,212 INFO L87 Difference]: Start difference. First operand 1752 states and 5112 transitions. Second operand has 25 states, 25 states have (on average 3.4) internal successors, (85), 24 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) [2022-02-15 14:39:27,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:39:27,020 INFO L93 Difference]: Finished difference Result 2695 states and 7817 transitions. [2022-02-15 14:39:27,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-02-15 14:39:27,020 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 3.4) internal successors, (85), 24 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) Word has length 33 [2022-02-15 14:39:27,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:39:27,024 INFO L225 Difference]: With dead ends: 2695 [2022-02-15 14:39:27,024 INFO L226 Difference]: Without dead ends: 2680 [2022-02-15 14:39:27,025 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 46 SyntacticMatches, 6 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 450 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=255, Invalid=1227, Unknown=0, NotChecked=0, Total=1482 [2022-02-15 14:39:27,025 INFO L933 BasicCegarLoop]: 95 mSDtfsCounter, 297 mSDsluCounter, 1564 mSDsCounter, 0 mSdLazyCounter, 1204 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 297 SdHoareTripleChecker+Valid, 1078 SdHoareTripleChecker+Invalid, 1239 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 1204 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-15 14:39:27,025 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [297 Valid, 1078 Invalid, 1239 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 1204 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-15 14:39:27,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2680 states. [2022-02-15 14:39:27,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2680 to 1752. [2022-02-15 14:39:27,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1752 states, 1751 states have (on average 2.9194745859508853) internal successors, (5112), 1751 states have internal predecessors, (5112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:39:27,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1752 states to 1752 states and 5112 transitions. [2022-02-15 14:39:27,050 INFO L78 Accepts]: Start accepts. Automaton has 1752 states and 5112 transitions. Word has length 33 [2022-02-15 14:39:27,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:39:27,050 INFO L470 AbstractCegarLoop]: Abstraction has 1752 states and 5112 transitions. [2022-02-15 14:39:27,050 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 3.4) internal successors, (85), 24 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) [2022-02-15 14:39:27,050 INFO L276 IsEmpty]: Start isEmpty. Operand 1752 states and 5112 transitions. [2022-02-15 14:39:27,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-02-15 14:39:27,053 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:39:27,053 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:39:27,082 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-02-15 14:39:27,260 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-02-15 14:39:27,260 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 14:39:27,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:39:27,260 INFO L85 PathProgramCache]: Analyzing trace with hash -300690715, now seen corresponding path program 16 times [2022-02-15 14:39:27,261 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:39:27,261 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1138844501] [2022-02-15 14:39:27,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:39:27,261 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:39:27,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:39:27,463 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:39:27,463 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:39:27,463 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1138844501] [2022-02-15 14:39:27,463 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1138844501] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:39:27,463 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [729155308] [2022-02-15 14:39:27,463 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-15 14:39:27,463 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:39:27,463 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:39:27,464 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) [2022-02-15 14:39:27,465 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-02-15 14:39:27,487 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-15 14:39:27,487 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:39:27,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-15 14:39:27,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:39:27,869 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:39:27,869 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:39:28,264 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:39:28,264 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [729155308] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:39:28,264 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:39:28,264 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 21 [2022-02-15 14:39:28,264 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1459804161] [2022-02-15 14:39:28,264 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:39:28,264 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-15 14:39:28,264 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:39:28,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-15 14:39:28,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=382, Unknown=0, NotChecked=0, Total=462 [2022-02-15 14:39:28,265 INFO L87 Difference]: Start difference. First operand 1752 states and 5112 transitions. Second operand has 22 states, 22 states have (on average 3.227272727272727) internal successors, (71), 21 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:39:29,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:39:29,500 INFO L93 Difference]: Finished difference Result 2604 states and 7441 transitions. [2022-02-15 14:39:29,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-02-15 14:39:29,500 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.227272727272727) internal successors, (71), 21 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-02-15 14:39:29,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:39:29,504 INFO L225 Difference]: With dead ends: 2604 [2022-02-15 14:39:29,504 INFO L226 Difference]: Without dead ends: 2589 [2022-02-15 14:39:29,504 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 48 SyntacticMatches, 7 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 432 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=281, Invalid=1279, Unknown=0, NotChecked=0, Total=1560 [2022-02-15 14:39:29,505 INFO L933 BasicCegarLoop]: 109 mSDtfsCounter, 415 mSDsluCounter, 1725 mSDsCounter, 0 mSdLazyCounter, 1414 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 415 SdHoareTripleChecker+Valid, 1184 SdHoareTripleChecker+Invalid, 1471 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 1414 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-15 14:39:29,505 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [415 Valid, 1184 Invalid, 1471 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 1414 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-15 14:39:29,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2589 states. [2022-02-15 14:39:29,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2589 to 1773. [2022-02-15 14:39:29,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1773 states, 1772 states have (on average 2.9283295711060946) internal successors, (5189), 1772 states have internal predecessors, (5189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:39:29,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1773 states to 1773 states and 5189 transitions. [2022-02-15 14:39:29,530 INFO L78 Accepts]: Start accepts. Automaton has 1773 states and 5189 transitions. Word has length 33 [2022-02-15 14:39:29,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:39:29,530 INFO L470 AbstractCegarLoop]: Abstraction has 1773 states and 5189 transitions. [2022-02-15 14:39:29,530 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.227272727272727) internal successors, (71), 21 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:39:29,530 INFO L276 IsEmpty]: Start isEmpty. Operand 1773 states and 5189 transitions. [2022-02-15 14:39:29,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-02-15 14:39:29,532 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:39:29,532 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:39:29,550 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-02-15 14:39:29,739 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:39:29,739 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 14:39:29,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:39:29,740 INFO L85 PathProgramCache]: Analyzing trace with hash -1967089301, now seen corresponding path program 17 times [2022-02-15 14:39:29,740 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:39:29,740 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1052140414] [2022-02-15 14:39:29,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:39:29,740 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:39:29,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:39:29,923 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:39:29,923 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:39:29,923 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1052140414] [2022-02-15 14:39:29,923 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1052140414] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:39:29,923 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1194698120] [2022-02-15 14:39:29,923 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-15 14:39:29,923 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:39:29,923 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:39:29,924 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) [2022-02-15 14:39:29,925 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-02-15 14:39:29,948 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-15 14:39:29,948 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:39:29,949 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-15 14:39:29,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:39:30,296 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:39:30,296 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:39:30,685 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:39:30,685 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1194698120] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:39:30,685 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:39:30,685 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 21 [2022-02-15 14:39:30,685 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [46911637] [2022-02-15 14:39:30,685 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:39:30,686 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-15 14:39:30,686 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:39:30,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-15 14:39:30,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=386, Unknown=0, NotChecked=0, Total=462 [2022-02-15 14:39:30,686 INFO L87 Difference]: Start difference. First operand 1773 states and 5189 transitions. Second operand has 22 states, 22 states have (on average 3.227272727272727) internal successors, (71), 21 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:39:31,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:39:31,753 INFO L93 Difference]: Finished difference Result 2575 states and 7376 transitions. [2022-02-15 14:39:31,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-02-15 14:39:31,753 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.227272727272727) internal successors, (71), 21 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-02-15 14:39:31,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:39:31,757 INFO L225 Difference]: With dead ends: 2575 [2022-02-15 14:39:31,757 INFO L226 Difference]: Without dead ends: 2560 [2022-02-15 14:39:31,757 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 48 SyntacticMatches, 7 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 444 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=257, Invalid=1303, Unknown=0, NotChecked=0, Total=1560 [2022-02-15 14:39:31,758 INFO L933 BasicCegarLoop]: 113 mSDtfsCounter, 362 mSDsluCounter, 1298 mSDsCounter, 0 mSdLazyCounter, 1025 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 362 SdHoareTripleChecker+Valid, 930 SdHoareTripleChecker+Invalid, 1070 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 1025 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-15 14:39:31,758 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [362 Valid, 930 Invalid, 1070 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 1025 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-15 14:39:31,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2560 states. [2022-02-15 14:39:31,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2560 to 1752. [2022-02-15 14:39:31,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1752 states, 1751 states have (on average 2.9194745859508853) internal successors, (5112), 1751 states have internal predecessors, (5112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:39:31,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1752 states to 1752 states and 5112 transitions. [2022-02-15 14:39:31,782 INFO L78 Accepts]: Start accepts. Automaton has 1752 states and 5112 transitions. Word has length 33 [2022-02-15 14:39:31,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:39:31,782 INFO L470 AbstractCegarLoop]: Abstraction has 1752 states and 5112 transitions. [2022-02-15 14:39:31,782 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.227272727272727) internal successors, (71), 21 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:39:31,782 INFO L276 IsEmpty]: Start isEmpty. Operand 1752 states and 5112 transitions. [2022-02-15 14:39:31,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-02-15 14:39:31,785 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:39:31,785 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:39:31,801 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-02-15 14:39:32,001 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:39:32,001 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 14:39:32,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:39:32,001 INFO L85 PathProgramCache]: Analyzing trace with hash 1441716885, now seen corresponding path program 18 times [2022-02-15 14:39:32,002 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:39:32,002 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1227435712] [2022-02-15 14:39:32,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:39:32,002 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:39:32,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:39:32,186 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:39:32,186 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:39:32,186 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1227435712] [2022-02-15 14:39:32,186 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1227435712] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:39:32,186 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [100218713] [2022-02-15 14:39:32,186 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-15 14:39:32,186 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:39:32,186 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:39:32,187 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) [2022-02-15 14:39:32,188 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-02-15 14:39:32,212 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-02-15 14:39:32,212 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:39:32,213 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 25 conjunts are in the unsatisfiable core [2022-02-15 14:39:32,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:39:32,408 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-02-15 14:39:32,664 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:39:32,664 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:39:33,078 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:39:33,078 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [100218713] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:39:33,078 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:39:33,078 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 25 [2022-02-15 14:39:33,078 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814958477] [2022-02-15 14:39:33,079 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:39:33,079 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-15 14:39:33,079 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:39:33,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-15 14:39:33,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=540, Unknown=0, NotChecked=0, Total=650 [2022-02-15 14:39:33,080 INFO L87 Difference]: Start difference. First operand 1752 states and 5112 transitions. Second operand has 26 states, 26 states have (on average 3.3076923076923075) internal successors, (86), 25 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:39:34,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:39:34,221 INFO L93 Difference]: Finished difference Result 3000 states and 8661 transitions. [2022-02-15 14:39:34,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-02-15 14:39:34,221 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 3.3076923076923075) internal successors, (86), 25 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-02-15 14:39:34,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:39:34,226 INFO L225 Difference]: With dead ends: 3000 [2022-02-15 14:39:34,226 INFO L226 Difference]: Without dead ends: 2981 [2022-02-15 14:39:34,226 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 44 SyntacticMatches, 7 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 646 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=331, Invalid=1739, Unknown=0, NotChecked=0, Total=2070 [2022-02-15 14:39:34,227 INFO L933 BasicCegarLoop]: 118 mSDtfsCounter, 390 mSDsluCounter, 1867 mSDsCounter, 0 mSdLazyCounter, 1402 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 390 SdHoareTripleChecker+Valid, 1336 SdHoareTripleChecker+Invalid, 1452 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 1402 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-15 14:39:34,227 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [390 Valid, 1336 Invalid, 1452 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 1402 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-15 14:39:34,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2981 states. [2022-02-15 14:39:34,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2981 to 1760. [2022-02-15 14:39:34,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1760 states, 1759 states have (on average 2.920977828311541) internal successors, (5138), 1759 states have internal predecessors, (5138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:39:34,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1760 states to 1760 states and 5138 transitions. [2022-02-15 14:39:34,268 INFO L78 Accepts]: Start accepts. Automaton has 1760 states and 5138 transitions. Word has length 33 [2022-02-15 14:39:34,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:39:34,268 INFO L470 AbstractCegarLoop]: Abstraction has 1760 states and 5138 transitions. [2022-02-15 14:39:34,269 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 3.3076923076923075) internal successors, (86), 25 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:39:34,269 INFO L276 IsEmpty]: Start isEmpty. Operand 1760 states and 5138 transitions. [2022-02-15 14:39:34,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-02-15 14:39:34,272 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:39:34,272 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:39:34,289 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-02-15 14:39:34,475 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:39:34,475 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 14:39:34,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:39:34,476 INFO L85 PathProgramCache]: Analyzing trace with hash -1977067947, now seen corresponding path program 19 times [2022-02-15 14:39:34,476 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:39:34,476 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [392562192] [2022-02-15 14:39:34,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:39:34,476 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:39:34,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:39:34,677 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:39:34,677 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:39:34,677 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [392562192] [2022-02-15 14:39:34,677 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [392562192] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:39:34,677 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1900273842] [2022-02-15 14:39:34,677 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-15 14:39:34,677 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:39:34,678 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:39:34,678 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) [2022-02-15 14:39:34,681 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-02-15 14:39:34,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:39:34,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-15 14:39:34,712 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:39:35,076 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:39:35,076 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:39:35,491 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:39:35,492 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1900273842] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:39:35,492 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:39:35,492 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 22 [2022-02-15 14:39:35,492 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522664179] [2022-02-15 14:39:35,492 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:39:35,505 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-02-15 14:39:35,505 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:39:35,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-02-15 14:39:35,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=422, Unknown=0, NotChecked=0, Total=506 [2022-02-15 14:39:35,506 INFO L87 Difference]: Start difference. First operand 1760 states and 5138 transitions. Second operand has 23 states, 23 states have (on average 3.130434782608696) internal successors, (72), 22 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:39:36,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:39:36,753 INFO L93 Difference]: Finished difference Result 2579 states and 7434 transitions. [2022-02-15 14:39:36,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-02-15 14:39:36,754 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.130434782608696) internal successors, (72), 22 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-02-15 14:39:36,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:39:36,757 INFO L225 Difference]: With dead ends: 2579 [2022-02-15 14:39:36,757 INFO L226 Difference]: Without dead ends: 2564 [2022-02-15 14:39:36,758 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 48 SyntacticMatches, 6 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 507 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=323, Invalid=1569, Unknown=0, NotChecked=0, Total=1892 [2022-02-15 14:39:36,758 INFO L933 BasicCegarLoop]: 131 mSDtfsCounter, 475 mSDsluCounter, 1613 mSDsCounter, 0 mSdLazyCounter, 1272 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 475 SdHoareTripleChecker+Valid, 1166 SdHoareTripleChecker+Invalid, 1327 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 1272 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-15 14:39:36,758 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [475 Valid, 1166 Invalid, 1327 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 1272 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-15 14:39:36,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2564 states. [2022-02-15 14:39:36,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2564 to 1752. [2022-02-15 14:39:36,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1752 states, 1751 states have (on average 2.9194745859508853) internal successors, (5112), 1751 states have internal predecessors, (5112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:39:36,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1752 states to 1752 states and 5112 transitions. [2022-02-15 14:39:36,780 INFO L78 Accepts]: Start accepts. Automaton has 1752 states and 5112 transitions. Word has length 33 [2022-02-15 14:39:36,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:39:36,780 INFO L470 AbstractCegarLoop]: Abstraction has 1752 states and 5112 transitions. [2022-02-15 14:39:36,780 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.130434782608696) internal successors, (72), 22 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:39:36,781 INFO L276 IsEmpty]: Start isEmpty. Operand 1752 states and 5112 transitions. [2022-02-15 14:39:36,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-02-15 14:39:36,783 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:39:36,783 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:39:36,798 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-02-15 14:39:36,985 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:39:36,986 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 14:39:36,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:39:36,986 INFO L85 PathProgramCache]: Analyzing trace with hash -703095831, now seen corresponding path program 20 times [2022-02-15 14:39:36,986 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:39:36,986 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [269026166] [2022-02-15 14:39:36,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:39:36,986 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:39:36,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:39:37,186 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:39:37,186 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:39:37,186 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [269026166] [2022-02-15 14:39:37,186 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [269026166] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:39:37,186 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1727233963] [2022-02-15 14:39:37,186 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-15 14:39:37,187 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:39:37,187 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:39:37,188 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) [2022-02-15 14:39:37,188 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-02-15 14:39:37,211 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-15 14:39:37,211 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:39:37,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 25 conjunts are in the unsatisfiable core [2022-02-15 14:39:37,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:39:37,403 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 5 treesize of output 3 [2022-02-15 14:39:37,666 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:39:37,667 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:39:38,098 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:39:38,099 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1727233963] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:39:38,099 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:39:38,099 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 25 [2022-02-15 14:39:38,099 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721496920] [2022-02-15 14:39:38,099 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:39:38,099 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-15 14:39:38,099 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:39:38,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-15 14:39:38,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=539, Unknown=0, NotChecked=0, Total=650 [2022-02-15 14:39:38,100 INFO L87 Difference]: Start difference. First operand 1752 states and 5112 transitions. Second operand has 26 states, 26 states have (on average 3.3461538461538463) internal successors, (87), 25 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:39:39,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:39:39,463 INFO L93 Difference]: Finished difference Result 2751 states and 7877 transitions. [2022-02-15 14:39:39,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-02-15 14:39:39,463 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 3.3461538461538463) internal successors, (87), 25 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-02-15 14:39:39,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:39:39,467 INFO L225 Difference]: With dead ends: 2751 [2022-02-15 14:39:39,467 INFO L226 Difference]: Without dead ends: 2736 [2022-02-15 14:39:39,468 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 44 SyntacticMatches, 7 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 698 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=393, Invalid=1959, Unknown=0, NotChecked=0, Total=2352 [2022-02-15 14:39:39,468 INFO L933 BasicCegarLoop]: 126 mSDtfsCounter, 393 mSDsluCounter, 2164 mSDsCounter, 0 mSdLazyCounter, 1584 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 393 SdHoareTripleChecker+Valid, 1489 SdHoareTripleChecker+Invalid, 1637 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 1584 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-15 14:39:39,468 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [393 Valid, 1489 Invalid, 1637 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 1584 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-15 14:39:39,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2736 states. [2022-02-15 14:39:39,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2736 to 1794. [2022-02-15 14:39:39,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1794 states, 1793 states have (on average 2.92526491912995) internal successors, (5245), 1793 states have internal predecessors, (5245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:39:39,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1794 states to 1794 states and 5245 transitions. [2022-02-15 14:39:39,492 INFO L78 Accepts]: Start accepts. Automaton has 1794 states and 5245 transitions. Word has length 33 [2022-02-15 14:39:39,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:39:39,492 INFO L470 AbstractCegarLoop]: Abstraction has 1794 states and 5245 transitions. [2022-02-15 14:39:39,492 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 3.3461538461538463) internal successors, (87), 25 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:39:39,492 INFO L276 IsEmpty]: Start isEmpty. Operand 1794 states and 5245 transitions. [2022-02-15 14:39:39,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-02-15 14:39:39,495 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:39:39,495 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:39:39,510 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2022-02-15 14:39:39,695 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-02-15 14:39:39,695 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 14:39:39,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:39:39,695 INFO L85 PathProgramCache]: Analyzing trace with hash 1925472879, now seen corresponding path program 21 times [2022-02-15 14:39:39,695 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:39:39,696 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1837236903] [2022-02-15 14:39:39,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:39:39,696 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:39:39,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:39:39,892 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:39:39,892 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:39:39,892 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1837236903] [2022-02-15 14:39:39,892 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1837236903] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:39:39,892 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1166472373] [2022-02-15 14:39:39,892 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-15 14:39:39,892 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:39:39,892 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:39:39,893 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) [2022-02-15 14:39:39,894 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-02-15 14:39:39,918 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-15 14:39:39,918 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:39:39,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 22 conjunts are in the unsatisfiable core [2022-02-15 14:39:39,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:39:40,327 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:39:40,327 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:39:40,722 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:39:40,722 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1166472373] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:39:40,722 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:39:40,722 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 25 [2022-02-15 14:39:40,723 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [471437755] [2022-02-15 14:39:40,723 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:39:40,723 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-15 14:39:40,723 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:39:40,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-15 14:39:40,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=541, Unknown=0, NotChecked=0, Total=650 [2022-02-15 14:39:40,724 INFO L87 Difference]: Start difference. First operand 1794 states and 5245 transitions. Second operand has 26 states, 26 states have (on average 3.3461538461538463) internal successors, (87), 25 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:39:41,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:39:41,832 INFO L93 Difference]: Finished difference Result 3076 states and 8840 transitions. [2022-02-15 14:39:41,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-02-15 14:39:41,833 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 3.3461538461538463) internal successors, (87), 25 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-02-15 14:39:41,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:39:41,837 INFO L225 Difference]: With dead ends: 3076 [2022-02-15 14:39:41,837 INFO L226 Difference]: Without dead ends: 3061 [2022-02-15 14:39:41,838 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 46 SyntacticMatches, 5 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 611 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=331, Invalid=1739, Unknown=0, NotChecked=0, Total=2070 [2022-02-15 14:39:41,838 INFO L933 BasicCegarLoop]: 119 mSDtfsCounter, 367 mSDsluCounter, 1925 mSDsCounter, 0 mSdLazyCounter, 1383 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 367 SdHoareTripleChecker+Valid, 1349 SdHoareTripleChecker+Invalid, 1423 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 1383 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-15 14:39:41,838 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [367 Valid, 1349 Invalid, 1423 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 1383 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-15 14:39:41,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3061 states. [2022-02-15 14:39:41,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3061 to 1752. [2022-02-15 14:39:41,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1752 states, 1751 states have (on average 2.9194745859508853) internal successors, (5112), 1751 states have internal predecessors, (5112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:39:41,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1752 states to 1752 states and 5112 transitions. [2022-02-15 14:39:41,873 INFO L78 Accepts]: Start accepts. Automaton has 1752 states and 5112 transitions. Word has length 33 [2022-02-15 14:39:41,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:39:41,873 INFO L470 AbstractCegarLoop]: Abstraction has 1752 states and 5112 transitions. [2022-02-15 14:39:41,873 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 3.3461538461538463) internal successors, (87), 25 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:39:41,873 INFO L276 IsEmpty]: Start isEmpty. Operand 1752 states and 5112 transitions. [2022-02-15 14:39:41,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-02-15 14:39:41,875 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:39:41,875 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:39:41,893 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-02-15 14:39:42,089 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2022-02-15 14:39:42,089 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 14:39:42,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:39:42,090 INFO L85 PathProgramCache]: Analyzing trace with hash 503592163, now seen corresponding path program 22 times [2022-02-15 14:39:42,090 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:39:42,090 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [52220594] [2022-02-15 14:39:42,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:39:42,090 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:39:42,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:39:42,268 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:39:42,269 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:39:42,269 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [52220594] [2022-02-15 14:39:42,269 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [52220594] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:39:42,269 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1970689898] [2022-02-15 14:39:42,269 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-15 14:39:42,269 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:39:42,269 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:39:42,270 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) [2022-02-15 14:39:42,270 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-02-15 14:39:42,293 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-15 14:39:42,293 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:39:42,294 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-15 14:39:42,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:39:42,640 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:39:42,640 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:39:43,037 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:39:43,038 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1970689898] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:39:43,038 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:39:43,038 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 22 [2022-02-15 14:39:43,038 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1884731424] [2022-02-15 14:39:43,038 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:39:43,038 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-02-15 14:39:43,038 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:39:43,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-02-15 14:39:43,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=422, Unknown=0, NotChecked=0, Total=506 [2022-02-15 14:39:43,039 INFO L87 Difference]: Start difference. First operand 1752 states and 5112 transitions. Second operand has 23 states, 23 states have (on average 3.130434782608696) internal successors, (72), 22 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:39:44,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:39:44,394 INFO L93 Difference]: Finished difference Result 3531 states and 10017 transitions. [2022-02-15 14:39:44,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-02-15 14:39:44,394 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.130434782608696) internal successors, (72), 22 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-02-15 14:39:44,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:39:44,399 INFO L225 Difference]: With dead ends: 3531 [2022-02-15 14:39:44,399 INFO L226 Difference]: Without dead ends: 3512 [2022-02-15 14:39:44,400 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 48 SyntacticMatches, 6 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 634 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=331, Invalid=1831, Unknown=0, NotChecked=0, Total=2162 [2022-02-15 14:39:44,400 INFO L933 BasicCegarLoop]: 129 mSDtfsCounter, 391 mSDsluCounter, 1970 mSDsCounter, 0 mSdLazyCounter, 1517 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 391 SdHoareTripleChecker+Valid, 1405 SdHoareTripleChecker+Invalid, 1568 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 1517 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-15 14:39:44,400 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [391 Valid, 1405 Invalid, 1568 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 1517 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-15 14:39:44,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3512 states. [2022-02-15 14:39:44,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3512 to 1756. [2022-02-15 14:39:44,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1756 states, 1755 states have (on average 2.920797720797721) internal successors, (5126), 1755 states have internal predecessors, (5126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:39:44,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1756 states to 1756 states and 5126 transitions. [2022-02-15 14:39:44,425 INFO L78 Accepts]: Start accepts. Automaton has 1756 states and 5126 transitions. Word has length 33 [2022-02-15 14:39:44,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:39:44,425 INFO L470 AbstractCegarLoop]: Abstraction has 1756 states and 5126 transitions. [2022-02-15 14:39:44,425 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.130434782608696) internal successors, (72), 22 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:39:44,426 INFO L276 IsEmpty]: Start isEmpty. Operand 1756 states and 5126 transitions. [2022-02-15 14:39:44,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-02-15 14:39:44,428 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:39:44,428 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:39:44,443 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-02-15 14:39:44,643 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:39:44,643 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 14:39:44,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:39:44,644 INFO L85 PathProgramCache]: Analyzing trace with hash 1379774627, now seen corresponding path program 23 times [2022-02-15 14:39:44,644 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:39:44,644 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1518235808] [2022-02-15 14:39:44,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:39:44,644 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:39:44,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:39:44,832 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:39:44,833 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:39:44,833 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1518235808] [2022-02-15 14:39:44,833 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1518235808] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:39:44,833 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [264187056] [2022-02-15 14:39:44,833 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-15 14:39:44,833 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:39:44,833 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:39:44,834 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) [2022-02-15 14:39:44,835 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-02-15 14:39:44,857 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-15 14:39:44,857 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:39:44,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-15 14:39:44,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:39:45,226 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:39:45,227 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:39:45,650 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:39:45,650 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [264187056] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:39:45,650 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:39:45,650 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 22 [2022-02-15 14:39:45,651 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [71793799] [2022-02-15 14:39:45,651 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:39:45,651 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-02-15 14:39:45,651 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:39:45,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-02-15 14:39:45,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=422, Unknown=0, NotChecked=0, Total=506 [2022-02-15 14:39:45,651 INFO L87 Difference]: Start difference. First operand 1756 states and 5126 transitions. Second operand has 23 states, 23 states have (on average 3.130434782608696) internal successors, (72), 22 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:39:47,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:39:47,165 INFO L93 Difference]: Finished difference Result 2999 states and 8496 transitions. [2022-02-15 14:39:47,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-02-15 14:39:47,165 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.130434782608696) internal successors, (72), 22 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-02-15 14:39:47,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:39:47,169 INFO L225 Difference]: With dead ends: 2999 [2022-02-15 14:39:47,169 INFO L226 Difference]: Without dead ends: 2984 [2022-02-15 14:39:47,170 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 48 SyntacticMatches, 6 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 706 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=383, Invalid=2067, Unknown=0, NotChecked=0, Total=2450 [2022-02-15 14:39:47,170 INFO L933 BasicCegarLoop]: 130 mSDtfsCounter, 507 mSDsluCounter, 1666 mSDsCounter, 0 mSdLazyCounter, 1282 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 507 SdHoareTripleChecker+Valid, 1195 SdHoareTripleChecker+Invalid, 1342 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 1282 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-15 14:39:47,170 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [507 Valid, 1195 Invalid, 1342 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 1282 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-15 14:39:47,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2984 states. [2022-02-15 14:39:47,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2984 to 1744. [2022-02-15 14:39:47,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1744 states, 1743 states have (on average 2.919104991394148) internal successors, (5088), 1743 states have internal predecessors, (5088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:39:47,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1744 states to 1744 states and 5088 transitions. [2022-02-15 14:39:47,197 INFO L78 Accepts]: Start accepts. Automaton has 1744 states and 5088 transitions. Word has length 33 [2022-02-15 14:39:47,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:39:47,197 INFO L470 AbstractCegarLoop]: Abstraction has 1744 states and 5088 transitions. [2022-02-15 14:39:47,197 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.130434782608696) internal successors, (72), 22 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:39:47,197 INFO L276 IsEmpty]: Start isEmpty. Operand 1744 states and 5088 transitions. [2022-02-15 14:39:47,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-02-15 14:39:47,200 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:39:47,200 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:39:47,227 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-02-15 14:39:47,415 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:39:47,415 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 14:39:47,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:39:47,416 INFO L85 PathProgramCache]: Analyzing trace with hash 1508202277, now seen corresponding path program 24 times [2022-02-15 14:39:47,416 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:39:47,416 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [13351] [2022-02-15 14:39:47,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:39:47,416 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:39:47,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:39:47,629 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:39:47,629 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:39:47,629 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [13351] [2022-02-15 14:39:47,630 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [13351] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:39:47,630 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [285954146] [2022-02-15 14:39:47,630 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-15 14:39:47,630 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:39:47,630 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:39:47,631 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) [2022-02-15 14:39:47,631 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-02-15 14:39:47,662 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-02-15 14:39:47,662 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:39:47,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 25 conjunts are in the unsatisfiable core [2022-02-15 14:39:47,663 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:39:47,842 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-02-15 14:39:48,114 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:39:48,114 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:39:48,549 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:39:48,549 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [285954146] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:39:48,550 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:39:48,550 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 25 [2022-02-15 14:39:48,550 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870578656] [2022-02-15 14:39:48,550 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:39:48,550 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-15 14:39:48,550 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:39:48,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-15 14:39:48,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=539, Unknown=0, NotChecked=0, Total=650 [2022-02-15 14:39:48,551 INFO L87 Difference]: Start difference. First operand 1744 states and 5088 transitions. Second operand has 26 states, 26 states have (on average 3.3461538461538463) internal successors, (87), 25 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:39:50,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:39:50,182 INFO L93 Difference]: Finished difference Result 2872 states and 8162 transitions. [2022-02-15 14:39:50,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-02-15 14:39:50,183 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 3.3461538461538463) internal successors, (87), 25 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-02-15 14:39:50,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:39:50,187 INFO L225 Difference]: With dead ends: 2872 [2022-02-15 14:39:50,187 INFO L226 Difference]: Without dead ends: 2857 [2022-02-15 14:39:50,188 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 44 SyntacticMatches, 7 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 884 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=453, Invalid=2409, Unknown=0, NotChecked=0, Total=2862 [2022-02-15 14:39:50,188 INFO L933 BasicCegarLoop]: 116 mSDtfsCounter, 549 mSDsluCounter, 2083 mSDsCounter, 0 mSdLazyCounter, 1537 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 549 SdHoareTripleChecker+Valid, 1434 SdHoareTripleChecker+Invalid, 1602 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 1537 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-15 14:39:50,188 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [549 Valid, 1434 Invalid, 1602 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 1537 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-15 14:39:50,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2857 states. [2022-02-15 14:39:50,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2857 to 1765. [2022-02-15 14:39:50,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1765 states, 1764 states have (on average 2.9280045351473922) internal successors, (5165), 1764 states have internal predecessors, (5165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:39:50,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1765 states to 1765 states and 5165 transitions. [2022-02-15 14:39:50,210 INFO L78 Accepts]: Start accepts. Automaton has 1765 states and 5165 transitions. Word has length 33 [2022-02-15 14:39:50,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:39:50,210 INFO L470 AbstractCegarLoop]: Abstraction has 1765 states and 5165 transitions. [2022-02-15 14:39:50,210 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 3.3461538461538463) internal successors, (87), 25 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:39:50,210 INFO L276 IsEmpty]: Start isEmpty. Operand 1765 states and 5165 transitions. [2022-02-15 14:39:50,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-02-15 14:39:50,212 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:39:50,212 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:39:50,228 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2022-02-15 14:39:50,413 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-02-15 14:39:50,413 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 14:39:50,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:39:50,413 INFO L85 PathProgramCache]: Analyzing trace with hash -158196309, now seen corresponding path program 25 times [2022-02-15 14:39:50,413 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:39:50,413 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2972292] [2022-02-15 14:39:50,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:39:50,413 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:39:50,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:39:50,597 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:39:50,597 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:39:50,597 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2972292] [2022-02-15 14:39:50,597 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2972292] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:39:50,597 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1260198357] [2022-02-15 14:39:50,597 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-15 14:39:50,597 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:39:50,597 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:39:50,598 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) [2022-02-15 14:39:50,599 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-02-15 14:39:50,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:39:50,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-15 14:39:50,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:39:50,957 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:39:50,957 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:39:51,375 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:39:51,375 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1260198357] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:39:51,375 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:39:51,375 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 22 [2022-02-15 14:39:51,375 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [754939369] [2022-02-15 14:39:51,375 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:39:51,375 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-02-15 14:39:51,375 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:39:51,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-02-15 14:39:51,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=422, Unknown=0, NotChecked=0, Total=506 [2022-02-15 14:39:51,376 INFO L87 Difference]: Start difference. First operand 1765 states and 5165 transitions. Second operand has 23 states, 23 states have (on average 3.1739130434782608) internal successors, (73), 22 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:39:52,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:39:52,367 INFO L93 Difference]: Finished difference Result 3246 states and 9268 transitions. [2022-02-15 14:39:52,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-02-15 14:39:52,367 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.1739130434782608) internal successors, (73), 22 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-02-15 14:39:52,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:39:52,372 INFO L225 Difference]: With dead ends: 3246 [2022-02-15 14:39:52,372 INFO L226 Difference]: Without dead ends: 3231 [2022-02-15 14:39:52,373 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 48 SyntacticMatches, 6 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 520 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=287, Invalid=1519, Unknown=0, NotChecked=0, Total=1806 [2022-02-15 14:39:52,373 INFO L933 BasicCegarLoop]: 125 mSDtfsCounter, 409 mSDsluCounter, 1573 mSDsCounter, 0 mSdLazyCounter, 1135 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 409 SdHoareTripleChecker+Valid, 1124 SdHoareTripleChecker+Invalid, 1177 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 1135 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-15 14:39:52,373 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [409 Valid, 1124 Invalid, 1177 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 1135 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-15 14:39:52,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3231 states. [2022-02-15 14:39:52,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3231 to 1702. [2022-02-15 14:39:52,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1702 states, 1701 states have (on average 2.9253380364491477) internal successors, (4976), 1701 states have internal predecessors, (4976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:39:52,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1702 states to 1702 states and 4976 transitions. [2022-02-15 14:39:52,397 INFO L78 Accepts]: Start accepts. Automaton has 1702 states and 4976 transitions. Word has length 33 [2022-02-15 14:39:52,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:39:52,397 INFO L470 AbstractCegarLoop]: Abstraction has 1702 states and 4976 transitions. [2022-02-15 14:39:52,397 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.1739130434782608) internal successors, (73), 22 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:39:52,397 INFO L276 IsEmpty]: Start isEmpty. Operand 1702 states and 4976 transitions. [2022-02-15 14:39:52,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-02-15 14:39:52,399 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:39:52,399 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:39:52,414 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2022-02-15 14:39:52,600 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-02-15 14:39:52,600 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 14:39:52,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:39:52,600 INFO L85 PathProgramCache]: Analyzing trace with hash 758312315, now seen corresponding path program 26 times [2022-02-15 14:39:52,600 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:39:52,600 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [454827835] [2022-02-15 14:39:52,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:39:52,601 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:39:52,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:39:52,845 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:39:52,845 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:39:52,845 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [454827835] [2022-02-15 14:39:52,845 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [454827835] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:39:52,845 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1501853828] [2022-02-15 14:39:52,845 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-15 14:39:52,845 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:39:52,845 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:39:52,846 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) [2022-02-15 14:39:52,847 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-02-15 14:39:52,872 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-15 14:39:52,872 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:39:52,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 25 conjunts are in the unsatisfiable core [2022-02-15 14:39:52,873 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:39:53,140 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-02-15 14:39:53,287 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:39:53,287 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:39:53,765 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:39:53,765 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1501853828] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:39:53,765 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:39:53,765 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-02-15 14:39:53,765 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497823821] [2022-02-15 14:39:53,765 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:39:53,766 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-15 14:39:53,766 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:39:53,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-15 14:39:53,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=553, Unknown=0, NotChecked=0, Total=650 [2022-02-15 14:39:53,766 INFO L87 Difference]: Start difference. First operand 1702 states and 4976 transitions. Second operand has 26 states, 26 states have (on average 2.923076923076923) internal successors, (76), 25 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) [2022-02-15 14:39:54,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:39:54,884 INFO L93 Difference]: Finished difference Result 3477 states and 9924 transitions. [2022-02-15 14:39:54,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-02-15 14:39:54,884 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.923076923076923) internal successors, (76), 25 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-02-15 14:39:54,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:39:54,889 INFO L225 Difference]: With dead ends: 3477 [2022-02-15 14:39:54,890 INFO L226 Difference]: Without dead ends: 3462 [2022-02-15 14:39:54,890 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 46 SyntacticMatches, 5 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 477 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=261, Invalid=1631, Unknown=0, NotChecked=0, Total=1892 [2022-02-15 14:39:54,891 INFO L933 BasicCegarLoop]: 130 mSDtfsCounter, 407 mSDsluCounter, 1968 mSDsCounter, 0 mSdLazyCounter, 1448 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 407 SdHoareTripleChecker+Valid, 1353 SdHoareTripleChecker+Invalid, 1491 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 1448 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-15 14:39:54,891 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [407 Valid, 1353 Invalid, 1491 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 1448 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-15 14:39:54,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3462 states. [2022-02-15 14:39:54,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3462 to 1726. [2022-02-15 14:39:54,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1726 states, 1725 states have (on average 2.926376811594203) internal successors, (5048), 1725 states have internal predecessors, (5048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:39:54,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1726 states to 1726 states and 5048 transitions. [2022-02-15 14:39:54,919 INFO L78 Accepts]: Start accepts. Automaton has 1726 states and 5048 transitions. Word has length 33 [2022-02-15 14:39:54,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:39:54,919 INFO L470 AbstractCegarLoop]: Abstraction has 1726 states and 5048 transitions. [2022-02-15 14:39:54,919 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.923076923076923) internal successors, (76), 25 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) [2022-02-15 14:39:54,919 INFO L276 IsEmpty]: Start isEmpty. Operand 1726 states and 5048 transitions. [2022-02-15 14:39:54,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-02-15 14:39:54,921 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:39:54,921 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:39:54,938 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-02-15 14:39:55,135 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-02-15 14:39:55,135 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 14:39:55,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:39:55,136 INFO L85 PathProgramCache]: Analyzing trace with hash -10419781, now seen corresponding path program 27 times [2022-02-15 14:39:55,136 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:39:55,136 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1959182053] [2022-02-15 14:39:55,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:39:55,136 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:39:55,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:39:55,362 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:39:55,362 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:39:55,362 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1959182053] [2022-02-15 14:39:55,362 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1959182053] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:39:55,362 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2117920460] [2022-02-15 14:39:55,363 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-15 14:39:55,363 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:39:55,363 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:39:55,364 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) [2022-02-15 14:39:55,367 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-02-15 14:39:55,390 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-02-15 14:39:55,390 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:39:55,391 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 25 conjunts are in the unsatisfiable core [2022-02-15 14:39:55,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:39:55,587 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-02-15 14:39:55,807 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:39:55,807 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:39:56,267 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:39:56,268 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2117920460] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:39:56,268 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:39:56,268 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-02-15 14:39:56,268 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066110987] [2022-02-15 14:39:56,268 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:39:56,268 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-15 14:39:56,268 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:39:56,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-15 14:39:56,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=511, Unknown=0, NotChecked=0, Total=600 [2022-02-15 14:39:56,269 INFO L87 Difference]: Start difference. First operand 1726 states and 5048 transitions. Second operand has 25 states, 25 states have (on average 2.88) internal successors, (72), 24 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:39:57,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:39:57,521 INFO L93 Difference]: Finished difference Result 3304 states and 9446 transitions. [2022-02-15 14:39:57,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-02-15 14:39:57,522 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.88) internal successors, (72), 24 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-02-15 14:39:57,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:39:57,526 INFO L225 Difference]: With dead ends: 3304 [2022-02-15 14:39:57,526 INFO L226 Difference]: Without dead ends: 3285 [2022-02-15 14:39:57,527 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 45 SyntacticMatches, 7 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 504 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=254, Invalid=1638, Unknown=0, NotChecked=0, Total=1892 [2022-02-15 14:39:57,527 INFO L933 BasicCegarLoop]: 130 mSDtfsCounter, 384 mSDsluCounter, 2158 mSDsCounter, 0 mSdLazyCounter, 1588 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 384 SdHoareTripleChecker+Valid, 1522 SdHoareTripleChecker+Invalid, 1645 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 1588 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-15 14:39:57,527 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [384 Valid, 1522 Invalid, 1645 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 1588 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-15 14:39:57,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3285 states. [2022-02-15 14:39:57,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3285 to 1738. [2022-02-15 14:39:57,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1738 states, 1737 states have (on average 2.9280368451352907) internal successors, (5086), 1737 states have internal predecessors, (5086), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:39:57,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1738 states to 1738 states and 5086 transitions. [2022-02-15 14:39:57,552 INFO L78 Accepts]: Start accepts. Automaton has 1738 states and 5086 transitions. Word has length 33 [2022-02-15 14:39:57,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:39:57,552 INFO L470 AbstractCegarLoop]: Abstraction has 1738 states and 5086 transitions. [2022-02-15 14:39:57,552 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.88) internal successors, (72), 24 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:39:57,552 INFO L276 IsEmpty]: Start isEmpty. Operand 1738 states and 5086 transitions. [2022-02-15 14:39:57,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-02-15 14:39:57,555 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:39:57,555 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:39:57,570 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2022-02-15 14:39:57,756 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:39:57,756 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 14:39:57,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:39:57,756 INFO L85 PathProgramCache]: Analyzing trace with hash 865762683, now seen corresponding path program 28 times [2022-02-15 14:39:57,756 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:39:57,756 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1765826643] [2022-02-15 14:39:57,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:39:57,756 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:39:57,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:39:57,956 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:39:57,956 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:39:57,956 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1765826643] [2022-02-15 14:39:57,956 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1765826643] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:39:57,956 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1906079466] [2022-02-15 14:39:57,956 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-15 14:39:57,956 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:39:57,956 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:39:57,957 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) [2022-02-15 14:39:57,958 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-02-15 14:39:57,980 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-15 14:39:57,981 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:39:57,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-15 14:39:57,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:39:58,352 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:39:58,353 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:39:58,757 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:39:58,757 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1906079466] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:39:58,757 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:39:58,757 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-02-15 14:39:58,758 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1019458381] [2022-02-15 14:39:58,758 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:39:58,758 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-15 14:39:58,758 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:39:58,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-15 14:39:58,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=602, Unknown=0, NotChecked=0, Total=702 [2022-02-15 14:39:58,758 INFO L87 Difference]: Start difference. First operand 1738 states and 5086 transitions. Second operand has 27 states, 27 states have (on average 3.0) internal successors, (81), 26 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:40:00,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:40:00,120 INFO L93 Difference]: Finished difference Result 2959 states and 8420 transitions. [2022-02-15 14:40:00,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-02-15 14:40:00,120 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 3.0) internal successors, (81), 26 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-02-15 14:40:00,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:40:00,124 INFO L225 Difference]: With dead ends: 2959 [2022-02-15 14:40:00,124 INFO L226 Difference]: Without dead ends: 2944 [2022-02-15 14:40:00,125 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 46 SyntacticMatches, 4 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 656 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=331, Invalid=2021, Unknown=0, NotChecked=0, Total=2352 [2022-02-15 14:40:00,125 INFO L933 BasicCegarLoop]: 135 mSDtfsCounter, 453 mSDsluCounter, 2195 mSDsCounter, 0 mSdLazyCounter, 1652 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 453 SdHoareTripleChecker+Valid, 1533 SdHoareTripleChecker+Invalid, 1716 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 1652 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-15 14:40:00,125 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [453 Valid, 1533 Invalid, 1716 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 1652 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-15 14:40:00,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2944 states. [2022-02-15 14:40:00,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2944 to 1734. [2022-02-15 14:40:00,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1734 states, 1733 states have (on average 2.9267166762839008) internal successors, (5072), 1733 states have internal predecessors, (5072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:40:00,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1734 states to 1734 states and 5072 transitions. [2022-02-15 14:40:00,153 INFO L78 Accepts]: Start accepts. Automaton has 1734 states and 5072 transitions. Word has length 33 [2022-02-15 14:40:00,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:40:00,153 INFO L470 AbstractCegarLoop]: Abstraction has 1734 states and 5072 transitions. [2022-02-15 14:40:00,153 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 3.0) internal successors, (81), 26 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:40:00,153 INFO L276 IsEmpty]: Start isEmpty. Operand 1734 states and 5072 transitions. [2022-02-15 14:40:00,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-02-15 14:40:00,156 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:40:00,156 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:40:00,173 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-02-15 14:40:00,361 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:40:00,361 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 14:40:00,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:40:00,361 INFO L85 PathProgramCache]: Analyzing trace with hash 131295359, now seen corresponding path program 29 times [2022-02-15 14:40:00,361 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:40:00,361 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1945865278] [2022-02-15 14:40:00,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:40:00,361 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:40:00,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:40:00,581 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:40:00,581 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:40:00,581 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1945865278] [2022-02-15 14:40:00,581 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1945865278] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:40:00,582 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [780412558] [2022-02-15 14:40:00,582 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-15 14:40:00,582 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:40:00,582 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:40:00,583 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) [2022-02-15 14:40:00,583 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-02-15 14:40:00,606 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-15 14:40:00,606 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:40:00,607 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-15 14:40:00,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:40:00,958 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:40:00,958 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:40:01,350 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:40:01,350 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [780412558] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:40:01,350 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:40:01,350 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 27 [2022-02-15 14:40:01,351 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695546844] [2022-02-15 14:40:01,351 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:40:01,351 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-02-15 14:40:01,351 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:40:01,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-02-15 14:40:01,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=644, Unknown=0, NotChecked=0, Total=756 [2022-02-15 14:40:01,351 INFO L87 Difference]: Start difference. First operand 1734 states and 5072 transitions. Second operand has 28 states, 28 states have (on average 2.9642857142857144) internal successors, (83), 27 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:40:02,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:40:02,664 INFO L93 Difference]: Finished difference Result 3396 states and 9730 transitions. [2022-02-15 14:40:02,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-02-15 14:40:02,665 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.9642857142857144) internal successors, (83), 27 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-02-15 14:40:02,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:40:02,670 INFO L225 Difference]: With dead ends: 3396 [2022-02-15 14:40:02,670 INFO L226 Difference]: Without dead ends: 3381 [2022-02-15 14:40:02,670 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 46 SyntacticMatches, 3 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 732 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=354, Invalid=2196, Unknown=0, NotChecked=0, Total=2550 [2022-02-15 14:40:02,671 INFO L933 BasicCegarLoop]: 142 mSDtfsCounter, 532 mSDsluCounter, 2394 mSDsCounter, 0 mSdLazyCounter, 1750 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 532 SdHoareTripleChecker+Valid, 1675 SdHoareTripleChecker+Invalid, 1807 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 1750 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-15 14:40:02,671 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [532 Valid, 1675 Invalid, 1807 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 1750 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-15 14:40:02,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3381 states. [2022-02-15 14:40:02,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3381 to 1730. [2022-02-15 14:40:02,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1730 states, 1729 states have (on average 2.926547137073453) internal successors, (5060), 1729 states have internal predecessors, (5060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:40:02,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1730 states to 1730 states and 5060 transitions. [2022-02-15 14:40:02,696 INFO L78 Accepts]: Start accepts. Automaton has 1730 states and 5060 transitions. Word has length 33 [2022-02-15 14:40:02,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:40:02,696 INFO L470 AbstractCegarLoop]: Abstraction has 1730 states and 5060 transitions. [2022-02-15 14:40:02,696 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.9642857142857144) internal successors, (83), 27 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:40:02,696 INFO L276 IsEmpty]: Start isEmpty. Operand 1730 states and 5060 transitions. [2022-02-15 14:40:02,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-02-15 14:40:02,698 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:40:02,698 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:40:02,713 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-02-15 14:40:02,899 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:40:02,900 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 14:40:02,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:40:02,900 INFO L85 PathProgramCache]: Analyzing trace with hash -1151852101, now seen corresponding path program 30 times [2022-02-15 14:40:02,900 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:40:02,900 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1715362372] [2022-02-15 14:40:02,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:40:02,900 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:40:02,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:40:03,152 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:40:03,153 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:40:03,153 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1715362372] [2022-02-15 14:40:03,153 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1715362372] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:40:03,153 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1056551679] [2022-02-15 14:40:03,153 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-15 14:40:03,153 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:40:03,153 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:40:03,154 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) [2022-02-15 14:40:03,154 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-02-15 14:40:03,178 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-02-15 14:40:03,178 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:40:03,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 25 conjunts are in the unsatisfiable core [2022-02-15 14:40:03,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:40:03,373 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-02-15 14:40:03,596 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:40:03,596 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:40:04,108 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:40:04,108 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1056551679] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:40:04,108 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:40:04,108 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-02-15 14:40:04,108 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664681770] [2022-02-15 14:40:04,108 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:40:04,109 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-15 14:40:04,109 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:40:04,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-15 14:40:04,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=551, Unknown=0, NotChecked=0, Total=650 [2022-02-15 14:40:04,109 INFO L87 Difference]: Start difference. First operand 1730 states and 5060 transitions. Second operand has 26 states, 26 states have (on average 2.8461538461538463) internal successors, (74), 25 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) [2022-02-15 14:40:05,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:40:05,536 INFO L93 Difference]: Finished difference Result 3775 states and 10681 transitions. [2022-02-15 14:40:05,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-02-15 14:40:05,537 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.8461538461538463) internal successors, (74), 25 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-02-15 14:40:05,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:40:05,542 INFO L225 Difference]: With dead ends: 3775 [2022-02-15 14:40:05,542 INFO L226 Difference]: Without dead ends: 3760 [2022-02-15 14:40:05,542 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 45 SyntacticMatches, 6 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 594 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=310, Invalid=1946, Unknown=0, NotChecked=0, Total=2256 [2022-02-15 14:40:05,543 INFO L933 BasicCegarLoop]: 134 mSDtfsCounter, 473 mSDsluCounter, 2420 mSDsCounter, 0 mSdLazyCounter, 1774 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 473 SdHoareTripleChecker+Valid, 1644 SdHoareTripleChecker+Invalid, 1830 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 1774 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-15 14:40:05,543 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [473 Valid, 1644 Invalid, 1830 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 1774 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-15 14:40:05,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3760 states. [2022-02-15 14:40:05,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3760 to 1710. [2022-02-15 14:40:05,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1710 states, 1709 states have (on average 2.925687536571094) internal successors, (5000), 1709 states have internal predecessors, (5000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:40:05,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1710 states to 1710 states and 5000 transitions. [2022-02-15 14:40:05,569 INFO L78 Accepts]: Start accepts. Automaton has 1710 states and 5000 transitions. Word has length 33 [2022-02-15 14:40:05,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:40:05,569 INFO L470 AbstractCegarLoop]: Abstraction has 1710 states and 5000 transitions. [2022-02-15 14:40:05,570 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.8461538461538463) internal successors, (74), 25 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) [2022-02-15 14:40:05,570 INFO L276 IsEmpty]: Start isEmpty. Operand 1710 states and 5000 transitions. [2022-02-15 14:40:05,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-02-15 14:40:05,572 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:40:05,572 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:40:05,591 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2022-02-15 14:40:05,788 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2022-02-15 14:40:05,788 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 14:40:05,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:40:05,788 INFO L85 PathProgramCache]: Analyzing trace with hash 1721940609, now seen corresponding path program 31 times [2022-02-15 14:40:05,788 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:40:05,788 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1962824531] [2022-02-15 14:40:05,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:40:05,789 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:40:05,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:40:06,008 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:40:06,009 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:40:06,009 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1962824531] [2022-02-15 14:40:06,009 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1962824531] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:40:06,009 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1774984505] [2022-02-15 14:40:06,009 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-15 14:40:06,009 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:40:06,009 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:40:06,010 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) [2022-02-15 14:40:06,011 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-02-15 14:40:06,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:40:06,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-15 14:40:06,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:40:06,411 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:40:06,411 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:40:06,768 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:40:06,769 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1774984505] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:40:06,769 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:40:06,769 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-02-15 14:40:06,769 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [949244017] [2022-02-15 14:40:06,769 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:40:06,769 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-15 14:40:06,769 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:40:06,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-15 14:40:06,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=594, Unknown=0, NotChecked=0, Total=702 [2022-02-15 14:40:06,770 INFO L87 Difference]: Start difference. First operand 1710 states and 5000 transitions. Second operand has 27 states, 27 states have (on average 3.037037037037037) internal successors, (82), 26 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:40:08,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:40:08,046 INFO L93 Difference]: Finished difference Result 3763 states and 10685 transitions. [2022-02-15 14:40:08,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-02-15 14:40:08,046 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 3.037037037037037) internal successors, (82), 26 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-02-15 14:40:08,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:40:08,052 INFO L225 Difference]: With dead ends: 3763 [2022-02-15 14:40:08,052 INFO L226 Difference]: Without dead ends: 3748 [2022-02-15 14:40:08,052 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 46 SyntacticMatches, 4 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 617 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=310, Invalid=1852, Unknown=0, NotChecked=0, Total=2162 [2022-02-15 14:40:08,053 INFO L933 BasicCegarLoop]: 144 mSDtfsCounter, 361 mSDsluCounter, 2804 mSDsCounter, 0 mSdLazyCounter, 1938 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 361 SdHoareTripleChecker+Valid, 1906 SdHoareTripleChecker+Invalid, 1971 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 1938 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-15 14:40:08,053 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [361 Valid, 1906 Invalid, 1971 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 1938 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-15 14:40:08,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3748 states. [2022-02-15 14:40:08,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3748 to 1731. [2022-02-15 14:40:08,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1731 states, 1730 states have (on average 2.921387283236994) internal successors, (5054), 1730 states have internal predecessors, (5054), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:40:08,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1731 states to 1731 states and 5054 transitions. [2022-02-15 14:40:08,079 INFO L78 Accepts]: Start accepts. Automaton has 1731 states and 5054 transitions. Word has length 33 [2022-02-15 14:40:08,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:40:08,079 INFO L470 AbstractCegarLoop]: Abstraction has 1731 states and 5054 transitions. [2022-02-15 14:40:08,079 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 3.037037037037037) internal successors, (82), 26 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:40:08,079 INFO L276 IsEmpty]: Start isEmpty. Operand 1731 states and 5054 transitions. [2022-02-15 14:40:08,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-02-15 14:40:08,081 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:40:08,081 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:40:08,096 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2022-02-15 14:40:08,281 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:40:08,282 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 14:40:08,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:40:08,282 INFO L85 PathProgramCache]: Analyzing trace with hash -485112675, now seen corresponding path program 32 times [2022-02-15 14:40:08,282 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:40:08,282 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [531562874] [2022-02-15 14:40:08,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:40:08,282 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:40:08,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:40:08,482 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:40:08,483 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:40:08,483 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [531562874] [2022-02-15 14:40:08,483 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [531562874] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:40:08,483 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1648393950] [2022-02-15 14:40:08,483 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-15 14:40:08,483 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:40:08,483 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:40:08,484 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) [2022-02-15 14:40:08,484 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-02-15 14:40:08,508 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-15 14:40:08,508 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:40:08,509 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 25 conjunts are in the unsatisfiable core [2022-02-15 14:40:08,509 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:40:08,774 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 5 treesize of output 3 [2022-02-15 14:40:08,932 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:40:08,932 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:40:09,405 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:40:09,406 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1648393950] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:40:09,406 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:40:09,406 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-02-15 14:40:09,406 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201536312] [2022-02-15 14:40:09,406 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:40:09,406 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-15 14:40:09,406 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:40:09,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-15 14:40:09,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=505, Unknown=0, NotChecked=0, Total=600 [2022-02-15 14:40:09,407 INFO L87 Difference]: Start difference. First operand 1731 states and 5054 transitions. Second operand has 25 states, 25 states have (on average 2.92) internal successors, (73), 24 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:40:10,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:40:10,543 INFO L93 Difference]: Finished difference Result 3664 states and 10402 transitions. [2022-02-15 14:40:10,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-02-15 14:40:10,543 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.92) internal successors, (73), 24 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-02-15 14:40:10,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:40:10,549 INFO L225 Difference]: With dead ends: 3664 [2022-02-15 14:40:10,549 INFO L226 Difference]: Without dead ends: 3649 [2022-02-15 14:40:10,549 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 46 SyntacticMatches, 6 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 392 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=251, Invalid=1389, Unknown=0, NotChecked=0, Total=1640 [2022-02-15 14:40:10,550 INFO L933 BasicCegarLoop]: 132 mSDtfsCounter, 340 mSDsluCounter, 2479 mSDsCounter, 0 mSdLazyCounter, 1771 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 340 SdHoareTripleChecker+Valid, 1674 SdHoareTripleChecker+Invalid, 1796 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 1771 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-15 14:40:10,550 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [340 Valid, 1674 Invalid, 1796 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 1771 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-15 14:40:10,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3649 states. [2022-02-15 14:40:10,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3649 to 1768. [2022-02-15 14:40:10,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1768 states, 1767 states have (on average 2.9134125636672326) internal successors, (5148), 1767 states have internal predecessors, (5148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:40:10,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1768 states to 1768 states and 5148 transitions. [2022-02-15 14:40:10,583 INFO L78 Accepts]: Start accepts. Automaton has 1768 states and 5148 transitions. Word has length 33 [2022-02-15 14:40:10,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:40:10,583 INFO L470 AbstractCegarLoop]: Abstraction has 1768 states and 5148 transitions. [2022-02-15 14:40:10,583 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.92) internal successors, (73), 24 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:40:10,583 INFO L276 IsEmpty]: Start isEmpty. Operand 1768 states and 5148 transitions. [2022-02-15 14:40:10,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-02-15 14:40:10,585 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:40:10,585 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:40:10,600 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2022-02-15 14:40:10,785 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:40:10,786 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 14:40:10,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:40:10,786 INFO L85 PathProgramCache]: Analyzing trace with hash 68792961, now seen corresponding path program 33 times [2022-02-15 14:40:10,786 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:40:10,786 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1544462664] [2022-02-15 14:40:10,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:40:10,787 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:40:10,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:40:10,982 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:40:10,982 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:40:10,982 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1544462664] [2022-02-15 14:40:10,982 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1544462664] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:40:10,982 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1285416485] [2022-02-15 14:40:10,982 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-15 14:40:10,982 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:40:10,982 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:40:10,983 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) [2022-02-15 14:40:10,984 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-02-15 14:40:11,006 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-02-15 14:40:11,007 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:40:11,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 25 conjunts are in the unsatisfiable core [2022-02-15 14:40:11,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:40:11,274 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-02-15 14:40:11,480 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:40:11,480 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:40:11,988 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:40:11,988 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1285416485] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:40:11,988 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:40:11,988 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-02-15 14:40:11,988 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [536579580] [2022-02-15 14:40:11,988 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:40:11,989 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-15 14:40:11,989 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:40:11,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-15 14:40:11,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=553, Unknown=0, NotChecked=0, Total=650 [2022-02-15 14:40:11,989 INFO L87 Difference]: Start difference. First operand 1768 states and 5148 transitions. Second operand has 26 states, 26 states have (on average 2.9615384615384617) internal successors, (77), 25 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:40:13,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:40:13,041 INFO L93 Difference]: Finished difference Result 3390 states and 9689 transitions. [2022-02-15 14:40:13,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-02-15 14:40:13,041 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.9615384615384617) internal successors, (77), 25 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-02-15 14:40:13,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:40:13,046 INFO L225 Difference]: With dead ends: 3390 [2022-02-15 14:40:13,046 INFO L226 Difference]: Without dead ends: 3375 [2022-02-15 14:40:13,046 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 46 SyntacticMatches, 5 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 401 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=240, Invalid=1400, Unknown=0, NotChecked=0, Total=1640 [2022-02-15 14:40:13,047 INFO L933 BasicCegarLoop]: 115 mSDtfsCounter, 373 mSDsluCounter, 2104 mSDsCounter, 0 mSdLazyCounter, 1522 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 373 SdHoareTripleChecker+Valid, 1420 SdHoareTripleChecker+Invalid, 1554 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 1522 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-15 14:40:13,047 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [373 Valid, 1420 Invalid, 1554 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 1522 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-15 14:40:13,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3375 states. [2022-02-15 14:40:13,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3375 to 1852. [2022-02-15 14:40:13,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1852 states, 1851 states have (on average 2.902215018908698) internal successors, (5372), 1851 states have internal predecessors, (5372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:40:13,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1852 states to 1852 states and 5372 transitions. [2022-02-15 14:40:13,074 INFO L78 Accepts]: Start accepts. Automaton has 1852 states and 5372 transitions. Word has length 33 [2022-02-15 14:40:13,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:40:13,074 INFO L470 AbstractCegarLoop]: Abstraction has 1852 states and 5372 transitions. [2022-02-15 14:40:13,075 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.9615384615384617) internal successors, (77), 25 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:40:13,075 INFO L276 IsEmpty]: Start isEmpty. Operand 1852 states and 5372 transitions. [2022-02-15 14:40:13,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-02-15 14:40:13,077 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:40:13,077 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:40:13,094 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2022-02-15 14:40:13,279 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2022-02-15 14:40:13,279 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 14:40:13,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:40:13,280 INFO L85 PathProgramCache]: Analyzing trace with hash 226317897, now seen corresponding path program 34 times [2022-02-15 14:40:13,280 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:40:13,280 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1609193813] [2022-02-15 14:40:13,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:40:13,280 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:40:13,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:40:13,484 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:40:13,484 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:40:13,484 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1609193813] [2022-02-15 14:40:13,484 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1609193813] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:40:13,484 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1416235069] [2022-02-15 14:40:13,484 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-15 14:40:13,484 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:40:13,485 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:40:13,485 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) [2022-02-15 14:40:13,486 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-02-15 14:40:13,509 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-15 14:40:13,509 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:40:13,510 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-15 14:40:13,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:40:13,917 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:40:13,917 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:40:14,320 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:40:14,320 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1416235069] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:40:14,320 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:40:14,320 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-02-15 14:40:14,320 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [397445166] [2022-02-15 14:40:14,320 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:40:14,320 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-15 14:40:14,321 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:40:14,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-15 14:40:14,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=602, Unknown=0, NotChecked=0, Total=702 [2022-02-15 14:40:14,321 INFO L87 Difference]: Start difference. First operand 1852 states and 5372 transitions. Second operand has 27 states, 27 states have (on average 3.0) internal successors, (81), 26 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:40:15,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:40:15,630 INFO L93 Difference]: Finished difference Result 3075 states and 8701 transitions. [2022-02-15 14:40:15,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-02-15 14:40:15,630 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 3.0) internal successors, (81), 26 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-02-15 14:40:15,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:40:15,635 INFO L225 Difference]: With dead ends: 3075 [2022-02-15 14:40:15,635 INFO L226 Difference]: Without dead ends: 3060 [2022-02-15 14:40:15,635 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 46 SyntacticMatches, 5 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 605 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=313, Invalid=1849, Unknown=0, NotChecked=0, Total=2162 [2022-02-15 14:40:15,635 INFO L933 BasicCegarLoop]: 124 mSDtfsCounter, 370 mSDsluCounter, 2724 mSDsCounter, 0 mSdLazyCounter, 1660 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 370 SdHoareTripleChecker+Valid, 1806 SdHoareTripleChecker+Invalid, 1998 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 1660 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 287 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-15 14:40:15,635 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [370 Valid, 1806 Invalid, 1998 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 1660 Invalid, 0 Unknown, 287 Unchecked, 0.6s Time] [2022-02-15 14:40:15,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3060 states. [2022-02-15 14:40:15,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3060 to 1915. [2022-02-15 14:40:15,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1915 states, 1914 states have (on average 2.9054336468129573) internal successors, (5561), 1914 states have internal predecessors, (5561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:40:15,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1915 states to 1915 states and 5561 transitions. [2022-02-15 14:40:15,662 INFO L78 Accepts]: Start accepts. Automaton has 1915 states and 5561 transitions. Word has length 33 [2022-02-15 14:40:15,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:40:15,662 INFO L470 AbstractCegarLoop]: Abstraction has 1915 states and 5561 transitions. [2022-02-15 14:40:15,663 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 3.0) internal successors, (81), 26 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:40:15,663 INFO L276 IsEmpty]: Start isEmpty. Operand 1915 states and 5561 transitions. [2022-02-15 14:40:15,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-02-15 14:40:15,665 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:40:15,665 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:40:15,680 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2022-02-15 14:40:15,865 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2022-02-15 14:40:15,866 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 14:40:15,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:40:15,866 INFO L85 PathProgramCache]: Analyzing trace with hash -2440947, now seen corresponding path program 35 times [2022-02-15 14:40:15,866 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:40:15,866 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [738115005] [2022-02-15 14:40:15,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:40:15,866 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:40:15,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:40:16,077 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:40:16,077 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:40:16,077 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [738115005] [2022-02-15 14:40:16,077 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [738115005] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:40:16,077 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1928193529] [2022-02-15 14:40:16,077 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-15 14:40:16,077 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:40:16,077 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:40:16,078 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) [2022-02-15 14:40:16,079 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-02-15 14:40:16,104 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-15 14:40:16,104 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:40:16,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-15 14:40:16,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:40:16,486 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:40:16,486 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:40:16,850 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:40:16,850 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1928193529] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:40:16,850 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:40:16,850 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-02-15 14:40:16,850 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1484896660] [2022-02-15 14:40:16,850 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:40:16,850 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-15 14:40:16,850 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:40:16,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-15 14:40:16,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=602, Unknown=0, NotChecked=0, Total=702 [2022-02-15 14:40:16,851 INFO L87 Difference]: Start difference. First operand 1915 states and 5561 transitions. Second operand has 27 states, 27 states have (on average 3.0) internal successors, (81), 26 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:40:17,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:40:17,843 INFO L93 Difference]: Finished difference Result 3354 states and 9559 transitions. [2022-02-15 14:40:17,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-02-15 14:40:17,843 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 3.0) internal successors, (81), 26 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-02-15 14:40:17,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:40:17,848 INFO L225 Difference]: With dead ends: 3354 [2022-02-15 14:40:17,848 INFO L226 Difference]: Without dead ends: 3339 [2022-02-15 14:40:17,848 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 47 SyntacticMatches, 3 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 552 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=272, Invalid=1708, Unknown=0, NotChecked=0, Total=1980 [2022-02-15 14:40:17,849 INFO L933 BasicCegarLoop]: 121 mSDtfsCounter, 418 mSDsluCounter, 1692 mSDsCounter, 0 mSdLazyCounter, 1199 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 418 SdHoareTripleChecker+Valid, 1184 SdHoareTripleChecker+Invalid, 1248 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 1199 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-15 14:40:17,849 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [418 Valid, 1184 Invalid, 1248 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 1199 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-15 14:40:17,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3339 states. [2022-02-15 14:40:17,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3339 to 1894. [2022-02-15 14:40:17,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1894 states, 1893 states have (on average 2.8969889064976226) internal successors, (5484), 1893 states have internal predecessors, (5484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:40:17,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1894 states to 1894 states and 5484 transitions. [2022-02-15 14:40:17,874 INFO L78 Accepts]: Start accepts. Automaton has 1894 states and 5484 transitions. Word has length 33 [2022-02-15 14:40:17,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:40:17,875 INFO L470 AbstractCegarLoop]: Abstraction has 1894 states and 5484 transitions. [2022-02-15 14:40:17,875 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 3.0) internal successors, (81), 26 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:40:17,875 INFO L276 IsEmpty]: Start isEmpty. Operand 1894 states and 5484 transitions. [2022-02-15 14:40:17,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-02-15 14:40:17,877 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:40:17,877 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:40:17,892 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2022-02-15 14:40:18,077 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2022-02-15 14:40:18,077 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 14:40:18,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:40:18,078 INFO L85 PathProgramCache]: Analyzing trace with hash -949172747, now seen corresponding path program 36 times [2022-02-15 14:40:18,078 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:40:18,078 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1923896443] [2022-02-15 14:40:18,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:40:18,078 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:40:18,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:40:18,298 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:40:18,298 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:40:18,298 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1923896443] [2022-02-15 14:40:18,298 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1923896443] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:40:18,298 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [585186824] [2022-02-15 14:40:18,298 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-15 14:40:18,299 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:40:18,299 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:40:18,300 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) [2022-02-15 14:40:18,300 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-02-15 14:40:18,323 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-02-15 14:40:18,324 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:40:18,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 25 conjunts are in the unsatisfiable core [2022-02-15 14:40:18,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:40:18,507 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-02-15 14:40:18,756 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:40:18,756 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:40:19,304 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:40:19,304 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [585186824] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:40:19,304 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:40:19,304 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-02-15 14:40:19,304 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [666278219] [2022-02-15 14:40:19,304 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:40:19,304 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-15 14:40:19,304 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:40:19,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-15 14:40:19,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=551, Unknown=0, NotChecked=0, Total=650 [2022-02-15 14:40:19,305 INFO L87 Difference]: Start difference. First operand 1894 states and 5484 transitions. Second operand has 26 states, 26 states have (on average 2.8076923076923075) internal successors, (73), 25 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:40:20,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:40:20,438 INFO L93 Difference]: Finished difference Result 3383 states and 9677 transitions. [2022-02-15 14:40:20,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-02-15 14:40:20,439 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.8076923076923075) internal successors, (73), 25 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-02-15 14:40:20,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:40:20,443 INFO L225 Difference]: With dead ends: 3383 [2022-02-15 14:40:20,444 INFO L226 Difference]: Without dead ends: 3368 [2022-02-15 14:40:20,444 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 45 SyntacticMatches, 6 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 458 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=273, Invalid=1533, Unknown=0, NotChecked=0, Total=1806 [2022-02-15 14:40:20,444 INFO L933 BasicCegarLoop]: 116 mSDtfsCounter, 398 mSDsluCounter, 2241 mSDsCounter, 0 mSdLazyCounter, 1590 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 398 SdHoareTripleChecker+Valid, 1539 SdHoareTripleChecker+Invalid, 1623 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 1590 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-15 14:40:20,444 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [398 Valid, 1539 Invalid, 1623 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 1590 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-15 14:40:20,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3368 states. [2022-02-15 14:40:20,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3368 to 1873. [2022-02-15 14:40:20,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1873 states, 1872 states have (on average 2.8995726495726495) internal successors, (5428), 1872 states have internal predecessors, (5428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:40:20,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1873 states to 1873 states and 5428 transitions. [2022-02-15 14:40:20,469 INFO L78 Accepts]: Start accepts. Automaton has 1873 states and 5428 transitions. Word has length 33 [2022-02-15 14:40:20,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:40:20,469 INFO L470 AbstractCegarLoop]: Abstraction has 1873 states and 5428 transitions. [2022-02-15 14:40:20,469 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.8076923076923075) internal successors, (73), 25 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:40:20,469 INFO L276 IsEmpty]: Start isEmpty. Operand 1873 states and 5428 transitions. [2022-02-15 14:40:20,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-02-15 14:40:20,471 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:40:20,471 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:40:20,487 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2022-02-15 14:40:20,671 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2022-02-15 14:40:20,672 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 14:40:20,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:40:20,672 INFO L85 PathProgramCache]: Analyzing trace with hash -1103610265, now seen corresponding path program 37 times [2022-02-15 14:40:20,672 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:40:20,672 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [730171076] [2022-02-15 14:40:20,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:40:20,672 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:40:20,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:40:20,909 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:40:20,910 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:40:20,910 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [730171076] [2022-02-15 14:40:20,910 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [730171076] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:40:20,910 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [791476949] [2022-02-15 14:40:20,910 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-15 14:40:20,910 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:40:20,910 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:40:20,911 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) [2022-02-15 14:40:20,912 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-02-15 14:40:20,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:40:20,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-15 14:40:20,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:40:21,395 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:40:21,395 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:40:21,795 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:40:21,796 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [791476949] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:40:21,796 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:40:21,796 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 27 [2022-02-15 14:40:21,796 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [909952438] [2022-02-15 14:40:21,796 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:40:21,796 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-02-15 14:40:21,796 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:40:21,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-02-15 14:40:21,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=644, Unknown=0, NotChecked=0, Total=756 [2022-02-15 14:40:21,797 INFO L87 Difference]: Start difference. First operand 1873 states and 5428 transitions. Second operand has 28 states, 28 states have (on average 2.9285714285714284) internal successors, (82), 27 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:40:22,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:40:22,654 INFO L93 Difference]: Finished difference Result 3522 states and 10009 transitions. [2022-02-15 14:40:22,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-02-15 14:40:22,655 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.9285714285714284) internal successors, (82), 27 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-02-15 14:40:22,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:40:22,660 INFO L225 Difference]: With dead ends: 3522 [2022-02-15 14:40:22,660 INFO L226 Difference]: Without dead ends: 3516 [2022-02-15 14:40:22,660 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 46 SyntacticMatches, 4 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 476 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=241, Invalid=1399, Unknown=0, NotChecked=0, Total=1640 [2022-02-15 14:40:22,660 INFO L933 BasicCegarLoop]: 110 mSDtfsCounter, 358 mSDsluCounter, 2012 mSDsCounter, 0 mSdLazyCounter, 1251 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 358 SdHoareTripleChecker+Valid, 1428 SdHoareTripleChecker+Invalid, 1477 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 1251 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 199 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-15 14:40:22,660 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [358 Valid, 1428 Invalid, 1477 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 1251 Invalid, 0 Unknown, 199 Unchecked, 0.5s Time] [2022-02-15 14:40:22,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3516 states. [2022-02-15 14:40:22,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3516 to 1909. [2022-02-15 14:40:22,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1909 states, 1908 states have (on average 2.903039832285115) internal successors, (5539), 1908 states have internal predecessors, (5539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:40:22,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1909 states to 1909 states and 5539 transitions. [2022-02-15 14:40:22,686 INFO L78 Accepts]: Start accepts. Automaton has 1909 states and 5539 transitions. Word has length 33 [2022-02-15 14:40:22,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:40:22,686 INFO L470 AbstractCegarLoop]: Abstraction has 1909 states and 5539 transitions. [2022-02-15 14:40:22,686 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.9285714285714284) internal successors, (82), 27 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:40:22,686 INFO L276 IsEmpty]: Start isEmpty. Operand 1909 states and 5539 transitions. [2022-02-15 14:40:22,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-02-15 14:40:22,688 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:40:22,688 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:40:22,703 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2022-02-15 14:40:22,888 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2022-02-15 14:40:22,889 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 14:40:22,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:40:22,889 INFO L85 PathProgramCache]: Analyzing trace with hash -1473614485, now seen corresponding path program 38 times [2022-02-15 14:40:22,889 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:40:22,889 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1700506034] [2022-02-15 14:40:22,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:40:22,889 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:40:22,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:40:23,091 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:40:23,091 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:40:23,091 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1700506034] [2022-02-15 14:40:23,091 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1700506034] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:40:23,091 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [367656578] [2022-02-15 14:40:23,091 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-15 14:40:23,091 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:40:23,092 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:40:23,092 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) [2022-02-15 14:40:23,093 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-02-15 14:40:23,116 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-15 14:40:23,116 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:40:23,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 25 conjunts are in the unsatisfiable core [2022-02-15 14:40:23,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:40:23,303 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 5 treesize of output 3 [2022-02-15 14:40:23,567 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:40:23,568 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:40:24,061 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:40:24,061 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [367656578] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:40:24,061 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:40:24,061 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-02-15 14:40:24,061 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1328733481] [2022-02-15 14:40:24,061 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:40:24,061 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-15 14:40:24,061 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:40:24,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-15 14:40:24,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=551, Unknown=0, NotChecked=0, Total=650 [2022-02-15 14:40:24,062 INFO L87 Difference]: Start difference. First operand 1909 states and 5539 transitions. Second operand has 26 states, 26 states have (on average 2.8076923076923075) internal successors, (73), 25 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:40:25,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:40:25,352 INFO L93 Difference]: Finished difference Result 3502 states and 9990 transitions. [2022-02-15 14:40:25,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-02-15 14:40:25,352 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.8076923076923075) internal successors, (73), 25 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-02-15 14:40:25,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:40:25,357 INFO L225 Difference]: With dead ends: 3502 [2022-02-15 14:40:25,358 INFO L226 Difference]: Without dead ends: 3487 [2022-02-15 14:40:25,358 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 46 SyntacticMatches, 5 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 428 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=255, Invalid=1467, Unknown=0, NotChecked=0, Total=1722 [2022-02-15 14:40:25,358 INFO L933 BasicCegarLoop]: 120 mSDtfsCounter, 319 mSDsluCounter, 2927 mSDsCounter, 0 mSdLazyCounter, 2112 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 319 SdHoareTripleChecker+Valid, 1943 SdHoareTripleChecker+Invalid, 2146 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 2112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-15 14:40:25,358 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [319 Valid, 1943 Invalid, 2146 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 2112 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-15 14:40:25,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3487 states. [2022-02-15 14:40:25,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3487 to 1768. [2022-02-15 14:40:25,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1768 states, 1767 states have (on average 2.9134125636672326) internal successors, (5148), 1767 states have internal predecessors, (5148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:40:25,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1768 states to 1768 states and 5148 transitions. [2022-02-15 14:40:25,383 INFO L78 Accepts]: Start accepts. Automaton has 1768 states and 5148 transitions. Word has length 33 [2022-02-15 14:40:25,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:40:25,383 INFO L470 AbstractCegarLoop]: Abstraction has 1768 states and 5148 transitions. [2022-02-15 14:40:25,383 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.8076923076923075) internal successors, (73), 25 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:40:25,383 INFO L276 IsEmpty]: Start isEmpty. Operand 1768 states and 5148 transitions. [2022-02-15 14:40:25,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-02-15 14:40:25,385 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:40:25,385 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:40:25,400 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Ended with exit code 0 [2022-02-15 14:40:25,585 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2022-02-15 14:40:25,585 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 14:40:25,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:40:25,586 INFO L85 PathProgramCache]: Analyzing trace with hash 603202051, now seen corresponding path program 39 times [2022-02-15 14:40:25,586 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:40:25,586 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1698227199] [2022-02-15 14:40:25,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:40:25,586 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:40:25,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:40:25,784 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:40:25,784 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:40:25,784 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1698227199] [2022-02-15 14:40:25,784 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1698227199] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:40:25,785 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1756076252] [2022-02-15 14:40:25,785 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-15 14:40:25,785 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:40:25,785 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:40:25,786 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) [2022-02-15 14:40:25,786 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-02-15 14:40:25,809 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-02-15 14:40:25,809 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:40:25,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 25 conjunts are in the unsatisfiable core [2022-02-15 14:40:25,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:40:26,049 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-02-15 14:40:26,177 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:40:26,177 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:40:26,621 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:40:26,622 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1756076252] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:40:26,622 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:40:26,622 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 23 [2022-02-15 14:40:26,622 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1254998608] [2022-02-15 14:40:26,622 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:40:26,622 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-02-15 14:40:26,622 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:40:26,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-02-15 14:40:26,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=459, Unknown=0, NotChecked=0, Total=552 [2022-02-15 14:40:26,623 INFO L87 Difference]: Start difference. First operand 1768 states and 5148 transitions. Second operand has 24 states, 24 states have (on average 3.1666666666666665) internal successors, (76), 23 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) [2022-02-15 14:40:27,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:40:27,652 INFO L93 Difference]: Finished difference Result 3296 states and 9482 transitions. [2022-02-15 14:40:27,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-02-15 14:40:27,652 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 3.1666666666666665) internal successors, (76), 23 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-02-15 14:40:27,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:40:27,657 INFO L225 Difference]: With dead ends: 3296 [2022-02-15 14:40:27,657 INFO L226 Difference]: Without dead ends: 3281 [2022-02-15 14:40:27,657 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 46 SyntacticMatches, 7 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 502 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=268, Invalid=1372, Unknown=0, NotChecked=0, Total=1640 [2022-02-15 14:40:27,658 INFO L933 BasicCegarLoop]: 115 mSDtfsCounter, 381 mSDsluCounter, 1894 mSDsCounter, 0 mSdLazyCounter, 1446 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 381 SdHoareTripleChecker+Valid, 1294 SdHoareTripleChecker+Invalid, 1477 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 1446 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-15 14:40:27,658 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [381 Valid, 1294 Invalid, 1477 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 1446 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-15 14:40:27,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3281 states. [2022-02-15 14:40:27,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3281 to 1844. [2022-02-15 14:40:27,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1844 states, 1843 states have (on average 2.921323928377645) internal successors, (5384), 1843 states have internal predecessors, (5384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:40:27,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1844 states to 1844 states and 5384 transitions. [2022-02-15 14:40:27,682 INFO L78 Accepts]: Start accepts. Automaton has 1844 states and 5384 transitions. Word has length 33 [2022-02-15 14:40:27,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:40:27,682 INFO L470 AbstractCegarLoop]: Abstraction has 1844 states and 5384 transitions. [2022-02-15 14:40:27,682 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 3.1666666666666665) internal successors, (76), 23 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) [2022-02-15 14:40:27,682 INFO L276 IsEmpty]: Start isEmpty. Operand 1844 states and 5384 transitions. [2022-02-15 14:40:27,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-02-15 14:40:27,684 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:40:27,684 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:40:27,699 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Ended with exit code 0 [2022-02-15 14:40:27,888 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2022-02-15 14:40:27,889 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 14:40:27,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:40:27,889 INFO L85 PathProgramCache]: Analyzing trace with hash -165530045, now seen corresponding path program 40 times [2022-02-15 14:40:27,889 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:40:27,889 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [840102743] [2022-02-15 14:40:27,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:40:27,889 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:40:27,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:40:28,083 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:40:28,083 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:40:28,083 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [840102743] [2022-02-15 14:40:28,083 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [840102743] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:40:28,083 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [916059815] [2022-02-15 14:40:28,083 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-15 14:40:28,083 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:40:28,084 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:40:28,084 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) [2022-02-15 14:40:28,085 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-02-15 14:40:28,107 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-15 14:40:28,107 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:40:28,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-15 14:40:28,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:40:28,447 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:40:28,448 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:40:28,864 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:40:28,864 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [916059815] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:40:28,864 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:40:28,864 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 25 [2022-02-15 14:40:28,864 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1080439266] [2022-02-15 14:40:28,864 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:40:28,865 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-15 14:40:28,865 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:40:28,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-15 14:40:28,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=545, Unknown=0, NotChecked=0, Total=650 [2022-02-15 14:40:28,865 INFO L87 Difference]: Start difference. First operand 1844 states and 5384 transitions. Second operand has 26 states, 26 states have (on average 3.1923076923076925) internal successors, (83), 25 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:40:30,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:40:30,020 INFO L93 Difference]: Finished difference Result 3161 states and 9104 transitions. [2022-02-15 14:40:30,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-02-15 14:40:30,021 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 3.1923076923076925) internal successors, (83), 25 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-02-15 14:40:30,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:40:30,026 INFO L225 Difference]: With dead ends: 3161 [2022-02-15 14:40:30,026 INFO L226 Difference]: Without dead ends: 3142 [2022-02-15 14:40:30,026 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 46 SyntacticMatches, 5 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 606 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=303, Invalid=1589, Unknown=0, NotChecked=0, Total=1892 [2022-02-15 14:40:30,026 INFO L933 BasicCegarLoop]: 118 mSDtfsCounter, 421 mSDsluCounter, 1727 mSDsCounter, 0 mSdLazyCounter, 1367 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 421 SdHoareTripleChecker+Valid, 1230 SdHoareTripleChecker+Invalid, 1422 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 1367 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-15 14:40:30,026 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [421 Valid, 1230 Invalid, 1422 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 1367 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-15 14:40:30,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3142 states. [2022-02-15 14:40:30,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3142 to 1856. [2022-02-15 14:40:30,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1856 states, 1855 states have (on average 2.922911051212938) internal successors, (5422), 1855 states have internal predecessors, (5422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:40:30,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1856 states to 1856 states and 5422 transitions. [2022-02-15 14:40:30,052 INFO L78 Accepts]: Start accepts. Automaton has 1856 states and 5422 transitions. Word has length 33 [2022-02-15 14:40:30,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:40:30,052 INFO L470 AbstractCegarLoop]: Abstraction has 1856 states and 5422 transitions. [2022-02-15 14:40:30,052 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 3.1923076923076925) internal successors, (83), 25 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:40:30,052 INFO L276 IsEmpty]: Start isEmpty. Operand 1856 states and 5422 transitions. [2022-02-15 14:40:30,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-02-15 14:40:30,054 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:40:30,054 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:40:30,071 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2022-02-15 14:40:30,255 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2022-02-15 14:40:30,255 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 14:40:30,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:40:30,255 INFO L85 PathProgramCache]: Analyzing trace with hash 710652419, now seen corresponding path program 41 times [2022-02-15 14:40:30,255 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:40:30,255 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1161367663] [2022-02-15 14:40:30,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:40:30,255 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:40:30,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:40:30,445 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:40:30,446 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:40:30,446 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1161367663] [2022-02-15 14:40:30,446 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1161367663] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:40:30,446 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2062475608] [2022-02-15 14:40:30,446 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-15 14:40:30,446 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:40:30,446 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:40:30,447 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) [2022-02-15 14:40:30,447 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2022-02-15 14:40:30,470 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-15 14:40:30,470 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:40:30,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-15 14:40:30,471 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:40:30,835 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:40:30,835 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:40:31,260 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:40:31,260 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2062475608] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:40:31,260 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:40:31,260 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 25 [2022-02-15 14:40:31,260 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314648845] [2022-02-15 14:40:31,260 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:40:31,260 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-15 14:40:31,260 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:40:31,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-15 14:40:31,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=545, Unknown=0, NotChecked=0, Total=650 [2022-02-15 14:40:31,261 INFO L87 Difference]: Start difference. First operand 1856 states and 5422 transitions. Second operand has 26 states, 26 states have (on average 3.1923076923076925) internal successors, (83), 25 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:40:32,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:40:32,583 INFO L93 Difference]: Finished difference Result 2754 states and 7938 transitions. [2022-02-15 14:40:32,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-02-15 14:40:32,584 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 3.1923076923076925) internal successors, (83), 25 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-02-15 14:40:32,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:40:32,588 INFO L225 Difference]: With dead ends: 2754 [2022-02-15 14:40:32,588 INFO L226 Difference]: Without dead ends: 2739 [2022-02-15 14:40:32,589 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 46 SyntacticMatches, 5 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 613 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=334, Invalid=1646, Unknown=0, NotChecked=0, Total=1980 [2022-02-15 14:40:32,589 INFO L933 BasicCegarLoop]: 120 mSDtfsCounter, 440 mSDsluCounter, 2191 mSDsCounter, 0 mSdLazyCounter, 1567 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 440 SdHoareTripleChecker+Valid, 1516 SdHoareTripleChecker+Invalid, 1768 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 1567 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 142 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-15 14:40:32,589 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [440 Valid, 1516 Invalid, 1768 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 1567 Invalid, 0 Unknown, 142 Unchecked, 0.6s Time] [2022-02-15 14:40:32,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2739 states. [2022-02-15 14:40:32,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2739 to 1852. [2022-02-15 14:40:32,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1852 states, 1851 states have (on average 2.921663965424095) internal successors, (5408), 1851 states have internal predecessors, (5408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:40:32,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1852 states to 1852 states and 5408 transitions. [2022-02-15 14:40:32,612 INFO L78 Accepts]: Start accepts. Automaton has 1852 states and 5408 transitions. Word has length 33 [2022-02-15 14:40:32,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:40:32,612 INFO L470 AbstractCegarLoop]: Abstraction has 1852 states and 5408 transitions. [2022-02-15 14:40:32,612 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 3.1923076923076925) internal successors, (83), 25 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:40:32,612 INFO L276 IsEmpty]: Start isEmpty. Operand 1852 states and 5408 transitions. [2022-02-15 14:40:32,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-02-15 14:40:32,614 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:40:32,614 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:40:32,632 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2022-02-15 14:40:32,815 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:40:32,815 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 14:40:32,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:40:32,815 INFO L85 PathProgramCache]: Analyzing trace with hash -23814905, now seen corresponding path program 42 times [2022-02-15 14:40:32,815 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:40:32,815 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1711012328] [2022-02-15 14:40:32,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:40:32,816 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:40:32,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:40:33,042 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:40:33,042 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:40:33,042 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1711012328] [2022-02-15 14:40:33,042 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1711012328] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:40:33,042 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2146340457] [2022-02-15 14:40:33,043 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-15 14:40:33,043 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:40:33,043 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:40:33,044 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) [2022-02-15 14:40:33,045 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2022-02-15 14:40:33,068 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-02-15 14:40:33,068 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:40:33,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 25 conjunts are in the unsatisfiable core [2022-02-15 14:40:33,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:40:33,274 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-02-15 14:40:33,456 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:40:33,456 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:40:33,907 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:40:33,907 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2146340457] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:40:33,907 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:40:33,908 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 23 [2022-02-15 14:40:33,908 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671629596] [2022-02-15 14:40:33,908 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:40:33,908 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-02-15 14:40:33,908 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:40:33,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-02-15 14:40:33,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=459, Unknown=0, NotChecked=0, Total=552 [2022-02-15 14:40:33,908 INFO L87 Difference]: Start difference. First operand 1852 states and 5408 transitions. Second operand has 24 states, 24 states have (on average 3.0) internal successors, (72), 23 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:40:35,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:40:35,201 INFO L93 Difference]: Finished difference Result 3491 states and 10010 transitions. [2022-02-15 14:40:35,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-02-15 14:40:35,201 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 3.0) internal successors, (72), 23 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-02-15 14:40:35,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:40:35,206 INFO L225 Difference]: With dead ends: 3491 [2022-02-15 14:40:35,206 INFO L226 Difference]: Without dead ends: 3476 [2022-02-15 14:40:35,209 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 45 SyntacticMatches, 8 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 645 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=328, Invalid=1742, Unknown=0, NotChecked=0, Total=2070 [2022-02-15 14:40:35,209 INFO L933 BasicCegarLoop]: 129 mSDtfsCounter, 483 mSDsluCounter, 1940 mSDsCounter, 0 mSdLazyCounter, 1500 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 483 SdHoareTripleChecker+Valid, 1358 SdHoareTripleChecker+Invalid, 1546 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 1500 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-15 14:40:35,209 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [483 Valid, 1358 Invalid, 1546 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 1500 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-15 14:40:35,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3476 states. [2022-02-15 14:40:35,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3476 to 1867. [2022-02-15 14:40:35,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1867 states, 1866 states have (on average 2.9217577706323685) internal successors, (5452), 1866 states have internal predecessors, (5452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:40:35,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1867 states to 1867 states and 5452 transitions. [2022-02-15 14:40:35,235 INFO L78 Accepts]: Start accepts. Automaton has 1867 states and 5452 transitions. Word has length 33 [2022-02-15 14:40:35,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:40:35,235 INFO L470 AbstractCegarLoop]: Abstraction has 1867 states and 5452 transitions. [2022-02-15 14:40:35,235 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 3.0) internal successors, (72), 23 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:40:35,235 INFO L276 IsEmpty]: Start isEmpty. Operand 1867 states and 5452 transitions. [2022-02-15 14:40:35,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-02-15 14:40:35,237 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:40:35,237 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:40:35,254 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Ended with exit code 0 [2022-02-15 14:40:35,437 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:40:35,437 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 14:40:35,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:40:35,438 INFO L85 PathProgramCache]: Analyzing trace with hash -1306962365, now seen corresponding path program 43 times [2022-02-15 14:40:35,438 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:40:35,438 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1461323425] [2022-02-15 14:40:35,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:40:35,438 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:40:35,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:40:35,623 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:40:35,623 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:40:35,623 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1461323425] [2022-02-15 14:40:35,623 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1461323425] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:40:35,623 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1576970346] [2022-02-15 14:40:35,623 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-15 14:40:35,624 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:40:35,624 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:40:35,624 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) [2022-02-15 14:40:35,625 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2022-02-15 14:40:35,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:40:35,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-15 14:40:35,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:40:36,002 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:40:36,002 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:40:36,433 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:40:36,434 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1576970346] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:40:36,434 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:40:36,434 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 26 [2022-02-15 14:40:36,434 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [577738983] [2022-02-15 14:40:36,434 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:40:36,434 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-15 14:40:36,434 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:40:36,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-15 14:40:36,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=584, Unknown=0, NotChecked=0, Total=702 [2022-02-15 14:40:36,435 INFO L87 Difference]: Start difference. First operand 1867 states and 5452 transitions. Second operand has 27 states, 27 states have (on average 3.1481481481481484) internal successors, (85), 26 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) [2022-02-15 14:40:37,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:40:37,746 INFO L93 Difference]: Finished difference Result 3807 states and 10798 transitions. [2022-02-15 14:40:37,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-02-15 14:40:37,746 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 3.1481481481481484) internal successors, (85), 26 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) Word has length 33 [2022-02-15 14:40:37,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:40:37,751 INFO L225 Difference]: With dead ends: 3807 [2022-02-15 14:40:37,752 INFO L226 Difference]: Without dead ends: 3792 [2022-02-15 14:40:37,752 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 47 SyntacticMatches, 3 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 743 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=363, Invalid=1989, Unknown=0, NotChecked=0, Total=2352 [2022-02-15 14:40:37,752 INFO L933 BasicCegarLoop]: 142 mSDtfsCounter, 468 mSDsluCounter, 2376 mSDsCounter, 0 mSdLazyCounter, 1777 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 468 SdHoareTripleChecker+Valid, 1617 SdHoareTripleChecker+Invalid, 1825 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 1777 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-15 14:40:37,752 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [468 Valid, 1617 Invalid, 1825 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 1777 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-15 14:40:37,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3792 states. [2022-02-15 14:40:37,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3792 to 1847. [2022-02-15 14:40:37,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1847 states, 1846 states have (on average 2.9209100758396533) internal successors, (5392), 1846 states have internal predecessors, (5392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:40:37,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1847 states to 1847 states and 5392 transitions. [2022-02-15 14:40:37,780 INFO L78 Accepts]: Start accepts. Automaton has 1847 states and 5392 transitions. Word has length 33 [2022-02-15 14:40:37,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:40:37,780 INFO L470 AbstractCegarLoop]: Abstraction has 1847 states and 5392 transitions. [2022-02-15 14:40:37,781 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 3.1481481481481484) internal successors, (85), 26 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) [2022-02-15 14:40:37,781 INFO L276 IsEmpty]: Start isEmpty. Operand 1847 states and 5392 transitions. [2022-02-15 14:40:37,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-02-15 14:40:37,783 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:40:37,783 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:40:37,798 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2022-02-15 14:40:37,983 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2022-02-15 14:40:37,983 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 14:40:37,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:40:37,983 INFO L85 PathProgramCache]: Analyzing trace with hash -1023381209, now seen corresponding path program 44 times [2022-02-15 14:40:37,983 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:40:37,984 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [283305687] [2022-02-15 14:40:37,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:40:37,984 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:40:37,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:40:38,186 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:40:38,186 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:40:38,186 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [283305687] [2022-02-15 14:40:38,186 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [283305687] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:40:38,186 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [380826992] [2022-02-15 14:40:38,186 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-15 14:40:38,186 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:40:38,186 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:40:38,187 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) [2022-02-15 14:40:38,188 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2022-02-15 14:40:38,210 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-15 14:40:38,210 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:40:38,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 22 conjunts are in the unsatisfiable core [2022-02-15 14:40:38,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:40:38,590 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:40:38,590 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:40:39,003 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:40:39,004 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [380826992] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:40:39,004 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:40:39,004 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 24 [2022-02-15 14:40:39,004 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1269762514] [2022-02-15 14:40:39,004 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:40:39,004 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-15 14:40:39,004 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:40:39,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-15 14:40:39,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=496, Unknown=0, NotChecked=0, Total=600 [2022-02-15 14:40:39,005 INFO L87 Difference]: Start difference. First operand 1847 states and 5392 transitions. Second operand has 25 states, 25 states have (on average 2.92) internal successors, (73), 24 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:40:39,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:40:39,917 INFO L93 Difference]: Finished difference Result 3342 states and 9620 transitions. [2022-02-15 14:40:39,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-02-15 14:40:39,917 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.92) internal successors, (73), 24 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-02-15 14:40:39,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:40:39,922 INFO L225 Difference]: With dead ends: 3342 [2022-02-15 14:40:39,922 INFO L226 Difference]: Without dead ends: 3327 [2022-02-15 14:40:39,922 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 46 SyntacticMatches, 6 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 561 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=289, Invalid=1433, Unknown=0, NotChecked=0, Total=1722 [2022-02-15 14:40:39,923 INFO L933 BasicCegarLoop]: 114 mSDtfsCounter, 412 mSDsluCounter, 1413 mSDsCounter, 0 mSdLazyCounter, 1126 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 412 SdHoareTripleChecker+Valid, 983 SdHoareTripleChecker+Invalid, 1156 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 1126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-15 14:40:39,923 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [412 Valid, 983 Invalid, 1156 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 1126 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-15 14:40:39,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3327 states. [2022-02-15 14:40:39,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3327 to 1931. [2022-02-15 14:40:39,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1931 states, 1930 states have (on average 2.9098445595854923) internal successors, (5616), 1930 states have internal predecessors, (5616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:40:39,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1931 states to 1931 states and 5616 transitions. [2022-02-15 14:40:39,952 INFO L78 Accepts]: Start accepts. Automaton has 1931 states and 5616 transitions. Word has length 33 [2022-02-15 14:40:39,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:40:39,953 INFO L470 AbstractCegarLoop]: Abstraction has 1931 states and 5616 transitions. [2022-02-15 14:40:39,953 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.92) internal successors, (73), 24 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:40:39,953 INFO L276 IsEmpty]: Start isEmpty. Operand 1931 states and 5616 transitions. [2022-02-15 14:40:39,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-02-15 14:40:39,955 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:40:39,955 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:40:39,970 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2022-02-15 14:40:40,155 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2022-02-15 14:40:40,155 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 14:40:40,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:40:40,156 INFO L85 PathProgramCache]: Analyzing trace with hash -1059014257, now seen corresponding path program 45 times [2022-02-15 14:40:40,156 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:40:40,156 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [256596299] [2022-02-15 14:40:40,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:40:40,156 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:40:40,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:40:40,379 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:40:40,380 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:40:40,380 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [256596299] [2022-02-15 14:40:40,380 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [256596299] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:40:40,380 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [895650898] [2022-02-15 14:40:40,380 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-15 14:40:40,380 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:40:40,380 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:40:40,381 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) [2022-02-15 14:40:40,384 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2022-02-15 14:40:40,408 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-02-15 14:40:40,408 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:40:40,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 25 conjunts are in the unsatisfiable core [2022-02-15 14:40:40,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:40:40,652 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-02-15 14:40:40,884 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:40:40,885 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:40:41,335 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:40:41,335 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [895650898] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:40:41,335 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:40:41,335 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 22 [2022-02-15 14:40:41,336 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [412933122] [2022-02-15 14:40:41,336 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:40:41,336 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-02-15 14:40:41,336 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:40:41,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-02-15 14:40:41,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=425, Unknown=0, NotChecked=0, Total=506 [2022-02-15 14:40:41,336 INFO L87 Difference]: Start difference. First operand 1931 states and 5616 transitions. Second operand has 23 states, 23 states have (on average 3.0434782608695654) internal successors, (70), 22 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:40:42,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:40:42,642 INFO L93 Difference]: Finished difference Result 2954 states and 8432 transitions. [2022-02-15 14:40:42,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-02-15 14:40:42,642 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.0434782608695654) internal successors, (70), 22 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-02-15 14:40:42,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:40:42,646 INFO L225 Difference]: With dead ends: 2954 [2022-02-15 14:40:42,646 INFO L226 Difference]: Without dead ends: 2939 [2022-02-15 14:40:42,646 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 45 SyntacticMatches, 9 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 532 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=298, Invalid=1508, Unknown=0, NotChecked=0, Total=1806 [2022-02-15 14:40:42,647 INFO L933 BasicCegarLoop]: 123 mSDtfsCounter, 451 mSDsluCounter, 1574 mSDsCounter, 0 mSdLazyCounter, 1251 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 451 SdHoareTripleChecker+Valid, 1098 SdHoareTripleChecker+Invalid, 1303 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 1251 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-15 14:40:42,647 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [451 Valid, 1098 Invalid, 1303 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 1251 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-15 14:40:42,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2939 states. [2022-02-15 14:40:42,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2939 to 1994. [2022-02-15 14:40:42,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1994 states, 1993 states have (on average 2.912694430506774) internal successors, (5805), 1993 states have internal predecessors, (5805), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:40:42,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1994 states to 1994 states and 5805 transitions. [2022-02-15 14:40:42,671 INFO L78 Accepts]: Start accepts. Automaton has 1994 states and 5805 transitions. Word has length 33 [2022-02-15 14:40:42,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:40:42,671 INFO L470 AbstractCegarLoop]: Abstraction has 1994 states and 5805 transitions. [2022-02-15 14:40:42,671 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.0434782608695654) internal successors, (70), 22 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:40:42,671 INFO L276 IsEmpty]: Start isEmpty. Operand 1994 states and 5805 transitions. [2022-02-15 14:40:42,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-02-15 14:40:42,673 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:40:42,673 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:40:42,689 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Ended with exit code 0 [2022-02-15 14:40:42,874 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2022-02-15 14:40:42,874 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 14:40:42,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:40:42,874 INFO L85 PathProgramCache]: Analyzing trace with hash -1287773101, now seen corresponding path program 46 times [2022-02-15 14:40:42,874 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:40:42,874 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1766052596] [2022-02-15 14:40:42,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:40:42,875 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:40:42,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:40:43,061 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:40:43,061 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:40:43,061 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1766052596] [2022-02-15 14:40:43,061 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1766052596] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:40:43,061 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [217794311] [2022-02-15 14:40:43,061 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-15 14:40:43,062 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:40:43,062 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:40:43,062 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) [2022-02-15 14:40:43,063 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2022-02-15 14:40:43,086 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-15 14:40:43,086 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:40:43,086 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-15 14:40:43,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:40:43,424 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:40:43,424 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:40:43,849 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:40:43,849 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [217794311] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:40:43,849 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:40:43,849 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 25 [2022-02-15 14:40:43,849 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [760039562] [2022-02-15 14:40:43,849 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:40:43,849 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-15 14:40:43,849 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:40:43,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-15 14:40:43,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=545, Unknown=0, NotChecked=0, Total=650 [2022-02-15 14:40:43,850 INFO L87 Difference]: Start difference. First operand 1994 states and 5805 transitions. Second operand has 26 states, 26 states have (on average 3.269230769230769) internal successors, (85), 25 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) [2022-02-15 14:40:44,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:40:44,958 INFO L93 Difference]: Finished difference Result 3279 states and 9420 transitions. [2022-02-15 14:40:44,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-02-15 14:40:44,959 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 3.269230769230769) internal successors, (85), 25 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) Word has length 33 [2022-02-15 14:40:44,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:40:44,964 INFO L225 Difference]: With dead ends: 3279 [2022-02-15 14:40:44,964 INFO L226 Difference]: Without dead ends: 3264 [2022-02-15 14:40:44,965 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 46 SyntacticMatches, 5 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 605 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=303, Invalid=1589, Unknown=0, NotChecked=0, Total=1892 [2022-02-15 14:40:44,965 INFO L933 BasicCegarLoop]: 120 mSDtfsCounter, 415 mSDsluCounter, 1654 mSDsCounter, 0 mSdLazyCounter, 1242 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 415 SdHoareTripleChecker+Valid, 1149 SdHoareTripleChecker+Invalid, 1285 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 1242 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-15 14:40:44,965 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [415 Valid, 1149 Invalid, 1285 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 1242 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-15 14:40:44,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3264 states. [2022-02-15 14:40:44,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3264 to 1973. [2022-02-15 14:40:44,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1973 states, 1972 states have (on average 2.9046653144016226) internal successors, (5728), 1972 states have internal predecessors, (5728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:40:44,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1973 states to 1973 states and 5728 transitions. [2022-02-15 14:40:44,991 INFO L78 Accepts]: Start accepts. Automaton has 1973 states and 5728 transitions. Word has length 33 [2022-02-15 14:40:44,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:40:44,992 INFO L470 AbstractCegarLoop]: Abstraction has 1973 states and 5728 transitions. [2022-02-15 14:40:44,992 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 3.269230769230769) internal successors, (85), 25 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) [2022-02-15 14:40:44,992 INFO L276 IsEmpty]: Start isEmpty. Operand 1973 states and 5728 transitions. [2022-02-15 14:40:44,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-02-15 14:40:44,994 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:40:44,994 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:40:45,009 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2022-02-15 14:40:45,199 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:40:45,200 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 14:40:45,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:40:45,200 INFO L85 PathProgramCache]: Analyzing trace with hash 2060462395, now seen corresponding path program 47 times [2022-02-15 14:40:45,200 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:40:45,200 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [518448791] [2022-02-15 14:40:45,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:40:45,200 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:40:45,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:40:45,418 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:40:45,418 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:40:45,418 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [518448791] [2022-02-15 14:40:45,418 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [518448791] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:40:45,418 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2078909053] [2022-02-15 14:40:45,418 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-15 14:40:45,419 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:40:45,419 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:40:45,420 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) [2022-02-15 14:40:45,421 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2022-02-15 14:40:45,446 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-15 14:40:45,446 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:40:45,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-15 14:40:45,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:40:45,838 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:40:45,838 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:40:46,283 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:40:46,283 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2078909053] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:40:46,283 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:40:46,283 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 26 [2022-02-15 14:40:46,283 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1241732212] [2022-02-15 14:40:46,283 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:40:46,284 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-15 14:40:46,284 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:40:46,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-15 14:40:46,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=584, Unknown=0, NotChecked=0, Total=702 [2022-02-15 14:40:46,284 INFO L87 Difference]: Start difference. First operand 1973 states and 5728 transitions. Second operand has 27 states, 27 states have (on average 3.185185185185185) internal successors, (86), 26 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:40:47,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:40:47,361 INFO L93 Difference]: Finished difference Result 3659 states and 10458 transitions. [2022-02-15 14:40:47,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-02-15 14:40:47,361 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 3.185185185185185) internal successors, (86), 26 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-02-15 14:40:47,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:40:47,367 INFO L225 Difference]: With dead ends: 3659 [2022-02-15 14:40:47,367 INFO L226 Difference]: Without dead ends: 3629 [2022-02-15 14:40:47,367 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 47 SyntacticMatches, 4 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 665 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=343, Invalid=1727, Unknown=0, NotChecked=0, Total=2070 [2022-02-15 14:40:47,367 INFO L933 BasicCegarLoop]: 108 mSDtfsCounter, 416 mSDsluCounter, 2079 mSDsCounter, 0 mSdLazyCounter, 1270 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 416 SdHoareTripleChecker+Valid, 1364 SdHoareTripleChecker+Invalid, 1632 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 1270 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 334 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-15 14:40:47,367 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [416 Valid, 1364 Invalid, 1632 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 1270 Invalid, 0 Unknown, 334 Unchecked, 0.5s Time] [2022-02-15 14:40:47,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3629 states. [2022-02-15 14:40:47,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3629 to 1994. [2022-02-15 14:40:47,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1994 states, 1993 states have (on average 2.902157551430005) internal successors, (5784), 1993 states have internal predecessors, (5784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:40:47,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1994 states to 1994 states and 5784 transitions. [2022-02-15 14:40:47,394 INFO L78 Accepts]: Start accepts. Automaton has 1994 states and 5784 transitions. Word has length 33 [2022-02-15 14:40:47,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:40:47,394 INFO L470 AbstractCegarLoop]: Abstraction has 1994 states and 5784 transitions. [2022-02-15 14:40:47,394 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 3.185185185185185) internal successors, (86), 26 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:40:47,394 INFO L276 IsEmpty]: Start isEmpty. Operand 1994 states and 5784 transitions. [2022-02-15 14:40:47,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-02-15 14:40:47,396 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:40:47,397 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:40:47,412 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Ended with exit code 0 [2022-02-15 14:40:47,597 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2022-02-15 14:40:47,597 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 14:40:47,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:40:47,597 INFO L85 PathProgramCache]: Analyzing trace with hash 1906024877, now seen corresponding path program 48 times [2022-02-15 14:40:47,597 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:40:47,598 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [47278298] [2022-02-15 14:40:47,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:40:47,598 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:40:47,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:40:47,865 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:40:47,865 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:40:47,865 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [47278298] [2022-02-15 14:40:47,865 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [47278298] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:40:47,865 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [61698948] [2022-02-15 14:40:47,865 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-15 14:40:47,865 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:40:47,866 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:40:47,866 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) [2022-02-15 14:40:47,870 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2022-02-15 14:40:47,893 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-02-15 14:40:47,893 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:40:47,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 25 conjunts are in the unsatisfiable core [2022-02-15 14:40:47,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:40:48,072 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-02-15 14:40:48,297 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:40:48,297 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:40:48,765 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:40:48,765 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [61698948] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:40:48,765 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:40:48,765 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 23 [2022-02-15 14:40:48,765 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428742063] [2022-02-15 14:40:48,766 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:40:48,766 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-02-15 14:40:48,766 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:40:48,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-02-15 14:40:48,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=459, Unknown=0, NotChecked=0, Total=552 [2022-02-15 14:40:48,766 INFO L87 Difference]: Start difference. First operand 1994 states and 5784 transitions. Second operand has 24 states, 24 states have (on average 2.9583333333333335) internal successors, (71), 23 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:40:49,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:40:49,938 INFO L93 Difference]: Finished difference Result 3541 states and 10148 transitions. [2022-02-15 14:40:49,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-02-15 14:40:49,938 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.9583333333333335) internal successors, (71), 23 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-02-15 14:40:49,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:40:49,943 INFO L225 Difference]: With dead ends: 3541 [2022-02-15 14:40:49,943 INFO L226 Difference]: Without dead ends: 3526 [2022-02-15 14:40:49,943 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 45 SyntacticMatches, 8 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 531 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=282, Invalid=1440, Unknown=0, NotChecked=0, Total=1722 [2022-02-15 14:40:49,944 INFO L933 BasicCegarLoop]: 119 mSDtfsCounter, 351 mSDsluCounter, 2140 mSDsCounter, 0 mSdLazyCounter, 1631 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 351 SdHoareTripleChecker+Valid, 1448 SdHoareTripleChecker+Invalid, 1666 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 1631 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-15 14:40:49,944 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [351 Valid, 1448 Invalid, 1666 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 1631 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-15 14:40:49,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3526 states. [2022-02-15 14:40:49,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3526 to 1889. [2022-02-15 14:40:49,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1889 states, 1888 states have (on average 2.9152542372881354) internal successors, (5504), 1888 states have internal predecessors, (5504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:40:49,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1889 states to 1889 states and 5504 transitions. [2022-02-15 14:40:49,969 INFO L78 Accepts]: Start accepts. Automaton has 1889 states and 5504 transitions. Word has length 33 [2022-02-15 14:40:49,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:40:49,969 INFO L470 AbstractCegarLoop]: Abstraction has 1889 states and 5504 transitions. [2022-02-15 14:40:49,969 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.9583333333333335) internal successors, (71), 23 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:40:49,970 INFO L276 IsEmpty]: Start isEmpty. Operand 1889 states and 5504 transitions. [2022-02-15 14:40:49,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-02-15 14:40:49,972 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:40:49,972 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:40:49,987 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Ended with exit code 0 [2022-02-15 14:40:50,172 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:40:50,172 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 14:40:50,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:40:50,172 INFO L85 PathProgramCache]: Analyzing trace with hash -493544957, now seen corresponding path program 49 times [2022-02-15 14:40:50,172 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:40:50,173 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1667083897] [2022-02-15 14:40:50,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:40:50,173 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:40:50,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:40:50,381 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:40:50,381 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:40:50,381 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1667083897] [2022-02-15 14:40:50,381 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1667083897] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:40:50,381 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [711203158] [2022-02-15 14:40:50,382 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-15 14:40:50,382 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:40:50,382 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:40:50,383 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) [2022-02-15 14:40:50,384 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2022-02-15 14:40:50,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:40:50,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-15 14:40:50,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:40:50,886 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:40:50,886 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:40:51,317 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:40:51,317 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [711203158] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:40:51,318 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:40:51,318 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 23 [2022-02-15 14:40:51,318 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1959771470] [2022-02-15 14:40:51,318 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:40:51,318 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-02-15 14:40:51,318 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:40:51,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-02-15 14:40:51,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=463, Unknown=0, NotChecked=0, Total=552 [2022-02-15 14:40:51,318 INFO L87 Difference]: Start difference. First operand 1889 states and 5504 transitions. Second operand has 24 states, 24 states have (on average 3.0) internal successors, (72), 23 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:40:52,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:40:52,736 INFO L93 Difference]: Finished difference Result 2759 states and 7953 transitions. [2022-02-15 14:40:52,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-02-15 14:40:52,737 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 3.0) internal successors, (72), 23 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-02-15 14:40:52,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:40:52,741 INFO L225 Difference]: With dead ends: 2759 [2022-02-15 14:40:52,741 INFO L226 Difference]: Without dead ends: 2740 [2022-02-15 14:40:52,741 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 48 SyntacticMatches, 5 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 587 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=323, Invalid=1657, Unknown=0, NotChecked=0, Total=1980 [2022-02-15 14:40:52,741 INFO L933 BasicCegarLoop]: 120 mSDtfsCounter, 403 mSDsluCounter, 1951 mSDsCounter, 0 mSdLazyCounter, 1546 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 403 SdHoareTripleChecker+Valid, 1355 SdHoareTripleChecker+Invalid, 1596 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 1546 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-15 14:40:52,742 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [403 Valid, 1355 Invalid, 1596 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 1546 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-15 14:40:52,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2740 states. [2022-02-15 14:40:52,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2740 to 1915. [2022-02-15 14:40:52,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1915 states, 1914 states have (on average 2.9221525600835947) internal successors, (5593), 1914 states have internal predecessors, (5593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:40:52,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1915 states to 1915 states and 5593 transitions. [2022-02-15 14:40:52,765 INFO L78 Accepts]: Start accepts. Automaton has 1915 states and 5593 transitions. Word has length 33 [2022-02-15 14:40:52,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:40:52,765 INFO L470 AbstractCegarLoop]: Abstraction has 1915 states and 5593 transitions. [2022-02-15 14:40:52,765 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 3.0) internal successors, (72), 23 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:40:52,765 INFO L276 IsEmpty]: Start isEmpty. Operand 1915 states and 5593 transitions. [2022-02-15 14:40:52,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-02-15 14:40:52,767 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:40:52,767 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:40:52,783 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2022-02-15 14:40:52,967 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2022-02-15 14:40:52,968 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 14:40:52,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:40:52,968 INFO L85 PathProgramCache]: Analyzing trace with hash 382637507, now seen corresponding path program 50 times [2022-02-15 14:40:52,968 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:40:52,968 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1774647311] [2022-02-15 14:40:52,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:40:52,968 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:40:52,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:40:53,172 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:40:53,173 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:40:53,173 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1774647311] [2022-02-15 14:40:53,173 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1774647311] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:40:53,173 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [330933346] [2022-02-15 14:40:53,173 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-15 14:40:53,173 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:40:53,173 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:40:53,174 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) [2022-02-15 14:40:53,175 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2022-02-15 14:40:53,198 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-15 14:40:53,198 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:40:53,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 25 conjunts are in the unsatisfiable core [2022-02-15 14:40:53,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:40:53,375 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-02-15 14:40:53,665 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:40:53,665 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:40:54,120 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:40:54,120 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [330933346] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:40:54,120 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:40:54,120 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 25 [2022-02-15 14:40:54,120 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1840645901] [2022-02-15 14:40:54,120 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:40:54,120 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-15 14:40:54,120 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:40:54,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-15 14:40:54,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=539, Unknown=0, NotChecked=0, Total=650 [2022-02-15 14:40:54,121 INFO L87 Difference]: Start difference. First operand 1915 states and 5593 transitions. Second operand has 26 states, 26 states have (on average 3.269230769230769) internal successors, (85), 25 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) [2022-02-15 14:40:55,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:40:55,652 INFO L93 Difference]: Finished difference Result 2759 states and 7947 transitions. [2022-02-15 14:40:55,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-02-15 14:40:55,653 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 3.269230769230769) internal successors, (85), 25 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) Word has length 33 [2022-02-15 14:40:55,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:40:55,656 INFO L225 Difference]: With dead ends: 2759 [2022-02-15 14:40:55,656 INFO L226 Difference]: Without dead ends: 2744 [2022-02-15 14:40:55,657 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 45 SyntacticMatches, 6 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 659 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=377, Invalid=1785, Unknown=0, NotChecked=0, Total=2162 [2022-02-15 14:40:55,657 INFO L933 BasicCegarLoop]: 121 mSDtfsCounter, 442 mSDsluCounter, 2261 mSDsCounter, 0 mSdLazyCounter, 1912 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 442 SdHoareTripleChecker+Valid, 1515 SdHoareTripleChecker+Invalid, 1979 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 1912 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-15 14:40:55,657 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [442 Valid, 1515 Invalid, 1979 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 1912 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-15 14:40:55,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2744 states. [2022-02-15 14:40:55,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2744 to 1911. [2022-02-15 14:40:55,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1911 states, 1910 states have (on average 2.9209424083769635) internal successors, (5579), 1910 states have internal predecessors, (5579), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:40:55,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1911 states to 1911 states and 5579 transitions. [2022-02-15 14:40:55,679 INFO L78 Accepts]: Start accepts. Automaton has 1911 states and 5579 transitions. Word has length 33 [2022-02-15 14:40:55,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:40:55,679 INFO L470 AbstractCegarLoop]: Abstraction has 1911 states and 5579 transitions. [2022-02-15 14:40:55,679 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 3.269230769230769) internal successors, (85), 25 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) [2022-02-15 14:40:55,679 INFO L276 IsEmpty]: Start isEmpty. Operand 1911 states and 5579 transitions. [2022-02-15 14:40:55,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-02-15 14:40:55,681 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:40:55,681 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:40:55,699 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Forceful destruction successful, exit code 0 [2022-02-15 14:40:55,896 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2022-02-15 14:40:55,897 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 14:40:55,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:40:55,897 INFO L85 PathProgramCache]: Analyzing trace with hash -1720498621, now seen corresponding path program 51 times [2022-02-15 14:40:55,897 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:40:55,897 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [494893168] [2022-02-15 14:40:55,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:40:55,897 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:40:55,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:40:56,066 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:40:56,066 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:40:56,066 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [494893168] [2022-02-15 14:40:56,066 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [494893168] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:40:56,066 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1540586963] [2022-02-15 14:40:56,066 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-15 14:40:56,066 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:40:56,066 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:40:56,068 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) [2022-02-15 14:40:56,068 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2022-02-15 14:40:56,092 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-15 14:40:56,092 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:40:56,092 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-15 14:40:56,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:40:56,265 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-02-15 14:40:56,494 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:40:56,494 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:40:56,937 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:40:56,937 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1540586963] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:40:56,937 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:40:56,937 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 25 [2022-02-15 14:40:56,937 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [767132693] [2022-02-15 14:40:56,937 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:40:56,937 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-15 14:40:56,937 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:40:56,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-15 14:40:56,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=542, Unknown=0, NotChecked=0, Total=650 [2022-02-15 14:40:56,938 INFO L87 Difference]: Start difference. First operand 1911 states and 5579 transitions. Second operand has 26 states, 26 states have (on average 3.269230769230769) internal successors, (85), 25 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) [2022-02-15 14:40:58,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:40:58,072 INFO L93 Difference]: Finished difference Result 2931 states and 8523 transitions. [2022-02-15 14:40:58,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-02-15 14:40:58,073 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 3.269230769230769) internal successors, (85), 25 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) Word has length 33 [2022-02-15 14:40:58,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:40:58,077 INFO L225 Difference]: With dead ends: 2931 [2022-02-15 14:40:58,077 INFO L226 Difference]: Without dead ends: 2912 [2022-02-15 14:40:58,077 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 46 SyntacticMatches, 5 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 545 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=305, Invalid=1501, Unknown=0, NotChecked=0, Total=1806 [2022-02-15 14:40:58,077 INFO L933 BasicCegarLoop]: 98 mSDtfsCounter, 328 mSDsluCounter, 2112 mSDsCounter, 0 mSdLazyCounter, 1707 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 328 SdHoareTripleChecker+Valid, 1436 SdHoareTripleChecker+Invalid, 1747 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 1707 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-15 14:40:58,078 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [328 Valid, 1436 Invalid, 1747 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 1707 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-15 14:40:58,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2912 states. [2022-02-15 14:40:58,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2912 to 1933. [2022-02-15 14:40:58,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1933 states, 1932 states have (on average 2.9151138716356106) internal successors, (5632), 1932 states have internal predecessors, (5632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:40:58,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1933 states to 1933 states and 5632 transitions. [2022-02-15 14:40:58,105 INFO L78 Accepts]: Start accepts. Automaton has 1933 states and 5632 transitions. Word has length 33 [2022-02-15 14:40:58,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:40:58,105 INFO L470 AbstractCegarLoop]: Abstraction has 1933 states and 5632 transitions. [2022-02-15 14:40:58,105 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 3.269230769230769) internal successors, (85), 25 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) [2022-02-15 14:40:58,105 INFO L276 IsEmpty]: Start isEmpty. Operand 1933 states and 5632 transitions. [2022-02-15 14:40:58,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-02-15 14:40:58,107 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:40:58,107 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:40:58,123 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Ended with exit code 0 [2022-02-15 14:40:58,307 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:40:58,308 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 14:40:58,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:40:58,308 INFO L85 PathProgramCache]: Analyzing trace with hash 741551271, now seen corresponding path program 52 times [2022-02-15 14:40:58,308 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:40:58,308 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1006476234] [2022-02-15 14:40:58,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:40:58,308 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:40:58,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:40:58,480 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:40:58,480 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:40:58,481 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1006476234] [2022-02-15 14:40:58,481 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1006476234] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:40:58,481 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [625958107] [2022-02-15 14:40:58,481 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-15 14:40:58,481 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:40:58,481 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:40:58,482 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) [2022-02-15 14:40:58,482 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2022-02-15 14:40:58,506 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-15 14:40:58,506 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:40:58,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-15 14:40:58,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:40:58,842 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:40:58,842 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:40:59,289 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:40:59,289 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [625958107] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:40:59,289 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:40:59,289 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 23 [2022-02-15 14:40:59,289 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972885492] [2022-02-15 14:40:59,289 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:40:59,289 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-02-15 14:40:59,289 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:40:59,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-02-15 14:40:59,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=459, Unknown=0, NotChecked=0, Total=552 [2022-02-15 14:40:59,290 INFO L87 Difference]: Start difference. First operand 1933 states and 5632 transitions. Second operand has 24 states, 24 states have (on average 3.0) internal successors, (72), 23 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:41:00,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:41:00,211 INFO L93 Difference]: Finished difference Result 2957 states and 8574 transitions. [2022-02-15 14:41:00,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-02-15 14:41:00,216 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 3.0) internal successors, (72), 23 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-02-15 14:41:00,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:41:00,220 INFO L225 Difference]: With dead ends: 2957 [2022-02-15 14:41:00,220 INFO L226 Difference]: Without dead ends: 2942 [2022-02-15 14:41:00,220 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 47 SyntacticMatches, 6 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 465 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=248, Invalid=1234, Unknown=0, NotChecked=0, Total=1482 [2022-02-15 14:41:00,221 INFO L933 BasicCegarLoop]: 98 mSDtfsCounter, 341 mSDsluCounter, 1439 mSDsCounter, 0 mSdLazyCounter, 1204 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 341 SdHoareTripleChecker+Valid, 990 SdHoareTripleChecker+Invalid, 1246 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 1204 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-15 14:41:00,221 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [341 Valid, 990 Invalid, 1246 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 1204 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-15 14:41:00,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2942 states. [2022-02-15 14:41:00,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2942 to 1911. [2022-02-15 14:41:00,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1911 states, 1910 states have (on average 2.9209424083769635) internal successors, (5579), 1910 states have internal predecessors, (5579), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:41:00,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1911 states to 1911 states and 5579 transitions. [2022-02-15 14:41:00,245 INFO L78 Accepts]: Start accepts. Automaton has 1911 states and 5579 transitions. Word has length 33 [2022-02-15 14:41:00,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:41:00,245 INFO L470 AbstractCegarLoop]: Abstraction has 1911 states and 5579 transitions. [2022-02-15 14:41:00,246 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 3.0) internal successors, (72), 23 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:41:00,246 INFO L276 IsEmpty]: Start isEmpty. Operand 1911 states and 5579 transitions. [2022-02-15 14:41:00,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-02-15 14:41:00,248 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:41:00,248 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:41:00,264 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Forceful destruction successful, exit code 0 [2022-02-15 14:41:00,448 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2022-02-15 14:41:00,448 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 14:41:00,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:41:00,448 INFO L85 PathProgramCache]: Analyzing trace with hash -114396377, now seen corresponding path program 53 times [2022-02-15 14:41:00,448 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:41:00,449 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [216387841] [2022-02-15 14:41:00,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:41:00,449 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:41:00,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:41:00,624 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:41:00,625 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:41:00,625 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [216387841] [2022-02-15 14:41:00,625 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [216387841] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:41:00,625 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1233994771] [2022-02-15 14:41:00,625 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-15 14:41:00,625 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:41:00,625 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:41:00,626 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) [2022-02-15 14:41:00,627 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2022-02-15 14:41:00,650 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-15 14:41:00,650 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:41:00,650 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-15 14:41:00,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:41:01,046 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:41:01,046 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:41:01,496 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:41:01,496 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1233994771] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:41:01,496 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:41:01,496 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 23 [2022-02-15 14:41:01,496 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2027376005] [2022-02-15 14:41:01,496 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:41:01,496 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-02-15 14:41:01,496 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:41:01,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-02-15 14:41:01,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=460, Unknown=0, NotChecked=0, Total=552 [2022-02-15 14:41:01,497 INFO L87 Difference]: Start difference. First operand 1911 states and 5579 transitions. Second operand has 24 states, 24 states have (on average 3.0) internal successors, (72), 23 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:41:02,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:41:02,874 INFO L93 Difference]: Finished difference Result 2866 states and 8198 transitions. [2022-02-15 14:41:02,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-02-15 14:41:02,875 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 3.0) internal successors, (72), 23 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-02-15 14:41:02,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:41:02,879 INFO L225 Difference]: With dead ends: 2866 [2022-02-15 14:41:02,879 INFO L226 Difference]: Without dead ends: 2851 [2022-02-15 14:41:02,879 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 47 SyntacticMatches, 6 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 587 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=348, Invalid=1632, Unknown=0, NotChecked=0, Total=1980 [2022-02-15 14:41:02,880 INFO L933 BasicCegarLoop]: 112 mSDtfsCounter, 496 mSDsluCounter, 1728 mSDsCounter, 0 mSdLazyCounter, 1468 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 496 SdHoareTripleChecker+Valid, 1178 SdHoareTripleChecker+Invalid, 1536 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 1468 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-15 14:41:02,880 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [496 Valid, 1178 Invalid, 1536 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 1468 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-15 14:41:02,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2851 states. [2022-02-15 14:41:02,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2851 to 1932. [2022-02-15 14:41:02,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1932 states, 1931 states have (on average 2.9290523045054377) internal successors, (5656), 1931 states have internal predecessors, (5656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:41:02,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1932 states to 1932 states and 5656 transitions. [2022-02-15 14:41:02,912 INFO L78 Accepts]: Start accepts. Automaton has 1932 states and 5656 transitions. Word has length 33 [2022-02-15 14:41:02,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:41:02,912 INFO L470 AbstractCegarLoop]: Abstraction has 1932 states and 5656 transitions. [2022-02-15 14:41:02,912 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 3.0) internal successors, (72), 23 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:41:02,912 INFO L276 IsEmpty]: Start isEmpty. Operand 1932 states and 5656 transitions. [2022-02-15 14:41:02,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-02-15 14:41:02,914 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:41:02,914 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:41:02,930 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Ended with exit code 0 [2022-02-15 14:41:03,115 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2022-02-15 14:41:03,115 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 14:41:03,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:41:03,116 INFO L85 PathProgramCache]: Analyzing trace with hash -1780794963, now seen corresponding path program 54 times [2022-02-15 14:41:03,116 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:41:03,116 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [827322567] [2022-02-15 14:41:03,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:41:03,116 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:41:03,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:41:03,297 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:41:03,297 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:41:03,297 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [827322567] [2022-02-15 14:41:03,297 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [827322567] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:41:03,297 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [416944225] [2022-02-15 14:41:03,297 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-15 14:41:03,297 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:41:03,298 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:41:03,298 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) [2022-02-15 14:41:03,299 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2022-02-15 14:41:03,322 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-15 14:41:03,322 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:41:03,323 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 22 conjunts are in the unsatisfiable core [2022-02-15 14:41:03,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:41:03,761 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:41:03,761 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:41:04,195 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:41:04,196 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [416944225] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:41:04,196 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:41:04,196 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 25 [2022-02-15 14:41:04,196 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [276701692] [2022-02-15 14:41:04,196 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:41:04,196 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-15 14:41:04,196 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:41:04,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-15 14:41:04,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=546, Unknown=0, NotChecked=0, Total=650 [2022-02-15 14:41:04,196 INFO L87 Difference]: Start difference. First operand 1932 states and 5656 transitions. Second operand has 26 states, 26 states have (on average 3.269230769230769) internal successors, (85), 25 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) [2022-02-15 14:41:05,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:41:05,659 INFO L93 Difference]: Finished difference Result 2837 states and 8133 transitions. [2022-02-15 14:41:05,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-02-15 14:41:05,659 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 3.269230769230769) internal successors, (85), 25 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) Word has length 33 [2022-02-15 14:41:05,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:41:05,663 INFO L225 Difference]: With dead ends: 2837 [2022-02-15 14:41:05,663 INFO L226 Difference]: Without dead ends: 2822 [2022-02-15 14:41:05,664 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 46 SyntacticMatches, 5 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 704 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=381, Invalid=1971, Unknown=0, NotChecked=0, Total=2352 [2022-02-15 14:41:05,664 INFO L933 BasicCegarLoop]: 116 mSDtfsCounter, 436 mSDsluCounter, 1907 mSDsCounter, 0 mSdLazyCounter, 1521 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 436 SdHoareTripleChecker+Valid, 1306 SdHoareTripleChecker+Invalid, 1576 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 1521 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-15 14:41:05,664 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [436 Valid, 1306 Invalid, 1576 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 1521 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-15 14:41:05,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2822 states. [2022-02-15 14:41:05,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2822 to 1900. [2022-02-15 14:41:05,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1900 states, 1899 states have (on average 2.9152185360716167) internal successors, (5536), 1899 states have internal predecessors, (5536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:41:05,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1900 states to 1900 states and 5536 transitions. [2022-02-15 14:41:05,687 INFO L78 Accepts]: Start accepts. Automaton has 1900 states and 5536 transitions. Word has length 33 [2022-02-15 14:41:05,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:41:05,687 INFO L470 AbstractCegarLoop]: Abstraction has 1900 states and 5536 transitions. [2022-02-15 14:41:05,687 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 3.269230769230769) internal successors, (85), 25 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) [2022-02-15 14:41:05,687 INFO L276 IsEmpty]: Start isEmpty. Operand 1900 states and 5536 transitions. [2022-02-15 14:41:05,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-02-15 14:41:05,689 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:41:05,689 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:41:05,707 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Forceful destruction successful, exit code 0 [2022-02-15 14:41:05,889 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:41:05,889 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 14:41:05,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:41:05,890 INFO L85 PathProgramCache]: Analyzing trace with hash 1628011223, now seen corresponding path program 55 times [2022-02-15 14:41:05,890 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:41:05,890 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [343745214] [2022-02-15 14:41:05,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:41:05,890 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:41:05,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:41:06,102 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:41:06,102 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:41:06,102 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [343745214] [2022-02-15 14:41:06,102 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [343745214] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:41:06,102 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [619796443] [2022-02-15 14:41:06,102 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-15 14:41:06,102 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:41:06,102 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:41:06,104 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) [2022-02-15 14:41:06,104 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2022-02-15 14:41:06,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:41:06,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-15 14:41:06,129 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:41:06,536 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:41:06,536 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:41:06,995 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:41:06,995 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [619796443] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:41:06,995 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:41:06,995 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 24 [2022-02-15 14:41:06,995 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644817210] [2022-02-15 14:41:06,995 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:41:06,995 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-15 14:41:06,996 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:41:06,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-15 14:41:06,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=503, Unknown=0, NotChecked=0, Total=600 [2022-02-15 14:41:06,996 INFO L87 Difference]: Start difference. First operand 1900 states and 5536 transitions. Second operand has 25 states, 25 states have (on average 2.92) internal successors, (73), 24 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:41:08,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:41:08,342 INFO L93 Difference]: Finished difference Result 3262 states and 9418 transitions. [2022-02-15 14:41:08,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-02-15 14:41:08,342 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.92) internal successors, (73), 24 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-02-15 14:41:08,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:41:08,347 INFO L225 Difference]: With dead ends: 3262 [2022-02-15 14:41:08,348 INFO L226 Difference]: Without dead ends: 3243 [2022-02-15 14:41:08,348 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 47 SyntacticMatches, 5 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 689 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=355, Invalid=1901, Unknown=0, NotChecked=0, Total=2256 [2022-02-15 14:41:08,348 INFO L933 BasicCegarLoop]: 126 mSDtfsCounter, 471 mSDsluCounter, 2091 mSDsCounter, 0 mSdLazyCounter, 1674 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 471 SdHoareTripleChecker+Valid, 1464 SdHoareTripleChecker+Invalid, 1728 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 1674 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-15 14:41:08,348 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [471 Valid, 1464 Invalid, 1728 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 1674 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-15 14:41:08,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3243 states. [2022-02-15 14:41:08,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3243 to 1908. [2022-02-15 14:41:08,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1908 states, 1907 states have (on average 2.916622968012585) internal successors, (5562), 1907 states have internal predecessors, (5562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:41:08,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1908 states to 1908 states and 5562 transitions. [2022-02-15 14:41:08,373 INFO L78 Accepts]: Start accepts. Automaton has 1908 states and 5562 transitions. Word has length 33 [2022-02-15 14:41:08,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:41:08,373 INFO L470 AbstractCegarLoop]: Abstraction has 1908 states and 5562 transitions. [2022-02-15 14:41:08,373 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.92) internal successors, (73), 24 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:41:08,373 INFO L276 IsEmpty]: Start isEmpty. Operand 1908 states and 5562 transitions. [2022-02-15 14:41:08,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-02-15 14:41:08,375 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:41:08,375 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:41:08,393 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Forceful destruction successful, exit code 0 [2022-02-15 14:41:08,589 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:41:08,589 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 14:41:08,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:41:08,589 INFO L85 PathProgramCache]: Analyzing trace with hash -1790773609, now seen corresponding path program 56 times [2022-02-15 14:41:08,589 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:41:08,589 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [923623348] [2022-02-15 14:41:08,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:41:08,590 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:41:08,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:41:08,788 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:41:08,789 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:41:08,789 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [923623348] [2022-02-15 14:41:08,789 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [923623348] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:41:08,789 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [252092152] [2022-02-15 14:41:08,789 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-15 14:41:08,789 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:41:08,789 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:41:08,790 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) [2022-02-15 14:41:08,791 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2022-02-15 14:41:08,815 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-15 14:41:08,815 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:41:08,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 25 conjunts are in the unsatisfiable core [2022-02-15 14:41:08,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:41:08,991 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 5 treesize of output 3 [2022-02-15 14:41:09,269 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:41:09,269 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:41:09,752 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:41:09,752 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [252092152] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:41:09,752 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:41:09,752 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 26 [2022-02-15 14:41:09,753 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [159814696] [2022-02-15 14:41:09,753 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:41:09,755 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-15 14:41:09,755 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:41:09,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-15 14:41:09,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=587, Unknown=0, NotChecked=0, Total=702 [2022-02-15 14:41:09,755 INFO L87 Difference]: Start difference. First operand 1908 states and 5562 transitions. Second operand has 27 states, 27 states have (on average 3.185185185185185) internal successors, (86), 26 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:41:11,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:41:11,535 INFO L93 Difference]: Finished difference Result 2917 states and 8390 transitions. [2022-02-15 14:41:11,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-02-15 14:41:11,535 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 3.185185185185185) internal successors, (86), 26 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-02-15 14:41:11,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:41:11,540 INFO L225 Difference]: With dead ends: 2917 [2022-02-15 14:41:11,540 INFO L226 Difference]: Without dead ends: 2887 [2022-02-15 14:41:11,540 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 44 SyntacticMatches, 6 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 889 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=468, Invalid=2394, Unknown=0, NotChecked=0, Total=2862 [2022-02-15 14:41:11,540 INFO L933 BasicCegarLoop]: 131 mSDtfsCounter, 470 mSDsluCounter, 2577 mSDsCounter, 0 mSdLazyCounter, 2035 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 470 SdHoareTripleChecker+Valid, 1791 SdHoareTripleChecker+Invalid, 2096 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 2035 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-15 14:41:11,541 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [470 Valid, 1791 Invalid, 2096 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 2035 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-15 14:41:11,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2887 states. [2022-02-15 14:41:11,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2887 to 1900. [2022-02-15 14:41:11,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1900 states, 1899 states have (on average 2.9152185360716167) internal successors, (5536), 1899 states have internal predecessors, (5536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:41:11,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1900 states to 1900 states and 5536 transitions. [2022-02-15 14:41:11,569 INFO L78 Accepts]: Start accepts. Automaton has 1900 states and 5536 transitions. Word has length 33 [2022-02-15 14:41:11,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:41:11,569 INFO L470 AbstractCegarLoop]: Abstraction has 1900 states and 5536 transitions. [2022-02-15 14:41:11,569 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 3.185185185185185) internal successors, (86), 26 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:41:11,569 INFO L276 IsEmpty]: Start isEmpty. Operand 1900 states and 5536 transitions. [2022-02-15 14:41:11,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-02-15 14:41:11,572 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:41:11,572 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:41:11,588 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Forceful destruction successful, exit code 0 [2022-02-15 14:41:11,775 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58,57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:41:11,775 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 14:41:11,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:41:11,776 INFO L85 PathProgramCache]: Analyzing trace with hash -516801493, now seen corresponding path program 57 times [2022-02-15 14:41:11,776 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:41:11,776 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1779288423] [2022-02-15 14:41:11,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:41:11,776 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:41:11,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:41:11,954 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:41:11,954 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:41:11,954 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1779288423] [2022-02-15 14:41:11,954 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1779288423] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:41:11,954 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [129383492] [2022-02-15 14:41:11,954 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-15 14:41:11,954 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:41:11,955 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:41:11,955 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) [2022-02-15 14:41:11,956 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2022-02-15 14:41:11,978 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-02-15 14:41:11,979 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:41:11,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 25 conjunts are in the unsatisfiable core [2022-02-15 14:41:11,980 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:41:12,154 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-02-15 14:41:12,413 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:41:12,413 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:41:12,889 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:41:12,889 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [129383492] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:41:12,889 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:41:12,889 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 26 [2022-02-15 14:41:12,889 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [659269701] [2022-02-15 14:41:12,889 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:41:12,890 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-15 14:41:12,890 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:41:12,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-15 14:41:12,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=587, Unknown=0, NotChecked=0, Total=702 [2022-02-15 14:41:12,890 INFO L87 Difference]: Start difference. First operand 1900 states and 5536 transitions. Second operand has 27 states, 27 states have (on average 3.2222222222222223) internal successors, (87), 26 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:41:14,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:41:14,543 INFO L93 Difference]: Finished difference Result 3064 states and 8742 transitions. [2022-02-15 14:41:14,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-02-15 14:41:14,543 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 3.2222222222222223) internal successors, (87), 26 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-02-15 14:41:14,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:41:14,547 INFO L225 Difference]: With dead ends: 3064 [2022-02-15 14:41:14,548 INFO L226 Difference]: Without dead ends: 3034 [2022-02-15 14:41:14,548 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 44 SyntacticMatches, 6 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 889 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=468, Invalid=2394, Unknown=0, NotChecked=0, Total=2862 [2022-02-15 14:41:14,548 INFO L933 BasicCegarLoop]: 129 mSDtfsCounter, 570 mSDsluCounter, 2110 mSDsCounter, 0 mSdLazyCounter, 1620 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 570 SdHoareTripleChecker+Valid, 1448 SdHoareTripleChecker+Invalid, 1685 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 1620 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-15 14:41:14,548 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [570 Valid, 1448 Invalid, 1685 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 1620 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-15 14:41:14,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3034 states. [2022-02-15 14:41:14,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3034 to 1942. [2022-02-15 14:41:14,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1942 states, 1941 states have (on average 2.9206594538897477) internal successors, (5669), 1941 states have internal predecessors, (5669), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:41:14,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1942 states to 1942 states and 5669 transitions. [2022-02-15 14:41:14,574 INFO L78 Accepts]: Start accepts. Automaton has 1942 states and 5669 transitions. Word has length 33 [2022-02-15 14:41:14,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:41:14,574 INFO L470 AbstractCegarLoop]: Abstraction has 1942 states and 5669 transitions. [2022-02-15 14:41:14,574 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 3.2222222222222223) internal successors, (87), 26 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:41:14,575 INFO L276 IsEmpty]: Start isEmpty. Operand 1942 states and 5669 transitions. [2022-02-15 14:41:14,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-02-15 14:41:14,577 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:41:14,577 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:41:14,592 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Ended with exit code 0 [2022-02-15 14:41:14,777 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2022-02-15 14:41:14,777 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 14:41:14,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:41:14,778 INFO L85 PathProgramCache]: Analyzing trace with hash 2111767217, now seen corresponding path program 58 times [2022-02-15 14:41:14,778 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:41:14,778 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2032646562] [2022-02-15 14:41:14,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:41:14,778 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:41:14,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:41:14,995 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:41:14,995 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:41:14,995 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2032646562] [2022-02-15 14:41:14,995 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2032646562] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:41:14,995 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1885087809] [2022-02-15 14:41:14,995 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-15 14:41:14,995 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:41:14,996 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:41:15,000 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) [2022-02-15 14:41:15,000 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2022-02-15 14:41:15,023 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-15 14:41:15,024 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:41:15,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-15 14:41:15,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:41:15,357 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:41:15,357 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:41:15,808 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:41:15,809 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1885087809] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:41:15,809 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:41:15,809 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 24 [2022-02-15 14:41:15,809 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [449223023] [2022-02-15 14:41:15,809 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:41:15,809 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-15 14:41:15,809 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:41:15,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-15 14:41:15,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=503, Unknown=0, NotChecked=0, Total=600 [2022-02-15 14:41:15,810 INFO L87 Difference]: Start difference. First operand 1942 states and 5669 transitions. Second operand has 25 states, 25 states have (on average 2.96) internal successors, (74), 24 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) [2022-02-15 14:41:17,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:41:17,052 INFO L93 Difference]: Finished difference Result 3338 states and 9597 transitions. [2022-02-15 14:41:17,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-02-15 14:41:17,053 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.96) internal successors, (74), 24 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-02-15 14:41:17,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:41:17,058 INFO L225 Difference]: With dead ends: 3338 [2022-02-15 14:41:17,058 INFO L226 Difference]: Without dead ends: 3323 [2022-02-15 14:41:17,058 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 47 SyntacticMatches, 5 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 662 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=342, Invalid=1820, Unknown=0, NotChecked=0, Total=2162 [2022-02-15 14:41:17,058 INFO L933 BasicCegarLoop]: 127 mSDtfsCounter, 449 mSDsluCounter, 1858 mSDsCounter, 0 mSdLazyCounter, 1444 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 449 SdHoareTripleChecker+Valid, 1292 SdHoareTripleChecker+Invalid, 1489 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 1444 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-15 14:41:17,058 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [449 Valid, 1292 Invalid, 1489 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 1444 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-15 14:41:17,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3323 states. [2022-02-15 14:41:17,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3323 to 1889. [2022-02-15 14:41:17,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1889 states, 1888 states have (on average 2.9152542372881354) internal successors, (5504), 1888 states have internal predecessors, (5504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:41:17,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1889 states to 1889 states and 5504 transitions. [2022-02-15 14:41:17,083 INFO L78 Accepts]: Start accepts. Automaton has 1889 states and 5504 transitions. Word has length 33 [2022-02-15 14:41:17,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:41:17,083 INFO L470 AbstractCegarLoop]: Abstraction has 1889 states and 5504 transitions. [2022-02-15 14:41:17,083 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.96) internal successors, (74), 24 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) [2022-02-15 14:41:17,084 INFO L276 IsEmpty]: Start isEmpty. Operand 1889 states and 5504 transitions. [2022-02-15 14:41:17,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-02-15 14:41:17,086 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:41:17,086 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:41:17,101 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Forceful destruction successful, exit code 0 [2022-02-15 14:41:17,286 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable60 [2022-02-15 14:41:17,286 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 14:41:17,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:41:17,286 INFO L85 PathProgramCache]: Analyzing trace with hash 689886501, now seen corresponding path program 59 times [2022-02-15 14:41:17,286 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:41:17,287 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [238233498] [2022-02-15 14:41:17,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:41:17,287 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:41:17,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:41:17,460 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:41:17,460 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:41:17,460 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [238233498] [2022-02-15 14:41:17,460 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [238233498] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:41:17,460 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1289243489] [2022-02-15 14:41:17,460 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-15 14:41:17,461 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:41:17,461 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:41:17,461 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) [2022-02-15 14:41:17,462 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2022-02-15 14:41:17,485 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-15 14:41:17,485 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:41:17,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-15 14:41:17,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:41:17,846 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:41:17,846 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:41:18,293 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:41:18,294 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1289243489] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:41:18,294 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:41:18,294 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 24 [2022-02-15 14:41:18,294 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1578952794] [2022-02-15 14:41:18,294 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:41:18,294 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-15 14:41:18,294 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:41:18,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-15 14:41:18,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=503, Unknown=0, NotChecked=0, Total=600 [2022-02-15 14:41:18,295 INFO L87 Difference]: Start difference. First operand 1889 states and 5504 transitions. Second operand has 25 states, 25 states have (on average 2.92) internal successors, (73), 24 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:41:19,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:41:19,787 INFO L93 Difference]: Finished difference Result 3761 states and 10682 transitions. [2022-02-15 14:41:19,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-02-15 14:41:19,788 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.92) internal successors, (73), 24 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-02-15 14:41:19,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:41:19,793 INFO L225 Difference]: With dead ends: 3761 [2022-02-15 14:41:19,793 INFO L226 Difference]: Without dead ends: 3742 [2022-02-15 14:41:19,793 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 47 SyntacticMatches, 5 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 826 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=396, Invalid=2256, Unknown=0, NotChecked=0, Total=2652 [2022-02-15 14:41:19,794 INFO L933 BasicCegarLoop]: 132 mSDtfsCounter, 530 mSDsluCounter, 1821 mSDsCounter, 0 mSdLazyCounter, 1474 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 530 SdHoareTripleChecker+Valid, 1300 SdHoareTripleChecker+Invalid, 1534 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 1474 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-15 14:41:19,794 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [530 Valid, 1300 Invalid, 1534 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 1474 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-15 14:41:19,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3742 states. [2022-02-15 14:41:19,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3742 to 1893. [2022-02-15 14:41:19,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1893 states, 1892 states have (on average 2.916490486257928) internal successors, (5518), 1892 states have internal predecessors, (5518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:41:19,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1893 states to 1893 states and 5518 transitions. [2022-02-15 14:41:19,821 INFO L78 Accepts]: Start accepts. Automaton has 1893 states and 5518 transitions. Word has length 33 [2022-02-15 14:41:19,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:41:19,821 INFO L470 AbstractCegarLoop]: Abstraction has 1893 states and 5518 transitions. [2022-02-15 14:41:19,821 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.92) internal successors, (73), 24 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:41:19,822 INFO L276 IsEmpty]: Start isEmpty. Operand 1893 states and 5518 transitions. [2022-02-15 14:41:19,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-02-15 14:41:19,824 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:41:19,824 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:41:19,845 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Forceful destruction successful, exit code 0 [2022-02-15 14:41:20,045 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable61 [2022-02-15 14:41:20,045 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 14:41:20,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:41:20,046 INFO L85 PathProgramCache]: Analyzing trace with hash 1566068965, now seen corresponding path program 60 times [2022-02-15 14:41:20,046 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:41:20,046 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1164182654] [2022-02-15 14:41:20,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:41:20,046 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:41:20,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:41:20,228 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:41:20,228 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:41:20,228 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1164182654] [2022-02-15 14:41:20,228 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1164182654] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:41:20,228 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [463854251] [2022-02-15 14:41:20,228 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-15 14:41:20,229 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:41:20,229 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:41:20,229 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) [2022-02-15 14:41:20,232 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2022-02-15 14:41:20,255 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-02-15 14:41:20,255 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:41:20,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 25 conjunts are in the unsatisfiable core [2022-02-15 14:41:20,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:41:20,429 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-02-15 14:41:20,707 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:41:20,708 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:41:21,195 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:41:21,195 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [463854251] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:41:21,195 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:41:21,195 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 26 [2022-02-15 14:41:21,195 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629124762] [2022-02-15 14:41:21,195 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:41:21,195 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-15 14:41:21,195 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:41:21,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-15 14:41:21,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=587, Unknown=0, NotChecked=0, Total=702 [2022-02-15 14:41:21,196 INFO L87 Difference]: Start difference. First operand 1893 states and 5518 transitions. Second operand has 27 states, 27 states have (on average 3.185185185185185) internal successors, (86), 26 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:41:23,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:41:23,290 INFO L93 Difference]: Finished difference Result 3262 states and 9279 transitions. [2022-02-15 14:41:23,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-02-15 14:41:23,290 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 3.185185185185185) internal successors, (86), 26 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-02-15 14:41:23,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:41:23,295 INFO L225 Difference]: With dead ends: 3262 [2022-02-15 14:41:23,296 INFO L226 Difference]: Without dead ends: 3247 [2022-02-15 14:41:23,296 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 44 SyntacticMatches, 6 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1176 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=556, Invalid=3104, Unknown=0, NotChecked=0, Total=3660 [2022-02-15 14:41:23,296 INFO L933 BasicCegarLoop]: 132 mSDtfsCounter, 620 mSDsluCounter, 2286 mSDsCounter, 0 mSdLazyCounter, 1825 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 620 SdHoareTripleChecker+Valid, 1579 SdHoareTripleChecker+Invalid, 1902 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 1825 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-15 14:41:23,296 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [620 Valid, 1579 Invalid, 1902 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 1825 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-15 14:41:23,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3247 states. [2022-02-15 14:41:23,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3247 to 1881. [2022-02-15 14:41:23,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1881 states, 1880 states have (on average 2.9148936170212765) internal successors, (5480), 1880 states have internal predecessors, (5480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:41:23,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1881 states to 1881 states and 5480 transitions. [2022-02-15 14:41:23,324 INFO L78 Accepts]: Start accepts. Automaton has 1881 states and 5480 transitions. Word has length 33 [2022-02-15 14:41:23,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:41:23,324 INFO L470 AbstractCegarLoop]: Abstraction has 1881 states and 5480 transitions. [2022-02-15 14:41:23,325 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 3.185185185185185) internal successors, (86), 26 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:41:23,325 INFO L276 IsEmpty]: Start isEmpty. Operand 1881 states and 5480 transitions. [2022-02-15 14:41:23,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-02-15 14:41:23,328 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:41:23,328 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:41:23,343 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Forceful destruction successful, exit code 0 [2022-02-15 14:41:23,536 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,61 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:41:23,536 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 14:41:23,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:41:23,536 INFO L85 PathProgramCache]: Analyzing trace with hash 1694496615, now seen corresponding path program 61 times [2022-02-15 14:41:23,536 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:41:23,536 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [319850846] [2022-02-15 14:41:23,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:41:23,537 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:41:23,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:41:23,732 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:41:23,732 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:41:23,732 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [319850846] [2022-02-15 14:41:23,732 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [319850846] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:41:23,732 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2108427659] [2022-02-15 14:41:23,732 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-15 14:41:23,732 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:41:23,732 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:41:23,733 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) [2022-02-15 14:41:23,734 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2022-02-15 14:41:23,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:41:23,759 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-15 14:41:23,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:41:24,169 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:41:24,169 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:41:24,619 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:41:24,619 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2108427659] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:41:24,619 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:41:24,619 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 24 [2022-02-15 14:41:24,620 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2072006315] [2022-02-15 14:41:24,620 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:41:24,620 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-15 14:41:24,620 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:41:24,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-15 14:41:24,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=504, Unknown=0, NotChecked=0, Total=600 [2022-02-15 14:41:24,620 INFO L87 Difference]: Start difference. First operand 1881 states and 5480 transitions. Second operand has 25 states, 25 states have (on average 2.96) internal successors, (74), 24 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) [2022-02-15 14:41:26,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:41:26,417 INFO L93 Difference]: Finished difference Result 3091 states and 8783 transitions. [2022-02-15 14:41:26,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-02-15 14:41:26,417 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.96) internal successors, (74), 24 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-02-15 14:41:26,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:41:26,422 INFO L225 Difference]: With dead ends: 3091 [2022-02-15 14:41:26,422 INFO L226 Difference]: Without dead ends: 3076 [2022-02-15 14:41:26,422 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 47 SyntacticMatches, 5 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 797 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=411, Invalid=2241, Unknown=0, NotChecked=0, Total=2652 [2022-02-15 14:41:26,423 INFO L933 BasicCegarLoop]: 120 mSDtfsCounter, 469 mSDsluCounter, 2663 mSDsCounter, 0 mSdLazyCounter, 2072 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 469 SdHoareTripleChecker+Valid, 1794 SdHoareTripleChecker+Invalid, 2134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 2072 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-15 14:41:26,423 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [469 Valid, 1794 Invalid, 2134 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 2072 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-15 14:41:26,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3076 states. [2022-02-15 14:41:26,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3076 to 1902. [2022-02-15 14:41:26,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1902 states, 1901 states have (on average 2.923198316675434) internal successors, (5557), 1901 states have internal predecessors, (5557), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:41:26,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1902 states to 1902 states and 5557 transitions. [2022-02-15 14:41:26,446 INFO L78 Accepts]: Start accepts. Automaton has 1902 states and 5557 transitions. Word has length 33 [2022-02-15 14:41:26,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:41:26,446 INFO L470 AbstractCegarLoop]: Abstraction has 1902 states and 5557 transitions. [2022-02-15 14:41:26,446 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.96) internal successors, (74), 24 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) [2022-02-15 14:41:26,446 INFO L276 IsEmpty]: Start isEmpty. Operand 1902 states and 5557 transitions. [2022-02-15 14:41:26,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-02-15 14:41:26,449 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:41:26,449 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:41:26,464 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Forceful destruction successful, exit code 0 [2022-02-15 14:41:26,664 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,62 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:41:26,664 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 14:41:26,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:41:26,665 INFO L85 PathProgramCache]: Analyzing trace with hash 28098029, now seen corresponding path program 62 times [2022-02-15 14:41:26,665 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:41:26,665 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [280394420] [2022-02-15 14:41:26,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:41:26,665 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:41:26,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:41:26,839 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:41:26,839 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:41:26,839 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [280394420] [2022-02-15 14:41:26,839 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [280394420] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:41:26,839 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [901499690] [2022-02-15 14:41:26,839 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-15 14:41:26,840 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:41:26,840 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:41:26,841 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) [2022-02-15 14:41:26,849 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2022-02-15 14:41:26,872 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-15 14:41:26,872 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:41:26,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 25 conjunts are in the unsatisfiable core [2022-02-15 14:41:26,873 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:41:27,051 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-02-15 14:41:27,295 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:41:27,295 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:41:27,769 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:41:27,769 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [901499690] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:41:27,769 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:41:27,769 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 26 [2022-02-15 14:41:27,769 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [408064536] [2022-02-15 14:41:27,769 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:41:27,769 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-15 14:41:27,769 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:41:27,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-15 14:41:27,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=587, Unknown=0, NotChecked=0, Total=702 [2022-02-15 14:41:27,770 INFO L87 Difference]: Start difference. First operand 1902 states and 5557 transitions. Second operand has 27 states, 27 states have (on average 3.2222222222222223) internal successors, (87), 26 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:41:29,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:41:29,188 INFO L93 Difference]: Finished difference Result 3527 states and 10065 transitions. [2022-02-15 14:41:29,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-02-15 14:41:29,189 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 3.2222222222222223) internal successors, (87), 26 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-02-15 14:41:29,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:41:29,195 INFO L225 Difference]: With dead ends: 3527 [2022-02-15 14:41:29,195 INFO L226 Difference]: Without dead ends: 3512 [2022-02-15 14:41:29,195 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 44 SyntacticMatches, 6 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 797 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=381, Invalid=2069, Unknown=0, NotChecked=0, Total=2450 [2022-02-15 14:41:29,196 INFO L933 BasicCegarLoop]: 124 mSDtfsCounter, 522 mSDsluCounter, 2330 mSDsCounter, 0 mSdLazyCounter, 1705 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 522 SdHoareTripleChecker+Valid, 1592 SdHoareTripleChecker+Invalid, 1759 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 1705 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-15 14:41:29,196 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [522 Valid, 1592 Invalid, 1759 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 1705 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-15 14:41:29,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3512 states. [2022-02-15 14:41:29,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3512 to 1784. [2022-02-15 14:41:29,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1784 states, 1783 states have (on average 2.9209197980931014) internal successors, (5208), 1783 states have internal predecessors, (5208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:41:29,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1784 states to 1784 states and 5208 transitions. [2022-02-15 14:41:29,222 INFO L78 Accepts]: Start accepts. Automaton has 1784 states and 5208 transitions. Word has length 33 [2022-02-15 14:41:29,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:41:29,222 INFO L470 AbstractCegarLoop]: Abstraction has 1784 states and 5208 transitions. [2022-02-15 14:41:29,222 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 3.2222222222222223) internal successors, (87), 26 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:41:29,222 INFO L276 IsEmpty]: Start isEmpty. Operand 1784 states and 5208 transitions. [2022-02-15 14:41:29,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-02-15 14:41:29,224 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:41:29,224 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:41:29,239 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Forceful destruction successful, exit code 0 [2022-02-15 14:41:29,424 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2022-02-15 14:41:29,425 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 14:41:29,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:41:29,425 INFO L85 PathProgramCache]: Analyzing trace with hash 1005542603, now seen corresponding path program 63 times [2022-02-15 14:41:29,425 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:41:29,425 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [909725752] [2022-02-15 14:41:29,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:41:29,425 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:41:29,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:41:29,432 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:41:29,432 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:41:29,432 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [909725752] [2022-02-15 14:41:29,432 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [909725752] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 14:41:29,432 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 14:41:29,432 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-02-15 14:41:29,432 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2114607882] [2022-02-15 14:41:29,432 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 14:41:29,432 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-02-15 14:41:29,432 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:41:29,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-02-15 14:41:29,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-02-15 14:41:29,433 INFO L87 Difference]: Start difference. First operand 1784 states and 5208 transitions. Second operand has 3 states, 3 states have (on average 11.0) internal successors, (33), 2 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) [2022-02-15 14:41:29,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:41:29,447 INFO L93 Difference]: Finished difference Result 1474 states and 4216 transitions. [2022-02-15 14:41:29,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-02-15 14:41:29,447 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 11.0) internal successors, (33), 2 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 33 [2022-02-15 14:41:29,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:41:29,449 INFO L225 Difference]: With dead ends: 1474 [2022-02-15 14:41:29,449 INFO L226 Difference]: Without dead ends: 1474 [2022-02-15 14:41:29,449 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-02-15 14:41:29,450 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 10 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-15 14:41:29,450 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 48 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-15 14:41:29,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1474 states. [2022-02-15 14:41:29,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1474 to 1474. [2022-02-15 14:41:29,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1474 states, 1473 states have (on average 2.8621860149355056) internal successors, (4216), 1473 states have internal predecessors, (4216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:41:29,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1474 states to 1474 states and 4216 transitions. [2022-02-15 14:41:29,464 INFO L78 Accepts]: Start accepts. Automaton has 1474 states and 4216 transitions. Word has length 33 [2022-02-15 14:41:29,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:41:29,465 INFO L470 AbstractCegarLoop]: Abstraction has 1474 states and 4216 transitions. [2022-02-15 14:41:29,465 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.0) internal successors, (33), 2 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) [2022-02-15 14:41:29,465 INFO L276 IsEmpty]: Start isEmpty. Operand 1474 states and 4216 transitions. [2022-02-15 14:41:29,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-02-15 14:41:29,466 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:41:29,466 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:41:29,466 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2022-02-15 14:41:29,467 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 14:41:29,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:41:29,467 INFO L85 PathProgramCache]: Analyzing trace with hash -1645279201, now seen corresponding path program 64 times [2022-02-15 14:41:29,467 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:41:29,467 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [468397981] [2022-02-15 14:41:29,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:41:29,467 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:41:29,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:41:29,682 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:41:29,682 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:41:29,682 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [468397981] [2022-02-15 14:41:29,682 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [468397981] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:41:29,682 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1168982390] [2022-02-15 14:41:29,683 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-15 14:41:29,683 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:41:29,683 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:41:29,684 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) [2022-02-15 14:41:29,684 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2022-02-15 14:41:29,707 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-15 14:41:29,707 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:41:29,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-15 14:41:29,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:41:30,076 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:41:30,076 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:41:30,545 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:41:30,546 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1168982390] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:41:30,546 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:41:30,546 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 26 [2022-02-15 14:41:30,546 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74667871] [2022-02-15 14:41:30,546 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:41:30,546 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-15 14:41:30,546 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:41:30,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-15 14:41:30,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=583, Unknown=0, NotChecked=0, Total=702 [2022-02-15 14:41:30,546 INFO L87 Difference]: Start difference. First operand 1474 states and 4216 transitions. Second operand has 27 states, 27 states have (on average 3.2962962962962963) internal successors, (89), 26 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:41:31,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:41:31,527 INFO L93 Difference]: Finished difference Result 2806 states and 7869 transitions. [2022-02-15 14:41:31,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-02-15 14:41:31,528 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 3.2962962962962963) internal successors, (89), 26 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-02-15 14:41:31,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:41:31,531 INFO L225 Difference]: With dead ends: 2806 [2022-02-15 14:41:31,532 INFO L226 Difference]: Without dead ends: 2791 [2022-02-15 14:41:31,532 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 46 SyntacticMatches, 4 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 536 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=286, Invalid=1520, Unknown=0, NotChecked=0, Total=1806 [2022-02-15 14:41:31,532 INFO L933 BasicCegarLoop]: 115 mSDtfsCounter, 396 mSDsluCounter, 1738 mSDsCounter, 0 mSdLazyCounter, 1441 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 396 SdHoareTripleChecker+Valid, 1157 SdHoareTripleChecker+Invalid, 1473 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 1441 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-15 14:41:31,532 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [396 Valid, 1157 Invalid, 1473 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 1441 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-15 14:41:31,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2791 states. [2022-02-15 14:41:31,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2791 to 1513. [2022-02-15 14:41:31,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1513 states, 1512 states have (on average 2.8624338624338623) internal successors, (4328), 1512 states have internal predecessors, (4328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:41:31,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1513 states to 1513 states and 4328 transitions. [2022-02-15 14:41:31,556 INFO L78 Accepts]: Start accepts. Automaton has 1513 states and 4328 transitions. Word has length 33 [2022-02-15 14:41:31,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:41:31,556 INFO L470 AbstractCegarLoop]: Abstraction has 1513 states and 4328 transitions. [2022-02-15 14:41:31,556 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 3.2962962962962963) internal successors, (89), 26 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:41:31,556 INFO L276 IsEmpty]: Start isEmpty. Operand 1513 states and 4328 transitions. [2022-02-15 14:41:31,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-02-15 14:41:31,557 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:41:31,557 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:41:31,575 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Forceful destruction successful, exit code 0 [2022-02-15 14:41:31,758 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2022-02-15 14:41:31,758 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 14:41:31,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:41:31,758 INFO L85 PathProgramCache]: Analyzing trace with hash 1880955999, now seen corresponding path program 65 times [2022-02-15 14:41:31,758 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:41:31,758 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1302428331] [2022-02-15 14:41:31,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:41:31,758 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:41:31,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:41:31,937 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:41:31,937 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:41:31,937 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1302428331] [2022-02-15 14:41:31,937 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1302428331] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:41:31,937 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [989441437] [2022-02-15 14:41:31,937 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-15 14:41:31,937 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:41:31,937 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:41:31,938 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) [2022-02-15 14:41:31,940 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2022-02-15 14:41:31,963 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-15 14:41:31,963 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:41:31,964 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-15 14:41:31,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:41:32,304 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:41:32,304 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:41:32,727 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:41:32,727 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [989441437] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:41:32,727 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:41:32,727 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 25 [2022-02-15 14:41:32,727 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2093400630] [2022-02-15 14:41:32,727 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:41:32,727 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-15 14:41:32,727 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:41:32,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-15 14:41:32,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=541, Unknown=0, NotChecked=0, Total=650 [2022-02-15 14:41:32,728 INFO L87 Difference]: Start difference. First operand 1513 states and 4328 transitions. Second operand has 26 states, 26 states have (on average 3.1923076923076925) internal successors, (83), 25 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:41:33,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:41:33,833 INFO L93 Difference]: Finished difference Result 2697 states and 7578 transitions. [2022-02-15 14:41:33,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-02-15 14:41:33,833 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 3.1923076923076925) internal successors, (83), 25 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-02-15 14:41:33,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:41:33,838 INFO L225 Difference]: With dead ends: 2697 [2022-02-15 14:41:33,838 INFO L226 Difference]: Without dead ends: 2678 [2022-02-15 14:41:33,838 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 47 SyntacticMatches, 4 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 526 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=275, Invalid=1447, Unknown=0, NotChecked=0, Total=1722 [2022-02-15 14:41:33,838 INFO L933 BasicCegarLoop]: 122 mSDtfsCounter, 340 mSDsluCounter, 1883 mSDsCounter, 0 mSdLazyCounter, 1604 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 340 SdHoareTripleChecker+Valid, 1306 SdHoareTripleChecker+Invalid, 1642 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 1604 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-15 14:41:33,838 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [340 Valid, 1306 Invalid, 1642 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 1604 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-15 14:41:33,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2678 states. [2022-02-15 14:41:33,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2678 to 1525. [2022-02-15 14:41:33,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1525 states, 1524 states have (on average 2.8648293963254594) internal successors, (4366), 1524 states have internal predecessors, (4366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:41:33,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1525 states to 1525 states and 4366 transitions. [2022-02-15 14:41:33,861 INFO L78 Accepts]: Start accepts. Automaton has 1525 states and 4366 transitions. Word has length 33 [2022-02-15 14:41:33,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:41:33,861 INFO L470 AbstractCegarLoop]: Abstraction has 1525 states and 4366 transitions. [2022-02-15 14:41:33,861 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 3.1923076923076925) internal successors, (83), 25 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:41:33,861 INFO L276 IsEmpty]: Start isEmpty. Operand 1525 states and 4366 transitions. [2022-02-15 14:41:33,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-02-15 14:41:33,862 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:41:33,862 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:41:33,878 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Forceful destruction successful, exit code 0 [2022-02-15 14:41:34,070 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67,65 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:41:34,071 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 14:41:34,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:41:34,071 INFO L85 PathProgramCache]: Analyzing trace with hash -1537828833, now seen corresponding path program 66 times [2022-02-15 14:41:34,071 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:41:34,071 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1752657601] [2022-02-15 14:41:34,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:41:34,071 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:41:34,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:41:34,267 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:41:34,267 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:41:34,267 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1752657601] [2022-02-15 14:41:34,267 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1752657601] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:41:34,268 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1576768766] [2022-02-15 14:41:34,268 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-15 14:41:34,268 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:41:34,268 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:41:34,269 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) [2022-02-15 14:41:34,269 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2022-02-15 14:41:34,293 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-02-15 14:41:34,293 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:41:34,293 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 25 conjunts are in the unsatisfiable core [2022-02-15 14:41:34,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:41:34,499 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-02-15 14:41:34,713 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:41:34,713 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:41:35,160 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:41:35,160 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1576768766] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:41:35,160 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:41:35,160 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 22 [2022-02-15 14:41:35,160 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766562239] [2022-02-15 14:41:35,160 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:41:35,160 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-02-15 14:41:35,160 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:41:35,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-02-15 14:41:35,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2022-02-15 14:41:35,161 INFO L87 Difference]: Start difference. First operand 1525 states and 4366 transitions. Second operand has 23 states, 23 states have (on average 3.0434782608695654) internal successors, (70), 22 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:41:36,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:41:36,475 INFO L93 Difference]: Finished difference Result 2359 states and 6606 transitions. [2022-02-15 14:41:36,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-02-15 14:41:36,475 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.0434782608695654) internal successors, (70), 22 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-02-15 14:41:36,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:41:36,479 INFO L225 Difference]: With dead ends: 2359 [2022-02-15 14:41:36,479 INFO L226 Difference]: Without dead ends: 2344 [2022-02-15 14:41:36,479 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 44 SyntacticMatches, 10 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 472 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=264, Invalid=1376, Unknown=0, NotChecked=0, Total=1640 [2022-02-15 14:41:36,480 INFO L933 BasicCegarLoop]: 125 mSDtfsCounter, 360 mSDsluCounter, 1884 mSDsCounter, 0 mSdLazyCounter, 1637 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 360 SdHoareTripleChecker+Valid, 1297 SdHoareTripleChecker+Invalid, 1680 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 1637 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-15 14:41:36,480 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [360 Valid, 1297 Invalid, 1680 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 1637 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-15 14:41:36,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2344 states. [2022-02-15 14:41:36,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2344 to 1521. [2022-02-15 14:41:36,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1521 states, 1520 states have (on average 2.863157894736842) internal successors, (4352), 1520 states have internal predecessors, (4352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:41:36,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1521 states to 1521 states and 4352 transitions. [2022-02-15 14:41:36,499 INFO L78 Accepts]: Start accepts. Automaton has 1521 states and 4352 transitions. Word has length 33 [2022-02-15 14:41:36,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:41:36,499 INFO L470 AbstractCegarLoop]: Abstraction has 1521 states and 4352 transitions. [2022-02-15 14:41:36,499 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.0434782608695654) internal successors, (70), 22 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:41:36,499 INFO L276 IsEmpty]: Start isEmpty. Operand 1521 states and 4352 transitions. [2022-02-15 14:41:36,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-02-15 14:41:36,501 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:41:36,501 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:41:36,519 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Forceful destruction successful, exit code 0 [2022-02-15 14:41:36,716 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2022-02-15 14:41:36,717 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 14:41:36,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:41:36,717 INFO L85 PathProgramCache]: Analyzing trace with hash 2022671139, now seen corresponding path program 67 times [2022-02-15 14:41:36,717 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:41:36,717 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [546709995] [2022-02-15 14:41:36,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:41:36,717 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:41:36,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:41:36,930 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:41:36,930 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:41:36,930 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [546709995] [2022-02-15 14:41:36,930 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [546709995] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:41:36,930 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [429795944] [2022-02-15 14:41:36,930 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-15 14:41:36,930 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:41:36,931 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:41:36,931 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) [2022-02-15 14:41:36,932 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2022-02-15 14:41:36,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:41:36,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-15 14:41:36,958 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:41:37,350 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:41:37,350 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:41:37,781 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:41:37,781 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [429795944] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:41:37,781 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:41:37,781 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 26 [2022-02-15 14:41:37,781 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [832780649] [2022-02-15 14:41:37,781 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:41:37,781 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-15 14:41:37,781 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:41:37,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-15 14:41:37,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=582, Unknown=0, NotChecked=0, Total=702 [2022-02-15 14:41:37,782 INFO L87 Difference]: Start difference. First operand 1521 states and 4352 transitions. Second operand has 27 states, 27 states have (on average 3.1481481481481484) internal successors, (85), 26 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) [2022-02-15 14:41:38,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:41:38,786 INFO L93 Difference]: Finished difference Result 3128 states and 8721 transitions. [2022-02-15 14:41:38,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-02-15 14:41:38,786 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 3.1481481481481484) internal successors, (85), 26 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) Word has length 33 [2022-02-15 14:41:38,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:41:38,790 INFO L225 Difference]: With dead ends: 3128 [2022-02-15 14:41:38,790 INFO L226 Difference]: Without dead ends: 3098 [2022-02-15 14:41:38,791 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 48 SyntacticMatches, 5 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 644 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=312, Invalid=1668, Unknown=0, NotChecked=0, Total=1980 [2022-02-15 14:41:38,791 INFO L933 BasicCegarLoop]: 117 mSDtfsCounter, 462 mSDsluCounter, 1759 mSDsCounter, 0 mSdLazyCounter, 1252 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 462 SdHoareTripleChecker+Valid, 1219 SdHoareTripleChecker+Invalid, 1445 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 1252 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 164 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-15 14:41:38,791 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [462 Valid, 1219 Invalid, 1445 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 1252 Invalid, 0 Unknown, 164 Unchecked, 0.5s Time] [2022-02-15 14:41:38,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3098 states. [2022-02-15 14:41:38,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3098 to 1527. [2022-02-15 14:41:38,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1527 states, 1526 states have (on average 2.8636959370904327) internal successors, (4370), 1526 states have internal predecessors, (4370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:41:38,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1527 states to 1527 states and 4370 transitions. [2022-02-15 14:41:38,812 INFO L78 Accepts]: Start accepts. Automaton has 1527 states and 4370 transitions. Word has length 33 [2022-02-15 14:41:38,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:41:38,812 INFO L470 AbstractCegarLoop]: Abstraction has 1527 states and 4370 transitions. [2022-02-15 14:41:38,813 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 3.1481481481481484) internal successors, (85), 26 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) [2022-02-15 14:41:38,813 INFO L276 IsEmpty]: Start isEmpty. Operand 1527 states and 4370 transitions. [2022-02-15 14:41:38,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-02-15 14:41:38,814 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:41:38,814 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:41:38,830 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Forceful destruction successful, exit code 0 [2022-02-15 14:41:39,014 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2022-02-15 14:41:39,015 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 14:41:39,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:41:39,015 INFO L85 PathProgramCache]: Analyzing trace with hash 739523679, now seen corresponding path program 68 times [2022-02-15 14:41:39,015 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:41:39,015 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [605196273] [2022-02-15 14:41:39,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:41:39,015 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:41:39,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:41:39,217 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:41:39,217 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:41:39,217 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [605196273] [2022-02-15 14:41:39,217 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [605196273] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:41:39,217 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1873086443] [2022-02-15 14:41:39,217 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-15 14:41:39,217 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:41:39,217 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:41:39,218 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) [2022-02-15 14:41:39,219 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2022-02-15 14:41:39,242 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-15 14:41:39,242 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:41:39,243 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 25 conjunts are in the unsatisfiable core [2022-02-15 14:41:39,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:41:39,438 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-02-15 14:41:39,626 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:41:39,626 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:41:40,082 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:41:40,082 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1873086443] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:41:40,082 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:41:40,082 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 23 [2022-02-15 14:41:40,082 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1743461532] [2022-02-15 14:41:40,082 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:41:40,082 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-02-15 14:41:40,082 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:41:40,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-02-15 14:41:40,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=459, Unknown=0, NotChecked=0, Total=552 [2022-02-15 14:41:40,083 INFO L87 Difference]: Start difference. First operand 1527 states and 4370 transitions. Second operand has 24 states, 24 states have (on average 3.0) internal successors, (72), 23 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:41:41,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:41:41,508 INFO L93 Difference]: Finished difference Result 3264 states and 9075 transitions. [2022-02-15 14:41:41,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-02-15 14:41:41,509 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 3.0) internal successors, (72), 23 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-02-15 14:41:41,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:41:41,513 INFO L225 Difference]: With dead ends: 3264 [2022-02-15 14:41:41,513 INFO L226 Difference]: Without dead ends: 3249 [2022-02-15 14:41:41,514 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 44 SyntacticMatches, 9 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 547 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=276, Invalid=1530, Unknown=0, NotChecked=0, Total=1806 [2022-02-15 14:41:41,514 INFO L933 BasicCegarLoop]: 131 mSDtfsCounter, 380 mSDsluCounter, 2658 mSDsCounter, 0 mSdLazyCounter, 2163 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 380 SdHoareTripleChecker+Valid, 1739 SdHoareTripleChecker+Invalid, 2204 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 2163 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-15 14:41:41,514 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [380 Valid, 1739 Invalid, 2204 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 2163 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-15 14:41:41,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3249 states. [2022-02-15 14:41:41,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3249 to 1507. [2022-02-15 14:41:41,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1507 states, 1506 states have (on average 2.861885790172643) internal successors, (4310), 1506 states have internal predecessors, (4310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:41:41,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1507 states to 1507 states and 4310 transitions. [2022-02-15 14:41:41,536 INFO L78 Accepts]: Start accepts. Automaton has 1507 states and 4310 transitions. Word has length 33 [2022-02-15 14:41:41,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:41:41,536 INFO L470 AbstractCegarLoop]: Abstraction has 1507 states and 4310 transitions. [2022-02-15 14:41:41,536 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 3.0) internal successors, (72), 23 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:41:41,536 INFO L276 IsEmpty]: Start isEmpty. Operand 1507 states and 4310 transitions. [2022-02-15 14:41:41,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-02-15 14:41:41,538 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:41:41,538 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:41:41,554 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Forceful destruction successful, exit code 0 [2022-02-15 14:41:41,738 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,68 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:41:41,738 INFO L402 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 14:41:41,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:41:41,739 INFO L85 PathProgramCache]: Analyzing trace with hash 1023104835, now seen corresponding path program 69 times [2022-02-15 14:41:41,739 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:41:41,739 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [437028099] [2022-02-15 14:41:41,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:41:41,739 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:41:41,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:41:41,926 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:41:41,926 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:41:41,926 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [437028099] [2022-02-15 14:41:41,926 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [437028099] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:41:41,926 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [743780371] [2022-02-15 14:41:41,927 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-15 14:41:41,927 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:41:41,927 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:41:41,929 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) [2022-02-15 14:41:41,930 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2022-02-15 14:41:41,953 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-02-15 14:41:41,953 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:41:41,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 22 conjunts are in the unsatisfiable core [2022-02-15 14:41:41,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:41:42,331 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:41:42,331 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:41:42,794 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:41:42,794 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [743780371] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:41:42,794 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:41:42,794 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 23 [2022-02-15 14:41:42,794 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [788335600] [2022-02-15 14:41:42,794 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:41:42,794 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-02-15 14:41:42,794 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:41:42,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-02-15 14:41:42,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=455, Unknown=0, NotChecked=0, Total=552 [2022-02-15 14:41:42,795 INFO L87 Difference]: Start difference. First operand 1507 states and 4310 transitions. Second operand has 24 states, 24 states have (on average 2.9583333333333335) internal successors, (71), 23 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:41:43,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:41:43,651 INFO L93 Difference]: Finished difference Result 2822 states and 7897 transitions. [2022-02-15 14:41:43,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-02-15 14:41:43,651 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.9583333333333335) internal successors, (71), 23 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-02-15 14:41:43,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:41:43,655 INFO L225 Difference]: With dead ends: 2822 [2022-02-15 14:41:43,655 INFO L226 Difference]: Without dead ends: 2807 [2022-02-15 14:41:43,656 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 47 SyntacticMatches, 6 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 450 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=243, Invalid=1239, Unknown=0, NotChecked=0, Total=1482 [2022-02-15 14:41:43,656 INFO L933 BasicCegarLoop]: 114 mSDtfsCounter, 394 mSDsluCounter, 1363 mSDsCounter, 0 mSdLazyCounter, 1178 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 394 SdHoareTripleChecker+Valid, 928 SdHoareTripleChecker+Invalid, 1206 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 1178 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-15 14:41:43,656 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [394 Valid, 928 Invalid, 1206 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 1178 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-15 14:41:43,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2807 states. [2022-02-15 14:41:43,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2807 to 1576. [2022-02-15 14:41:43,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1576 states, 1575 states have (on average 2.843809523809524) internal successors, (4479), 1575 states have internal predecessors, (4479), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:41:43,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1576 states to 1576 states and 4479 transitions. [2022-02-15 14:41:43,677 INFO L78 Accepts]: Start accepts. Automaton has 1576 states and 4479 transitions. Word has length 33 [2022-02-15 14:41:43,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:41:43,677 INFO L470 AbstractCegarLoop]: Abstraction has 1576 states and 4479 transitions. [2022-02-15 14:41:43,677 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.9583333333333335) internal successors, (71), 23 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:41:43,677 INFO L276 IsEmpty]: Start isEmpty. Operand 1576 states and 4479 transitions. [2022-02-15 14:41:43,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-02-15 14:41:43,679 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:41:43,679 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:41:43,694 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Forceful destruction successful, exit code 0 [2022-02-15 14:41:43,879 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable71 [2022-02-15 14:41:43,879 INFO L402 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 14:41:43,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:41:43,880 INFO L85 PathProgramCache]: Analyzing trace with hash 987471787, now seen corresponding path program 70 times [2022-02-15 14:41:43,880 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:41:43,880 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [594553840] [2022-02-15 14:41:43,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:41:43,880 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:41:43,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:41:44,069 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:41:44,070 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:41:44,070 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [594553840] [2022-02-15 14:41:44,070 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [594553840] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:41:44,070 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [160836553] [2022-02-15 14:41:44,070 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-15 14:41:44,070 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:41:44,070 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:41:44,071 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) [2022-02-15 14:41:44,071 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Waiting until timeout for monitored process [2022-02-15 14:41:44,095 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-15 14:41:44,095 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:41:44,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-15 14:41:44,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:41:44,475 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:41:44,475 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:41:44,911 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:41:44,911 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [160836553] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:41:44,911 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:41:44,911 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 25 [2022-02-15 14:41:44,911 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1195825965] [2022-02-15 14:41:44,912 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:41:44,912 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-15 14:41:44,912 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:41:44,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-15 14:41:44,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=542, Unknown=0, NotChecked=0, Total=650 [2022-02-15 14:41:44,912 INFO L87 Difference]: Start difference. First operand 1576 states and 4479 transitions. Second operand has 26 states, 26 states have (on average 3.269230769230769) internal successors, (85), 25 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) [2022-02-15 14:41:46,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:41:46,110 INFO L93 Difference]: Finished difference Result 2350 states and 6557 transitions. [2022-02-15 14:41:46,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-02-15 14:41:46,110 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 3.269230769230769) internal successors, (85), 25 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) Word has length 33 [2022-02-15 14:41:46,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:41:46,113 INFO L225 Difference]: With dead ends: 2350 [2022-02-15 14:41:46,113 INFO L226 Difference]: Without dead ends: 2335 [2022-02-15 14:41:46,114 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 47 SyntacticMatches, 4 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 559 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=311, Invalid=1581, Unknown=0, NotChecked=0, Total=1892 [2022-02-15 14:41:46,117 INFO L933 BasicCegarLoop]: 115 mSDtfsCounter, 348 mSDsluCounter, 1693 mSDsCounter, 0 mSdLazyCounter, 1494 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 348 SdHoareTripleChecker+Valid, 1138 SdHoareTripleChecker+Invalid, 1533 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 1494 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-15 14:41:46,117 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [348 Valid, 1138 Invalid, 1533 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 1494 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-15 14:41:46,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2335 states. [2022-02-15 14:41:46,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2335 to 1594. [2022-02-15 14:41:46,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1594 states, 1593 states have (on average 2.8455743879472695) internal successors, (4533), 1593 states have internal predecessors, (4533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:41:46,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1594 states to 1594 states and 4533 transitions. [2022-02-15 14:41:46,137 INFO L78 Accepts]: Start accepts. Automaton has 1594 states and 4533 transitions. Word has length 33 [2022-02-15 14:41:46,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:41:46,138 INFO L470 AbstractCegarLoop]: Abstraction has 1594 states and 4533 transitions. [2022-02-15 14:41:46,138 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 3.269230769230769) internal successors, (85), 25 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) [2022-02-15 14:41:46,138 INFO L276 IsEmpty]: Start isEmpty. Operand 1594 states and 4533 transitions. [2022-02-15 14:41:46,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-02-15 14:41:46,139 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:41:46,139 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:41:46,155 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Forceful destruction successful, exit code 0 [2022-02-15 14:41:46,340 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,70 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:41:46,340 INFO L402 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 14:41:46,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:41:46,340 INFO L85 PathProgramCache]: Analyzing trace with hash 758712943, now seen corresponding path program 71 times [2022-02-15 14:41:46,340 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:41:46,340 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [896267692] [2022-02-15 14:41:46,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:41:46,340 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:41:46,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:41:46,539 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:41:46,539 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:41:46,539 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [896267692] [2022-02-15 14:41:46,540 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [896267692] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:41:46,540 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [25698023] [2022-02-15 14:41:46,540 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-15 14:41:46,540 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:41:46,540 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:41:46,543 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) [2022-02-15 14:41:46,543 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process [2022-02-15 14:41:46,577 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-15 14:41:46,577 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:41:46,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-15 14:41:46,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:41:46,918 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:41:46,918 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:41:47,332 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:41:47,333 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [25698023] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:41:47,333 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:41:47,333 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 25 [2022-02-15 14:41:47,333 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1860114142] [2022-02-15 14:41:47,333 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:41:47,333 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-15 14:41:47,333 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:41:47,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-15 14:41:47,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=541, Unknown=0, NotChecked=0, Total=650 [2022-02-15 14:41:47,333 INFO L87 Difference]: Start difference. First operand 1594 states and 4533 transitions. Second operand has 26 states, 26 states have (on average 3.269230769230769) internal successors, (85), 25 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) [2022-02-15 14:41:48,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:41:48,320 INFO L93 Difference]: Finished difference Result 2684 states and 7527 transitions. [2022-02-15 14:41:48,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-02-15 14:41:48,320 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 3.269230769230769) internal successors, (85), 25 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) Word has length 33 [2022-02-15 14:41:48,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:41:48,324 INFO L225 Difference]: With dead ends: 2684 [2022-02-15 14:41:48,324 INFO L226 Difference]: Without dead ends: 2669 [2022-02-15 14:41:48,324 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 46 SyntacticMatches, 5 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 538 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=275, Invalid=1447, Unknown=0, NotChecked=0, Total=1722 [2022-02-15 14:41:48,325 INFO L933 BasicCegarLoop]: 109 mSDtfsCounter, 344 mSDsluCounter, 1593 mSDsCounter, 0 mSdLazyCounter, 1369 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 344 SdHoareTripleChecker+Valid, 1093 SdHoareTripleChecker+Invalid, 1399 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 1369 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-15 14:41:48,325 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [344 Valid, 1093 Invalid, 1399 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 1369 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-15 14:41:48,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2669 states. [2022-02-15 14:41:48,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2669 to 1588. [2022-02-15 14:41:48,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1588 states, 1587 states have (on average 2.8424700693131695) internal successors, (4511), 1587 states have internal predecessors, (4511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:41:48,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1588 states to 1588 states and 4511 transitions. [2022-02-15 14:41:48,351 INFO L78 Accepts]: Start accepts. Automaton has 1588 states and 4511 transitions. Word has length 33 [2022-02-15 14:41:48,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:41:48,351 INFO L470 AbstractCegarLoop]: Abstraction has 1588 states and 4511 transitions. [2022-02-15 14:41:48,351 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 3.269230769230769) internal successors, (85), 25 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) [2022-02-15 14:41:48,351 INFO L276 IsEmpty]: Start isEmpty. Operand 1588 states and 4511 transitions. [2022-02-15 14:41:48,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-02-15 14:41:48,353 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:41:48,353 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:41:48,370 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Forceful destruction successful, exit code 0 [2022-02-15 14:41:48,553 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,71 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:41:48,553 INFO L402 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 14:41:48,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:41:48,554 INFO L85 PathProgramCache]: Analyzing trace with hash -188018857, now seen corresponding path program 72 times [2022-02-15 14:41:48,554 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:41:48,554 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1685051208] [2022-02-15 14:41:48,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:41:48,554 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:41:48,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:41:48,749 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:41:48,749 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:41:48,749 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1685051208] [2022-02-15 14:41:48,749 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1685051208] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:41:48,749 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1557284815] [2022-02-15 14:41:48,749 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-15 14:41:48,749 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:41:48,749 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:41:48,750 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) [2022-02-15 14:41:48,751 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Waiting until timeout for monitored process [2022-02-15 14:41:48,774 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-02-15 14:41:48,774 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:41:48,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 25 conjunts are in the unsatisfiable core [2022-02-15 14:41:48,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:41:48,956 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 5 treesize of output 3 [2022-02-15 14:41:49,164 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:41:49,164 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:41:49,617 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:41:49,618 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1557284815] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:41:49,618 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:41:49,618 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 23 [2022-02-15 14:41:49,618 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1518517853] [2022-02-15 14:41:49,618 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:41:49,618 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-02-15 14:41:49,618 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:41:49,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-02-15 14:41:49,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=459, Unknown=0, NotChecked=0, Total=552 [2022-02-15 14:41:49,619 INFO L87 Difference]: Start difference. First operand 1588 states and 4511 transitions. Second operand has 24 states, 24 states have (on average 2.9583333333333335) internal successors, (71), 23 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:41:50,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:41:50,583 INFO L93 Difference]: Finished difference Result 2841 states and 7944 transitions. [2022-02-15 14:41:50,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-02-15 14:41:50,583 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.9583333333333335) internal successors, (71), 23 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-02-15 14:41:50,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:41:50,588 INFO L225 Difference]: With dead ends: 2841 [2022-02-15 14:41:50,588 INFO L226 Difference]: Without dead ends: 2826 [2022-02-15 14:41:50,588 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 45 SyntacticMatches, 8 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 528 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=274, Invalid=1448, Unknown=0, NotChecked=0, Total=1722 [2022-02-15 14:41:50,588 INFO L933 BasicCegarLoop]: 107 mSDtfsCounter, 402 mSDsluCounter, 1347 mSDsCounter, 0 mSdLazyCounter, 1191 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 402 SdHoareTripleChecker+Valid, 937 SdHoareTripleChecker+Invalid, 1224 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 1191 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-15 14:41:50,588 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [402 Valid, 937 Invalid, 1224 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 1191 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-15 14:41:50,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2826 states. [2022-02-15 14:41:50,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2826 to 1594. [2022-02-15 14:41:50,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1594 states, 1593 states have (on average 2.84180790960452) internal successors, (4527), 1593 states have internal predecessors, (4527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:41:50,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1594 states to 1594 states and 4527 transitions. [2022-02-15 14:41:50,608 INFO L78 Accepts]: Start accepts. Automaton has 1594 states and 4527 transitions. Word has length 33 [2022-02-15 14:41:50,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:41:50,608 INFO L470 AbstractCegarLoop]: Abstraction has 1594 states and 4527 transitions. [2022-02-15 14:41:50,608 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.9583333333333335) internal successors, (71), 23 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:41:50,608 INFO L276 IsEmpty]: Start isEmpty. Operand 1594 states and 4527 transitions. [2022-02-15 14:41:50,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-02-15 14:41:50,610 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:41:50,610 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:41:50,626 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Forceful destruction successful, exit code 0 [2022-02-15 14:41:50,810 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,72 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:41:50,811 INFO L402 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 14:41:50,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:41:50,811 INFO L85 PathProgramCache]: Analyzing trace with hash -342456375, now seen corresponding path program 73 times [2022-02-15 14:41:50,811 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:41:50,811 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [860454365] [2022-02-15 14:41:50,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:41:50,812 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:41:50,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:41:50,997 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:41:50,997 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:41:50,997 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [860454365] [2022-02-15 14:41:50,997 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [860454365] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:41:50,997 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [581447070] [2022-02-15 14:41:50,997 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-15 14:41:50,997 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:41:50,998 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:41:50,998 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) [2022-02-15 14:41:50,999 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Waiting until timeout for monitored process [2022-02-15 14:41:51,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:41:51,023 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-15 14:41:51,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:41:51,377 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:41:51,377 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:41:51,832 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:41:51,832 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [581447070] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:41:51,832 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:41:51,832 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 26 [2022-02-15 14:41:51,832 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [275052141] [2022-02-15 14:41:51,832 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:41:51,832 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-15 14:41:51,832 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:41:51,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-15 14:41:51,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=582, Unknown=0, NotChecked=0, Total=702 [2022-02-15 14:41:51,833 INFO L87 Difference]: Start difference. First operand 1594 states and 4527 transitions. Second operand has 27 states, 27 states have (on average 3.185185185185185) internal successors, (86), 26 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:41:52,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:41:52,217 INFO L93 Difference]: Finished difference Result 2428 states and 6808 transitions. [2022-02-15 14:41:52,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-02-15 14:41:52,217 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 3.185185185185185) internal successors, (86), 26 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-02-15 14:41:52,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:41:52,220 INFO L225 Difference]: With dead ends: 2428 [2022-02-15 14:41:52,220 INFO L226 Difference]: Without dead ends: 2422 [2022-02-15 14:41:52,220 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 48 SyntacticMatches, 4 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 352 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=168, Invalid=762, Unknown=0, NotChecked=0, Total=930 [2022-02-15 14:41:52,220 INFO L933 BasicCegarLoop]: 87 mSDtfsCounter, 344 mSDsluCounter, 1141 mSDsCounter, 0 mSdLazyCounter, 704 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 344 SdHoareTripleChecker+Valid, 834 SdHoareTripleChecker+Invalid, 881 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 704 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 165 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 14:41:52,220 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [344 Valid, 834 Invalid, 881 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 704 Invalid, 0 Unknown, 165 Unchecked, 0.3s Time] [2022-02-15 14:41:52,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2422 states. [2022-02-15 14:41:52,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2422 to 1614. [2022-02-15 14:41:52,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1614 states, 1613 states have (on average 2.8406695598264102) internal successors, (4582), 1613 states have internal predecessors, (4582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:41:52,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1614 states to 1614 states and 4582 transitions. [2022-02-15 14:41:52,239 INFO L78 Accepts]: Start accepts. Automaton has 1614 states and 4582 transitions. Word has length 33 [2022-02-15 14:41:52,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:41:52,239 INFO L470 AbstractCegarLoop]: Abstraction has 1614 states and 4582 transitions. [2022-02-15 14:41:52,239 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 3.185185185185185) internal successors, (86), 26 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:41:52,239 INFO L276 IsEmpty]: Start isEmpty. Operand 1614 states and 4582 transitions. [2022-02-15 14:41:52,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-02-15 14:41:52,241 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:41:52,241 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:41:52,256 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Forceful destruction successful, exit code 0 [2022-02-15 14:41:52,441 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable75 [2022-02-15 14:41:52,441 INFO L402 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 14:41:52,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:41:52,442 INFO L85 PathProgramCache]: Analyzing trace with hash -712460595, now seen corresponding path program 74 times [2022-02-15 14:41:52,442 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:41:52,442 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2125759505] [2022-02-15 14:41:52,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:41:52,442 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:41:52,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:41:52,629 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:41:52,629 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:41:52,629 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2125759505] [2022-02-15 14:41:52,629 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2125759505] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:41:52,629 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [547129734] [2022-02-15 14:41:52,629 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-15 14:41:52,629 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:41:52,629 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:41:52,630 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) [2022-02-15 14:41:52,631 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Waiting until timeout for monitored process [2022-02-15 14:41:52,654 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-15 14:41:52,654 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:41:52,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 25 conjunts are in the unsatisfiable core [2022-02-15 14:41:52,655 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:41:52,839 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-02-15 14:41:53,040 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:41:53,040 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:41:53,506 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:41:53,507 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [547129734] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:41:53,507 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:41:53,507 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 23 [2022-02-15 14:41:53,507 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1014657198] [2022-02-15 14:41:53,507 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:41:53,507 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-02-15 14:41:53,507 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:41:53,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-02-15 14:41:53,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=459, Unknown=0, NotChecked=0, Total=552 [2022-02-15 14:41:53,507 INFO L87 Difference]: Start difference. First operand 1614 states and 4582 transitions. Second operand has 24 states, 24 states have (on average 2.9583333333333335) internal successors, (71), 23 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:41:54,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:41:54,713 INFO L93 Difference]: Finished difference Result 2986 states and 8329 transitions. [2022-02-15 14:41:54,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-02-15 14:41:54,714 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.9583333333333335) internal successors, (71), 23 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-02-15 14:41:54,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:41:54,718 INFO L225 Difference]: With dead ends: 2986 [2022-02-15 14:41:54,718 INFO L226 Difference]: Without dead ends: 2971 [2022-02-15 14:41:54,718 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 45 SyntacticMatches, 8 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 473 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=250, Invalid=1310, Unknown=0, NotChecked=0, Total=1560 [2022-02-15 14:41:54,719 INFO L933 BasicCegarLoop]: 116 mSDtfsCounter, 323 mSDsluCounter, 2473 mSDsCounter, 0 mSdLazyCounter, 2061 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 323 SdHoareTripleChecker+Valid, 1621 SdHoareTripleChecker+Invalid, 2091 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 2061 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-15 14:41:54,719 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [323 Valid, 1621 Invalid, 2091 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 2061 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-15 14:41:54,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2971 states. [2022-02-15 14:41:54,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2971 to 1519. [2022-02-15 14:41:54,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1519 states, 1518 states have (on average 2.86034255599473) internal successors, (4342), 1518 states have internal predecessors, (4342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:41:54,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1519 states to 1519 states and 4342 transitions. [2022-02-15 14:41:54,739 INFO L78 Accepts]: Start accepts. Automaton has 1519 states and 4342 transitions. Word has length 33 [2022-02-15 14:41:54,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:41:54,739 INFO L470 AbstractCegarLoop]: Abstraction has 1519 states and 4342 transitions. [2022-02-15 14:41:54,739 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.9583333333333335) internal successors, (71), 23 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:41:54,739 INFO L276 IsEmpty]: Start isEmpty. Operand 1519 states and 4342 transitions. [2022-02-15 14:41:54,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-02-15 14:41:54,741 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:41:54,741 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:41:54,756 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Ended with exit code 0 [2022-02-15 14:41:54,941 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,74 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:41:54,941 INFO L402 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 14:41:54,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:41:54,942 INFO L85 PathProgramCache]: Analyzing trace with hash 1552941087, now seen corresponding path program 75 times [2022-02-15 14:41:54,942 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:41:54,942 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [581056251] [2022-02-15 14:41:54,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:41:54,942 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:41:54,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:41:55,113 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:41:55,114 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:41:55,114 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [581056251] [2022-02-15 14:41:55,114 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [581056251] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:41:55,114 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [354640349] [2022-02-15 14:41:55,114 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-15 14:41:55,114 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:41:55,114 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:41:55,115 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) [2022-02-15 14:41:55,115 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Waiting until timeout for monitored process [2022-02-15 14:41:55,144 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-02-15 14:41:55,144 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:41:55,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 25 conjunts are in the unsatisfiable core [2022-02-15 14:41:55,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:41:55,335 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 5 treesize of output 3 [2022-02-15 14:41:55,607 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:41:55,607 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:41:56,048 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:41:56,048 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [354640349] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:41:56,048 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:41:56,048 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 25 [2022-02-15 14:41:56,048 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [343627970] [2022-02-15 14:41:56,048 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:41:56,048 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-15 14:41:56,048 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:41:56,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-15 14:41:56,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=540, Unknown=0, NotChecked=0, Total=650 [2022-02-15 14:41:56,049 INFO L87 Difference]: Start difference. First operand 1519 states and 4342 transitions. Second operand has 26 states, 26 states have (on average 3.269230769230769) internal successors, (85), 25 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) [2022-02-15 14:41:57,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:41:57,363 INFO L93 Difference]: Finished difference Result 2182 states and 6153 transitions. [2022-02-15 14:41:57,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-02-15 14:41:57,364 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 3.269230769230769) internal successors, (85), 25 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) Word has length 33 [2022-02-15 14:41:57,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:41:57,366 INFO L225 Difference]: With dead ends: 2182 [2022-02-15 14:41:57,366 INFO L226 Difference]: Without dead ends: 2163 [2022-02-15 14:41:57,367 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 45 SyntacticMatches, 6 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 570 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=307, Invalid=1585, Unknown=0, NotChecked=0, Total=1892 [2022-02-15 14:41:57,367 INFO L933 BasicCegarLoop]: 112 mSDtfsCounter, 326 mSDsluCounter, 1876 mSDsCounter, 0 mSdLazyCounter, 1703 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 326 SdHoareTripleChecker+Valid, 1290 SdHoareTripleChecker+Invalid, 1742 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 1703 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-15 14:41:57,367 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [326 Valid, 1290 Invalid, 1742 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 1703 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-15 14:41:57,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2163 states. [2022-02-15 14:41:57,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2163 to 1527. [2022-02-15 14:41:57,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1527 states, 1526 states have (on average 2.8636959370904327) internal successors, (4370), 1526 states have internal predecessors, (4370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:41:57,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1527 states to 1527 states and 4370 transitions. [2022-02-15 14:41:57,383 INFO L78 Accepts]: Start accepts. Automaton has 1527 states and 4370 transitions. Word has length 33 [2022-02-15 14:41:57,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:41:57,384 INFO L470 AbstractCegarLoop]: Abstraction has 1527 states and 4370 transitions. [2022-02-15 14:41:57,384 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 3.269230769230769) internal successors, (85), 25 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) [2022-02-15 14:41:57,384 INFO L276 IsEmpty]: Start isEmpty. Operand 1527 states and 4370 transitions. [2022-02-15 14:41:57,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-02-15 14:41:57,385 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:41:57,385 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:41:57,401 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Forceful destruction successful, exit code 0 [2022-02-15 14:41:57,585 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77,75 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:41:57,586 INFO L402 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 14:41:57,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:41:57,586 INFO L85 PathProgramCache]: Analyzing trace with hash -1865843745, now seen corresponding path program 76 times [2022-02-15 14:41:57,586 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:41:57,586 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2009324558] [2022-02-15 14:41:57,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:41:57,586 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:41:57,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:41:57,764 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:41:57,764 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:41:57,764 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2009324558] [2022-02-15 14:41:57,764 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2009324558] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:41:57,764 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1899998068] [2022-02-15 14:41:57,764 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-15 14:41:57,764 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:41:57,764 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:41:57,765 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) [2022-02-15 14:41:57,766 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Waiting until timeout for monitored process [2022-02-15 14:41:57,789 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-15 14:41:57,789 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:41:57,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-15 14:41:57,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:41:58,183 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:41:58,183 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:41:58,618 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:41:58,618 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1899998068] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:41:58,618 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:41:58,618 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 22 [2022-02-15 14:41:58,618 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [572746985] [2022-02-15 14:41:58,618 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:41:58,618 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-02-15 14:41:58,618 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:41:58,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-02-15 14:41:58,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2022-02-15 14:41:58,619 INFO L87 Difference]: Start difference. First operand 1527 states and 4370 transitions. Second operand has 23 states, 23 states have (on average 3.0434782608695654) internal successors, (70), 22 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:41:59,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:41:59,939 INFO L93 Difference]: Finished difference Result 2182 states and 6147 transitions. [2022-02-15 14:41:59,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-02-15 14:41:59,939 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.0434782608695654) internal successors, (70), 22 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-02-15 14:41:59,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:41:59,943 INFO L225 Difference]: With dead ends: 2182 [2022-02-15 14:41:59,943 INFO L226 Difference]: Without dead ends: 2167 [2022-02-15 14:41:59,943 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 49 SyntacticMatches, 5 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 432 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=290, Invalid=1350, Unknown=0, NotChecked=0, Total=1640 [2022-02-15 14:41:59,948 INFO L933 BasicCegarLoop]: 113 mSDtfsCounter, 357 mSDsluCounter, 1628 mSDsCounter, 0 mSdLazyCounter, 1599 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 357 SdHoareTripleChecker+Valid, 1109 SdHoareTripleChecker+Invalid, 1651 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 1599 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-15 14:41:59,948 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [357 Valid, 1109 Invalid, 1651 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 1599 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-15 14:41:59,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2167 states. [2022-02-15 14:41:59,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2167 to 1523. [2022-02-15 14:41:59,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1523 states, 1522 states have (on average 2.862023653088042) internal successors, (4356), 1522 states have internal predecessors, (4356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:41:59,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1523 states to 1523 states and 4356 transitions. [2022-02-15 14:41:59,965 INFO L78 Accepts]: Start accepts. Automaton has 1523 states and 4356 transitions. Word has length 33 [2022-02-15 14:41:59,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:41:59,965 INFO L470 AbstractCegarLoop]: Abstraction has 1523 states and 4356 transitions. [2022-02-15 14:41:59,965 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.0434782608695654) internal successors, (70), 22 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:41:59,966 INFO L276 IsEmpty]: Start isEmpty. Operand 1523 states and 4356 transitions. [2022-02-15 14:41:59,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-02-15 14:41:59,967 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:41:59,967 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:41:59,983 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Forceful destruction successful, exit code 0 [2022-02-15 14:42:00,167 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 76 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2022-02-15 14:42:00,168 INFO L402 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 14:42:00,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:42:00,168 INFO L85 PathProgramCache]: Analyzing trace with hash 325987423, now seen corresponding path program 77 times [2022-02-15 14:42:00,168 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:42:00,168 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2065481192] [2022-02-15 14:42:00,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:42:00,168 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:42:00,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:42:00,334 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:42:00,334 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:42:00,334 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2065481192] [2022-02-15 14:42:00,334 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2065481192] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:42:00,334 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1120604010] [2022-02-15 14:42:00,334 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-15 14:42:00,334 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:42:00,334 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:42:00,335 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) [2022-02-15 14:42:00,336 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Waiting until timeout for monitored process [2022-02-15 14:42:00,360 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-15 14:42:00,360 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:42:00,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-15 14:42:00,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:42:00,679 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:42:00,679 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:42:01,106 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:42:01,106 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1120604010] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:42:01,106 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:42:01,106 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 22 [2022-02-15 14:42:01,106 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1359779532] [2022-02-15 14:42:01,106 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:42:01,106 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-02-15 14:42:01,106 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:42:01,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-02-15 14:42:01,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=419, Unknown=0, NotChecked=0, Total=506 [2022-02-15 14:42:01,107 INFO L87 Difference]: Start difference. First operand 1523 states and 4356 transitions. Second operand has 23 states, 23 states have (on average 3.0434782608695654) internal successors, (70), 22 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:42:01,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:42:01,970 INFO L93 Difference]: Finished difference Result 2357 states and 6689 transitions. [2022-02-15 14:42:01,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-02-15 14:42:01,970 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.0434782608695654) internal successors, (70), 22 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-02-15 14:42:01,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:42:01,973 INFO L225 Difference]: With dead ends: 2357 [2022-02-15 14:42:01,974 INFO L226 Difference]: Without dead ends: 2338 [2022-02-15 14:42:01,974 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 49 SyntacticMatches, 5 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 365 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=218, Invalid=1042, Unknown=0, NotChecked=0, Total=1260 [2022-02-15 14:42:01,974 INFO L933 BasicCegarLoop]: 88 mSDtfsCounter, 223 mSDsluCounter, 1332 mSDsCounter, 0 mSdLazyCounter, 1330 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 223 SdHoareTripleChecker+Valid, 913 SdHoareTripleChecker+Invalid, 1359 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 1330 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-15 14:42:01,974 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [223 Valid, 913 Invalid, 1359 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 1330 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-15 14:42:01,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2338 states. [2022-02-15 14:42:01,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2338 to 1527. [2022-02-15 14:42:01,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1527 states, 1526 states have (on average 2.8610747051114025) internal successors, (4366), 1526 states have internal predecessors, (4366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:42:01,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1527 states to 1527 states and 4366 transitions. [2022-02-15 14:42:01,993 INFO L78 Accepts]: Start accepts. Automaton has 1527 states and 4366 transitions. Word has length 33 [2022-02-15 14:42:01,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:42:01,993 INFO L470 AbstractCegarLoop]: Abstraction has 1527 states and 4366 transitions. [2022-02-15 14:42:01,994 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.0434782608695654) internal successors, (70), 22 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:42:01,994 INFO L276 IsEmpty]: Start isEmpty. Operand 1527 states and 4366 transitions. [2022-02-15 14:42:01,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-02-15 14:42:01,995 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:42:01,995 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:42:02,013 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Forceful destruction successful, exit code 0 [2022-02-15 14:42:02,203 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2022-02-15 14:42:02,203 INFO L402 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 14:42:02,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:42:02,204 INFO L85 PathProgramCache]: Analyzing trace with hash -1506929981, now seen corresponding path program 78 times [2022-02-15 14:42:02,204 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:42:02,204 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2032539186] [2022-02-15 14:42:02,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:42:02,204 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:42:02,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:42:02,413 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:42:02,413 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:42:02,413 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2032539186] [2022-02-15 14:42:02,413 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2032539186] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:42:02,413 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [356470697] [2022-02-15 14:42:02,413 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-15 14:42:02,413 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:42:02,413 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:42:02,416 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) [2022-02-15 14:42:02,417 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Waiting until timeout for monitored process [2022-02-15 14:42:02,441 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-15 14:42:02,442 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:42:02,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 22 conjunts are in the unsatisfiable core [2022-02-15 14:42:02,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:42:02,845 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:42:02,846 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:42:03,274 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:42:03,274 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [356470697] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:42:03,274 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:42:03,274 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 25 [2022-02-15 14:42:03,274 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57467705] [2022-02-15 14:42:03,274 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:42:03,274 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-15 14:42:03,274 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:42:03,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-15 14:42:03,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=537, Unknown=0, NotChecked=0, Total=650 [2022-02-15 14:42:03,275 INFO L87 Difference]: Start difference. First operand 1527 states and 4366 transitions. Second operand has 26 states, 26 states have (on average 3.269230769230769) internal successors, (85), 25 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) [2022-02-15 14:42:04,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:42:04,188 INFO L93 Difference]: Finished difference Result 2353 states and 6675 transitions. [2022-02-15 14:42:04,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-02-15 14:42:04,188 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 3.269230769230769) internal successors, (85), 25 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) Word has length 33 [2022-02-15 14:42:04,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:42:04,192 INFO L225 Difference]: With dead ends: 2353 [2022-02-15 14:42:04,192 INFO L226 Difference]: Without dead ends: 2338 [2022-02-15 14:42:04,192 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 46 SyntacticMatches, 5 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 468 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=273, Invalid=1287, Unknown=0, NotChecked=0, Total=1560 [2022-02-15 14:42:04,193 INFO L933 BasicCegarLoop]: 85 mSDtfsCounter, 264 mSDsluCounter, 1459 mSDsCounter, 0 mSdLazyCounter, 1430 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 264 SdHoareTripleChecker+Valid, 982 SdHoareTripleChecker+Invalid, 1461 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 1430 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-15 14:42:04,193 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [264 Valid, 982 Invalid, 1461 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 1430 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-15 14:42:04,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2338 states. [2022-02-15 14:42:04,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2338 to 1523. [2022-02-15 14:42:04,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1523 states, 1522 states have (on average 2.862023653088042) internal successors, (4356), 1522 states have internal predecessors, (4356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:42:04,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1523 states to 1523 states and 4356 transitions. [2022-02-15 14:42:04,214 INFO L78 Accepts]: Start accepts. Automaton has 1523 states and 4356 transitions. Word has length 33 [2022-02-15 14:42:04,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:42:04,214 INFO L470 AbstractCegarLoop]: Abstraction has 1523 states and 4356 transitions. [2022-02-15 14:42:04,214 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 3.269230769230769) internal successors, (85), 25 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) [2022-02-15 14:42:04,214 INFO L276 IsEmpty]: Start isEmpty. Operand 1523 states and 4356 transitions. [2022-02-15 14:42:04,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-02-15 14:42:04,216 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:42:04,216 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:42:04,232 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Forceful destruction successful, exit code 0 [2022-02-15 14:42:04,416 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,78 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:42:04,417 INFO L402 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 14:42:04,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:42:04,418 INFO L85 PathProgramCache]: Analyzing trace with hash 1932089667, now seen corresponding path program 79 times [2022-02-15 14:42:04,418 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:42:04,418 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [745732490] [2022-02-15 14:42:04,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:42:04,418 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:42:04,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:42:04,656 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:42:04,657 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:42:04,657 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [745732490] [2022-02-15 14:42:04,657 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [745732490] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:42:04,657 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1269898820] [2022-02-15 14:42:04,657 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-15 14:42:04,657 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:42:04,657 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:42:04,658 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) [2022-02-15 14:42:04,659 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Waiting until timeout for monitored process [2022-02-15 14:42:04,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:42:04,684 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-15 14:42:04,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:42:05,060 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:42:05,061 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:42:05,492 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:42:05,492 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1269898820] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:42:05,492 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:42:05,492 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 22 [2022-02-15 14:42:05,493 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854410834] [2022-02-15 14:42:05,493 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:42:05,493 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-02-15 14:42:05,493 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:42:05,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-02-15 14:42:05,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2022-02-15 14:42:05,493 INFO L87 Difference]: Start difference. First operand 1523 states and 4356 transitions. Second operand has 23 states, 23 states have (on average 3.0434782608695654) internal successors, (70), 22 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:42:06,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:42:06,853 INFO L93 Difference]: Finished difference Result 2178 states and 6117 transitions. [2022-02-15 14:42:06,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-02-15 14:42:06,853 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.0434782608695654) internal successors, (70), 22 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-02-15 14:42:06,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:42:06,856 INFO L225 Difference]: With dead ends: 2178 [2022-02-15 14:42:06,856 INFO L226 Difference]: Without dead ends: 2163 [2022-02-15 14:42:06,856 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 48 SyntacticMatches, 6 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 448 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=290, Invalid=1350, Unknown=0, NotChecked=0, Total=1640 [2022-02-15 14:42:06,857 INFO L933 BasicCegarLoop]: 99 mSDtfsCounter, 278 mSDsluCounter, 1821 mSDsCounter, 0 mSdLazyCounter, 1810 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 278 SdHoareTripleChecker+Valid, 1207 SdHoareTripleChecker+Invalid, 1859 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 1810 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-15 14:42:06,857 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [278 Valid, 1207 Invalid, 1859 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 1810 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-15 14:42:06,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2163 states. [2022-02-15 14:42:06,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2163 to 1529. [2022-02-15 14:42:06,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1529 states, 1528 states have (on average 2.865183246073298) internal successors, (4378), 1528 states have internal predecessors, (4378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:42:06,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1529 states to 1529 states and 4378 transitions. [2022-02-15 14:42:06,882 INFO L78 Accepts]: Start accepts. Automaton has 1529 states and 4378 transitions. Word has length 33 [2022-02-15 14:42:06,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:42:06,882 INFO L470 AbstractCegarLoop]: Abstraction has 1529 states and 4378 transitions. [2022-02-15 14:42:06,882 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.0434782608695654) internal successors, (70), 22 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:42:06,882 INFO L276 IsEmpty]: Start isEmpty. Operand 1529 states and 4378 transitions. [2022-02-15 14:42:06,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-02-15 14:42:06,883 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:42:06,883 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:42:06,899 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Ended with exit code 0 [2022-02-15 14:42:07,084 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,79 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:42:07,084 INFO L402 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 14:42:07,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:42:07,084 INFO L85 PathProgramCache]: Analyzing trace with hash 265691081, now seen corresponding path program 80 times [2022-02-15 14:42:07,085 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:42:07,085 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1317481768] [2022-02-15 14:42:07,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:42:07,085 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:42:07,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:42:07,256 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:42:07,256 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:42:07,256 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1317481768] [2022-02-15 14:42:07,256 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1317481768] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:42:07,256 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [137921756] [2022-02-15 14:42:07,256 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-15 14:42:07,256 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:42:07,257 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:42:07,257 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) [2022-02-15 14:42:07,258 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Waiting until timeout for monitored process [2022-02-15 14:42:07,282 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-15 14:42:07,283 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:42:07,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 25 conjunts are in the unsatisfiable core [2022-02-15 14:42:07,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:42:07,459 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-02-15 14:42:07,720 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:42:07,720 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:42:08,184 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:42:08,184 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [137921756] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:42:08,184 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:42:08,184 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 25 [2022-02-15 14:42:08,184 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311290439] [2022-02-15 14:42:08,184 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:42:08,185 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-15 14:42:08,185 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:42:08,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-15 14:42:08,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=540, Unknown=0, NotChecked=0, Total=650 [2022-02-15 14:42:08,185 INFO L87 Difference]: Start difference. First operand 1529 states and 4378 transitions. Second operand has 26 states, 26 states have (on average 3.269230769230769) internal successors, (85), 25 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) [2022-02-15 14:42:09,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:42:09,339 INFO L93 Difference]: Finished difference Result 2149 states and 6052 transitions. [2022-02-15 14:42:09,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-02-15 14:42:09,339 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 3.269230769230769) internal successors, (85), 25 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) Word has length 33 [2022-02-15 14:42:09,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:42:09,342 INFO L225 Difference]: With dead ends: 2149 [2022-02-15 14:42:09,342 INFO L226 Difference]: Without dead ends: 2134 [2022-02-15 14:42:09,343 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 44 SyntacticMatches, 7 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 586 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=307, Invalid=1585, Unknown=0, NotChecked=0, Total=1892 [2022-02-15 14:42:09,343 INFO L933 BasicCegarLoop]: 100 mSDtfsCounter, 336 mSDsluCounter, 1242 mSDsCounter, 0 mSdLazyCounter, 1187 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 336 SdHoareTripleChecker+Valid, 864 SdHoareTripleChecker+Invalid, 1230 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 1187 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-15 14:42:09,343 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [336 Valid, 864 Invalid, 1230 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 1187 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-15 14:42:09,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2134 states. [2022-02-15 14:42:09,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2134 to 1521. [2022-02-15 14:42:09,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1521 states, 1520 states have (on average 2.860526315789474) internal successors, (4348), 1520 states have internal predecessors, (4348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:42:09,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1521 states to 1521 states and 4348 transitions. [2022-02-15 14:42:09,359 INFO L78 Accepts]: Start accepts. Automaton has 1521 states and 4348 transitions. Word has length 33 [2022-02-15 14:42:09,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:42:09,360 INFO L470 AbstractCegarLoop]: Abstraction has 1521 states and 4348 transitions. [2022-02-15 14:42:09,360 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 3.269230769230769) internal successors, (85), 25 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) [2022-02-15 14:42:09,360 INFO L276 IsEmpty]: Start isEmpty. Operand 1521 states and 4348 transitions. [2022-02-15 14:42:09,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-02-15 14:42:09,361 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:42:09,361 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:42:09,377 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Ended with exit code 0 [2022-02-15 14:42:09,562 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 80 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable82 [2022-02-15 14:42:09,562 INFO L402 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 14:42:09,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:42:09,562 INFO L85 PathProgramCache]: Analyzing trace with hash -620470029, now seen corresponding path program 81 times [2022-02-15 14:42:09,562 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:42:09,562 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [296806388] [2022-02-15 14:42:09,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:42:09,562 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:42:09,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:42:09,737 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:42:09,737 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:42:09,737 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [296806388] [2022-02-15 14:42:09,737 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [296806388] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:42:09,737 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [86038494] [2022-02-15 14:42:09,738 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-15 14:42:09,738 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:42:09,738 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:42:09,739 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) [2022-02-15 14:42:09,739 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Waiting until timeout for monitored process [2022-02-15 14:42:09,762 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-02-15 14:42:09,762 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:42:09,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 25 conjunts are in the unsatisfiable core [2022-02-15 14:42:09,763 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:42:09,943 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-02-15 14:42:10,207 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:42:10,207 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:42:10,684 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:42:10,684 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [86038494] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:42:10,684 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:42:10,684 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 26 [2022-02-15 14:42:10,684 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1843433856] [2022-02-15 14:42:10,684 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:42:10,684 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-15 14:42:10,684 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:42:10,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-15 14:42:10,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=584, Unknown=0, NotChecked=0, Total=702 [2022-02-15 14:42:10,685 INFO L87 Difference]: Start difference. First operand 1521 states and 4348 transitions. Second operand has 27 states, 27 states have (on average 3.185185185185185) internal successors, (86), 26 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:42:12,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:42:12,081 INFO L93 Difference]: Finished difference Result 2712 states and 7650 transitions. [2022-02-15 14:42:12,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-02-15 14:42:12,081 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 3.185185185185185) internal successors, (86), 26 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-02-15 14:42:12,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:42:12,085 INFO L225 Difference]: With dead ends: 2712 [2022-02-15 14:42:12,085 INFO L226 Difference]: Without dead ends: 2693 [2022-02-15 14:42:12,085 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 44 SyntacticMatches, 6 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 678 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=335, Invalid=1827, Unknown=0, NotChecked=0, Total=2162 [2022-02-15 14:42:12,085 INFO L933 BasicCegarLoop]: 116 mSDtfsCounter, 388 mSDsluCounter, 2453 mSDsCounter, 0 mSdLazyCounter, 2107 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 388 SdHoareTripleChecker+Valid, 1662 SdHoareTripleChecker+Invalid, 2152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 2107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-15 14:42:12,086 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [388 Valid, 1662 Invalid, 2152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 2107 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-15 14:42:12,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2693 states. [2022-02-15 14:42:12,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2693 to 1529. [2022-02-15 14:42:12,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1529 states, 1528 states have (on average 2.862565445026178) internal successors, (4374), 1528 states have internal predecessors, (4374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:42:12,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1529 states to 1529 states and 4374 transitions. [2022-02-15 14:42:12,105 INFO L78 Accepts]: Start accepts. Automaton has 1529 states and 4374 transitions. Word has length 33 [2022-02-15 14:42:12,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:42:12,105 INFO L470 AbstractCegarLoop]: Abstraction has 1529 states and 4374 transitions. [2022-02-15 14:42:12,105 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 3.185185185185185) internal successors, (86), 26 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:42:12,105 INFO L276 IsEmpty]: Start isEmpty. Operand 1529 states and 4374 transitions. [2022-02-15 14:42:12,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-02-15 14:42:12,106 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:42:12,106 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:42:12,123 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Forceful destruction successful, exit code 0 [2022-02-15 14:42:12,307 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,81 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:42:12,307 INFO L402 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 14:42:12,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:42:12,307 INFO L85 PathProgramCache]: Analyzing trace with hash 255712435, now seen corresponding path program 82 times [2022-02-15 14:42:12,307 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:42:12,307 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [812513608] [2022-02-15 14:42:12,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:42:12,307 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:42:12,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:42:12,487 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:42:12,487 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:42:12,487 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [812513608] [2022-02-15 14:42:12,487 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [812513608] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:42:12,487 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [249341156] [2022-02-15 14:42:12,487 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-15 14:42:12,487 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:42:12,487 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:42:12,488 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) [2022-02-15 14:42:12,489 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Waiting until timeout for monitored process [2022-02-15 14:42:12,512 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-15 14:42:12,512 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:42:12,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-15 14:42:12,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:42:12,874 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:42:12,874 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:42:13,331 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:42:13,332 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [249341156] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:42:13,332 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:42:13,332 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 23 [2022-02-15 14:42:13,332 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314151204] [2022-02-15 14:42:13,332 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:42:13,332 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-02-15 14:42:13,332 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:42:13,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-02-15 14:42:13,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=463, Unknown=0, NotChecked=0, Total=552 [2022-02-15 14:42:13,332 INFO L87 Difference]: Start difference. First operand 1529 states and 4374 transitions. Second operand has 24 states, 24 states have (on average 2.9583333333333335) internal successors, (71), 23 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:42:14,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:42:14,680 INFO L93 Difference]: Finished difference Result 2282 states and 6441 transitions. [2022-02-15 14:42:14,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-02-15 14:42:14,680 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.9583333333333335) internal successors, (71), 23 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-02-15 14:42:14,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:42:14,683 INFO L225 Difference]: With dead ends: 2282 [2022-02-15 14:42:14,683 INFO L226 Difference]: Without dead ends: 2267 [2022-02-15 14:42:14,683 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 48 SyntacticMatches, 5 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 538 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=324, Invalid=1656, Unknown=0, NotChecked=0, Total=1980 [2022-02-15 14:42:14,684 INFO L933 BasicCegarLoop]: 130 mSDtfsCounter, 372 mSDsluCounter, 1730 mSDsCounter, 0 mSdLazyCounter, 1571 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 372 SdHoareTripleChecker+Valid, 1211 SdHoareTripleChecker+Invalid, 1618 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 1571 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-15 14:42:14,684 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [372 Valid, 1211 Invalid, 1618 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 1571 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-15 14:42:14,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2267 states. [2022-02-15 14:42:14,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2267 to 1521. [2022-02-15 14:42:14,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1521 states, 1520 states have (on average 2.860526315789474) internal successors, (4348), 1520 states have internal predecessors, (4348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:42:14,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1521 states to 1521 states and 4348 transitions. [2022-02-15 14:42:14,700 INFO L78 Accepts]: Start accepts. Automaton has 1521 states and 4348 transitions. Word has length 33 [2022-02-15 14:42:14,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:42:14,700 INFO L470 AbstractCegarLoop]: Abstraction has 1521 states and 4348 transitions. [2022-02-15 14:42:14,700 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.9583333333333335) internal successors, (71), 23 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:42:14,701 INFO L276 IsEmpty]: Start isEmpty. Operand 1521 states and 4348 transitions. [2022-02-15 14:42:14,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-02-15 14:42:14,702 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:42:14,702 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:42:14,717 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Forceful destruction successful, exit code 0 [2022-02-15 14:42:14,915 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,82 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:42:14,915 INFO L402 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 14:42:14,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:42:14,915 INFO L85 PathProgramCache]: Analyzing trace with hash 1529684551, now seen corresponding path program 83 times [2022-02-15 14:42:14,916 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:42:14,916 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [491391588] [2022-02-15 14:42:14,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:42:14,916 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:42:14,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:42:15,137 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:42:15,137 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:42:15,137 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [491391588] [2022-02-15 14:42:15,138 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [491391588] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:42:15,138 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [687421184] [2022-02-15 14:42:15,138 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-15 14:42:15,138 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:42:15,138 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:42:15,139 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) [2022-02-15 14:42:15,139 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Waiting until timeout for monitored process [2022-02-15 14:42:15,163 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-15 14:42:15,163 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:42:15,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 30 conjunts are in the unsatisfiable core [2022-02-15 14:42:15,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:42:15,341 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-02-15 14:42:15,429 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-02-15 14:42:15,597 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:42:15,597 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:42:15,874 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:42:15,875 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 42 [2022-02-15 14:42:15,973 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:42:15,974 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 45 [2022-02-15 14:42:16,231 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:42:16,231 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [687421184] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:42:16,231 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:42:16,231 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 12] total 31 [2022-02-15 14:42:16,231 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [459005937] [2022-02-15 14:42:16,231 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:42:16,232 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-02-15 14:42:16,232 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:42:16,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-02-15 14:42:16,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=854, Unknown=0, NotChecked=0, Total=992 [2022-02-15 14:42:16,232 INFO L87 Difference]: Start difference. First operand 1521 states and 4348 transitions. Second operand has 32 states, 32 states have (on average 2.9375) internal successors, (94), 31 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) [2022-02-15 14:42:17,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:42:17,840 INFO L93 Difference]: Finished difference Result 2242 states and 6292 transitions. [2022-02-15 14:42:17,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-02-15 14:42:17,840 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.9375) internal successors, (94), 31 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) Word has length 33 [2022-02-15 14:42:17,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:42:17,844 INFO L225 Difference]: With dead ends: 2242 [2022-02-15 14:42:17,844 INFO L226 Difference]: Without dead ends: 2227 [2022-02-15 14:42:17,844 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 42 SyntacticMatches, 3 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 896 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=452, Invalid=2628, Unknown=0, NotChecked=0, Total=3080 [2022-02-15 14:42:17,844 INFO L933 BasicCegarLoop]: 105 mSDtfsCounter, 325 mSDsluCounter, 2018 mSDsCounter, 0 mSdLazyCounter, 2069 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 325 SdHoareTripleChecker+Valid, 1632 SdHoareTripleChecker+Invalid, 2129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 2069 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-15 14:42:17,845 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [325 Valid, 1632 Invalid, 2129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 2069 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-15 14:42:17,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2227 states. [2022-02-15 14:42:17,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2227 to 1519. [2022-02-15 14:42:17,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1519 states, 1518 states have (on average 2.86034255599473) internal successors, (4342), 1518 states have internal predecessors, (4342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:42:17,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1519 states to 1519 states and 4342 transitions. [2022-02-15 14:42:17,863 INFO L78 Accepts]: Start accepts. Automaton has 1519 states and 4342 transitions. Word has length 33 [2022-02-15 14:42:17,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:42:17,863 INFO L470 AbstractCegarLoop]: Abstraction has 1519 states and 4342 transitions. [2022-02-15 14:42:17,863 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.9375) internal successors, (94), 31 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) [2022-02-15 14:42:17,863 INFO L276 IsEmpty]: Start isEmpty. Operand 1519 states and 4342 transitions. [2022-02-15 14:42:17,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-02-15 14:42:17,865 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:42:17,865 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:42:17,880 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Ended with exit code 0 [2022-02-15 14:42:18,065 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable85 [2022-02-15 14:42:18,065 INFO L402 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 14:42:18,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:42:18,066 INFO L85 PathProgramCache]: Analyzing trace with hash -1558594751, now seen corresponding path program 84 times [2022-02-15 14:42:18,066 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:42:18,066 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [99508998] [2022-02-15 14:42:18,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:42:18,066 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:42:18,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:42:18,238 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:42:18,238 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:42:18,238 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [99508998] [2022-02-15 14:42:18,238 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [99508998] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:42:18,238 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [184479268] [2022-02-15 14:42:18,238 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-15 14:42:18,238 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:42:18,238 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:42:18,239 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) [2022-02-15 14:42:18,240 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Waiting until timeout for monitored process [2022-02-15 14:42:18,263 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-02-15 14:42:18,263 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:42:18,264 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 25 conjunts are in the unsatisfiable core [2022-02-15 14:42:18,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:42:18,437 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-02-15 14:42:18,698 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:42:18,698 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:42:19,158 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:42:19,158 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [184479268] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:42:19,158 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:42:19,158 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 26 [2022-02-15 14:42:19,158 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1960661576] [2022-02-15 14:42:19,158 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:42:19,158 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-15 14:42:19,158 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:42:19,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-15 14:42:19,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=584, Unknown=0, NotChecked=0, Total=702 [2022-02-15 14:42:19,159 INFO L87 Difference]: Start difference. First operand 1519 states and 4342 transitions. Second operand has 27 states, 27 states have (on average 3.185185185185185) internal successors, (86), 26 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:42:20,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:42:20,706 INFO L93 Difference]: Finished difference Result 3203 states and 8934 transitions. [2022-02-15 14:42:20,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-02-15 14:42:20,707 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 3.185185185185185) internal successors, (86), 26 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-02-15 14:42:20,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:42:20,711 INFO L225 Difference]: With dead ends: 3203 [2022-02-15 14:42:20,711 INFO L226 Difference]: Without dead ends: 3184 [2022-02-15 14:42:20,711 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 44 SyntacticMatches, 6 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 775 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=366, Invalid=2084, Unknown=0, NotChecked=0, Total=2450 [2022-02-15 14:42:20,711 INFO L933 BasicCegarLoop]: 129 mSDtfsCounter, 468 mSDsluCounter, 2306 mSDsCounter, 0 mSdLazyCounter, 1971 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 468 SdHoareTripleChecker+Valid, 1579 SdHoareTripleChecker+Invalid, 2024 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 1971 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-15 14:42:20,711 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [468 Valid, 1579 Invalid, 2024 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 1971 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-15 14:42:20,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3184 states. [2022-02-15 14:42:20,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3184 to 1523. [2022-02-15 14:42:20,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1523 states, 1522 states have (on average 2.862023653088042) internal successors, (4356), 1522 states have internal predecessors, (4356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:42:20,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1523 states to 1523 states and 4356 transitions. [2022-02-15 14:42:20,731 INFO L78 Accepts]: Start accepts. Automaton has 1523 states and 4356 transitions. Word has length 33 [2022-02-15 14:42:20,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:42:20,731 INFO L470 AbstractCegarLoop]: Abstraction has 1523 states and 4356 transitions. [2022-02-15 14:42:20,731 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 3.185185185185185) internal successors, (86), 26 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:42:20,731 INFO L276 IsEmpty]: Start isEmpty. Operand 1523 states and 4356 transitions. [2022-02-15 14:42:20,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-02-15 14:42:20,733 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:42:20,733 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:42:20,748 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Forceful destruction successful, exit code 0 [2022-02-15 14:42:20,933 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,84 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:42:20,933 INFO L402 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 14:42:20,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:42:20,933 INFO L85 PathProgramCache]: Analyzing trace with hash -682412287, now seen corresponding path program 85 times [2022-02-15 14:42:20,934 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:42:20,934 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1411655926] [2022-02-15 14:42:20,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:42:20,934 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:42:20,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:42:21,112 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:42:21,112 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:42:21,112 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1411655926] [2022-02-15 14:42:21,112 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1411655926] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:42:21,112 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [723711172] [2022-02-15 14:42:21,112 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-15 14:42:21,112 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:42:21,112 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:42:21,113 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) [2022-02-15 14:42:21,114 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Waiting until timeout for monitored process [2022-02-15 14:42:21,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:42:21,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-15 14:42:21,137 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:42:21,492 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:42:21,492 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:42:21,972 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:42:21,972 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [723711172] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:42:21,972 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:42:21,972 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 23 [2022-02-15 14:42:21,972 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1398125590] [2022-02-15 14:42:21,972 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:42:21,972 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-02-15 14:42:21,973 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:42:21,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-02-15 14:42:21,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=463, Unknown=0, NotChecked=0, Total=552 [2022-02-15 14:42:21,973 INFO L87 Difference]: Start difference. First operand 1523 states and 4356 transitions. Second operand has 24 states, 24 states have (on average 2.9583333333333335) internal successors, (71), 23 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:42:23,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:42:23,806 INFO L93 Difference]: Finished difference Result 2715 states and 7541 transitions. [2022-02-15 14:42:23,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-02-15 14:42:23,807 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.9583333333333335) internal successors, (71), 23 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-02-15 14:42:23,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:42:23,810 INFO L225 Difference]: With dead ends: 2715 [2022-02-15 14:42:23,810 INFO L226 Difference]: Without dead ends: 2700 [2022-02-15 14:42:23,813 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 48 SyntacticMatches, 5 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 726 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=390, Invalid=2160, Unknown=0, NotChecked=0, Total=2550 [2022-02-15 14:42:23,813 INFO L933 BasicCegarLoop]: 135 mSDtfsCounter, 461 mSDsluCounter, 2335 mSDsCounter, 0 mSdLazyCounter, 2030 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 461 SdHoareTripleChecker+Valid, 1586 SdHoareTripleChecker+Invalid, 2084 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 2030 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-15 14:42:23,814 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [461 Valid, 1586 Invalid, 2084 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 2030 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-15 14:42:23,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2700 states. [2022-02-15 14:42:23,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2700 to 1511. [2022-02-15 14:42:23,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1511 states, 1510 states have (on average 2.8596026490066224) internal successors, (4318), 1510 states have internal predecessors, (4318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:42:23,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1511 states to 1511 states and 4318 transitions. [2022-02-15 14:42:23,833 INFO L78 Accepts]: Start accepts. Automaton has 1511 states and 4318 transitions. Word has length 33 [2022-02-15 14:42:23,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:42:23,834 INFO L470 AbstractCegarLoop]: Abstraction has 1511 states and 4318 transitions. [2022-02-15 14:42:23,834 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.9583333333333335) internal successors, (71), 23 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:42:23,834 INFO L276 IsEmpty]: Start isEmpty. Operand 1511 states and 4318 transitions. [2022-02-15 14:42:23,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-02-15 14:42:23,835 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:42:23,835 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:42:23,850 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Forceful destruction successful, exit code 0 [2022-02-15 14:42:24,035 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87,85 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:42:24,036 INFO L402 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 14:42:24,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:42:24,036 INFO L85 PathProgramCache]: Analyzing trace with hash -553984637, now seen corresponding path program 86 times [2022-02-15 14:42:24,036 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:42:24,036 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1877893671] [2022-02-15 14:42:24,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:42:24,036 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:42:24,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:42:24,214 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:42:24,214 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:42:24,214 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1877893671] [2022-02-15 14:42:24,215 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1877893671] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:42:24,215 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1874433418] [2022-02-15 14:42:24,215 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-15 14:42:24,215 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:42:24,215 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:42:24,216 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) [2022-02-15 14:42:24,217 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Waiting until timeout for monitored process [2022-02-15 14:42:24,239 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-15 14:42:24,240 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:42:24,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 25 conjunts are in the unsatisfiable core [2022-02-15 14:42:24,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:42:24,421 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 5 treesize of output 3 [2022-02-15 14:42:24,682 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:42:24,682 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:42:25,151 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:42:25,151 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1874433418] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:42:25,152 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:42:25,152 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 26 [2022-02-15 14:42:25,152 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [778981524] [2022-02-15 14:42:25,152 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:42:25,152 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-15 14:42:25,152 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:42:25,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-15 14:42:25,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=585, Unknown=0, NotChecked=0, Total=702 [2022-02-15 14:42:25,152 INFO L87 Difference]: Start difference. First operand 1511 states and 4318 transitions. Second operand has 27 states, 27 states have (on average 3.2222222222222223) internal successors, (87), 26 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:42:26,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:42:26,935 INFO L93 Difference]: Finished difference Result 2483 states and 6896 transitions. [2022-02-15 14:42:26,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-02-15 14:42:26,936 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 3.2222222222222223) internal successors, (87), 26 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-02-15 14:42:26,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:42:26,939 INFO L225 Difference]: With dead ends: 2483 [2022-02-15 14:42:26,939 INFO L226 Difference]: Without dead ends: 2468 [2022-02-15 14:42:26,939 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 44 SyntacticMatches, 6 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 956 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=470, Invalid=2610, Unknown=0, NotChecked=0, Total=3080 [2022-02-15 14:42:26,940 INFO L933 BasicCegarLoop]: 109 mSDtfsCounter, 462 mSDsluCounter, 2169 mSDsCounter, 0 mSdLazyCounter, 1917 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 462 SdHoareTripleChecker+Valid, 1431 SdHoareTripleChecker+Invalid, 1974 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 1917 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-15 14:42:26,940 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [462 Valid, 1431 Invalid, 1974 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 1917 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-15 14:42:26,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2468 states. [2022-02-15 14:42:26,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2468 to 1517. [2022-02-15 14:42:26,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1517 states, 1516 states have (on average 2.862796833773087) internal successors, (4340), 1516 states have internal predecessors, (4340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:42:26,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1517 states to 1517 states and 4340 transitions. [2022-02-15 14:42:26,957 INFO L78 Accepts]: Start accepts. Automaton has 1517 states and 4340 transitions. Word has length 33 [2022-02-15 14:42:26,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:42:26,958 INFO L470 AbstractCegarLoop]: Abstraction has 1517 states and 4340 transitions. [2022-02-15 14:42:26,958 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 3.2222222222222223) internal successors, (87), 26 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:42:26,958 INFO L276 IsEmpty]: Start isEmpty. Operand 1517 states and 4340 transitions. [2022-02-15 14:42:26,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-02-15 14:42:26,959 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:42:26,959 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:42:26,975 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Forceful destruction successful, exit code 0 [2022-02-15 14:42:27,168 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 86 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable88 [2022-02-15 14:42:27,169 INFO L402 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 14:42:27,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:42:27,169 INFO L85 PathProgramCache]: Analyzing trace with hash 2074584073, now seen corresponding path program 87 times [2022-02-15 14:42:27,169 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:42:27,169 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [472086537] [2022-02-15 14:42:27,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:42:27,169 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:42:27,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:42:27,354 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:42:27,354 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:42:27,355 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [472086537] [2022-02-15 14:42:27,355 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [472086537] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:42:27,355 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1690709179] [2022-02-15 14:42:27,355 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-15 14:42:27,355 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:42:27,355 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:42:27,356 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) [2022-02-15 14:42:27,356 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Waiting until timeout for monitored process [2022-02-15 14:42:27,380 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-15 14:42:27,380 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:42:27,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 22 conjunts are in the unsatisfiable core [2022-02-15 14:42:27,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:42:27,783 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:42:27,784 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:42:28,248 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:42:28,248 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1690709179] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:42:28,248 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:42:28,248 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 26 [2022-02-15 14:42:28,248 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [329021720] [2022-02-15 14:42:28,248 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:42:28,248 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-15 14:42:28,249 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:42:28,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-15 14:42:28,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=585, Unknown=0, NotChecked=0, Total=702 [2022-02-15 14:42:28,249 INFO L87 Difference]: Start difference. First operand 1517 states and 4340 transitions. Second operand has 27 states, 27 states have (on average 3.2222222222222223) internal successors, (87), 26 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:42:29,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:42:29,616 INFO L93 Difference]: Finished difference Result 2842 states and 7932 transitions. [2022-02-15 14:42:29,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-02-15 14:42:29,616 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 3.2222222222222223) internal successors, (87), 26 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-02-15 14:42:29,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:42:29,620 INFO L225 Difference]: With dead ends: 2842 [2022-02-15 14:42:29,620 INFO L226 Difference]: Without dead ends: 2827 [2022-02-15 14:42:29,621 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 46 SyntacticMatches, 4 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 676 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=349, Invalid=1907, Unknown=0, NotChecked=0, Total=2256 [2022-02-15 14:42:29,621 INFO L933 BasicCegarLoop]: 110 mSDtfsCounter, 393 mSDsluCounter, 2258 mSDsCounter, 0 mSdLazyCounter, 1937 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 393 SdHoareTripleChecker+Valid, 1501 SdHoareTripleChecker+Invalid, 1978 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 1937 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-15 14:42:29,621 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [393 Valid, 1501 Invalid, 1978 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 1937 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-15 14:42:29,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2827 states. [2022-02-15 14:42:29,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2827 to 1450. [2022-02-15 14:42:29,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1450 states, 1449 states have (on average 2.8612836438923397) internal successors, (4146), 1449 states have internal predecessors, (4146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:42:29,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1450 states to 1450 states and 4146 transitions. [2022-02-15 14:42:29,642 INFO L78 Accepts]: Start accepts. Automaton has 1450 states and 4146 transitions. Word has length 33 [2022-02-15 14:42:29,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:42:29,642 INFO L470 AbstractCegarLoop]: Abstraction has 1450 states and 4146 transitions. [2022-02-15 14:42:29,642 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 3.2222222222222223) internal successors, (87), 26 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:42:29,643 INFO L276 IsEmpty]: Start isEmpty. Operand 1450 states and 4146 transitions. [2022-02-15 14:42:29,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-02-15 14:42:29,644 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:42:29,644 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:42:29,662 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Forceful destruction successful, exit code 0 [2022-02-15 14:42:29,844 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89,87 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:42:29,845 INFO L402 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 14:42:29,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:42:29,845 INFO L85 PathProgramCache]: Analyzing trace with hash 1434777477, now seen corresponding path program 1 times [2022-02-15 14:42:29,845 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:42:29,845 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1450743928] [2022-02-15 14:42:29,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:42:29,845 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:42:29,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:42:29,861 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 14:42:29,861 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:42:29,861 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1450743928] [2022-02-15 14:42:29,861 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1450743928] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:42:29,862 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [523514957] [2022-02-15 14:42:29,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:42:29,862 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:42:29,862 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:42:29,863 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) [2022-02-15 14:42:29,863 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Waiting until timeout for monitored process [2022-02-15 14:42:29,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:42:29,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2022-02-15 14:42:29,887 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:42:29,910 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-02-15 14:42:29,936 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 14:42:29,936 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:42:29,979 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-15 14:42:29,979 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 12 [2022-02-15 14:42:29,991 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 14:42:29,992 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [523514957] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:42:29,992 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:42:29,992 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 7 [2022-02-15 14:42:29,992 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1543668968] [2022-02-15 14:42:29,992 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:42:29,992 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-02-15 14:42:29,992 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:42:29,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-02-15 14:42:29,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-02-15 14:42:29,992 INFO L87 Difference]: Start difference. First operand 1450 states and 4146 transitions. Second operand has 8 states, 8 states have (on average 5.375) internal successors, (43), 7 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) [2022-02-15 14:42:30,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:42:30,060 INFO L93 Difference]: Finished difference Result 1940 states and 5616 transitions. [2022-02-15 14:42:30,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-02-15 14:42:30,060 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.375) internal successors, (43), 7 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 37 [2022-02-15 14:42:30,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:42:30,062 INFO L225 Difference]: With dead ends: 1940 [2022-02-15 14:42:30,062 INFO L226 Difference]: Without dead ends: 1940 [2022-02-15 14:42:30,063 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 70 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2022-02-15 14:42:30,063 INFO L933 BasicCegarLoop]: 58 mSDtfsCounter, 118 mSDsluCounter, 252 mSDsCounter, 0 mSdLazyCounter, 154 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 252 SdHoareTripleChecker+Invalid, 163 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 154 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-15 14:42:30,063 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [118 Valid, 252 Invalid, 163 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 154 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-15 14:42:30,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1940 states. [2022-02-15 14:42:30,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1940 to 1810. [2022-02-15 14:42:30,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1810 states, 1809 states have (on average 2.902155887230514) internal successors, (5250), 1809 states have internal predecessors, (5250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:42:30,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1810 states to 1810 states and 5250 transitions. [2022-02-15 14:42:30,087 INFO L78 Accepts]: Start accepts. Automaton has 1810 states and 5250 transitions. Word has length 37 [2022-02-15 14:42:30,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:42:30,087 INFO L470 AbstractCegarLoop]: Abstraction has 1810 states and 5250 transitions. [2022-02-15 14:42:30,087 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.375) internal successors, (43), 7 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) [2022-02-15 14:42:30,087 INFO L276 IsEmpty]: Start isEmpty. Operand 1810 states and 5250 transitions. [2022-02-15 14:42:30,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-02-15 14:42:30,089 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:42:30,089 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:42:30,104 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Ended with exit code 0 [2022-02-15 14:42:30,290 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,88 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:42:30,290 INFO L402 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 14:42:30,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:42:30,290 INFO L85 PathProgramCache]: Analyzing trace with hash 1856254911, now seen corresponding path program 88 times [2022-02-15 14:42:30,290 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:42:30,290 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1908903223] [2022-02-15 14:42:30,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:42:30,290 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:42:30,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:42:30,307 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:42:30,307 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:42:30,307 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1908903223] [2022-02-15 14:42:30,307 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1908903223] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:42:30,307 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1934577481] [2022-02-15 14:42:30,307 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-15 14:42:30,307 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:42:30,307 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:42:30,308 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) [2022-02-15 14:42:30,308 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Waiting until timeout for monitored process [2022-02-15 14:42:30,331 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-15 14:42:30,331 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:42:30,332 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 4 conjunts are in the unsatisfiable core [2022-02-15 14:42:30,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:42:30,392 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:42:30,393 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:42:30,446 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:42:30,446 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1934577481] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:42:30,446 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:42:30,446 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 4 [2022-02-15 14:42:30,446 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1599302173] [2022-02-15 14:42:30,446 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:42:30,446 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-15 14:42:30,446 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:42:30,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-15 14:42:30,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-02-15 14:42:30,446 INFO L87 Difference]: Start difference. First operand 1810 states and 5250 transitions. Second operand has 5 states, 5 states have (on average 10.2) internal successors, (51), 4 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:42:30,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:42:30,471 INFO L93 Difference]: Finished difference Result 2953 states and 8537 transitions. [2022-02-15 14:42:30,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-15 14:42:30,471 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.2) internal successors, (51), 4 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2022-02-15 14:42:30,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:42:30,475 INFO L225 Difference]: With dead ends: 2953 [2022-02-15 14:42:30,475 INFO L226 Difference]: Without dead ends: 2856 [2022-02-15 14:42:30,475 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 74 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-02-15 14:42:30,475 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 80 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-15 14:42:30,475 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [80 Valid, 79 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-15 14:42:30,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2856 states. [2022-02-15 14:42:30,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2856 to 2284. [2022-02-15 14:42:30,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2284 states, 2283 states have (on average 2.9890494962768286) internal successors, (6824), 2283 states have internal predecessors, (6824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:42:30,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2284 states to 2284 states and 6824 transitions. [2022-02-15 14:42:30,500 INFO L78 Accepts]: Start accepts. Automaton has 2284 states and 6824 transitions. Word has length 38 [2022-02-15 14:42:30,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:42:30,500 INFO L470 AbstractCegarLoop]: Abstraction has 2284 states and 6824 transitions. [2022-02-15 14:42:30,500 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.2) internal successors, (51), 4 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:42:30,501 INFO L276 IsEmpty]: Start isEmpty. Operand 2284 states and 6824 transitions. [2022-02-15 14:42:30,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-02-15 14:42:30,503 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:42:30,503 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:42:30,519 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Forceful destruction successful, exit code 0 [2022-02-15 14:42:30,715 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,89 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:42:30,715 INFO L402 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 14:42:30,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:42:30,715 INFO L85 PathProgramCache]: Analyzing trace with hash 1630144413, now seen corresponding path program 89 times [2022-02-15 14:42:30,716 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:42:30,716 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [318527868] [2022-02-15 14:42:30,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:42:30,716 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:42:30,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:42:30,729 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 14:42:30,729 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:42:30,729 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [318527868] [2022-02-15 14:42:30,729 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [318527868] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:42:30,729 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1976024178] [2022-02-15 14:42:30,729 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-15 14:42:30,730 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:42:30,730 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:42:30,730 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) [2022-02-15 14:42:30,732 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Waiting until timeout for monitored process [2022-02-15 14:42:30,755 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-15 14:42:30,755 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:42:30,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 4 conjunts are in the unsatisfiable core [2022-02-15 14:42:30,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:42:30,796 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-15 14:42:30,796 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-02-15 14:42:30,797 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1976024178] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 14:42:30,797 INFO L191 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-02-15 14:42:30,797 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 4 [2022-02-15 14:42:30,797 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1318732710] [2022-02-15 14:42:30,797 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 14:42:30,797 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-15 14:42:30,797 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:42:30,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-15 14:42:30,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-02-15 14:42:30,797 INFO L87 Difference]: Start difference. First operand 2284 states and 6824 transitions. Second operand has 4 states, 4 states have (on average 9.5) internal successors, (38), 3 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) [2022-02-15 14:42:30,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:42:30,829 INFO L93 Difference]: Finished difference Result 6496 states and 19271 transitions. [2022-02-15 14:42:30,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-15 14:42:30,829 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.5) internal successors, (38), 3 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 39 [2022-02-15 14:42:30,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:42:30,838 INFO L225 Difference]: With dead ends: 6496 [2022-02-15 14:42:30,838 INFO L226 Difference]: Without dead ends: 6091 [2022-02-15 14:42:30,838 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-02-15 14:42:30,838 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 79 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-15 14:42:30,838 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [79 Valid, 78 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-15 14:42:30,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6091 states. [2022-02-15 14:42:30,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6091 to 5331. [2022-02-15 14:42:30,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5331 states, 5330 states have (on average 3.052908067542214) internal successors, (16272), 5330 states have internal predecessors, (16272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:42:30,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5331 states to 5331 states and 16272 transitions. [2022-02-15 14:42:30,906 INFO L78 Accepts]: Start accepts. Automaton has 5331 states and 16272 transitions. Word has length 39 [2022-02-15 14:42:30,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:42:30,906 INFO L470 AbstractCegarLoop]: Abstraction has 5331 states and 16272 transitions. [2022-02-15 14:42:30,906 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.5) internal successors, (38), 3 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) [2022-02-15 14:42:30,906 INFO L276 IsEmpty]: Start isEmpty. Operand 5331 states and 16272 transitions. [2022-02-15 14:42:30,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-02-15 14:42:30,912 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:42:30,912 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:42:30,927 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Ended with exit code 0 [2022-02-15 14:42:31,112 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 90 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable92 [2022-02-15 14:42:31,112 INFO L402 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 14:42:31,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:42:31,113 INFO L85 PathProgramCache]: Analyzing trace with hash 1568623265, now seen corresponding path program 2 times [2022-02-15 14:42:31,113 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:42:31,113 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1507914552] [2022-02-15 14:42:31,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:42:31,113 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:42:31,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:42:31,165 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:42:31,165 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:42:31,165 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1507914552] [2022-02-15 14:42:31,165 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1507914552] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:42:31,165 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [547225894] [2022-02-15 14:42:31,165 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-15 14:42:31,165 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:42:31,165 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:42:31,166 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) [2022-02-15 14:42:31,167 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Waiting until timeout for monitored process [2022-02-15 14:42:31,193 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-15 14:42:31,193 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:42:31,194 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 18 conjunts are in the unsatisfiable core [2022-02-15 14:42:31,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:42:31,235 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-02-15 14:42:31,262 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 11 treesize of output 7 [2022-02-15 14:42:31,288 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:42:31,288 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:42:31,337 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:42:31,337 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 17 [2022-02-15 14:42:31,362 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:42:31,362 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 21 [2022-02-15 14:42:31,392 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:42:31,392 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [547225894] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:42:31,392 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:42:31,392 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 14 [2022-02-15 14:42:31,392 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889003895] [2022-02-15 14:42:31,392 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:42:31,392 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-02-15 14:42:31,392 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:42:31,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-02-15 14:42:31,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2022-02-15 14:42:31,393 INFO L87 Difference]: Start difference. First operand 5331 states and 16272 transitions. Second operand has 15 states, 15 states have (on average 4.6) internal successors, (69), 14 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:42:31,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:42:31,636 INFO L93 Difference]: Finished difference Result 7486 states and 22666 transitions. [2022-02-15 14:42:31,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-02-15 14:42:31,636 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.6) internal successors, (69), 14 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2022-02-15 14:42:31,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:42:31,647 INFO L225 Difference]: With dead ends: 7486 [2022-02-15 14:42:31,648 INFO L226 Difference]: Without dead ends: 7486 [2022-02-15 14:42:31,648 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 78 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2022-02-15 14:42:31,648 INFO L933 BasicCegarLoop]: 86 mSDtfsCounter, 203 mSDsluCounter, 1061 mSDsCounter, 0 mSdLazyCounter, 610 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 203 SdHoareTripleChecker+Valid, 898 SdHoareTripleChecker+Invalid, 623 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 610 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 14:42:31,648 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [203 Valid, 898 Invalid, 623 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 610 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 14:42:31,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7486 states. [2022-02-15 14:42:31,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7486 to 6990. [2022-02-15 14:42:31,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6990 states, 6989 states have (on average 3.0479324653026185) internal successors, (21302), 6989 states have internal predecessors, (21302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:42:31,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6990 states to 6990 states and 21302 transitions. [2022-02-15 14:42:31,751 INFO L78 Accepts]: Start accepts. Automaton has 6990 states and 21302 transitions. Word has length 43 [2022-02-15 14:42:31,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:42:31,751 INFO L470 AbstractCegarLoop]: Abstraction has 6990 states and 21302 transitions. [2022-02-15 14:42:31,752 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 4.6) internal successors, (69), 14 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:42:31,752 INFO L276 IsEmpty]: Start isEmpty. Operand 6990 states and 21302 transitions. [2022-02-15 14:42:31,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-02-15 14:42:31,760 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:42:31,760 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:42:31,775 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Forceful destruction successful, exit code 0 [2022-02-15 14:42:31,961 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,91 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:42:31,961 INFO L402 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 14:42:31,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:42:31,961 INFO L85 PathProgramCache]: Analyzing trace with hash 1131601065, now seen corresponding path program 3 times [2022-02-15 14:42:31,961 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:42:31,961 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [764991329] [2022-02-15 14:42:31,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:42:31,963 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:42:31,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:42:32,527 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:42:32,528 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:42:32,528 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [764991329] [2022-02-15 14:42:32,528 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [764991329] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:42:32,528 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1349238342] [2022-02-15 14:42:32,528 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-15 14:42:32,528 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:42:32,528 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:42:32,529 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) [2022-02-15 14:42:32,529 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Waiting until timeout for monitored process [2022-02-15 14:42:32,556 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-02-15 14:42:32,556 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:42:32,557 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2022-02-15 14:42:32,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:42:32,757 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-02-15 14:42:32,974 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 11 treesize of output 7 [2022-02-15 14:42:33,544 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:42:33,544 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:42:34,287 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:42:34,288 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 34 treesize of output 36 [2022-02-15 14:42:34,412 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:42:34,412 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 39 [2022-02-15 14:42:34,653 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:42:34,653 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1349238342] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:42:34,653 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:42:34,653 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20, 20] total 53 [2022-02-15 14:42:34,653 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [985029007] [2022-02-15 14:42:34,653 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:42:34,654 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2022-02-15 14:42:34,654 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:42:34,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2022-02-15 14:42:34,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=221, Invalid=2641, Unknown=0, NotChecked=0, Total=2862 [2022-02-15 14:42:34,654 INFO L87 Difference]: Start difference. First operand 6990 states and 21302 transitions. Second operand has 54 states, 54 states have (on average 2.185185185185185) internal successors, (118), 53 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:42:37,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:42:37,597 INFO L93 Difference]: Finished difference Result 15344 states and 45923 transitions. [2022-02-15 14:42:37,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-02-15 14:42:37,597 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 2.185185185185185) internal successors, (118), 53 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2022-02-15 14:42:37,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:42:37,626 INFO L225 Difference]: With dead ends: 15344 [2022-02-15 14:42:37,627 INFO L226 Difference]: Without dead ends: 15187 [2022-02-15 14:42:37,627 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 54 SyntacticMatches, 10 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2267 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=581, Invalid=6901, Unknown=0, NotChecked=0, Total=7482 [2022-02-15 14:42:37,627 INFO L933 BasicCegarLoop]: 127 mSDtfsCounter, 338 mSDsluCounter, 3826 mSDsCounter, 0 mSdLazyCounter, 3814 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 338 SdHoareTripleChecker+Valid, 2952 SdHoareTripleChecker+Invalid, 3890 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 3814 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-02-15 14:42:37,627 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [338 Valid, 2952 Invalid, 3890 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 3814 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-02-15 14:42:37,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15187 states. [2022-02-15 14:42:37,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15187 to 7110. [2022-02-15 14:42:37,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7110 states, 7109 states have (on average 3.039668026445351) internal successors, (21609), 7109 states have internal predecessors, (21609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:42:37,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7110 states to 7110 states and 21609 transitions. [2022-02-15 14:42:37,818 INFO L78 Accepts]: Start accepts. Automaton has 7110 states and 21609 transitions. Word has length 48 [2022-02-15 14:42:37,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:42:37,818 INFO L470 AbstractCegarLoop]: Abstraction has 7110 states and 21609 transitions. [2022-02-15 14:42:37,818 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 2.185185185185185) internal successors, (118), 53 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:42:37,818 INFO L276 IsEmpty]: Start isEmpty. Operand 7110 states and 21609 transitions. [2022-02-15 14:42:37,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-02-15 14:42:37,828 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:42:37,828 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:42:37,843 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Forceful destruction successful, exit code 0 [2022-02-15 14:42:38,028 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,92 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:42:38,028 INFO L402 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 14:42:38,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:42:38,029 INFO L85 PathProgramCache]: Analyzing trace with hash 362868969, now seen corresponding path program 4 times [2022-02-15 14:42:38,029 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:42:38,029 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [671815291] [2022-02-15 14:42:38,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:42:38,029 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:42:38,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:42:38,648 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:42:38,649 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:42:38,649 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [671815291] [2022-02-15 14:42:38,649 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [671815291] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:42:38,649 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1747085387] [2022-02-15 14:42:38,649 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-15 14:42:38,649 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:42:38,649 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:42:38,650 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) [2022-02-15 14:42:38,650 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Waiting until timeout for monitored process [2022-02-15 14:42:38,677 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-15 14:42:38,677 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:42:38,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2022-02-15 14:42:38,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:42:38,892 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-02-15 14:42:39,080 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-02-15 14:42:39,566 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:42:39,566 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:42:40,288 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:42:40,288 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 34 treesize of output 36 [2022-02-15 14:42:40,422 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:42:40,422 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 37 treesize of output 39 [2022-02-15 14:42:40,654 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:42:40,655 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1747085387] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:42:40,655 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:42:40,655 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20, 20] total 53 [2022-02-15 14:42:40,655 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1973475565] [2022-02-15 14:42:40,655 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:42:40,655 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2022-02-15 14:42:40,655 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:42:40,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2022-02-15 14:42:40,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=220, Invalid=2642, Unknown=0, NotChecked=0, Total=2862 [2022-02-15 14:42:40,658 INFO L87 Difference]: Start difference. First operand 7110 states and 21609 transitions. Second operand has 54 states, 54 states have (on average 2.185185185185185) internal successors, (118), 53 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:42:43,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:42:43,420 INFO L93 Difference]: Finished difference Result 15285 states and 45803 transitions. [2022-02-15 14:42:43,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-02-15 14:42:43,420 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 2.185185185185185) internal successors, (118), 53 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2022-02-15 14:42:43,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:42:43,444 INFO L225 Difference]: With dead ends: 15285 [2022-02-15 14:42:43,445 INFO L226 Difference]: Without dead ends: 15250 [2022-02-15 14:42:43,445 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 58 SyntacticMatches, 6 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1901 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=497, Invalid=5983, Unknown=0, NotChecked=0, Total=6480 [2022-02-15 14:42:43,445 INFO L933 BasicCegarLoop]: 112 mSDtfsCounter, 264 mSDsluCounter, 3810 mSDsCounter, 0 mSdLazyCounter, 3847 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 264 SdHoareTripleChecker+Valid, 3074 SdHoareTripleChecker+Invalid, 3922 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 3847 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-02-15 14:42:43,445 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [264 Valid, 3074 Invalid, 3922 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 3847 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-02-15 14:42:43,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15250 states. [2022-02-15 14:42:43,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15250 to 7122. [2022-02-15 14:42:43,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7122 states, 7121 states have (on average 3.0386181716051115) internal successors, (21638), 7121 states have internal predecessors, (21638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:42:43,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7122 states to 7122 states and 21638 transitions. [2022-02-15 14:42:43,589 INFO L78 Accepts]: Start accepts. Automaton has 7122 states and 21638 transitions. Word has length 48 [2022-02-15 14:42:43,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:42:43,589 INFO L470 AbstractCegarLoop]: Abstraction has 7122 states and 21638 transitions. [2022-02-15 14:42:43,589 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 2.185185185185185) internal successors, (118), 53 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:42:43,589 INFO L276 IsEmpty]: Start isEmpty. Operand 7122 states and 21638 transitions. [2022-02-15 14:42:43,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-02-15 14:42:43,598 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:42:43,598 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:42:43,616 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Forceful destruction successful, exit code 0 [2022-02-15 14:42:43,798 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95,93 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:42:43,799 INFO L402 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 14:42:43,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:42:43,799 INFO L85 PathProgramCache]: Analyzing trace with hash 1239051433, now seen corresponding path program 5 times [2022-02-15 14:42:43,799 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:42:43,799 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [727630193] [2022-02-15 14:42:43,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:42:43,799 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:42:43,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:42:44,364 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:42:44,365 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:42:44,365 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [727630193] [2022-02-15 14:42:44,365 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [727630193] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:42:44,365 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1860174221] [2022-02-15 14:42:44,365 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-15 14:42:44,365 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:42:44,365 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:42:44,366 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) [2022-02-15 14:42:44,366 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Waiting until timeout for monitored process [2022-02-15 14:42:44,393 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-02-15 14:42:44,394 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:42:44,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 44 conjunts are in the unsatisfiable core [2022-02-15 14:42:44,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:42:44,586 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 11 treesize of output 7 [2022-02-15 14:42:44,774 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 15 treesize of output 7 [2022-02-15 14:42:45,272 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:42:45,272 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:42:46,023 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:42:46,023 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 36 [2022-02-15 14:42:46,159 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:42:46,159 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 39 [2022-02-15 14:42:46,405 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:42:46,406 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1860174221] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:42:46,406 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:42:46,406 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20, 20] total 53 [2022-02-15 14:42:46,406 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1288859412] [2022-02-15 14:42:46,406 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:42:46,406 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2022-02-15 14:42:46,406 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:42:46,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2022-02-15 14:42:46,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=216, Invalid=2646, Unknown=0, NotChecked=0, Total=2862 [2022-02-15 14:42:46,407 INFO L87 Difference]: Start difference. First operand 7122 states and 21638 transitions. Second operand has 54 states, 54 states have (on average 2.185185185185185) internal successors, (118), 53 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:42:49,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:42:49,143 INFO L93 Difference]: Finished difference Result 12667 states and 38256 transitions. [2022-02-15 14:42:49,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-02-15 14:42:49,144 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 2.185185185185185) internal successors, (118), 53 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2022-02-15 14:42:49,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:42:49,169 INFO L225 Difference]: With dead ends: 12667 [2022-02-15 14:42:49,169 INFO L226 Difference]: Without dead ends: 12623 [2022-02-15 14:42:49,169 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 57 SyntacticMatches, 7 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1876 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=531, Invalid=5949, Unknown=0, NotChecked=0, Total=6480 [2022-02-15 14:42:49,169 INFO L933 BasicCegarLoop]: 107 mSDtfsCounter, 331 mSDsluCounter, 3198 mSDsCounter, 0 mSdLazyCounter, 3268 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 331 SdHoareTripleChecker+Valid, 2605 SdHoareTripleChecker+Invalid, 3442 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 3268 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 82 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-02-15 14:42:49,169 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [331 Valid, 2605 Invalid, 3442 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 3268 Invalid, 0 Unknown, 82 Unchecked, 1.2s Time] [2022-02-15 14:42:49,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12623 states. [2022-02-15 14:42:49,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12623 to 7118. [2022-02-15 14:42:49,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7118 states, 7117 states have (on average 3.038780384993677) internal successors, (21627), 7117 states have internal predecessors, (21627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:42:49,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7118 states to 7118 states and 21627 transitions. [2022-02-15 14:42:49,310 INFO L78 Accepts]: Start accepts. Automaton has 7118 states and 21627 transitions. Word has length 48 [2022-02-15 14:42:49,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:42:49,310 INFO L470 AbstractCegarLoop]: Abstraction has 7118 states and 21627 transitions. [2022-02-15 14:42:49,310 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 2.185185185185185) internal successors, (118), 53 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:42:49,311 INFO L276 IsEmpty]: Start isEmpty. Operand 7118 states and 21627 transitions. [2022-02-15 14:42:49,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-02-15 14:42:49,320 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:42:49,320 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:42:49,337 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Forceful destruction successful, exit code 0 [2022-02-15 14:42:49,520 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96,94 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:42:49,520 INFO L402 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 14:42:49,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:42:49,520 INFO L85 PathProgramCache]: Analyzing trace with hash 504584109, now seen corresponding path program 6 times [2022-02-15 14:42:49,520 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:42:49,520 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1266462367] [2022-02-15 14:42:49,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:42:49,521 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:42:49,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:42:50,050 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:42:50,050 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:42:50,050 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1266462367] [2022-02-15 14:42:50,050 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1266462367] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:42:50,050 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1073384888] [2022-02-15 14:42:50,050 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-15 14:42:50,050 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:42:50,050 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:42:50,051 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) [2022-02-15 14:42:50,052 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Waiting until timeout for monitored process [2022-02-15 14:42:50,078 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-02-15 14:42:50,079 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:42:50,079 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2022-02-15 14:42:50,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:42:50,295 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-02-15 14:42:50,478 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-02-15 14:42:51,055 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:42:51,055 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:42:51,821 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:42:51,821 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 36 [2022-02-15 14:42:51,955 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:42:51,956 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 37 treesize of output 39 [2022-02-15 14:42:52,199 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:42:52,199 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1073384888] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:42:52,199 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:42:52,199 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20, 20] total 54 [2022-02-15 14:42:52,199 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1633891966] [2022-02-15 14:42:52,199 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:42:52,199 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2022-02-15 14:42:52,199 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:42:52,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2022-02-15 14:42:52,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=224, Invalid=2746, Unknown=0, NotChecked=0, Total=2970 [2022-02-15 14:42:52,200 INFO L87 Difference]: Start difference. First operand 7118 states and 21627 transitions. Second operand has 55 states, 55 states have (on average 2.1818181818181817) internal successors, (120), 54 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:42:54,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:42:54,363 INFO L93 Difference]: Finished difference Result 12337 states and 37157 transitions. [2022-02-15 14:42:54,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-02-15 14:42:54,363 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 2.1818181818181817) internal successors, (120), 54 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2022-02-15 14:42:54,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:42:54,385 INFO L225 Difference]: With dead ends: 12337 [2022-02-15 14:42:54,385 INFO L226 Difference]: Without dead ends: 12305 [2022-02-15 14:42:54,386 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 55 SyntacticMatches, 9 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1650 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=420, Invalid=4692, Unknown=0, NotChecked=0, Total=5112 [2022-02-15 14:42:54,386 INFO L933 BasicCegarLoop]: 115 mSDtfsCounter, 306 mSDsluCounter, 4195 mSDsCounter, 0 mSdLazyCounter, 3412 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 306 SdHoareTripleChecker+Valid, 3454 SdHoareTripleChecker+Invalid, 3566 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 3412 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 97 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-02-15 14:42:54,386 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [306 Valid, 3454 Invalid, 3566 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 3412 Invalid, 0 Unknown, 97 Unchecked, 1.2s Time] [2022-02-15 14:42:54,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12305 states. [2022-02-15 14:42:54,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12305 to 7144. [2022-02-15 14:42:54,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7144 states, 7143 states have (on average 3.037239255214896) internal successors, (21695), 7143 states have internal predecessors, (21695), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:42:54,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7144 states to 7144 states and 21695 transitions. [2022-02-15 14:42:54,516 INFO L78 Accepts]: Start accepts. Automaton has 7144 states and 21695 transitions. Word has length 48 [2022-02-15 14:42:54,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:42:54,516 INFO L470 AbstractCegarLoop]: Abstraction has 7144 states and 21695 transitions. [2022-02-15 14:42:54,516 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 2.1818181818181817) internal successors, (120), 54 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:42:54,516 INFO L276 IsEmpty]: Start isEmpty. Operand 7144 states and 21695 transitions. [2022-02-15 14:42:54,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-02-15 14:42:54,525 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:42:54,525 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:42:54,541 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Forceful destruction successful, exit code 0 [2022-02-15 14:42:54,725 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 95 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable97 [2022-02-15 14:42:54,725 INFO L402 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 14:42:54,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:42:54,726 INFO L85 PathProgramCache]: Analyzing trace with hash -1859036179, now seen corresponding path program 7 times [2022-02-15 14:42:54,726 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:42:54,726 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1309956539] [2022-02-15 14:42:54,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:42:54,726 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:42:54,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:42:55,242 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:42:55,243 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:42:55,243 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1309956539] [2022-02-15 14:42:55,243 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1309956539] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:42:55,243 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1360667470] [2022-02-15 14:42:55,243 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-15 14:42:55,243 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:42:55,243 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:42:55,245 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) [2022-02-15 14:42:55,245 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Waiting until timeout for monitored process [2022-02-15 14:42:55,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:42:55,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2022-02-15 14:42:55,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:42:55,468 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-02-15 14:42:55,652 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-02-15 14:42:56,136 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:42:56,136 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:42:56,867 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:42:56,868 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 36 [2022-02-15 14:42:57,000 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:42:57,000 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 39 [2022-02-15 14:42:57,235 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:42:57,236 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1360667470] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:42:57,236 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:42:57,236 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20, 20] total 54 [2022-02-15 14:42:57,236 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2073181350] [2022-02-15 14:42:57,236 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:42:57,236 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2022-02-15 14:42:57,236 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:42:57,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2022-02-15 14:42:57,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=225, Invalid=2745, Unknown=0, NotChecked=0, Total=2970 [2022-02-15 14:42:57,237 INFO L87 Difference]: Start difference. First operand 7144 states and 21695 transitions. Second operand has 55 states, 55 states have (on average 2.1818181818181817) internal successors, (120), 54 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:42:59,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:42:59,672 INFO L93 Difference]: Finished difference Result 15325 states and 45842 transitions. [2022-02-15 14:42:59,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-02-15 14:42:59,673 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 2.1818181818181817) internal successors, (120), 54 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2022-02-15 14:42:59,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:42:59,703 INFO L225 Difference]: With dead ends: 15325 [2022-02-15 14:42:59,703 INFO L226 Difference]: Without dead ends: 15255 [2022-02-15 14:42:59,704 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 59 SyntacticMatches, 6 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1965 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=522, Invalid=6120, Unknown=0, NotChecked=0, Total=6642 [2022-02-15 14:42:59,704 INFO L933 BasicCegarLoop]: 122 mSDtfsCounter, 379 mSDsluCounter, 3212 mSDsCounter, 0 mSdLazyCounter, 2919 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 379 SdHoareTripleChecker+Valid, 2677 SdHoareTripleChecker+Invalid, 3258 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 2919 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 262 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-02-15 14:42:59,704 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [379 Valid, 2677 Invalid, 3258 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 2919 Invalid, 0 Unknown, 262 Unchecked, 1.1s Time] [2022-02-15 14:42:59,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15255 states. [2022-02-15 14:42:59,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15255 to 7136. [2022-02-15 14:42:59,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7136 states, 7135 states have (on average 3.037000700770848) internal successors, (21669), 7135 states have internal predecessors, (21669), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:42:59,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7136 states to 7136 states and 21669 transitions. [2022-02-15 14:42:59,875 INFO L78 Accepts]: Start accepts. Automaton has 7136 states and 21669 transitions. Word has length 48 [2022-02-15 14:42:59,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:42:59,875 INFO L470 AbstractCegarLoop]: Abstraction has 7136 states and 21669 transitions. [2022-02-15 14:42:59,875 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 2.1818181818181817) internal successors, (120), 54 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:42:59,876 INFO L276 IsEmpty]: Start isEmpty. Operand 7136 states and 21669 transitions. [2022-02-15 14:42:59,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-02-15 14:42:59,884 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:42:59,884 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:42:59,899 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Ended with exit code 0 [2022-02-15 14:43:00,085 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable98 [2022-02-15 14:43:00,085 INFO L402 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 14:43:00,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:43:00,085 INFO L85 PathProgramCache]: Analyzing trace with hash -2098203905, now seen corresponding path program 8 times [2022-02-15 14:43:00,086 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:43:00,086 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1273929451] [2022-02-15 14:43:00,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:43:00,086 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:43:00,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:43:00,611 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:43:00,611 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:43:00,611 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1273929451] [2022-02-15 14:43:00,611 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1273929451] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:43:00,611 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1004670598] [2022-02-15 14:43:00,611 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-15 14:43:00,611 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:43:00,611 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:43:00,612 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) [2022-02-15 14:43:00,613 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Waiting until timeout for monitored process [2022-02-15 14:43:00,639 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-15 14:43:00,639 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:43:00,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2022-02-15 14:43:00,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:43:00,835 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 11 treesize of output 7 [2022-02-15 14:43:01,017 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 11 treesize of output 7 [2022-02-15 14:43:01,478 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:43:01,478 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:43:02,254 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:43:02,255 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 36 [2022-02-15 14:43:02,386 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:43:02,386 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 39 [2022-02-15 14:43:02,620 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:43:02,621 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1004670598] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:43:02,621 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:43:02,621 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20, 20] total 54 [2022-02-15 14:43:02,621 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2141105100] [2022-02-15 14:43:02,621 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:43:02,621 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2022-02-15 14:43:02,621 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:43:02,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2022-02-15 14:43:02,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=225, Invalid=2745, Unknown=0, NotChecked=0, Total=2970 [2022-02-15 14:43:02,622 INFO L87 Difference]: Start difference. First operand 7136 states and 21669 transitions. Second operand has 55 states, 55 states have (on average 2.2) internal successors, (121), 54 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:43:05,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:43:05,507 INFO L93 Difference]: Finished difference Result 15286 states and 45733 transitions. [2022-02-15 14:43:05,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-02-15 14:43:05,507 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 2.2) internal successors, (121), 54 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2022-02-15 14:43:05,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:43:05,531 INFO L225 Difference]: With dead ends: 15286 [2022-02-15 14:43:05,531 INFO L226 Difference]: Without dead ends: 15253 [2022-02-15 14:43:05,531 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 58 SyntacticMatches, 5 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2025 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=539, Invalid=6433, Unknown=0, NotChecked=0, Total=6972 [2022-02-15 14:43:05,532 INFO L933 BasicCegarLoop]: 123 mSDtfsCounter, 325 mSDsluCounter, 3845 mSDsCounter, 0 mSdLazyCounter, 3945 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 325 SdHoareTripleChecker+Valid, 3089 SdHoareTripleChecker+Invalid, 4027 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 3945 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-02-15 14:43:05,532 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [325 Valid, 3089 Invalid, 4027 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 3945 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-02-15 14:43:05,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15253 states. [2022-02-15 14:43:05,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15253 to 7124. [2022-02-15 14:43:05,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7124 states, 7123 states have (on average 3.0380457672329073) internal successors, (21640), 7123 states have internal predecessors, (21640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:43:05,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7124 states to 7124 states and 21640 transitions. [2022-02-15 14:43:05,686 INFO L78 Accepts]: Start accepts. Automaton has 7124 states and 21640 transitions. Word has length 48 [2022-02-15 14:43:05,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:43:05,686 INFO L470 AbstractCegarLoop]: Abstraction has 7124 states and 21640 transitions. [2022-02-15 14:43:05,687 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 2.2) internal successors, (121), 54 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:43:05,687 INFO L276 IsEmpty]: Start isEmpty. Operand 7124 states and 21640 transitions. [2022-02-15 14:43:05,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-02-15 14:43:05,695 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:43:05,695 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:43:05,711 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Forceful destruction successful, exit code 0 [2022-02-15 14:43:05,896 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable99 [2022-02-15 14:43:05,896 INFO L402 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 14:43:05,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:43:05,896 INFO L85 PathProgramCache]: Analyzing trace with hash -778563351, now seen corresponding path program 9 times [2022-02-15 14:43:05,896 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:43:05,896 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1960843665] [2022-02-15 14:43:05,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:43:05,896 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:43:05,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:43:06,417 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:43:06,417 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:43:06,417 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1960843665] [2022-02-15 14:43:06,417 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1960843665] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:43:06,417 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1654947266] [2022-02-15 14:43:06,417 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-15 14:43:06,417 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:43:06,417 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:43:06,418 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) [2022-02-15 14:43:06,418 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Waiting until timeout for monitored process [2022-02-15 14:43:06,445 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-02-15 14:43:06,445 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:43:06,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2022-02-15 14:43:06,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:43:06,661 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 15 treesize of output 7 [2022-02-15 14:43:06,845 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 11 treesize of output 7 [2022-02-15 14:43:07,322 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:43:07,322 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:43:08,082 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:43:08,082 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 34 treesize of output 36 [2022-02-15 14:43:08,206 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:43:08,206 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 39 [2022-02-15 14:43:08,441 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:43:08,441 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1654947266] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:43:08,441 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:43:08,441 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20, 20] total 54 [2022-02-15 14:43:08,441 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1181313522] [2022-02-15 14:43:08,441 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:43:08,442 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2022-02-15 14:43:08,442 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:43:08,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2022-02-15 14:43:08,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=224, Invalid=2746, Unknown=0, NotChecked=0, Total=2970 [2022-02-15 14:43:08,442 INFO L87 Difference]: Start difference. First operand 7124 states and 21640 transitions. Second operand has 55 states, 55 states have (on average 2.1818181818181817) internal successors, (120), 54 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:43:11,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:43:11,125 INFO L93 Difference]: Finished difference Result 15265 states and 45703 transitions. [2022-02-15 14:43:11,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-02-15 14:43:11,125 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 2.1818181818181817) internal successors, (120), 54 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2022-02-15 14:43:11,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:43:11,154 INFO L225 Difference]: With dead ends: 15265 [2022-02-15 14:43:11,154 INFO L226 Difference]: Without dead ends: 15167 [2022-02-15 14:43:11,155 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 57 SyntacticMatches, 6 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2052 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=570, Invalid=6570, Unknown=0, NotChecked=0, Total=7140 [2022-02-15 14:43:11,155 INFO L933 BasicCegarLoop]: 121 mSDtfsCounter, 343 mSDsluCounter, 3328 mSDsCounter, 0 mSdLazyCounter, 3338 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 343 SdHoareTripleChecker+Valid, 2658 SdHoareTripleChecker+Invalid, 3427 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 3338 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-02-15 14:43:11,155 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [343 Valid, 2658 Invalid, 3427 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 3338 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-02-15 14:43:11,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15167 states. [2022-02-15 14:43:11,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15167 to 7104. [2022-02-15 14:43:11,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7104 states, 7103 states have (on average 3.040546248064198) internal successors, (21597), 7103 states have internal predecessors, (21597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:43:11,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7104 states to 7104 states and 21597 transitions. [2022-02-15 14:43:11,358 INFO L78 Accepts]: Start accepts. Automaton has 7104 states and 21597 transitions. Word has length 48 [2022-02-15 14:43:11,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:43:11,358 INFO L470 AbstractCegarLoop]: Abstraction has 7104 states and 21597 transitions. [2022-02-15 14:43:11,358 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 2.1818181818181817) internal successors, (120), 54 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:43:11,359 INFO L276 IsEmpty]: Start isEmpty. Operand 7104 states and 21597 transitions. [2022-02-15 14:43:11,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-02-15 14:43:11,366 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:43:11,366 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:43:11,381 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Forceful destruction successful, exit code 0 [2022-02-15 14:43:11,567 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100,98 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:43:11,567 INFO L402 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 14:43:11,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:43:11,568 INFO L85 PathProgramCache]: Analyzing trace with hash 236808205, now seen corresponding path program 10 times [2022-02-15 14:43:11,568 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:43:11,568 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2004253132] [2022-02-15 14:43:11,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:43:11,568 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:43:11,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:43:12,092 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:43:12,093 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:43:12,093 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2004253132] [2022-02-15 14:43:12,093 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2004253132] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:43:12,093 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1713442080] [2022-02-15 14:43:12,093 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-15 14:43:12,093 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:43:12,093 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:43:12,094 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) [2022-02-15 14:43:12,094 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Waiting until timeout for monitored process [2022-02-15 14:43:12,122 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-15 14:43:12,122 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:43:12,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2022-02-15 14:43:12,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:43:12,319 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 15 treesize of output 7 [2022-02-15 14:43:12,510 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-02-15 14:43:13,064 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:43:13,064 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:43:13,785 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:43:13,785 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 36 [2022-02-15 14:43:13,918 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:43:13,918 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 37 treesize of output 39 [2022-02-15 14:43:14,150 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:43:14,151 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1713442080] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:43:14,151 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:43:14,151 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20, 20] total 53 [2022-02-15 14:43:14,151 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428631679] [2022-02-15 14:43:14,151 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:43:14,151 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2022-02-15 14:43:14,151 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:43:14,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2022-02-15 14:43:14,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=222, Invalid=2640, Unknown=0, NotChecked=0, Total=2862 [2022-02-15 14:43:14,152 INFO L87 Difference]: Start difference. First operand 7104 states and 21597 transitions. Second operand has 54 states, 54 states have (on average 2.185185185185185) internal successors, (118), 53 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:43:16,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:43:16,863 INFO L93 Difference]: Finished difference Result 15437 states and 46119 transitions. [2022-02-15 14:43:16,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-02-15 14:43:16,863 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 2.185185185185185) internal successors, (118), 53 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2022-02-15 14:43:16,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:43:16,892 INFO L225 Difference]: With dead ends: 15437 [2022-02-15 14:43:16,892 INFO L226 Difference]: Without dead ends: 15376 [2022-02-15 14:43:16,892 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 57 SyntacticMatches, 9 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2193 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=542, Invalid=6598, Unknown=0, NotChecked=0, Total=7140 [2022-02-15 14:43:16,892 INFO L933 BasicCegarLoop]: 127 mSDtfsCounter, 360 mSDsluCounter, 3833 mSDsCounter, 0 mSdLazyCounter, 3496 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 360 SdHoareTripleChecker+Valid, 2939 SdHoareTripleChecker+Invalid, 3845 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 3496 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 276 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-02-15 14:43:16,892 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [360 Valid, 2939 Invalid, 3845 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 3496 Invalid, 0 Unknown, 276 Unchecked, 1.3s Time] [2022-02-15 14:43:16,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15376 states. [2022-02-15 14:43:17,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15376 to 7220. [2022-02-15 14:43:17,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7220 states, 7219 states have (on average 3.029089901648428) internal successors, (21867), 7219 states have internal predecessors, (21867), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:43:17,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7220 states to 7220 states and 21867 transitions. [2022-02-15 14:43:17,076 INFO L78 Accepts]: Start accepts. Automaton has 7220 states and 21867 transitions. Word has length 48 [2022-02-15 14:43:17,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:43:17,076 INFO L470 AbstractCegarLoop]: Abstraction has 7220 states and 21867 transitions. [2022-02-15 14:43:17,076 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 2.185185185185185) internal successors, (118), 53 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:43:17,076 INFO L276 IsEmpty]: Start isEmpty. Operand 7220 states and 21867 transitions. [2022-02-15 14:43:17,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-02-15 14:43:17,085 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:43:17,085 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:43:17,100 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Forceful destruction successful, exit code 0 [2022-02-15 14:43:17,285 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 99 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable101 [2022-02-15 14:43:17,285 INFO L402 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 14:43:17,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:43:17,286 INFO L85 PathProgramCache]: Analyzing trace with hash -834397847, now seen corresponding path program 11 times [2022-02-15 14:43:17,286 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:43:17,286 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1230763175] [2022-02-15 14:43:17,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:43:17,286 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:43:17,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:43:17,819 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:43:17,819 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:43:17,819 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1230763175] [2022-02-15 14:43:17,819 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1230763175] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:43:17,819 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [885777067] [2022-02-15 14:43:17,819 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-15 14:43:17,819 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:43:17,820 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:43:17,820 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) [2022-02-15 14:43:17,821 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Waiting until timeout for monitored process [2022-02-15 14:43:17,847 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-02-15 14:43:17,847 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:43:17,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 44 conjunts are in the unsatisfiable core [2022-02-15 14:43:17,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:43:18,049 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-02-15 14:43:18,240 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-02-15 14:43:18,812 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:43:18,813 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:43:19,540 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:43:19,540 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 34 treesize of output 36 [2022-02-15 14:43:19,675 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:43:19,675 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 37 treesize of output 39 [2022-02-15 14:43:19,924 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:43:19,924 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [885777067] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:43:19,924 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:43:19,924 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20, 20] total 53 [2022-02-15 14:43:19,924 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605321810] [2022-02-15 14:43:19,924 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:43:19,924 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2022-02-15 14:43:19,924 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:43:19,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2022-02-15 14:43:19,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=222, Invalid=2640, Unknown=0, NotChecked=0, Total=2862 [2022-02-15 14:43:19,925 INFO L87 Difference]: Start difference. First operand 7220 states and 21867 transitions. Second operand has 54 states, 54 states have (on average 2.185185185185185) internal successors, (118), 53 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:43:22,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:43:22,799 INFO L93 Difference]: Finished difference Result 15376 states and 45967 transitions. [2022-02-15 14:43:22,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-02-15 14:43:22,800 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 2.185185185185185) internal successors, (118), 53 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2022-02-15 14:43:22,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:43:22,826 INFO L225 Difference]: With dead ends: 15376 [2022-02-15 14:43:22,826 INFO L226 Difference]: Without dead ends: 15269 [2022-02-15 14:43:22,827 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 53 SyntacticMatches, 11 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2257 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=542, Invalid=6598, Unknown=0, NotChecked=0, Total=7140 [2022-02-15 14:43:22,827 INFO L933 BasicCegarLoop]: 129 mSDtfsCounter, 363 mSDsluCounter, 3964 mSDsCounter, 0 mSdLazyCounter, 3936 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 363 SdHoareTripleChecker+Valid, 3159 SdHoareTripleChecker+Invalid, 4010 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 3936 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-02-15 14:43:22,827 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [363 Valid, 3159 Invalid, 4010 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 3936 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-02-15 14:43:22,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15269 states. [2022-02-15 14:43:22,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15269 to 7164. [2022-02-15 14:43:22,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7164 states, 7163 states have (on average 3.034063939690074) internal successors, (21733), 7163 states have internal predecessors, (21733), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:43:23,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7164 states to 7164 states and 21733 transitions. [2022-02-15 14:43:23,003 INFO L78 Accepts]: Start accepts. Automaton has 7164 states and 21733 transitions. Word has length 48 [2022-02-15 14:43:23,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:43:23,003 INFO L470 AbstractCegarLoop]: Abstraction has 7164 states and 21733 transitions. [2022-02-15 14:43:23,003 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 2.185185185185185) internal successors, (118), 53 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:43:23,003 INFO L276 IsEmpty]: Start isEmpty. Operand 7164 states and 21733 transitions. [2022-02-15 14:43:23,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-02-15 14:43:23,012 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:43:23,012 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:43:23,027 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Forceful destruction successful, exit code 0 [2022-02-15 14:43:23,212 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102,100 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:43:23,212 INFO L402 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 14:43:23,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:43:23,213 INFO L85 PathProgramCache]: Analyzing trace with hash 201175157, now seen corresponding path program 12 times [2022-02-15 14:43:23,213 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:43:23,213 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2008717125] [2022-02-15 14:43:23,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:43:23,213 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:43:23,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:43:23,743 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:43:23,743 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:43:23,744 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2008717125] [2022-02-15 14:43:23,744 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2008717125] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:43:23,744 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [394581768] [2022-02-15 14:43:23,744 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-15 14:43:23,744 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:43:23,744 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:43:23,745 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) [2022-02-15 14:43:23,745 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Waiting until timeout for monitored process [2022-02-15 14:43:23,772 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-02-15 14:43:23,772 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:43:23,772 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 44 conjunts are in the unsatisfiable core [2022-02-15 14:43:23,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:43:23,966 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-02-15 14:43:24,216 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-02-15 14:43:24,750 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:43:24,750 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:43:25,591 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:43:25,591 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 34 treesize of output 36 [2022-02-15 14:43:25,729 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:43:25,729 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 42 [2022-02-15 14:43:25,973 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:43:25,973 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [394581768] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:43:25,973 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:43:25,973 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 22, 22] total 57 [2022-02-15 14:43:25,973 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1629595496] [2022-02-15 14:43:25,974 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:43:25,974 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2022-02-15 14:43:25,974 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:43:25,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2022-02-15 14:43:25,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=242, Invalid=3064, Unknown=0, NotChecked=0, Total=3306 [2022-02-15 14:43:25,974 INFO L87 Difference]: Start difference. First operand 7164 states and 21733 transitions. Second operand has 58 states, 58 states have (on average 2.0344827586206895) internal successors, (118), 57 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:43:30,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:43:30,325 INFO L93 Difference]: Finished difference Result 13727 states and 40870 transitions. [2022-02-15 14:43:30,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-02-15 14:43:30,325 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 2.0344827586206895) internal successors, (118), 57 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2022-02-15 14:43:30,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:43:30,347 INFO L225 Difference]: With dead ends: 13727 [2022-02-15 14:43:30,347 INFO L226 Difference]: Without dead ends: 13687 [2022-02-15 14:43:30,347 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 54 SyntacticMatches, 6 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2645 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=708, Invalid=8798, Unknown=0, NotChecked=0, Total=9506 [2022-02-15 14:43:30,347 INFO L933 BasicCegarLoop]: 119 mSDtfsCounter, 394 mSDsluCounter, 3836 mSDsCounter, 0 mSdLazyCounter, 4897 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 394 SdHoareTripleChecker+Valid, 2745 SdHoareTripleChecker+Invalid, 4990 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 4897 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-02-15 14:43:30,347 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [394 Valid, 2745 Invalid, 4990 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 4897 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-02-15 14:43:30,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13687 states. [2022-02-15 14:43:30,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13687 to 7182. [2022-02-15 14:43:30,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7182 states, 7181 states have (on average 3.0327252471800583) internal successors, (21778), 7181 states have internal predecessors, (21778), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:43:30,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7182 states to 7182 states and 21778 transitions. [2022-02-15 14:43:30,470 INFO L78 Accepts]: Start accepts. Automaton has 7182 states and 21778 transitions. Word has length 48 [2022-02-15 14:43:30,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:43:30,470 INFO L470 AbstractCegarLoop]: Abstraction has 7182 states and 21778 transitions. [2022-02-15 14:43:30,470 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 2.0344827586206895) internal successors, (118), 57 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:43:30,470 INFO L276 IsEmpty]: Start isEmpty. Operand 7182 states and 21778 transitions. [2022-02-15 14:43:30,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-02-15 14:43:30,478 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:43:30,478 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:43:30,494 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Forceful destruction successful, exit code 0 [2022-02-15 14:43:30,679 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 101 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2022-02-15 14:43:30,679 INFO L402 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 14:43:30,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:43:30,679 INFO L85 PathProgramCache]: Analyzing trace with hash -27583687, now seen corresponding path program 13 times [2022-02-15 14:43:30,679 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:43:30,679 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1261982138] [2022-02-15 14:43:30,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:43:30,679 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:43:30,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:43:31,230 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:43:31,231 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:43:31,231 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1261982138] [2022-02-15 14:43:31,231 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1261982138] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:43:31,231 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1718413862] [2022-02-15 14:43:31,231 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-15 14:43:31,231 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:43:31,231 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:43:31,232 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) [2022-02-15 14:43:31,233 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Waiting until timeout for monitored process [2022-02-15 14:43:31,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:43:31,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2022-02-15 14:43:31,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:43:31,451 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-02-15 14:43:31,657 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-02-15 14:43:32,248 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:43:32,248 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:43:32,962 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:43:32,963 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 36 [2022-02-15 14:43:33,095 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:43:33,096 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 37 treesize of output 39 [2022-02-15 14:43:33,345 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:43:33,346 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1718413862] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:43:33,346 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:43:33,346 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20, 20] total 53 [2022-02-15 14:43:33,346 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1679363214] [2022-02-15 14:43:33,346 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:43:33,346 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2022-02-15 14:43:33,346 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:43:33,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2022-02-15 14:43:33,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=220, Invalid=2642, Unknown=0, NotChecked=0, Total=2862 [2022-02-15 14:43:33,347 INFO L87 Difference]: Start difference. First operand 7182 states and 21778 transitions. Second operand has 54 states, 54 states have (on average 2.185185185185185) internal successors, (118), 53 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:43:35,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:43:35,907 INFO L93 Difference]: Finished difference Result 15331 states and 45899 transitions. [2022-02-15 14:43:35,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-02-15 14:43:35,907 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 2.185185185185185) internal successors, (118), 53 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2022-02-15 14:43:35,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:43:35,938 INFO L225 Difference]: With dead ends: 15331 [2022-02-15 14:43:35,938 INFO L226 Difference]: Without dead ends: 15286 [2022-02-15 14:43:35,939 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 53 SyntacticMatches, 11 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2056 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=497, Invalid=5983, Unknown=0, NotChecked=0, Total=6480 [2022-02-15 14:43:35,939 INFO L933 BasicCegarLoop]: 109 mSDtfsCounter, 317 mSDsluCounter, 3313 mSDsCounter, 0 mSdLazyCounter, 3455 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 317 SdHoareTripleChecker+Valid, 2563 SdHoareTripleChecker+Invalid, 3535 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 3455 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-02-15 14:43:35,939 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [317 Valid, 2563 Invalid, 3535 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 3455 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-02-15 14:43:35,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15286 states. [2022-02-15 14:43:36,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15286 to 7176. [2022-02-15 14:43:36,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7176 states, 7175 states have (on average 3.0326132404181183) internal successors, (21759), 7175 states have internal predecessors, (21759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:43:36,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7176 states to 7176 states and 21759 transitions. [2022-02-15 14:43:36,132 INFO L78 Accepts]: Start accepts. Automaton has 7176 states and 21759 transitions. Word has length 48 [2022-02-15 14:43:36,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:43:36,132 INFO L470 AbstractCegarLoop]: Abstraction has 7176 states and 21759 transitions. [2022-02-15 14:43:36,132 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 2.185185185185185) internal successors, (118), 53 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:43:36,132 INFO L276 IsEmpty]: Start isEmpty. Operand 7176 states and 21759 transitions. [2022-02-15 14:43:36,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-02-15 14:43:36,142 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:43:36,142 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:43:36,158 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Forceful destruction successful, exit code 0 [2022-02-15 14:43:36,342 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104,102 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:43:36,343 INFO L402 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 14:43:36,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:43:36,343 INFO L85 PathProgramCache]: Analyzing trace with hash -974315487, now seen corresponding path program 14 times [2022-02-15 14:43:36,343 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:43:36,343 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2000396454] [2022-02-15 14:43:36,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:43:36,343 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:43:36,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:43:36,874 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:43:36,874 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:43:36,874 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2000396454] [2022-02-15 14:43:36,874 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2000396454] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:43:36,874 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1941962221] [2022-02-15 14:43:36,874 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-15 14:43:36,875 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:43:36,875 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:43:36,875 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) [2022-02-15 14:43:36,876 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Waiting until timeout for monitored process [2022-02-15 14:43:36,903 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-15 14:43:36,903 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:43:36,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2022-02-15 14:43:36,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:43:37,094 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-02-15 14:43:37,285 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-02-15 14:43:37,801 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:43:37,801 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:43:38,545 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:43:38,545 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 36 [2022-02-15 14:43:38,667 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:43:38,667 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 37 treesize of output 39 [2022-02-15 14:43:38,886 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:43:38,886 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1941962221] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:43:38,887 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:43:38,887 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20, 20] total 54 [2022-02-15 14:43:38,887 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165451744] [2022-02-15 14:43:38,887 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:43:38,887 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2022-02-15 14:43:38,887 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:43:38,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2022-02-15 14:43:38,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=225, Invalid=2745, Unknown=0, NotChecked=0, Total=2970 [2022-02-15 14:43:38,887 INFO L87 Difference]: Start difference. First operand 7176 states and 21759 transitions. Second operand has 55 states, 55 states have (on average 2.1636363636363636) internal successors, (119), 54 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) [2022-02-15 14:43:41,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:43:41,355 INFO L93 Difference]: Finished difference Result 12406 states and 37302 transitions. [2022-02-15 14:43:41,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-02-15 14:43:41,356 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 2.1636363636363636) internal successors, (119), 54 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) Word has length 48 [2022-02-15 14:43:41,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:43:41,376 INFO L225 Difference]: With dead ends: 12406 [2022-02-15 14:43:41,376 INFO L226 Difference]: Without dead ends: 12374 [2022-02-15 14:43:41,377 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 59 SyntacticMatches, 19 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2072 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=470, Invalid=5230, Unknown=0, NotChecked=0, Total=5700 [2022-02-15 14:43:41,377 INFO L933 BasicCegarLoop]: 117 mSDtfsCounter, 337 mSDsluCounter, 3333 mSDsCounter, 0 mSdLazyCounter, 2747 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 337 SdHoareTripleChecker+Valid, 2645 SdHoareTripleChecker+Invalid, 3037 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 2747 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 241 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-02-15 14:43:41,377 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [337 Valid, 2645 Invalid, 3037 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 2747 Invalid, 0 Unknown, 241 Unchecked, 1.0s Time] [2022-02-15 14:43:41,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12374 states. [2022-02-15 14:43:41,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12374 to 7270. [2022-02-15 14:43:41,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7270 states, 7269 states have (on average 3.0215985692667493) internal successors, (21964), 7269 states have internal predecessors, (21964), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:43:41,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7270 states to 7270 states and 21964 transitions. [2022-02-15 14:43:41,509 INFO L78 Accepts]: Start accepts. Automaton has 7270 states and 21964 transitions. Word has length 48 [2022-02-15 14:43:41,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:43:41,509 INFO L470 AbstractCegarLoop]: Abstraction has 7270 states and 21964 transitions. [2022-02-15 14:43:41,509 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 2.1636363636363636) internal successors, (119), 54 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) [2022-02-15 14:43:41,509 INFO L276 IsEmpty]: Start isEmpty. Operand 7270 states and 21964 transitions. [2022-02-15 14:43:41,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-02-15 14:43:41,519 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:43:41,519 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:43:41,534 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Ended with exit code 0 [2022-02-15 14:43:41,719 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 103 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable105 [2022-02-15 14:43:41,719 INFO L402 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 14:43:41,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:43:41,720 INFO L85 PathProgramCache]: Analyzing trace with hash -826540769, now seen corresponding path program 15 times [2022-02-15 14:43:41,720 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:43:41,720 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1285220787] [2022-02-15 14:43:41,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:43:41,720 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:43:41,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:43:42,283 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:43:42,283 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:43:42,283 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1285220787] [2022-02-15 14:43:42,283 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1285220787] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:43:42,283 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [390334294] [2022-02-15 14:43:42,284 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-15 14:43:42,284 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:43:42,284 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:43:42,284 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) [2022-02-15 14:43:42,285 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Waiting until timeout for monitored process [2022-02-15 14:43:42,312 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-02-15 14:43:42,312 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:43:42,313 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 42 conjunts are in the unsatisfiable core [2022-02-15 14:43:42,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:43:42,506 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-02-15 14:43:42,689 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 11 treesize of output 7 [2022-02-15 14:43:43,216 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:43:43,216 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:43:43,985 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:43:43,985 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 36 [2022-02-15 14:43:44,123 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:43:44,123 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 39 [2022-02-15 14:43:44,354 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:43:44,354 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [390334294] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:43:44,354 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:43:44,354 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20, 20] total 54 [2022-02-15 14:43:44,354 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2083054069] [2022-02-15 14:43:44,354 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:43:44,354 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2022-02-15 14:43:44,354 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:43:44,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2022-02-15 14:43:44,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=225, Invalid=2745, Unknown=0, NotChecked=0, Total=2970 [2022-02-15 14:43:44,355 INFO L87 Difference]: Start difference. First operand 7270 states and 21964 transitions. Second operand has 55 states, 55 states have (on average 2.2363636363636363) internal successors, (123), 54 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:43:47,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:43:47,394 INFO L93 Difference]: Finished difference Result 15582 states and 46390 transitions. [2022-02-15 14:43:47,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-02-15 14:43:47,394 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 2.2363636363636363) internal successors, (123), 54 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2022-02-15 14:43:47,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:43:47,423 INFO L225 Difference]: With dead ends: 15582 [2022-02-15 14:43:47,423 INFO L226 Difference]: Without dead ends: 15439 [2022-02-15 14:43:47,424 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 55 SyntacticMatches, 8 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2175 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=544, Invalid=6596, Unknown=0, NotChecked=0, Total=7140 [2022-02-15 14:43:47,424 INFO L933 BasicCegarLoop]: 127 mSDtfsCounter, 366 mSDsluCounter, 4657 mSDsCounter, 0 mSdLazyCounter, 4268 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 366 SdHoareTripleChecker+Valid, 3546 SdHoareTripleChecker+Invalid, 4551 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 4268 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 207 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-02-15 14:43:47,424 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [366 Valid, 3546 Invalid, 4551 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 4268 Invalid, 0 Unknown, 207 Unchecked, 1.5s Time] [2022-02-15 14:43:47,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15439 states. [2022-02-15 14:43:47,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15439 to 7182. [2022-02-15 14:43:47,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7182 states, 7181 states have (on average 3.0318897089541847) internal successors, (21772), 7181 states have internal predecessors, (21772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:43:47,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7182 states to 7182 states and 21772 transitions. [2022-02-15 14:43:47,573 INFO L78 Accepts]: Start accepts. Automaton has 7182 states and 21772 transitions. Word has length 48 [2022-02-15 14:43:47,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:43:47,573 INFO L470 AbstractCegarLoop]: Abstraction has 7182 states and 21772 transitions. [2022-02-15 14:43:47,573 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 2.2363636363636363) internal successors, (123), 54 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:43:47,573 INFO L276 IsEmpty]: Start isEmpty. Operand 7182 states and 21772 transitions. [2022-02-15 14:43:47,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-02-15 14:43:47,582 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:43:47,582 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:43:47,598 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Ended with exit code 0 [2022-02-15 14:43:47,782 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106,104 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:43:47,783 INFO L402 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 14:43:47,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:43:47,783 INFO L85 PathProgramCache]: Analyzing trace with hash -1128753005, now seen corresponding path program 16 times [2022-02-15 14:43:47,783 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:43:47,783 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1186475091] [2022-02-15 14:43:47,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:43:47,783 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:43:47,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:43:48,308 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:43:48,308 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:43:48,308 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1186475091] [2022-02-15 14:43:48,308 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1186475091] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:43:48,308 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [392862927] [2022-02-15 14:43:48,308 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-15 14:43:48,309 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:43:48,309 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:43:48,309 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) [2022-02-15 14:43:48,310 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Waiting until timeout for monitored process [2022-02-15 14:43:48,335 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-15 14:43:48,335 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:43:48,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2022-02-15 14:43:48,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:43:48,526 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 15 treesize of output 7 [2022-02-15 14:43:48,711 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 15 treesize of output 7 [2022-02-15 14:43:49,215 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:43:49,215 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:43:49,960 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:43:49,961 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 36 [2022-02-15 14:43:50,092 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:43:50,092 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 37 treesize of output 39 [2022-02-15 14:43:50,309 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:43:50,310 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [392862927] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:43:50,310 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:43:50,310 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20, 20] total 54 [2022-02-15 14:43:50,310 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [108162405] [2022-02-15 14:43:50,310 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:43:50,310 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2022-02-15 14:43:50,310 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:43:50,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2022-02-15 14:43:50,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=225, Invalid=2745, Unknown=0, NotChecked=0, Total=2970 [2022-02-15 14:43:50,311 INFO L87 Difference]: Start difference. First operand 7182 states and 21772 transitions. Second operand has 55 states, 55 states have (on average 2.1636363636363636) internal successors, (119), 54 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) [2022-02-15 14:43:52,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:43:52,926 INFO L93 Difference]: Finished difference Result 15433 states and 46066 transitions. [2022-02-15 14:43:52,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-02-15 14:43:52,926 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 2.1636363636363636) internal successors, (119), 54 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) Word has length 48 [2022-02-15 14:43:52,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:43:52,953 INFO L225 Difference]: With dead ends: 15433 [2022-02-15 14:43:52,953 INFO L226 Difference]: Without dead ends: 15421 [2022-02-15 14:43:52,954 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 58 SyntacticMatches, 6 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2059 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=542, Invalid=6430, Unknown=0, NotChecked=0, Total=6972 [2022-02-15 14:43:52,954 INFO L933 BasicCegarLoop]: 120 mSDtfsCounter, 400 mSDsluCounter, 3604 mSDsCounter, 0 mSdLazyCounter, 3310 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 400 SdHoareTripleChecker+Valid, 2801 SdHoareTripleChecker+Invalid, 3633 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 3310 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 242 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-02-15 14:43:52,954 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [400 Valid, 2801 Invalid, 3633 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 3310 Invalid, 0 Unknown, 242 Unchecked, 1.2s Time] [2022-02-15 14:43:52,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15421 states. [2022-02-15 14:43:53,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15421 to 7218. [2022-02-15 14:43:53,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7218 states, 7217 states have (on average 3.0288208396840792) internal successors, (21859), 7217 states have internal predecessors, (21859), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:43:53,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7218 states to 7218 states and 21859 transitions. [2022-02-15 14:43:53,116 INFO L78 Accepts]: Start accepts. Automaton has 7218 states and 21859 transitions. Word has length 48 [2022-02-15 14:43:53,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:43:53,116 INFO L470 AbstractCegarLoop]: Abstraction has 7218 states and 21859 transitions. [2022-02-15 14:43:53,117 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 2.1636363636363636) internal successors, (119), 54 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) [2022-02-15 14:43:53,117 INFO L276 IsEmpty]: Start isEmpty. Operand 7218 states and 21859 transitions. [2022-02-15 14:43:53,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-02-15 14:43:53,126 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:43:53,126 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:43:53,141 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Forceful destruction successful, exit code 0 [2022-02-15 14:43:53,326 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107,105 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:43:53,326 INFO L402 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 14:43:53,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:43:53,326 INFO L85 PathProgramCache]: Analyzing trace with hash -1498757225, now seen corresponding path program 17 times [2022-02-15 14:43:53,327 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:43:53,327 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1244381271] [2022-02-15 14:43:53,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:43:53,327 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:43:53,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:43:53,885 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:43:53,886 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:43:53,886 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1244381271] [2022-02-15 14:43:53,886 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1244381271] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:43:53,886 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1927859053] [2022-02-15 14:43:53,886 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-15 14:43:53,886 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:43:53,886 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:43:53,887 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) [2022-02-15 14:43:53,887 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Waiting until timeout for monitored process [2022-02-15 14:43:53,914 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-02-15 14:43:53,914 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:43:53,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 44 conjunts are in the unsatisfiable core [2022-02-15 14:43:53,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:43:54,114 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-02-15 14:43:54,302 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-02-15 14:43:54,789 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:43:54,789 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:43:55,560 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:43:55,560 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 36 [2022-02-15 14:43:55,698 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:43:55,698 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 37 treesize of output 39 [2022-02-15 14:43:55,946 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:43:55,946 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1927859053] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:43:55,946 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:43:55,946 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20, 20] total 54 [2022-02-15 14:43:55,946 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287115741] [2022-02-15 14:43:55,946 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:43:55,947 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2022-02-15 14:43:55,947 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:43:55,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2022-02-15 14:43:55,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=225, Invalid=2745, Unknown=0, NotChecked=0, Total=2970 [2022-02-15 14:43:55,947 INFO L87 Difference]: Start difference. First operand 7218 states and 21859 transitions. Second operand has 55 states, 55 states have (on average 2.1636363636363636) internal successors, (119), 54 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) [2022-02-15 14:43:58,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:43:58,709 INFO L93 Difference]: Finished difference Result 15413 states and 46036 transitions. [2022-02-15 14:43:58,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-02-15 14:43:58,710 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 2.1636363636363636) internal successors, (119), 54 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) Word has length 48 [2022-02-15 14:43:58,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:43:58,734 INFO L225 Difference]: With dead ends: 15413 [2022-02-15 14:43:58,734 INFO L226 Difference]: Without dead ends: 15179 [2022-02-15 14:43:58,735 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 58 SyntacticMatches, 6 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2059 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=542, Invalid=6430, Unknown=0, NotChecked=0, Total=6972 [2022-02-15 14:43:58,735 INFO L933 BasicCegarLoop]: 121 mSDtfsCounter, 397 mSDsluCounter, 4049 mSDsCounter, 0 mSdLazyCounter, 3695 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 397 SdHoareTripleChecker+Valid, 3096 SdHoareTripleChecker+Invalid, 4061 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 3695 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 292 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-02-15 14:43:58,735 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [397 Valid, 3096 Invalid, 4061 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 3695 Invalid, 0 Unknown, 292 Unchecked, 1.4s Time] [2022-02-15 14:43:58,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15179 states. [2022-02-15 14:43:58,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15179 to 7116. [2022-02-15 14:43:58,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7116 states, 7115 states have (on average 3.036261419536191) internal successors, (21603), 7115 states have internal predecessors, (21603), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:43:58,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7116 states to 7116 states and 21603 transitions. [2022-02-15 14:43:58,882 INFO L78 Accepts]: Start accepts. Automaton has 7116 states and 21603 transitions. Word has length 48 [2022-02-15 14:43:58,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:43:58,882 INFO L470 AbstractCegarLoop]: Abstraction has 7116 states and 21603 transitions. [2022-02-15 14:43:58,882 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 2.1636363636363636) internal successors, (119), 54 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) [2022-02-15 14:43:58,883 INFO L276 IsEmpty]: Start isEmpty. Operand 7116 states and 21603 transitions. [2022-02-15 14:43:58,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-02-15 14:43:58,891 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:43:58,891 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:43:58,906 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Ended with exit code 0 [2022-02-15 14:43:59,091 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable108 [2022-02-15 14:43:59,091 INFO L402 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 14:43:59,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:43:59,092 INFO L85 PathProgramCache]: Analyzing trace with hash 766644457, now seen corresponding path program 18 times [2022-02-15 14:43:59,092 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:43:59,092 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1211594587] [2022-02-15 14:43:59,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:43:59,092 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:43:59,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:43:59,604 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:43:59,605 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:43:59,605 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1211594587] [2022-02-15 14:43:59,605 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1211594587] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:43:59,605 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1921454409] [2022-02-15 14:43:59,605 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-15 14:43:59,605 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:43:59,605 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:43:59,606 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) [2022-02-15 14:43:59,607 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Waiting until timeout for monitored process [2022-02-15 14:43:59,633 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-02-15 14:43:59,634 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:43:59,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2022-02-15 14:43:59,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:43:59,831 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-02-15 14:44:00,017 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 11 treesize of output 7 [2022-02-15 14:44:00,680 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:44:00,680 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:44:01,423 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:44:01,423 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 36 [2022-02-15 14:44:01,560 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:44:01,560 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 39 [2022-02-15 14:44:01,804 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:44:01,805 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1921454409] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:44:01,805 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:44:01,805 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20, 20] total 53 [2022-02-15 14:44:01,805 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [266120536] [2022-02-15 14:44:01,805 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:44:01,805 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2022-02-15 14:44:01,805 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:44:01,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2022-02-15 14:44:01,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=215, Invalid=2647, Unknown=0, NotChecked=0, Total=2862 [2022-02-15 14:44:01,806 INFO L87 Difference]: Start difference. First operand 7116 states and 21603 transitions. Second operand has 54 states, 54 states have (on average 2.185185185185185) internal successors, (118), 53 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:44:04,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:44:04,699 INFO L93 Difference]: Finished difference Result 12676 states and 38259 transitions. [2022-02-15 14:44:04,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-02-15 14:44:04,699 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 2.185185185185185) internal successors, (118), 53 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2022-02-15 14:44:04,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:44:04,721 INFO L225 Difference]: With dead ends: 12676 [2022-02-15 14:44:04,721 INFO L226 Difference]: Without dead ends: 12641 [2022-02-15 14:44:04,721 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 53 SyntacticMatches, 11 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1994 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=557, Invalid=6085, Unknown=0, NotChecked=0, Total=6642 [2022-02-15 14:44:04,722 INFO L933 BasicCegarLoop]: 102 mSDtfsCounter, 343 mSDsluCounter, 3359 mSDsCounter, 0 mSdLazyCounter, 3679 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 343 SdHoareTripleChecker+Valid, 2699 SdHoareTripleChecker+Invalid, 3769 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 3679 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-02-15 14:44:04,722 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [343 Valid, 2699 Invalid, 3769 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 3679 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-02-15 14:44:04,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12641 states. [2022-02-15 14:44:04,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12641 to 7124. [2022-02-15 14:44:04,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7124 states, 7123 states have (on average 3.0355187421030463) internal successors, (21622), 7123 states have internal predecessors, (21622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:44:04,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7124 states to 7124 states and 21622 transitions. [2022-02-15 14:44:04,852 INFO L78 Accepts]: Start accepts. Automaton has 7124 states and 21622 transitions. Word has length 48 [2022-02-15 14:44:04,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:44:04,852 INFO L470 AbstractCegarLoop]: Abstraction has 7124 states and 21622 transitions. [2022-02-15 14:44:04,852 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 2.185185185185185) internal successors, (118), 53 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:44:04,852 INFO L276 IsEmpty]: Start isEmpty. Operand 7124 states and 21622 transitions. [2022-02-15 14:44:04,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-02-15 14:44:04,861 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:44:04,861 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:44:04,876 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Forceful destruction successful, exit code 0 [2022-02-15 14:44:05,061 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109,107 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:44:05,062 INFO L402 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 14:44:05,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:44:05,062 INFO L85 PathProgramCache]: Analyzing trace with hash 1642826921, now seen corresponding path program 19 times [2022-02-15 14:44:05,062 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:44:05,062 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [13353918] [2022-02-15 14:44:05,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:44:05,062 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:44:05,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:44:05,594 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:44:05,595 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:44:05,595 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [13353918] [2022-02-15 14:44:05,595 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [13353918] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:44:05,595 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [472256296] [2022-02-15 14:44:05,595 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-15 14:44:05,595 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:44:05,595 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:44:05,596 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) [2022-02-15 14:44:05,596 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Waiting until timeout for monitored process [2022-02-15 14:44:05,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:44:05,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2022-02-15 14:44:05,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:44:05,820 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-02-15 14:44:06,007 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 15 treesize of output 7 [2022-02-15 14:44:06,554 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:44:06,554 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:44:07,286 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:44:07,287 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 34 treesize of output 36 [2022-02-15 14:44:07,407 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:44:07,407 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 39 [2022-02-15 14:44:07,627 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:44:07,627 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [472256296] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:44:07,627 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:44:07,627 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20, 20] total 53 [2022-02-15 14:44:07,627 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [73891374] [2022-02-15 14:44:07,627 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:44:07,628 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2022-02-15 14:44:07,628 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:44:07,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2022-02-15 14:44:07,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=216, Invalid=2646, Unknown=0, NotChecked=0, Total=2862 [2022-02-15 14:44:07,628 INFO L87 Difference]: Start difference. First operand 7124 states and 21622 transitions. Second operand has 54 states, 54 states have (on average 2.185185185185185) internal successors, (118), 53 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:44:10,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:44:10,289 INFO L93 Difference]: Finished difference Result 12707 states and 38318 transitions. [2022-02-15 14:44:10,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-02-15 14:44:10,289 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 2.185185185185185) internal successors, (118), 53 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2022-02-15 14:44:10,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:44:10,311 INFO L225 Difference]: With dead ends: 12707 [2022-02-15 14:44:10,311 INFO L226 Difference]: Without dead ends: 12663 [2022-02-15 14:44:10,311 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 57 SyntacticMatches, 7 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1769 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=533, Invalid=5629, Unknown=0, NotChecked=0, Total=6162 [2022-02-15 14:44:10,311 INFO L933 BasicCegarLoop]: 104 mSDtfsCounter, 356 mSDsluCounter, 3150 mSDsCounter, 0 mSdLazyCounter, 3264 mSolverCounterSat, 103 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 356 SdHoareTripleChecker+Valid, 2571 SdHoareTripleChecker+Invalid, 3426 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 3264 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 59 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-02-15 14:44:10,311 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [356 Valid, 2571 Invalid, 3426 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [103 Valid, 3264 Invalid, 0 Unknown, 59 Unchecked, 1.2s Time] [2022-02-15 14:44:10,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12663 states. [2022-02-15 14:44:10,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12663 to 7120. [2022-02-15 14:44:10,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7120 states, 7119 states have (on average 3.0361005759235846) internal successors, (21614), 7119 states have internal predecessors, (21614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:44:10,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7120 states to 7120 states and 21614 transitions. [2022-02-15 14:44:10,437 INFO L78 Accepts]: Start accepts. Automaton has 7120 states and 21614 transitions. Word has length 48 [2022-02-15 14:44:10,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:44:10,438 INFO L470 AbstractCegarLoop]: Abstraction has 7120 states and 21614 transitions. [2022-02-15 14:44:10,438 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 2.185185185185185) internal successors, (118), 53 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:44:10,438 INFO L276 IsEmpty]: Start isEmpty. Operand 7120 states and 21614 transitions. [2022-02-15 14:44:10,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-02-15 14:44:10,446 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:44:10,446 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:44:10,462 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Ended with exit code 0 [2022-02-15 14:44:10,647 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,108 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:44:10,647 INFO L402 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 14:44:10,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:44:10,647 INFO L85 PathProgramCache]: Analyzing trace with hash -460309207, now seen corresponding path program 20 times [2022-02-15 14:44:10,647 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:44:10,647 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1558888938] [2022-02-15 14:44:10,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:44:10,647 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:44:10,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:44:11,230 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:44:11,230 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:44:11,230 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1558888938] [2022-02-15 14:44:11,230 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1558888938] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:44:11,230 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [356521215] [2022-02-15 14:44:11,230 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-15 14:44:11,230 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:44:11,230 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:44:11,231 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) [2022-02-15 14:44:11,238 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Waiting until timeout for monitored process [2022-02-15 14:44:11,261 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-15 14:44:11,261 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:44:11,262 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2022-02-15 14:44:11,263 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:44:11,455 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-02-15 14:44:11,640 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-02-15 14:44:12,136 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:44:12,136 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:44:12,828 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:44:12,828 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 34 treesize of output 36 [2022-02-15 14:44:12,961 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:44:12,962 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 39 [2022-02-15 14:44:13,227 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:44:13,227 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [356521215] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:44:13,227 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:44:13,228 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20, 20] total 53 [2022-02-15 14:44:13,228 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [891056548] [2022-02-15 14:44:13,228 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:44:13,228 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2022-02-15 14:44:13,228 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:44:13,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2022-02-15 14:44:13,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=220, Invalid=2642, Unknown=0, NotChecked=0, Total=2862 [2022-02-15 14:44:13,228 INFO L87 Difference]: Start difference. First operand 7120 states and 21614 transitions. Second operand has 54 states, 54 states have (on average 2.185185185185185) internal successors, (118), 53 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:44:15,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:44:15,482 INFO L93 Difference]: Finished difference Result 15269 states and 45737 transitions. [2022-02-15 14:44:15,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-02-15 14:44:15,483 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 2.185185185185185) internal successors, (118), 53 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2022-02-15 14:44:15,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:44:15,509 INFO L225 Difference]: With dead ends: 15269 [2022-02-15 14:44:15,509 INFO L226 Difference]: Without dead ends: 15234 [2022-02-15 14:44:15,509 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 58 SyntacticMatches, 6 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1816 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=482, Invalid=5680, Unknown=0, NotChecked=0, Total=6162 [2022-02-15 14:44:15,511 INFO L933 BasicCegarLoop]: 105 mSDtfsCounter, 298 mSDsluCounter, 2719 mSDsCounter, 0 mSdLazyCounter, 2874 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 298 SdHoareTripleChecker+Valid, 2215 SdHoareTripleChecker+Invalid, 2950 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 2874 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-02-15 14:44:15,511 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [298 Valid, 2215 Invalid, 2950 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 2874 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-02-15 14:44:15,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15234 states. [2022-02-15 14:44:15,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15234 to 7124. [2022-02-15 14:44:15,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7124 states, 7123 states have (on average 3.0355187421030463) internal successors, (21622), 7123 states have internal predecessors, (21622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:44:15,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7124 states to 7124 states and 21622 transitions. [2022-02-15 14:44:15,664 INFO L78 Accepts]: Start accepts. Automaton has 7124 states and 21622 transitions. Word has length 48 [2022-02-15 14:44:15,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:44:15,664 INFO L470 AbstractCegarLoop]: Abstraction has 7124 states and 21622 transitions. [2022-02-15 14:44:15,664 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 2.185185185185185) internal successors, (118), 53 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:44:15,664 INFO L276 IsEmpty]: Start isEmpty. Operand 7124 states and 21622 transitions. [2022-02-15 14:44:15,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-02-15 14:44:15,673 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:44:15,673 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:44:15,689 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Forceful destruction successful, exit code 0 [2022-02-15 14:44:15,873 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111,109 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:44:15,873 INFO L402 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 14:44:15,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:44:15,873 INFO L85 PathProgramCache]: Analyzing trace with hash 2001740685, now seen corresponding path program 21 times [2022-02-15 14:44:15,873 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:44:15,873 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [931274245] [2022-02-15 14:44:15,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:44:15,874 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:44:15,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:44:16,382 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:44:16,382 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:44:16,382 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [931274245] [2022-02-15 14:44:16,382 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [931274245] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:44:16,382 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1074355635] [2022-02-15 14:44:16,382 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-15 14:44:16,382 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:44:16,382 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:44:16,383 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) [2022-02-15 14:44:16,383 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Waiting until timeout for monitored process [2022-02-15 14:44:16,411 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-02-15 14:44:16,411 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:44:16,412 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 42 conjunts are in the unsatisfiable core [2022-02-15 14:44:16,413 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:44:16,605 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 11 treesize of output 7 [2022-02-15 14:44:16,791 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-02-15 14:44:17,408 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:44:17,408 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:44:18,140 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:44:18,140 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 34 treesize of output 36 [2022-02-15 14:44:18,264 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:44:18,264 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 39 [2022-02-15 14:44:18,502 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:44:18,502 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1074355635] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:44:18,502 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:44:18,502 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20, 20] total 53 [2022-02-15 14:44:18,502 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1794781147] [2022-02-15 14:44:18,502 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:44:18,503 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2022-02-15 14:44:18,503 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:44:18,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2022-02-15 14:44:18,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=220, Invalid=2642, Unknown=0, NotChecked=0, Total=2862 [2022-02-15 14:44:18,503 INFO L87 Difference]: Start difference. First operand 7124 states and 21622 transitions. Second operand has 54 states, 54 states have (on average 2.185185185185185) internal successors, (118), 53 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:44:20,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:44:20,875 INFO L93 Difference]: Finished difference Result 15273 states and 45743 transitions. [2022-02-15 14:44:20,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-02-15 14:44:20,875 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 2.185185185185185) internal successors, (118), 53 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2022-02-15 14:44:20,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:44:20,900 INFO L225 Difference]: With dead ends: 15273 [2022-02-15 14:44:20,901 INFO L226 Difference]: Without dead ends: 15230 [2022-02-15 14:44:20,901 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 51 SyntacticMatches, 13 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2027 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=482, Invalid=5680, Unknown=0, NotChecked=0, Total=6162 [2022-02-15 14:44:20,901 INFO L933 BasicCegarLoop]: 104 mSDtfsCounter, 313 mSDsluCounter, 3001 mSDsCounter, 0 mSdLazyCounter, 3161 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 313 SdHoareTripleChecker+Valid, 2366 SdHoareTripleChecker+Invalid, 3235 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 3161 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-02-15 14:44:20,901 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [313 Valid, 2366 Invalid, 3235 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 3161 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-02-15 14:44:20,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15230 states. [2022-02-15 14:44:21,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15230 to 7120. [2022-02-15 14:44:21,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7120 states, 7119 states have (on average 3.035819637589549) internal successors, (21612), 7119 states have internal predecessors, (21612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:44:21,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7120 states to 7120 states and 21612 transitions. [2022-02-15 14:44:21,052 INFO L78 Accepts]: Start accepts. Automaton has 7120 states and 21612 transitions. Word has length 48 [2022-02-15 14:44:21,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:44:21,052 INFO L470 AbstractCegarLoop]: Abstraction has 7120 states and 21612 transitions. [2022-02-15 14:44:21,052 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 2.185185185185185) internal successors, (118), 53 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:44:21,053 INFO L276 IsEmpty]: Start isEmpty. Operand 7120 states and 21612 transitions. [2022-02-15 14:44:21,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-02-15 14:44:21,061 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:44:21,061 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:44:21,077 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Forceful destruction successful, exit code 0 [2022-02-15 14:44:21,261 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable112 [2022-02-15 14:44:21,262 INFO L402 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 14:44:21,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:44:21,262 INFO L85 PathProgramCache]: Analyzing trace with hash 1145793037, now seen corresponding path program 22 times [2022-02-15 14:44:21,262 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:44:21,262 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [200070974] [2022-02-15 14:44:21,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:44:21,262 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:44:21,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:44:21,783 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:44:21,783 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:44:21,783 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [200070974] [2022-02-15 14:44:21,783 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [200070974] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:44:21,783 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [97279554] [2022-02-15 14:44:21,784 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-15 14:44:21,784 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:44:21,784 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:44:21,784 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) [2022-02-15 14:44:21,785 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Waiting until timeout for monitored process [2022-02-15 14:44:21,811 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-15 14:44:21,811 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:44:21,812 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2022-02-15 14:44:21,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:44:22,003 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-02-15 14:44:22,190 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-02-15 14:44:22,712 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:44:22,713 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:44:23,481 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:44:23,481 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 34 treesize of output 36 [2022-02-15 14:44:23,601 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:44:23,601 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 39 [2022-02-15 14:44:23,816 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:44:23,816 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [97279554] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:44:23,816 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:44:23,816 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20, 20] total 53 [2022-02-15 14:44:23,816 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143090515] [2022-02-15 14:44:23,816 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:44:23,816 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2022-02-15 14:44:23,816 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:44:23,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2022-02-15 14:44:23,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=216, Invalid=2646, Unknown=0, NotChecked=0, Total=2862 [2022-02-15 14:44:23,817 INFO L87 Difference]: Start difference. First operand 7120 states and 21612 transitions. Second operand has 54 states, 54 states have (on average 2.185185185185185) internal successors, (118), 53 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:44:26,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:44:26,712 INFO L93 Difference]: Finished difference Result 12712 states and 38324 transitions. [2022-02-15 14:44:26,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-02-15 14:44:26,713 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 2.185185185185185) internal successors, (118), 53 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2022-02-15 14:44:26,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:44:26,734 INFO L225 Difference]: With dead ends: 12712 [2022-02-15 14:44:26,734 INFO L226 Difference]: Without dead ends: 12672 [2022-02-15 14:44:26,734 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 56 SyntacticMatches, 8 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1881 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=550, Invalid=5930, Unknown=0, NotChecked=0, Total=6480 [2022-02-15 14:44:26,735 INFO L933 BasicCegarLoop]: 101 mSDtfsCounter, 369 mSDsluCounter, 3440 mSDsCounter, 0 mSdLazyCounter, 3751 mSolverCounterSat, 106 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 369 SdHoareTripleChecker+Valid, 2701 SdHoareTripleChecker+Invalid, 3857 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 106 IncrementalHoareTripleChecker+Valid, 3751 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-02-15 14:44:26,735 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [369 Valid, 2701 Invalid, 3857 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [106 Valid, 3751 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-02-15 14:44:26,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12672 states. [2022-02-15 14:44:26,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12672 to 7126. [2022-02-15 14:44:26,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7126 states, 7125 states have (on average 3.0350877192982457) internal successors, (21625), 7125 states have internal predecessors, (21625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:44:26,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7126 states to 7126 states and 21625 transitions. [2022-02-15 14:44:26,868 INFO L78 Accepts]: Start accepts. Automaton has 7126 states and 21625 transitions. Word has length 48 [2022-02-15 14:44:26,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:44:26,869 INFO L470 AbstractCegarLoop]: Abstraction has 7126 states and 21625 transitions. [2022-02-15 14:44:26,869 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 2.185185185185185) internal successors, (118), 53 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:44:26,869 INFO L276 IsEmpty]: Start isEmpty. Operand 7126 states and 21625 transitions. [2022-02-15 14:44:26,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-02-15 14:44:26,877 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:44:26,877 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:44:26,895 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Forceful destruction successful, exit code 0 [2022-02-15 14:44:27,079 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable113 [2022-02-15 14:44:27,079 INFO L402 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 14:44:27,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:44:27,079 INFO L85 PathProgramCache]: Analyzing trace with hash -520605549, now seen corresponding path program 23 times [2022-02-15 14:44:27,079 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:44:27,079 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [307630376] [2022-02-15 14:44:27,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:44:27,079 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:44:27,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:44:27,639 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:44:27,639 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:44:27,639 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [307630376] [2022-02-15 14:44:27,640 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [307630376] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:44:27,640 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1028814238] [2022-02-15 14:44:27,640 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-15 14:44:27,640 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:44:27,640 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:44:27,641 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) [2022-02-15 14:44:27,641 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Waiting until timeout for monitored process [2022-02-15 14:44:27,670 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-02-15 14:44:27,670 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:44:27,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 44 conjunts are in the unsatisfiable core [2022-02-15 14:44:27,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:44:27,869 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 11 treesize of output 7 [2022-02-15 14:44:28,069 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-02-15 14:44:28,701 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:44:28,701 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:44:29,458 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:44:29,459 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 36 [2022-02-15 14:44:29,592 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:44:29,592 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 39 [2022-02-15 14:44:29,828 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:44:29,828 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1028814238] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:44:29,828 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:44:29,828 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20, 20] total 53 [2022-02-15 14:44:29,828 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164451335] [2022-02-15 14:44:29,828 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:44:29,829 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2022-02-15 14:44:29,829 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:44:29,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2022-02-15 14:44:29,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=216, Invalid=2646, Unknown=0, NotChecked=0, Total=2862 [2022-02-15 14:44:29,829 INFO L87 Difference]: Start difference. First operand 7126 states and 21625 transitions. Second operand has 54 states, 54 states have (on average 2.185185185185185) internal successors, (118), 53 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:44:32,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:44:32,434 INFO L93 Difference]: Finished difference Result 12670 states and 38238 transitions. [2022-02-15 14:44:32,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-02-15 14:44:32,435 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 2.185185185185185) internal successors, (118), 53 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2022-02-15 14:44:32,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:44:32,456 INFO L225 Difference]: With dead ends: 12670 [2022-02-15 14:44:32,456 INFO L226 Difference]: Without dead ends: 12623 [2022-02-15 14:44:32,456 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 52 SyntacticMatches, 12 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1987 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=518, Invalid=5802, Unknown=0, NotChecked=0, Total=6320 [2022-02-15 14:44:32,457 INFO L933 BasicCegarLoop]: 99 mSDtfsCounter, 352 mSDsluCounter, 2663 mSDsCounter, 0 mSdLazyCounter, 3007 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 352 SdHoareTripleChecker+Valid, 2096 SdHoareTripleChecker+Invalid, 3092 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 3007 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-02-15 14:44:32,457 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [352 Valid, 2096 Invalid, 3092 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 3007 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-02-15 14:44:32,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12623 states. [2022-02-15 14:44:32,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12623 to 7118. [2022-02-15 14:44:32,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7118 states, 7117 states have (on average 3.0359702121680483) internal successors, (21607), 7117 states have internal predecessors, (21607), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:44:32,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7118 states to 7118 states and 21607 transitions. [2022-02-15 14:44:32,583 INFO L78 Accepts]: Start accepts. Automaton has 7118 states and 21607 transitions. Word has length 48 [2022-02-15 14:44:32,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:44:32,583 INFO L470 AbstractCegarLoop]: Abstraction has 7118 states and 21607 transitions. [2022-02-15 14:44:32,584 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 2.185185185185185) internal successors, (118), 53 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:44:32,584 INFO L276 IsEmpty]: Start isEmpty. Operand 7118 states and 21607 transitions. [2022-02-15 14:44:32,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-02-15 14:44:32,592 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:44:32,592 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:44:32,608 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Ended with exit code 0 [2022-02-15 14:44:32,793 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2022-02-15 14:44:32,793 INFO L402 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 14:44:32,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:44:32,793 INFO L85 PathProgramCache]: Analyzing trace with hash -1406766659, now seen corresponding path program 24 times [2022-02-15 14:44:32,793 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:44:32,793 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [580089014] [2022-02-15 14:44:32,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:44:32,793 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:44:32,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:44:33,316 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:44:33,316 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:44:33,316 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [580089014] [2022-02-15 14:44:33,316 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [580089014] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:44:33,316 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [404323562] [2022-02-15 14:44:33,316 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-15 14:44:33,316 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:44:33,317 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:44:33,317 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) [2022-02-15 14:44:33,318 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (113)] Waiting until timeout for monitored process [2022-02-15 14:44:33,345 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-02-15 14:44:33,345 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:44:33,346 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2022-02-15 14:44:33,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:44:33,546 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-02-15 14:44:33,735 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-02-15 14:44:34,234 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:44:34,234 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:44:34,996 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:44:34,996 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 36 [2022-02-15 14:44:35,117 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:44:35,117 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 39 [2022-02-15 14:44:35,338 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:44:35,338 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [404323562] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:44:35,338 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:44:35,338 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20, 20] total 54 [2022-02-15 14:44:35,338 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753289197] [2022-02-15 14:44:35,338 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:44:35,338 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2022-02-15 14:44:35,339 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:44:35,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2022-02-15 14:44:35,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=224, Invalid=2746, Unknown=0, NotChecked=0, Total=2970 [2022-02-15 14:44:35,339 INFO L87 Difference]: Start difference. First operand 7118 states and 21607 transitions. Second operand has 55 states, 55 states have (on average 2.1636363636363636) internal successors, (119), 54 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) [2022-02-15 14:44:37,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:44:37,911 INFO L93 Difference]: Finished difference Result 15326 states and 45856 transitions. [2022-02-15 14:44:37,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-02-15 14:44:37,911 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 2.1636363636363636) internal successors, (119), 54 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) Word has length 48 [2022-02-15 14:44:37,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:44:37,936 INFO L225 Difference]: With dead ends: 15326 [2022-02-15 14:44:37,936 INFO L226 Difference]: Without dead ends: 15291 [2022-02-15 14:44:37,936 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 57 SyntacticMatches, 6 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1991 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=553, Invalid=6419, Unknown=0, NotChecked=0, Total=6972 [2022-02-15 14:44:37,936 INFO L933 BasicCegarLoop]: 113 mSDtfsCounter, 363 mSDsluCounter, 3172 mSDsCounter, 0 mSdLazyCounter, 3207 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 363 SdHoareTripleChecker+Valid, 2570 SdHoareTripleChecker+Invalid, 3299 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 3207 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-02-15 14:44:37,936 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [363 Valid, 2570 Invalid, 3299 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 3207 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-02-15 14:44:37,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15291 states. [2022-02-15 14:44:38,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15291 to 7126. [2022-02-15 14:44:38,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7126 states, 7125 states have (on average 3.0350877192982457) internal successors, (21625), 7125 states have internal predecessors, (21625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:44:38,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7126 states to 7126 states and 21625 transitions. [2022-02-15 14:44:38,083 INFO L78 Accepts]: Start accepts. Automaton has 7126 states and 21625 transitions. Word has length 48 [2022-02-15 14:44:38,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:44:38,083 INFO L470 AbstractCegarLoop]: Abstraction has 7126 states and 21625 transitions. [2022-02-15 14:44:38,083 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 2.1636363636363636) internal successors, (119), 54 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) [2022-02-15 14:44:38,083 INFO L276 IsEmpty]: Start isEmpty. Operand 7126 states and 21625 transitions. [2022-02-15 14:44:38,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-02-15 14:44:38,091 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:44:38,091 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:44:38,107 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (113)] Forceful destruction successful, exit code 0 [2022-02-15 14:44:38,292 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable115 [2022-02-15 14:44:38,292 INFO L402 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 14:44:38,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:44:38,292 INFO L85 PathProgramCache]: Analyzing trace with hash -530584195, now seen corresponding path program 25 times [2022-02-15 14:44:38,292 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:44:38,292 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [109788418] [2022-02-15 14:44:38,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:44:38,292 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:44:38,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:44:38,822 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:44:38,822 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:44:38,822 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [109788418] [2022-02-15 14:44:38,822 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [109788418] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:44:38,822 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1494294038] [2022-02-15 14:44:38,822 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-15 14:44:38,822 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:44:38,822 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:44:38,823 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) [2022-02-15 14:44:38,823 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (114)] Waiting until timeout for monitored process [2022-02-15 14:44:38,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:44:38,850 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2022-02-15 14:44:38,851 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:44:39,045 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-02-15 14:44:39,235 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-02-15 14:44:39,804 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:44:39,804 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:44:40,594 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:44:40,594 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 34 treesize of output 36 [2022-02-15 14:44:40,726 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:44:40,726 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 37 treesize of output 39 [2022-02-15 14:44:40,956 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:44:40,956 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1494294038] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:44:40,956 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:44:40,956 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20, 20] total 54 [2022-02-15 14:44:40,957 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1503985596] [2022-02-15 14:44:40,957 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:44:40,957 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2022-02-15 14:44:40,957 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:44:40,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2022-02-15 14:44:40,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=221, Invalid=2749, Unknown=0, NotChecked=0, Total=2970 [2022-02-15 14:44:40,957 INFO L87 Difference]: Start difference. First operand 7126 states and 21625 transitions. Second operand has 55 states, 55 states have (on average 2.1636363636363636) internal successors, (119), 54 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) [2022-02-15 14:44:43,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:44:43,732 INFO L93 Difference]: Finished difference Result 12684 states and 38274 transitions. [2022-02-15 14:44:43,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-02-15 14:44:43,732 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 2.1636363636363636) internal successors, (119), 54 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) Word has length 48 [2022-02-15 14:44:43,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:44:43,753 INFO L225 Difference]: With dead ends: 12684 [2022-02-15 14:44:43,753 INFO L226 Difference]: Without dead ends: 12623 [2022-02-15 14:44:43,754 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 54 SyntacticMatches, 9 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1985 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=546, Invalid=6096, Unknown=0, NotChecked=0, Total=6642 [2022-02-15 14:44:43,754 INFO L933 BasicCegarLoop]: 108 mSDtfsCounter, 376 mSDsluCounter, 3344 mSDsCounter, 0 mSdLazyCounter, 3449 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 376 SdHoareTripleChecker+Valid, 2658 SdHoareTripleChecker+Invalid, 3549 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 3449 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-02-15 14:44:43,754 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [376 Valid, 2658 Invalid, 3549 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 3449 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-02-15 14:44:43,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12623 states. [2022-02-15 14:44:43,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12623 to 7118. [2022-02-15 14:44:43,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7118 states, 7117 states have (on average 3.0358297035267667) internal successors, (21606), 7117 states have internal predecessors, (21606), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:44:43,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7118 states to 7118 states and 21606 transitions. [2022-02-15 14:44:43,881 INFO L78 Accepts]: Start accepts. Automaton has 7118 states and 21606 transitions. Word has length 48 [2022-02-15 14:44:43,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:44:43,882 INFO L470 AbstractCegarLoop]: Abstraction has 7118 states and 21606 transitions. [2022-02-15 14:44:43,882 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 2.1636363636363636) internal successors, (119), 54 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) [2022-02-15 14:44:43,882 INFO L276 IsEmpty]: Start isEmpty. Operand 7118 states and 21606 transitions. [2022-02-15 14:44:43,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-02-15 14:44:43,891 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:44:43,891 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:44:43,906 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (114)] Ended with exit code 0 [2022-02-15 14:44:44,091 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116,114 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:44:44,091 INFO L402 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 14:44:44,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:44:44,092 INFO L85 PathProgramCache]: Analyzing trace with hash 743387921, now seen corresponding path program 26 times [2022-02-15 14:44:44,092 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:44:44,092 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [693653579] [2022-02-15 14:44:44,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:44:44,092 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:44:44,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:44:44,618 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:44:44,618 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:44:44,618 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [693653579] [2022-02-15 14:44:44,618 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [693653579] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:44:44,618 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [158882372] [2022-02-15 14:44:44,618 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-15 14:44:44,618 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:44:44,619 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:44:44,619 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) [2022-02-15 14:44:44,620 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (115)] Waiting until timeout for monitored process [2022-02-15 14:44:44,647 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-15 14:44:44,647 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:44:44,648 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2022-02-15 14:44:44,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:44:44,843 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-02-15 14:44:45,037 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 15 treesize of output 7 [2022-02-15 14:44:45,616 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:44:45,616 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:44:46,418 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:44:46,418 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 36 [2022-02-15 14:44:46,545 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:44:46,545 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 39 [2022-02-15 14:44:46,794 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:44:46,794 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [158882372] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:44:46,795 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:44:46,795 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20, 20] total 54 [2022-02-15 14:44:46,795 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1741762735] [2022-02-15 14:44:46,795 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:44:46,795 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2022-02-15 14:44:46,795 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:44:46,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2022-02-15 14:44:46,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=221, Invalid=2749, Unknown=0, NotChecked=0, Total=2970 [2022-02-15 14:44:46,796 INFO L87 Difference]: Start difference. First operand 7118 states and 21606 transitions. Second operand has 55 states, 55 states have (on average 2.1818181818181817) internal successors, (120), 54 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:44:49,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:44:49,474 INFO L93 Difference]: Finished difference Result 12769 states and 38446 transitions. [2022-02-15 14:44:49,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-02-15 14:44:49,475 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 2.1818181818181817) internal successors, (120), 54 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2022-02-15 14:44:49,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:44:49,495 INFO L225 Difference]: With dead ends: 12769 [2022-02-15 14:44:49,495 INFO L226 Difference]: Without dead ends: 12676 [2022-02-15 14:44:49,496 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 54 SyntacticMatches, 9 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2118 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=581, Invalid=6559, Unknown=0, NotChecked=0, Total=7140 [2022-02-15 14:44:49,496 INFO L933 BasicCegarLoop]: 106 mSDtfsCounter, 456 mSDsluCounter, 2795 mSDsCounter, 0 mSdLazyCounter, 2760 mSolverCounterSat, 108 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 456 SdHoareTripleChecker+Valid, 2191 SdHoareTripleChecker+Invalid, 2983 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 108 IncrementalHoareTripleChecker+Valid, 2760 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 115 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-02-15 14:44:49,496 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [456 Valid, 2191 Invalid, 2983 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [108 Valid, 2760 Invalid, 0 Unknown, 115 Unchecked, 1.0s Time] [2022-02-15 14:44:49,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12676 states. [2022-02-15 14:44:49,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12676 to 7130. [2022-02-15 14:44:49,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7130 states, 7129 states have (on average 3.0343666713424042) internal successors, (21632), 7129 states have internal predecessors, (21632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:44:49,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7130 states to 7130 states and 21632 transitions. [2022-02-15 14:44:49,625 INFO L78 Accepts]: Start accepts. Automaton has 7130 states and 21632 transitions. Word has length 48 [2022-02-15 14:44:49,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:44:49,625 INFO L470 AbstractCegarLoop]: Abstraction has 7130 states and 21632 transitions. [2022-02-15 14:44:49,625 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 2.1818181818181817) internal successors, (120), 54 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:44:49,625 INFO L276 IsEmpty]: Start isEmpty. Operand 7130 states and 21632 transitions. [2022-02-15 14:44:49,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-02-15 14:44:49,633 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:44:49,633 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:44:49,649 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (115)] Forceful destruction successful, exit code 0 [2022-02-15 14:44:49,835 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117,115 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:44:49,835 INFO L402 AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 14:44:49,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:44:49,836 INFO L85 PathProgramCache]: Analyzing trace with hash -923010665, now seen corresponding path program 27 times [2022-02-15 14:44:49,836 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:44:49,836 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [588611517] [2022-02-15 14:44:49,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:44:49,836 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:44:49,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:44:50,356 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:44:50,356 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:44:50,356 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [588611517] [2022-02-15 14:44:50,356 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [588611517] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:44:50,356 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1161185507] [2022-02-15 14:44:50,356 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-15 14:44:50,356 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:44:50,356 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:44:50,357 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) [2022-02-15 14:44:50,358 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (116)] Waiting until timeout for monitored process [2022-02-15 14:44:50,385 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-02-15 14:44:50,385 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:44:50,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 42 conjunts are in the unsatisfiable core [2022-02-15 14:44:50,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:44:50,579 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-02-15 14:44:50,763 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 11 treesize of output 7 [2022-02-15 14:44:51,248 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:44:51,248 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:44:52,007 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:44:52,007 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 36 [2022-02-15 14:44:52,141 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:44:52,142 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 39 [2022-02-15 14:44:52,366 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:44:52,367 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1161185507] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:44:52,367 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:44:52,367 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20, 20] total 54 [2022-02-15 14:44:52,367 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1554907651] [2022-02-15 14:44:52,367 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:44:52,367 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2022-02-15 14:44:52,367 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:44:52,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2022-02-15 14:44:52,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=225, Invalid=2745, Unknown=0, NotChecked=0, Total=2970 [2022-02-15 14:44:52,368 INFO L87 Difference]: Start difference. First operand 7130 states and 21632 transitions. Second operand has 55 states, 55 states have (on average 2.1818181818181817) internal successors, (120), 54 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:44:54,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:44:54,868 INFO L93 Difference]: Finished difference Result 15279 states and 45753 transitions. [2022-02-15 14:44:54,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-02-15 14:44:54,868 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 2.1818181818181817) internal successors, (120), 54 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2022-02-15 14:44:54,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:44:54,894 INFO L225 Difference]: With dead ends: 15279 [2022-02-15 14:44:54,894 INFO L226 Difference]: Without dead ends: 15226 [2022-02-15 14:44:54,895 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 57 SyntacticMatches, 6 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1903 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=506, Invalid=5974, Unknown=0, NotChecked=0, Total=6480 [2022-02-15 14:44:54,895 INFO L933 BasicCegarLoop]: 106 mSDtfsCounter, 327 mSDsluCounter, 3369 mSDsCounter, 0 mSdLazyCounter, 3413 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 327 SdHoareTripleChecker+Valid, 2633 SdHoareTripleChecker+Invalid, 3494 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 3413 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-02-15 14:44:54,895 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [327 Valid, 2633 Invalid, 3494 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 3413 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-02-15 14:44:54,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15226 states. [2022-02-15 14:44:55,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15226 to 7116. [2022-02-15 14:44:55,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7116 states, 7115 states have (on average 3.0359803232607168) internal successors, (21601), 7115 states have internal predecessors, (21601), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:44:55,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7116 states to 7116 states and 21601 transitions. [2022-02-15 14:44:55,049 INFO L78 Accepts]: Start accepts. Automaton has 7116 states and 21601 transitions. Word has length 48 [2022-02-15 14:44:55,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:44:55,049 INFO L470 AbstractCegarLoop]: Abstraction has 7116 states and 21601 transitions. [2022-02-15 14:44:55,049 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 2.1818181818181817) internal successors, (120), 54 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:44:55,049 INFO L276 IsEmpty]: Start isEmpty. Operand 7116 states and 21601 transitions. [2022-02-15 14:44:55,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-02-15 14:44:55,058 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:44:55,058 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:44:55,074 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (116)] Forceful destruction successful, exit code 0 [2022-02-15 14:44:55,258 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable118 [2022-02-15 14:44:55,259 INFO L402 AbstractCegarLoop]: === Iteration 120 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 14:44:55,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:44:55,259 INFO L85 PathProgramCache]: Analyzing trace with hash 1950075915, now seen corresponding path program 28 times [2022-02-15 14:44:55,259 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:44:55,259 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [421058637] [2022-02-15 14:44:55,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:44:55,259 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:44:55,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:44:55,795 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:44:55,796 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:44:55,796 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [421058637] [2022-02-15 14:44:55,796 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [421058637] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:44:55,796 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1211527764] [2022-02-15 14:44:55,796 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-15 14:44:55,796 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:44:55,796 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:44:55,797 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) [2022-02-15 14:44:55,797 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (117)] Waiting until timeout for monitored process [2022-02-15 14:44:55,823 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-15 14:44:55,823 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:44:55,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2022-02-15 14:44:55,825 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:44:56,046 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 15 treesize of output 7 [2022-02-15 14:44:56,237 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 15 treesize of output 7 [2022-02-15 14:44:56,727 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:44:56,727 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:44:57,489 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:44:57,489 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 34 treesize of output 36 [2022-02-15 14:44:57,615 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:44:57,615 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 39 [2022-02-15 14:44:57,841 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:44:57,842 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1211527764] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:44:57,842 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:44:57,842 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20, 20] total 54 [2022-02-15 14:44:57,842 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [411656105] [2022-02-15 14:44:57,842 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:44:57,842 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2022-02-15 14:44:57,842 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:44:57,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2022-02-15 14:44:57,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=225, Invalid=2745, Unknown=0, NotChecked=0, Total=2970 [2022-02-15 14:44:57,843 INFO L87 Difference]: Start difference. First operand 7116 states and 21601 transitions. Second operand has 55 states, 55 states have (on average 2.1636363636363636) internal successors, (119), 54 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) [2022-02-15 14:45:00,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:45:00,380 INFO L93 Difference]: Finished difference Result 15307 states and 45808 transitions. [2022-02-15 14:45:00,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-02-15 14:45:00,380 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 2.1636363636363636) internal successors, (119), 54 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) Word has length 48 [2022-02-15 14:45:00,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:45:00,405 INFO L225 Difference]: With dead ends: 15307 [2022-02-15 14:45:00,405 INFO L226 Difference]: Without dead ends: 15272 [2022-02-15 14:45:00,406 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 57 SyntacticMatches, 6 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1949 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=514, Invalid=6128, Unknown=0, NotChecked=0, Total=6642 [2022-02-15 14:45:00,406 INFO L933 BasicCegarLoop]: 115 mSDtfsCounter, 365 mSDsluCounter, 3192 mSDsCounter, 0 mSdLazyCounter, 3021 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 365 SdHoareTripleChecker+Valid, 2582 SdHoareTripleChecker+Invalid, 3106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 3021 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-02-15 14:45:00,406 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [365 Valid, 2582 Invalid, 3106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 3021 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-02-15 14:45:00,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15272 states. [2022-02-15 14:45:00,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15272 to 7120. [2022-02-15 14:45:00,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7120 states, 7119 states have (on average 3.035257760921478) internal successors, (21608), 7119 states have internal predecessors, (21608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:45:00,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7120 states to 7120 states and 21608 transitions. [2022-02-15 14:45:00,552 INFO L78 Accepts]: Start accepts. Automaton has 7120 states and 21608 transitions. Word has length 48 [2022-02-15 14:45:00,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:45:00,552 INFO L470 AbstractCegarLoop]: Abstraction has 7120 states and 21608 transitions. [2022-02-15 14:45:00,552 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 2.1636363636363636) internal successors, (119), 54 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) [2022-02-15 14:45:00,552 INFO L276 IsEmpty]: Start isEmpty. Operand 7120 states and 21608 transitions. [2022-02-15 14:45:00,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-02-15 14:45:00,561 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:45:00,561 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:45:00,576 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (117)] Forceful destruction successful, exit code 0 [2022-02-15 14:45:00,761 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119,117 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:45:00,761 INFO L402 AbstractCegarLoop]: === Iteration 121 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 14:45:00,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:45:00,762 INFO L85 PathProgramCache]: Analyzing trace with hash -1468708917, now seen corresponding path program 29 times [2022-02-15 14:45:00,762 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:45:00,762 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [179345718] [2022-02-15 14:45:00,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:45:00,762 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:45:00,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:45:01,286 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:45:01,286 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:45:01,286 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [179345718] [2022-02-15 14:45:01,286 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [179345718] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:45:01,286 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1662180327] [2022-02-15 14:45:01,286 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-15 14:45:01,286 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:45:01,286 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:45:01,287 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) [2022-02-15 14:45:01,287 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (118)] Waiting until timeout for monitored process [2022-02-15 14:45:01,315 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-02-15 14:45:01,316 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:45:01,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 44 conjunts are in the unsatisfiable core [2022-02-15 14:45:01,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:45:01,514 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-02-15 14:45:01,714 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 15 treesize of output 7 [2022-02-15 14:45:02,297 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:45:02,297 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:45:03,100 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:45:03,100 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 36 [2022-02-15 14:45:03,247 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:45:03,247 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 39 [2022-02-15 14:45:03,480 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:45:03,480 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1662180327] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:45:03,480 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:45:03,480 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20, 20] total 54 [2022-02-15 14:45:03,481 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1328176435] [2022-02-15 14:45:03,481 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:45:03,481 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2022-02-15 14:45:03,481 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:45:03,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2022-02-15 14:45:03,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=221, Invalid=2749, Unknown=0, NotChecked=0, Total=2970 [2022-02-15 14:45:03,481 INFO L87 Difference]: Start difference. First operand 7120 states and 21608 transitions. Second operand has 55 states, 55 states have (on average 2.1636363636363636) internal successors, (119), 54 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) [2022-02-15 14:45:06,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:45:06,391 INFO L93 Difference]: Finished difference Result 12665 states and 38226 transitions. [2022-02-15 14:45:06,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-02-15 14:45:06,391 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 2.1636363636363636) internal successors, (119), 54 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) Word has length 48 [2022-02-15 14:45:06,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:45:06,414 INFO L225 Difference]: With dead ends: 12665 [2022-02-15 14:45:06,414 INFO L226 Difference]: Without dead ends: 12613 [2022-02-15 14:45:06,415 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 54 SyntacticMatches, 9 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1985 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=546, Invalid=6096, Unknown=0, NotChecked=0, Total=6642 [2022-02-15 14:45:06,419 INFO L933 BasicCegarLoop]: 106 mSDtfsCounter, 401 mSDsluCounter, 3544 mSDsCounter, 0 mSdLazyCounter, 3596 mSolverCounterSat, 101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 401 SdHoareTripleChecker+Valid, 2835 SdHoareTripleChecker+Invalid, 3697 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 3596 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-02-15 14:45:06,419 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [401 Valid, 2835 Invalid, 3697 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 3596 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-02-15 14:45:06,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12613 states. [2022-02-15 14:45:06,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12613 to 7108. [2022-02-15 14:45:06,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7108 states, 7107 states have (on average 3.0372871816518927) internal successors, (21586), 7107 states have internal predecessors, (21586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:45:06,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7108 states to 7108 states and 21586 transitions. [2022-02-15 14:45:06,561 INFO L78 Accepts]: Start accepts. Automaton has 7108 states and 21586 transitions. Word has length 48 [2022-02-15 14:45:06,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:45:06,561 INFO L470 AbstractCegarLoop]: Abstraction has 7108 states and 21586 transitions. [2022-02-15 14:45:06,562 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 2.1636363636363636) internal successors, (119), 54 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) [2022-02-15 14:45:06,562 INFO L276 IsEmpty]: Start isEmpty. Operand 7108 states and 21586 transitions. [2022-02-15 14:45:06,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-02-15 14:45:06,570 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:45:06,570 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:45:06,586 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (118)] Forceful destruction successful, exit code 0 [2022-02-15 14:45:06,770 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,118 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:45:06,771 INFO L402 AbstractCegarLoop]: === Iteration 122 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 14:45:06,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:45:06,771 INFO L85 PathProgramCache]: Analyzing trace with hash -1340281267, now seen corresponding path program 30 times [2022-02-15 14:45:06,771 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:45:06,771 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [709429676] [2022-02-15 14:45:06,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:45:06,771 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:45:06,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:45:07,296 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:45:07,296 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:45:07,296 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [709429676] [2022-02-15 14:45:07,296 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [709429676] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:45:07,296 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [363132830] [2022-02-15 14:45:07,296 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-15 14:45:07,296 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:45:07,296 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:45:07,297 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) [2022-02-15 14:45:07,298 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (119)] Waiting until timeout for monitored process [2022-02-15 14:45:07,325 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-02-15 14:45:07,325 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:45:07,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2022-02-15 14:45:07,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:45:07,524 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 15 treesize of output 7 [2022-02-15 14:45:07,712 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 11 treesize of output 7 [2022-02-15 14:45:08,215 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:45:08,215 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:45:09,006 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:45:09,006 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 34 treesize of output 36 [2022-02-15 14:45:09,137 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:45:09,137 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 37 treesize of output 39 [2022-02-15 14:45:09,384 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:45:09,384 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [363132830] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:45:09,384 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:45:09,384 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20, 20] total 54 [2022-02-15 14:45:09,384 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [28228020] [2022-02-15 14:45:09,384 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:45:09,385 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2022-02-15 14:45:09,385 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:45:09,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2022-02-15 14:45:09,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=220, Invalid=2750, Unknown=0, NotChecked=0, Total=2970 [2022-02-15 14:45:09,385 INFO L87 Difference]: Start difference. First operand 7108 states and 21586 transitions. Second operand has 55 states, 55 states have (on average 2.1818181818181817) internal successors, (120), 54 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:45:12,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:45:12,280 INFO L93 Difference]: Finished difference Result 12700 states and 38298 transitions. [2022-02-15 14:45:12,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-02-15 14:45:12,280 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 2.1818181818181817) internal successors, (120), 54 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2022-02-15 14:45:12,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:45:12,302 INFO L225 Difference]: With dead ends: 12700 [2022-02-15 14:45:12,302 INFO L226 Difference]: Without dead ends: 12660 [2022-02-15 14:45:12,302 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 57 SyntacticMatches, 6 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1976 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=599, Invalid=6541, Unknown=0, NotChecked=0, Total=7140 [2022-02-15 14:45:12,302 INFO L933 BasicCegarLoop]: 103 mSDtfsCounter, 412 mSDsluCounter, 3376 mSDsCounter, 0 mSdLazyCounter, 3457 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 412 SdHoareTripleChecker+Valid, 2615 SdHoareTripleChecker+Invalid, 3557 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 3457 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-02-15 14:45:12,302 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [412 Valid, 2615 Invalid, 3557 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 3457 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-02-15 14:45:12,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12660 states. [2022-02-15 14:45:12,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12660 to 7114. [2022-02-15 14:45:12,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7114 states, 7113 states have (on average 3.0365527906649796) internal successors, (21599), 7113 states have internal predecessors, (21599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:45:12,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7114 states to 7114 states and 21599 transitions. [2022-02-15 14:45:12,441 INFO L78 Accepts]: Start accepts. Automaton has 7114 states and 21599 transitions. Word has length 48 [2022-02-15 14:45:12,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:45:12,441 INFO L470 AbstractCegarLoop]: Abstraction has 7114 states and 21599 transitions. [2022-02-15 14:45:12,441 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 2.1818181818181817) internal successors, (120), 54 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:45:12,441 INFO L276 IsEmpty]: Start isEmpty. Operand 7114 states and 21599 transitions. [2022-02-15 14:45:12,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-02-15 14:45:12,450 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:45:12,450 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:45:12,465 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (119)] Ended with exit code 0 [2022-02-15 14:45:12,650 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable121 [2022-02-15 14:45:12,650 INFO L402 AbstractCegarLoop]: === Iteration 123 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 14:45:12,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:45:12,650 INFO L85 PathProgramCache]: Analyzing trace with hash 1288287443, now seen corresponding path program 31 times [2022-02-15 14:45:12,650 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:45:12,651 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [226951694] [2022-02-15 14:45:12,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:45:12,651 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:45:12,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:45:13,188 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:45:13,189 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:45:13,189 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [226951694] [2022-02-15 14:45:13,189 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [226951694] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:45:13,189 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1743892914] [2022-02-15 14:45:13,189 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-15 14:45:13,189 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:45:13,189 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:45:13,190 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) [2022-02-15 14:45:13,190 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (120)] Waiting until timeout for monitored process [2022-02-15 14:45:13,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:45:13,217 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2022-02-15 14:45:13,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:45:13,412 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 15 treesize of output 7 [2022-02-15 14:45:13,603 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 15 treesize of output 7 [2022-02-15 14:45:14,241 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:45:14,241 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:45:14,987 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:45:14,987 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 36 [2022-02-15 14:45:15,111 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:45:15,112 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 39 [2022-02-15 14:45:15,343 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:45:15,343 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1743892914] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:45:15,343 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:45:15,343 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20, 20] total 54 [2022-02-15 14:45:15,343 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1771926099] [2022-02-15 14:45:15,343 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:45:15,343 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2022-02-15 14:45:15,343 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:45:15,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2022-02-15 14:45:15,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=225, Invalid=2745, Unknown=0, NotChecked=0, Total=2970 [2022-02-15 14:45:15,344 INFO L87 Difference]: Start difference. First operand 7114 states and 21599 transitions. Second operand has 55 states, 55 states have (on average 2.1818181818181817) internal successors, (120), 54 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:45:17,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:45:17,812 INFO L93 Difference]: Finished difference Result 15263 states and 45720 transitions. [2022-02-15 14:45:17,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-02-15 14:45:17,812 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 2.1818181818181817) internal successors, (120), 54 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2022-02-15 14:45:17,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:45:17,839 INFO L225 Difference]: With dead ends: 15263 [2022-02-15 14:45:17,839 INFO L226 Difference]: Without dead ends: 15175 [2022-02-15 14:45:17,840 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 52 SyntacticMatches, 11 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2058 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=506, Invalid=5974, Unknown=0, NotChecked=0, Total=6480 [2022-02-15 14:45:17,840 INFO L933 BasicCegarLoop]: 107 mSDtfsCounter, 324 mSDsluCounter, 3188 mSDsCounter, 0 mSdLazyCounter, 3206 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 324 SdHoareTripleChecker+Valid, 2470 SdHoareTripleChecker+Invalid, 3290 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 3206 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-02-15 14:45:17,840 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [324 Valid, 2470 Invalid, 3290 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 3206 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-02-15 14:45:17,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15175 states. [2022-02-15 14:45:17,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15175 to 7065. [2022-02-15 14:45:17,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7065 states, 7064 states have (on average 3.042893544733862) internal successors, (21495), 7064 states have internal predecessors, (21495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:45:18,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7065 states to 7065 states and 21495 transitions. [2022-02-15 14:45:18,008 INFO L78 Accepts]: Start accepts. Automaton has 7065 states and 21495 transitions. Word has length 48 [2022-02-15 14:45:18,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:45:18,008 INFO L470 AbstractCegarLoop]: Abstraction has 7065 states and 21495 transitions. [2022-02-15 14:45:18,008 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 2.1818181818181817) internal successors, (120), 54 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:45:18,008 INFO L276 IsEmpty]: Start isEmpty. Operand 7065 states and 21495 transitions. [2022-02-15 14:45:18,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-02-15 14:45:18,017 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:45:18,018 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:45:18,033 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (120)] Forceful destruction successful, exit code 0 [2022-02-15 14:45:18,218 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 120 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable122 [2022-02-15 14:45:18,218 INFO L402 AbstractCegarLoop]: === Iteration 124 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 14:45:18,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:45:18,218 INFO L85 PathProgramCache]: Analyzing trace with hash -651900585, now seen corresponding path program 32 times [2022-02-15 14:45:18,218 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:45:18,218 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2473634] [2022-02-15 14:45:18,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:45:18,219 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:45:18,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:45:18,749 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:45:18,750 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:45:18,750 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2473634] [2022-02-15 14:45:18,750 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2473634] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:45:18,750 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1399811558] [2022-02-15 14:45:18,750 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-15 14:45:18,750 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:45:18,750 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:45:18,751 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) [2022-02-15 14:45:18,751 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (121)] Waiting until timeout for monitored process [2022-02-15 14:45:18,777 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-15 14:45:18,777 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:45:18,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2022-02-15 14:45:18,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:45:18,966 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-02-15 14:45:19,154 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-02-15 14:45:19,693 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:45:19,694 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:45:20,416 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:45:20,417 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 36 [2022-02-15 14:45:20,537 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:45:20,538 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 39 [2022-02-15 14:45:20,762 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:45:20,762 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1399811558] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:45:20,762 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:45:20,762 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20, 20] total 53 [2022-02-15 14:45:20,763 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [240085381] [2022-02-15 14:45:20,763 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:45:20,763 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2022-02-15 14:45:20,763 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:45:20,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2022-02-15 14:45:20,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=241, Invalid=2621, Unknown=0, NotChecked=0, Total=2862 [2022-02-15 14:45:20,763 INFO L87 Difference]: Start difference. First operand 7065 states and 21495 transitions. Second operand has 54 states, 54 states have (on average 2.1666666666666665) internal successors, (117), 53 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:45:23,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:45:23,935 INFO L93 Difference]: Finished difference Result 16603 states and 49685 transitions. [2022-02-15 14:45:23,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-02-15 14:45:23,935 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 2.1666666666666665) internal successors, (117), 53 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2022-02-15 14:45:23,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:45:23,964 INFO L225 Difference]: With dead ends: 16603 [2022-02-15 14:45:23,964 INFO L226 Difference]: Without dead ends: 16446 [2022-02-15 14:45:23,965 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 55 SyntacticMatches, 9 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2414 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=648, Invalid=7184, Unknown=0, NotChecked=0, Total=7832 [2022-02-15 14:45:23,965 INFO L933 BasicCegarLoop]: 119 mSDtfsCounter, 471 mSDsluCounter, 3436 mSDsCounter, 0 mSdLazyCounter, 3671 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 471 SdHoareTripleChecker+Valid, 2556 SdHoareTripleChecker+Invalid, 3766 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 3671 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-02-15 14:45:23,965 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [471 Valid, 2556 Invalid, 3766 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 3671 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-02-15 14:45:23,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16446 states. [2022-02-15 14:45:24,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16446 to 7131. [2022-02-15 14:45:24,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7131 states, 7130 states have (on average 3.038849929873773) internal successors, (21667), 7130 states have internal predecessors, (21667), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:45:24,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7131 states to 7131 states and 21667 transitions. [2022-02-15 14:45:24,130 INFO L78 Accepts]: Start accepts. Automaton has 7131 states and 21667 transitions. Word has length 48 [2022-02-15 14:45:24,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:45:24,130 INFO L470 AbstractCegarLoop]: Abstraction has 7131 states and 21667 transitions. [2022-02-15 14:45:24,130 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 2.1666666666666665) internal successors, (117), 53 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:45:24,130 INFO L276 IsEmpty]: Start isEmpty. Operand 7131 states and 21667 transitions. [2022-02-15 14:45:24,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-02-15 14:45:24,138 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:45:24,139 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:45:24,156 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (121)] Forceful destruction successful, exit code 0 [2022-02-15 14:45:24,339 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 121 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable123 [2022-02-15 14:45:24,339 INFO L402 AbstractCegarLoop]: === Iteration 125 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 14:45:24,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:45:24,339 INFO L85 PathProgramCache]: Analyzing trace with hash -1420632681, now seen corresponding path program 33 times [2022-02-15 14:45:24,339 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:45:24,339 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [471607384] [2022-02-15 14:45:24,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:45:24,340 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:45:24,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:45:24,848 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:45:24,848 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:45:24,848 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [471607384] [2022-02-15 14:45:24,848 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [471607384] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:45:24,848 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [657355411] [2022-02-15 14:45:24,848 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-15 14:45:24,848 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:45:24,848 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:45:24,849 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) [2022-02-15 14:45:24,850 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (122)] Waiting until timeout for monitored process [2022-02-15 14:45:24,876 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-15 14:45:24,876 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:45:24,877 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2022-02-15 14:45:24,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:45:25,070 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-02-15 14:45:25,249 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-02-15 14:45:25,827 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:45:25,827 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:45:26,686 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:45:26,687 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 39 [2022-02-15 14:45:26,826 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:45:26,826 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 44 [2022-02-15 14:45:27,056 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:45:27,056 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [657355411] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:45:27,057 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:45:27,057 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 23, 23] total 59 [2022-02-15 14:45:27,057 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [703462144] [2022-02-15 14:45:27,057 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:45:27,057 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2022-02-15 14:45:27,057 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:45:27,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2022-02-15 14:45:27,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=299, Invalid=3241, Unknown=0, NotChecked=0, Total=3540 [2022-02-15 14:45:27,058 INFO L87 Difference]: Start difference. First operand 7131 states and 21667 transitions. Second operand has 60 states, 60 states have (on average 2.1) internal successors, (126), 59 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:45:30,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:45:30,908 INFO L93 Difference]: Finished difference Result 18578 states and 55764 transitions. [2022-02-15 14:45:30,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-02-15 14:45:30,909 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 2.1) internal successors, (126), 59 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2022-02-15 14:45:30,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:45:30,943 INFO L225 Difference]: With dead ends: 18578 [2022-02-15 14:45:30,943 INFO L226 Difference]: Without dead ends: 18543 [2022-02-15 14:45:30,944 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 53 SyntacticMatches, 5 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3089 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=895, Invalid=9407, Unknown=0, NotChecked=0, Total=10302 [2022-02-15 14:45:30,944 INFO L933 BasicCegarLoop]: 122 mSDtfsCounter, 567 mSDsluCounter, 3860 mSDsCounter, 0 mSdLazyCounter, 4507 mSolverCounterSat, 165 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 567 SdHoareTripleChecker+Valid, 2909 SdHoareTripleChecker+Invalid, 4672 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 165 IncrementalHoareTripleChecker+Valid, 4507 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-02-15 14:45:30,944 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [567 Valid, 2909 Invalid, 4672 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [165 Valid, 4507 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-02-15 14:45:30,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18543 states. [2022-02-15 14:45:31,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18543 to 7188. [2022-02-15 14:45:31,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7188 states, 7187 states have (on average 3.0333936273827744) internal successors, (21801), 7187 states have internal predecessors, (21801), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:45:31,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7188 states to 7188 states and 21801 transitions. [2022-02-15 14:45:31,143 INFO L78 Accepts]: Start accepts. Automaton has 7188 states and 21801 transitions. Word has length 48 [2022-02-15 14:45:31,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:45:31,143 INFO L470 AbstractCegarLoop]: Abstraction has 7188 states and 21801 transitions. [2022-02-15 14:45:31,143 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 60 states have (on average 2.1) internal successors, (126), 59 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:45:31,143 INFO L276 IsEmpty]: Start isEmpty. Operand 7188 states and 21801 transitions. [2022-02-15 14:45:31,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-02-15 14:45:31,152 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:45:31,152 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:45:31,168 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (122)] Ended with exit code 0 [2022-02-15 14:45:31,353 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable124 [2022-02-15 14:45:31,353 INFO L402 AbstractCegarLoop]: === Iteration 126 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 14:45:31,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:45:31,353 INFO L85 PathProgramCache]: Analyzing trace with hash -544450217, now seen corresponding path program 34 times [2022-02-15 14:45:31,353 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:45:31,353 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1854629259] [2022-02-15 14:45:31,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:45:31,353 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:45:31,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:45:31,887 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:45:31,888 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:45:31,888 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1854629259] [2022-02-15 14:45:31,888 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1854629259] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:45:31,888 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1042172355] [2022-02-15 14:45:31,888 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-15 14:45:31,888 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:45:31,888 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:45:31,889 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) [2022-02-15 14:45:31,889 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (123)] Waiting until timeout for monitored process [2022-02-15 14:45:31,915 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-15 14:45:31,915 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:45:31,916 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2022-02-15 14:45:31,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:45:32,106 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 15 treesize of output 7 [2022-02-15 14:45:32,291 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-02-15 14:45:32,781 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:45:32,781 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:45:33,520 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:45:33,521 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 36 [2022-02-15 14:45:33,645 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:45:33,645 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 37 treesize of output 39 [2022-02-15 14:45:33,935 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:45:33,935 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1042172355] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:45:33,935 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:45:33,935 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20, 20] total 53 [2022-02-15 14:45:33,935 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164259978] [2022-02-15 14:45:33,935 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:45:33,935 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2022-02-15 14:45:33,935 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:45:33,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2022-02-15 14:45:33,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=2629, Unknown=0, NotChecked=0, Total=2862 [2022-02-15 14:45:33,936 INFO L87 Difference]: Start difference. First operand 7188 states and 21801 transitions. Second operand has 54 states, 54 states have (on average 2.1666666666666665) internal successors, (117), 53 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:45:37,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:45:37,238 INFO L93 Difference]: Finished difference Result 13336 states and 40246 transitions. [2022-02-15 14:45:37,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-02-15 14:45:37,238 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 2.1666666666666665) internal successors, (117), 53 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2022-02-15 14:45:37,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:45:37,263 INFO L225 Difference]: With dead ends: 13336 [2022-02-15 14:45:37,263 INFO L226 Difference]: Without dead ends: 13292 [2022-02-15 14:45:37,263 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 57 SyntacticMatches, 7 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2130 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=650, Invalid=6660, Unknown=0, NotChecked=0, Total=7310 [2022-02-15 14:45:37,264 INFO L933 BasicCegarLoop]: 101 mSDtfsCounter, 389 mSDsluCounter, 3292 mSDsCounter, 0 mSdLazyCounter, 3629 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 389 SdHoareTripleChecker+Valid, 2535 SdHoareTripleChecker+Invalid, 3801 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 3629 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 70 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-02-15 14:45:37,264 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [389 Valid, 2535 Invalid, 3801 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 3629 Invalid, 0 Unknown, 70 Unchecked, 1.3s Time] [2022-02-15 14:45:37,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13292 states. [2022-02-15 14:45:37,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13292 to 7184. [2022-02-15 14:45:37,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7184 states, 7183 states have (on average 3.03355144090213) internal successors, (21790), 7183 states have internal predecessors, (21790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:45:37,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7184 states to 7184 states and 21790 transitions. [2022-02-15 14:45:37,442 INFO L78 Accepts]: Start accepts. Automaton has 7184 states and 21790 transitions. Word has length 48 [2022-02-15 14:45:37,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:45:37,442 INFO L470 AbstractCegarLoop]: Abstraction has 7184 states and 21790 transitions. [2022-02-15 14:45:37,443 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 2.1666666666666665) internal successors, (117), 53 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:45:37,443 INFO L276 IsEmpty]: Start isEmpty. Operand 7184 states and 21790 transitions. [2022-02-15 14:45:37,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-02-15 14:45:37,453 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:45:37,453 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:45:37,468 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (123)] Ended with exit code 0 [2022-02-15 14:45:37,654 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125,123 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:45:37,654 INFO L402 AbstractCegarLoop]: === Iteration 127 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 14:45:37,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:45:37,654 INFO L85 PathProgramCache]: Analyzing trace with hash -1278917541, now seen corresponding path program 35 times [2022-02-15 14:45:37,654 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:45:37,655 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1105496780] [2022-02-15 14:45:37,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:45:37,655 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:45:37,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:45:38,168 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:45:38,169 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:45:38,169 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1105496780] [2022-02-15 14:45:38,169 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1105496780] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:45:38,169 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1165317607] [2022-02-15 14:45:38,169 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-15 14:45:38,169 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:45:38,169 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:45:38,170 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) [2022-02-15 14:45:38,170 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (124)] Waiting until timeout for monitored process [2022-02-15 14:45:38,197 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-15 14:45:38,197 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:45:38,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 42 conjunts are in the unsatisfiable core [2022-02-15 14:45:38,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:45:38,389 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-02-15 14:45:38,576 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 11 treesize of output 7 [2022-02-15 14:45:39,056 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:45:39,056 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:45:39,828 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:45:39,828 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 34 treesize of output 36 [2022-02-15 14:45:39,946 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:45:39,946 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 39 [2022-02-15 14:45:40,176 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:45:40,177 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1165317607] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:45:40,177 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:45:40,177 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20, 20] total 54 [2022-02-15 14:45:40,177 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [557513749] [2022-02-15 14:45:40,177 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:45:40,177 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2022-02-15 14:45:40,177 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:45:40,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2022-02-15 14:45:40,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=242, Invalid=2728, Unknown=0, NotChecked=0, Total=2970 [2022-02-15 14:45:40,178 INFO L87 Difference]: Start difference. First operand 7184 states and 21790 transitions. Second operand has 55 states, 55 states have (on average 2.1636363636363636) internal successors, (119), 54 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) [2022-02-15 14:45:44,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:45:44,316 INFO L93 Difference]: Finished difference Result 16547 states and 49418 transitions. [2022-02-15 14:45:44,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-02-15 14:45:44,316 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 2.1636363636363636) internal successors, (119), 54 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) Word has length 48 [2022-02-15 14:45:44,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:45:44,345 INFO L225 Difference]: With dead ends: 16547 [2022-02-15 14:45:44,345 INFO L226 Difference]: Without dead ends: 16442 [2022-02-15 14:45:44,346 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 59 SyntacticMatches, 15 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3037 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=731, Invalid=8389, Unknown=0, NotChecked=0, Total=9120 [2022-02-15 14:45:44,346 INFO L933 BasicCegarLoop]: 119 mSDtfsCounter, 502 mSDsluCounter, 4447 mSDsCounter, 0 mSdLazyCounter, 4631 mSolverCounterSat, 112 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 502 SdHoareTripleChecker+Valid, 3369 SdHoareTripleChecker+Invalid, 5152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 112 IncrementalHoareTripleChecker+Valid, 4631 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 409 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-02-15 14:45:44,346 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [502 Valid, 3369 Invalid, 5152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [112 Valid, 4631 Invalid, 0 Unknown, 409 Unchecked, 1.7s Time] [2022-02-15 14:45:44,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16442 states. [2022-02-15 14:45:44,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16442 to 7190. [2022-02-15 14:45:44,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7190 states, 7189 states have (on average 3.032827931562109) internal successors, (21803), 7189 states have internal predecessors, (21803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:45:44,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7190 states to 7190 states and 21803 transitions. [2022-02-15 14:45:44,511 INFO L78 Accepts]: Start accepts. Automaton has 7190 states and 21803 transitions. Word has length 48 [2022-02-15 14:45:44,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:45:44,511 INFO L470 AbstractCegarLoop]: Abstraction has 7190 states and 21803 transitions. [2022-02-15 14:45:44,511 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 2.1636363636363636) internal successors, (119), 54 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) [2022-02-15 14:45:44,511 INFO L276 IsEmpty]: Start isEmpty. Operand 7190 states and 21803 transitions. [2022-02-15 14:45:44,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-02-15 14:45:44,520 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:45:44,520 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:45:44,535 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (124)] Forceful destruction successful, exit code 0 [2022-02-15 14:45:44,735 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126,124 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:45:44,735 INFO L402 AbstractCegarLoop]: === Iteration 128 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 14:45:44,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:45:44,737 INFO L85 PathProgramCache]: Analyzing trace with hash 1732902295, now seen corresponding path program 36 times [2022-02-15 14:45:44,737 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:45:44,737 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [694685267] [2022-02-15 14:45:44,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:45:44,737 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:45:44,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:45:45,262 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:45:45,262 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:45:45,263 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [694685267] [2022-02-15 14:45:45,263 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [694685267] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:45:45,263 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1924486877] [2022-02-15 14:45:45,263 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-15 14:45:45,263 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:45:45,263 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:45:45,264 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) [2022-02-15 14:45:45,264 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (125)] Waiting until timeout for monitored process [2022-02-15 14:45:45,290 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-15 14:45:45,291 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:45:45,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 42 conjunts are in the unsatisfiable core [2022-02-15 14:45:45,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:45:45,477 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-02-15 14:45:45,671 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-02-15 14:45:46,136 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:45:46,136 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:45:46,874 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:45:46,874 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 34 treesize of output 36 [2022-02-15 14:45:47,003 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:45:47,004 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 39 [2022-02-15 14:45:47,237 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:45:47,238 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1924486877] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:45:47,238 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:45:47,238 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20, 20] total 54 [2022-02-15 14:45:47,238 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918939605] [2022-02-15 14:45:47,238 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:45:47,238 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2022-02-15 14:45:47,238 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:45:47,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2022-02-15 14:45:47,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=242, Invalid=2728, Unknown=0, NotChecked=0, Total=2970 [2022-02-15 14:45:47,239 INFO L87 Difference]: Start difference. First operand 7190 states and 21803 transitions. Second operand has 55 states, 55 states have (on average 2.1636363636363636) internal successors, (119), 54 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) [2022-02-15 14:45:50,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:45:50,898 INFO L93 Difference]: Finished difference Result 16581 states and 49591 transitions. [2022-02-15 14:45:50,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-02-15 14:45:50,898 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 2.1636363636363636) internal successors, (119), 54 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) Word has length 48 [2022-02-15 14:45:50,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:45:50,929 INFO L225 Difference]: With dead ends: 16581 [2022-02-15 14:45:50,929 INFO L226 Difference]: Without dead ends: 16483 [2022-02-15 14:45:50,929 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 57 SyntacticMatches, 6 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2420 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=676, Invalid=7514, Unknown=0, NotChecked=0, Total=8190 [2022-02-15 14:45:50,930 INFO L933 BasicCegarLoop]: 115 mSDtfsCounter, 395 mSDsluCounter, 4130 mSDsCounter, 0 mSdLazyCounter, 4350 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 395 SdHoareTripleChecker+Valid, 3073 SdHoareTripleChecker+Invalid, 4446 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 4350 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-02-15 14:45:50,930 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [395 Valid, 3073 Invalid, 4446 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 4350 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-02-15 14:45:50,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16483 states. [2022-02-15 14:45:51,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16483 to 7170. [2022-02-15 14:45:51,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7170 states, 7169 states have (on average 3.0352908355419164) internal successors, (21760), 7169 states have internal predecessors, (21760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:45:51,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7170 states to 7170 states and 21760 transitions. [2022-02-15 14:45:51,105 INFO L78 Accepts]: Start accepts. Automaton has 7170 states and 21760 transitions. Word has length 48 [2022-02-15 14:45:51,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:45:51,105 INFO L470 AbstractCegarLoop]: Abstraction has 7170 states and 21760 transitions. [2022-02-15 14:45:51,105 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 2.1636363636363636) internal successors, (119), 54 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) [2022-02-15 14:45:51,105 INFO L276 IsEmpty]: Start isEmpty. Operand 7170 states and 21760 transitions. [2022-02-15 14:45:51,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-02-15 14:45:51,133 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:45:51,133 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:45:51,149 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (125)] Ended with exit code 0 [2022-02-15 14:45:51,335 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 125 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable127 [2022-02-15 14:45:51,335 INFO L402 AbstractCegarLoop]: === Iteration 129 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 14:45:51,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:45:51,336 INFO L85 PathProgramCache]: Analyzing trace with hash -837756267, now seen corresponding path program 37 times [2022-02-15 14:45:51,336 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:45:51,336 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2135798658] [2022-02-15 14:45:51,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:45:51,336 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:45:51,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:45:51,840 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:45:51,841 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:45:51,841 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2135798658] [2022-02-15 14:45:51,841 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2135798658] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:45:51,841 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1038697696] [2022-02-15 14:45:51,841 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-15 14:45:51,841 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:45:51,841 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:45:51,842 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) [2022-02-15 14:45:51,843 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (126)] Waiting until timeout for monitored process [2022-02-15 14:45:51,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:45:51,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2022-02-15 14:45:51,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:45:52,057 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-02-15 14:45:52,251 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-02-15 14:45:52,766 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:45:52,766 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:45:53,489 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:45:53,489 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 34 treesize of output 36 [2022-02-15 14:45:53,624 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:45:53,624 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 37 treesize of output 39 [2022-02-15 14:45:53,849 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:45:53,850 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1038697696] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:45:53,850 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:45:53,850 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20, 20] total 53 [2022-02-15 14:45:53,850 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1739291645] [2022-02-15 14:45:53,850 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:45:53,850 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2022-02-15 14:45:53,850 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:45:53,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2022-02-15 14:45:53,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=241, Invalid=2621, Unknown=0, NotChecked=0, Total=2862 [2022-02-15 14:45:53,851 INFO L87 Difference]: Start difference. First operand 7170 states and 21760 transitions. Second operand has 54 states, 54 states have (on average 2.1666666666666665) internal successors, (117), 53 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:45:57,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:45:57,718 INFO L93 Difference]: Finished difference Result 13362 states and 39826 transitions. [2022-02-15 14:45:57,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-02-15 14:45:57,718 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 2.1666666666666665) internal successors, (117), 53 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2022-02-15 14:45:57,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:45:57,771 INFO L225 Difference]: With dead ends: 13362 [2022-02-15 14:45:57,771 INFO L226 Difference]: Without dead ends: 13141 [2022-02-15 14:45:57,772 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 57 SyntacticMatches, 11 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2974 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=753, Invalid=8559, Unknown=0, NotChecked=0, Total=9312 [2022-02-15 14:45:57,772 INFO L933 BasicCegarLoop]: 119 mSDtfsCounter, 489 mSDsluCounter, 4071 mSDsCounter, 0 mSdLazyCounter, 4263 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 489 SdHoareTripleChecker+Valid, 2928 SdHoareTripleChecker+Invalid, 4691 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 4263 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 342 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-02-15 14:45:57,772 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [489 Valid, 2928 Invalid, 4691 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 4263 Invalid, 0 Unknown, 342 Unchecked, 1.6s Time] [2022-02-15 14:45:57,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13141 states. [2022-02-15 14:45:57,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13141 to 7230. [2022-02-15 14:45:57,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7230 states, 7229 states have (on average 3.028911329367824) internal successors, (21896), 7229 states have internal predecessors, (21896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:45:57,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7230 states to 7230 states and 21896 transitions. [2022-02-15 14:45:57,890 INFO L78 Accepts]: Start accepts. Automaton has 7230 states and 21896 transitions. Word has length 48 [2022-02-15 14:45:57,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:45:57,890 INFO L470 AbstractCegarLoop]: Abstraction has 7230 states and 21896 transitions. [2022-02-15 14:45:57,890 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 2.1666666666666665) internal successors, (117), 53 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:45:57,890 INFO L276 IsEmpty]: Start isEmpty. Operand 7230 states and 21896 transitions. [2022-02-15 14:45:57,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-02-15 14:45:57,899 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:45:57,899 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:45:57,915 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (126)] Forceful destruction successful, exit code 0 [2022-02-15 14:45:58,111 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable128 [2022-02-15 14:45:58,112 INFO L402 AbstractCegarLoop]: === Iteration 130 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 14:45:58,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:45:58,112 INFO L85 PathProgramCache]: Analyzing trace with hash -873389315, now seen corresponding path program 38 times [2022-02-15 14:45:58,112 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:45:58,112 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1235625845] [2022-02-15 14:45:58,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:45:58,113 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:45:58,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:45:58,645 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:45:58,645 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:45:58,645 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1235625845] [2022-02-15 14:45:58,645 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1235625845] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:45:58,645 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [611809397] [2022-02-15 14:45:58,646 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-15 14:45:58,646 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:45:58,646 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:45:58,647 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) [2022-02-15 14:45:58,647 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (127)] Waiting until timeout for monitored process [2022-02-15 14:45:58,675 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-15 14:45:58,675 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:45:58,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2022-02-15 14:45:58,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:45:58,865 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 15 treesize of output 7 [2022-02-15 14:45:59,056 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-02-15 14:45:59,615 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:45:59,615 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:46:00,380 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:46:00,380 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 36 [2022-02-15 14:46:00,508 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:46:00,509 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 39 [2022-02-15 14:46:00,721 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:46:00,721 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [611809397] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:46:00,722 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:46:00,722 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20, 20] total 53 [2022-02-15 14:46:00,722 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [655839640] [2022-02-15 14:46:00,722 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:46:00,722 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2022-02-15 14:46:00,722 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:46:00,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2022-02-15 14:46:00,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=2629, Unknown=0, NotChecked=0, Total=2862 [2022-02-15 14:46:00,722 INFO L87 Difference]: Start difference. First operand 7230 states and 21896 transitions. Second operand has 54 states, 54 states have (on average 2.1666666666666665) internal successors, (117), 53 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:46:04,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:46:04,073 INFO L93 Difference]: Finished difference Result 13495 states and 40602 transitions. [2022-02-15 14:46:04,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-02-15 14:46:04,073 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 2.1666666666666665) internal successors, (117), 53 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2022-02-15 14:46:04,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:46:04,095 INFO L225 Difference]: With dead ends: 13495 [2022-02-15 14:46:04,095 INFO L226 Difference]: Without dead ends: 13455 [2022-02-15 14:46:04,096 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 56 SyntacticMatches, 9 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2245 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=657, Invalid=6825, Unknown=0, NotChecked=0, Total=7482 [2022-02-15 14:46:04,096 INFO L933 BasicCegarLoop]: 100 mSDtfsCounter, 428 mSDsluCounter, 3166 mSDsCounter, 0 mSdLazyCounter, 3514 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 428 SdHoareTripleChecker+Valid, 2354 SdHoareTripleChecker+Invalid, 3804 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 3514 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 192 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-02-15 14:46:04,096 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [428 Valid, 2354 Invalid, 3804 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 3514 Invalid, 0 Unknown, 192 Unchecked, 1.3s Time] [2022-02-15 14:46:04,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13455 states. [2022-02-15 14:46:04,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13455 to 7308. [2022-02-15 14:46:04,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7308 states, 7307 states have (on average 3.0213493909949363) internal successors, (22077), 7307 states have internal predecessors, (22077), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:46:04,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7308 states to 7308 states and 22077 transitions. [2022-02-15 14:46:04,228 INFO L78 Accepts]: Start accepts. Automaton has 7308 states and 22077 transitions. Word has length 48 [2022-02-15 14:46:04,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:46:04,228 INFO L470 AbstractCegarLoop]: Abstraction has 7308 states and 22077 transitions. [2022-02-15 14:46:04,228 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 2.1666666666666665) internal successors, (117), 53 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:46:04,228 INFO L276 IsEmpty]: Start isEmpty. Operand 7308 states and 22077 transitions. [2022-02-15 14:46:04,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-02-15 14:46:04,237 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:46:04,237 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:46:04,252 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (127)] Forceful destruction successful, exit code 0 [2022-02-15 14:46:04,438 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 127 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable129 [2022-02-15 14:46:04,438 INFO L402 AbstractCegarLoop]: === Iteration 131 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 14:46:04,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:46:04,438 INFO L85 PathProgramCache]: Analyzing trace with hash -1102148159, now seen corresponding path program 39 times [2022-02-15 14:46:04,438 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:46:04,438 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1551617576] [2022-02-15 14:46:04,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:46:04,438 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:46:04,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:46:04,942 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:46:04,942 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:46:04,942 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1551617576] [2022-02-15 14:46:04,942 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1551617576] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:46:04,942 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1325337101] [2022-02-15 14:46:04,942 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-15 14:46:04,942 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:46:04,942 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:46:04,943 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) [2022-02-15 14:46:04,944 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (128)] Waiting until timeout for monitored process [2022-02-15 14:46:04,970 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-15 14:46:04,970 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:46:04,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 48 conjunts are in the unsatisfiable core [2022-02-15 14:46:04,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:46:05,165 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-02-15 14:46:05,356 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 15 treesize of output 7 [2022-02-15 14:46:05,962 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:46:05,963 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:46:06,682 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:46:06,682 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 34 treesize of output 36 [2022-02-15 14:46:06,803 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:46:06,803 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 37 treesize of output 39 [2022-02-15 14:46:07,028 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:46:07,028 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1325337101] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:46:07,028 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:46:07,028 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20, 20] total 53 [2022-02-15 14:46:07,028 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [654516975] [2022-02-15 14:46:07,028 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:46:07,028 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2022-02-15 14:46:07,028 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:46:07,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2022-02-15 14:46:07,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=2626, Unknown=0, NotChecked=0, Total=2862 [2022-02-15 14:46:07,029 INFO L87 Difference]: Start difference. First operand 7308 states and 22077 transitions. Second operand has 54 states, 54 states have (on average 2.1666666666666665) internal successors, (117), 53 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:46:10,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:46:10,377 INFO L93 Difference]: Finished difference Result 16692 states and 49894 transitions. [2022-02-15 14:46:10,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-02-15 14:46:10,377 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 2.1666666666666665) internal successors, (117), 53 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2022-02-15 14:46:10,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:46:10,408 INFO L225 Difference]: With dead ends: 16692 [2022-02-15 14:46:10,408 INFO L226 Difference]: Without dead ends: 16647 [2022-02-15 14:46:10,408 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 52 SyntacticMatches, 12 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2398 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=651, Invalid=7005, Unknown=0, NotChecked=0, Total=7656 [2022-02-15 14:46:10,408 INFO L933 BasicCegarLoop]: 101 mSDtfsCounter, 342 mSDsluCounter, 3758 mSDsCounter, 0 mSdLazyCounter, 4341 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 342 SdHoareTripleChecker+Valid, 2707 SdHoareTripleChecker+Invalid, 4440 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 4341 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-02-15 14:46:10,408 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [342 Valid, 2707 Invalid, 4440 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 4341 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-02-15 14:46:10,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16647 states. [2022-02-15 14:46:10,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16647 to 7302. [2022-02-15 14:46:10,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7302 states, 7301 states have (on average 3.021229968497466) internal successors, (22058), 7301 states have internal predecessors, (22058), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:46:10,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7302 states to 7302 states and 22058 transitions. [2022-02-15 14:46:10,578 INFO L78 Accepts]: Start accepts. Automaton has 7302 states and 22058 transitions. Word has length 48 [2022-02-15 14:46:10,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:46:10,578 INFO L470 AbstractCegarLoop]: Abstraction has 7302 states and 22058 transitions. [2022-02-15 14:46:10,578 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 2.1666666666666665) internal successors, (117), 53 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:46:10,579 INFO L276 IsEmpty]: Start isEmpty. Operand 7302 states and 22058 transitions. [2022-02-15 14:46:10,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-02-15 14:46:10,587 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:46:10,587 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:46:10,603 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (128)] Forceful destruction successful, exit code 0 [2022-02-15 14:46:10,788 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,128 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:46:10,788 INFO L402 AbstractCegarLoop]: === Iteration 132 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 14:46:10,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:46:10,788 INFO L85 PathProgramCache]: Analyzing trace with hash -2048879959, now seen corresponding path program 40 times [2022-02-15 14:46:10,788 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:46:10,788 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [383771510] [2022-02-15 14:46:10,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:46:10,789 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:46:10,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:46:11,348 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:46:11,348 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:46:11,348 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [383771510] [2022-02-15 14:46:11,348 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [383771510] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:46:11,348 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1750350568] [2022-02-15 14:46:11,348 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-15 14:46:11,348 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:46:11,349 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:46:11,349 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) [2022-02-15 14:46:11,350 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (129)] Waiting until timeout for monitored process [2022-02-15 14:46:11,376 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-15 14:46:11,376 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:46:11,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2022-02-15 14:46:11,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:46:11,570 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-02-15 14:46:11,779 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-02-15 14:46:12,276 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:46:12,276 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:46:13,039 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:46:13,039 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 36 [2022-02-15 14:46:13,172 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:46:13,172 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 37 treesize of output 39 [2022-02-15 14:46:13,395 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:46:13,395 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1750350568] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:46:13,395 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:46:13,396 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20, 20] total 54 [2022-02-15 14:46:13,396 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [694997264] [2022-02-15 14:46:13,396 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:46:13,396 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2022-02-15 14:46:13,396 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:46:13,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2022-02-15 14:46:13,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=242, Invalid=2728, Unknown=0, NotChecked=0, Total=2970 [2022-02-15 14:46:13,396 INFO L87 Difference]: Start difference. First operand 7302 states and 22058 transitions. Second operand has 55 states, 55 states have (on average 2.1454545454545455) internal successors, (118), 54 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:46:16,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:46:16,627 INFO L93 Difference]: Finished difference Result 15766 states and 46905 transitions. [2022-02-15 14:46:16,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-02-15 14:46:16,628 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 2.1454545454545455) internal successors, (118), 54 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2022-02-15 14:46:16,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:46:16,655 INFO L225 Difference]: With dead ends: 15766 [2022-02-15 14:46:16,656 INFO L226 Difference]: Without dead ends: 15702 [2022-02-15 14:46:16,656 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 58 SyntacticMatches, 6 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2187 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=605, Invalid=6705, Unknown=0, NotChecked=0, Total=7310 [2022-02-15 14:46:16,656 INFO L933 BasicCegarLoop]: 125 mSDtfsCounter, 431 mSDsluCounter, 3985 mSDsCounter, 0 mSdLazyCounter, 4141 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 431 SdHoareTripleChecker+Valid, 3018 SdHoareTripleChecker+Invalid, 4448 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 4141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 222 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-02-15 14:46:16,656 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [431 Valid, 3018 Invalid, 4448 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 4141 Invalid, 0 Unknown, 222 Unchecked, 1.5s Time] [2022-02-15 14:46:16,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15702 states. [2022-02-15 14:46:16,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15702 to 7334. [2022-02-15 14:46:16,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7334 states, 7333 states have (on average 3.0178644483840174) internal successors, (22130), 7333 states have internal predecessors, (22130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:46:16,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7334 states to 7334 states and 22130 transitions. [2022-02-15 14:46:16,818 INFO L78 Accepts]: Start accepts. Automaton has 7334 states and 22130 transitions. Word has length 48 [2022-02-15 14:46:16,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:46:16,818 INFO L470 AbstractCegarLoop]: Abstraction has 7334 states and 22130 transitions. [2022-02-15 14:46:16,819 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 2.1454545454545455) internal successors, (118), 54 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:46:16,819 INFO L276 IsEmpty]: Start isEmpty. Operand 7334 states and 22130 transitions. [2022-02-15 14:46:16,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-02-15 14:46:16,827 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:46:16,827 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:46:16,842 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (129)] Forceful destruction successful, exit code 0 [2022-02-15 14:46:17,035 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131,129 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:46:17,036 INFO L402 AbstractCegarLoop]: === Iteration 133 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 14:46:17,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:46:17,036 INFO L85 PathProgramCache]: Analyzing trace with hash -1901105241, now seen corresponding path program 41 times [2022-02-15 14:46:17,036 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:46:17,036 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [652482475] [2022-02-15 14:46:17,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:46:17,036 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:46:17,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:46:17,574 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:46:17,574 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:46:17,574 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [652482475] [2022-02-15 14:46:17,574 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [652482475] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:46:17,574 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1220180763] [2022-02-15 14:46:17,575 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-15 14:46:17,575 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:46:17,575 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:46:17,576 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) [2022-02-15 14:46:17,576 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (130)] Waiting until timeout for monitored process [2022-02-15 14:46:17,603 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-15 14:46:17,603 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:46:17,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 44 conjunts are in the unsatisfiable core [2022-02-15 14:46:17,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:46:17,791 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-02-15 14:46:17,970 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-02-15 14:46:18,499 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:46:18,499 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:46:19,371 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:46:19,372 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 39 [2022-02-15 14:46:19,577 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:46:19,577 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 63 [2022-02-15 14:46:19,880 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:46:19,880 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1220180763] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:46:19,880 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:46:19,880 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 22, 22] total 58 [2022-02-15 14:46:19,880 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2042265119] [2022-02-15 14:46:19,880 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:46:19,880 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2022-02-15 14:46:19,880 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:46:19,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2022-02-15 14:46:19,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=297, Invalid=3125, Unknown=0, NotChecked=0, Total=3422 [2022-02-15 14:46:19,881 INFO L87 Difference]: Start difference. First operand 7334 states and 22130 transitions. Second operand has 59 states, 59 states have (on average 2.152542372881356) internal successors, (127), 58 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:46:23,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:46:23,905 INFO L93 Difference]: Finished difference Result 19273 states and 57399 transitions. [2022-02-15 14:46:23,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-02-15 14:46:23,905 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 2.152542372881356) internal successors, (127), 58 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2022-02-15 14:46:23,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:46:23,939 INFO L225 Difference]: With dead ends: 19273 [2022-02-15 14:46:23,939 INFO L226 Difference]: Without dead ends: 19191 [2022-02-15 14:46:23,940 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 53 SyntacticMatches, 8 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3257 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=934, Invalid=9572, Unknown=0, NotChecked=0, Total=10506 [2022-02-15 14:46:23,940 INFO L933 BasicCegarLoop]: 133 mSDtfsCounter, 547 mSDsluCounter, 4181 mSDsCounter, 0 mSdLazyCounter, 4411 mSolverCounterSat, 159 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 547 SdHoareTripleChecker+Valid, 3119 SdHoareTripleChecker+Invalid, 4833 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 159 IncrementalHoareTripleChecker+Valid, 4411 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 263 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-02-15 14:46:23,940 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [547 Valid, 3119 Invalid, 4833 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [159 Valid, 4411 Invalid, 0 Unknown, 263 Unchecked, 1.7s Time] [2022-02-15 14:46:23,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19191 states. [2022-02-15 14:46:24,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19191 to 7316. [2022-02-15 14:46:24,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7316 states, 7315 states have (on average 3.019412166780588) internal successors, (22087), 7315 states have internal predecessors, (22087), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:46:24,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7316 states to 7316 states and 22087 transitions. [2022-02-15 14:46:24,114 INFO L78 Accepts]: Start accepts. Automaton has 7316 states and 22087 transitions. Word has length 48 [2022-02-15 14:46:24,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:46:24,114 INFO L470 AbstractCegarLoop]: Abstraction has 7316 states and 22087 transitions. [2022-02-15 14:46:24,114 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 2.152542372881356) internal successors, (127), 58 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:46:24,114 INFO L276 IsEmpty]: Start isEmpty. Operand 7316 states and 22087 transitions. [2022-02-15 14:46:24,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-02-15 14:46:24,123 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:46:24,123 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:46:24,139 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (130)] Forceful destruction successful, exit code 0 [2022-02-15 14:46:24,324 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable132 [2022-02-15 14:46:24,324 INFO L402 AbstractCegarLoop]: === Iteration 134 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 14:46:24,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:46:24,324 INFO L85 PathProgramCache]: Analyzing trace with hash 2091649819, now seen corresponding path program 42 times [2022-02-15 14:46:24,324 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:46:24,324 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [175826194] [2022-02-15 14:46:24,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:46:24,324 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:46:24,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:46:24,835 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:46:24,835 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:46:24,835 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [175826194] [2022-02-15 14:46:24,835 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [175826194] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:46:24,835 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1733767466] [2022-02-15 14:46:24,836 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-15 14:46:24,836 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:46:24,836 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:46:24,836 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) [2022-02-15 14:46:24,837 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (131)] Waiting until timeout for monitored process [2022-02-15 14:46:24,863 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-15 14:46:24,863 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:46:24,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 42 conjunts are in the unsatisfiable core [2022-02-15 14:46:24,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:46:25,052 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-02-15 14:46:25,248 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 11 treesize of output 7 [2022-02-15 14:46:25,804 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:46:25,804 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:46:26,535 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:46:26,535 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 36 [2022-02-15 14:46:26,660 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:46:26,660 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 39 [2022-02-15 14:46:26,890 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:46:26,890 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1733767466] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:46:26,890 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:46:26,890 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20, 20] total 54 [2022-02-15 14:46:26,890 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1330479884] [2022-02-15 14:46:26,890 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:46:26,890 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2022-02-15 14:46:26,890 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:46:26,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2022-02-15 14:46:26,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=242, Invalid=2728, Unknown=0, NotChecked=0, Total=2970 [2022-02-15 14:46:26,891 INFO L87 Difference]: Start difference. First operand 7316 states and 22087 transitions. Second operand has 55 states, 55 states have (on average 2.1454545454545455) internal successors, (118), 54 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:46:30,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:46:30,564 INFO L93 Difference]: Finished difference Result 16851 states and 50189 transitions. [2022-02-15 14:46:30,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-02-15 14:46:30,565 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 2.1454545454545455) internal successors, (118), 54 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2022-02-15 14:46:30,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:46:30,597 INFO L225 Difference]: With dead ends: 16851 [2022-02-15 14:46:30,597 INFO L226 Difference]: Without dead ends: 16629 [2022-02-15 14:46:30,598 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 56 SyntacticMatches, 10 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2680 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=684, Invalid=7688, Unknown=0, NotChecked=0, Total=8372 [2022-02-15 14:46:30,598 INFO L933 BasicCegarLoop]: 114 mSDtfsCounter, 443 mSDsluCounter, 4260 mSDsCounter, 0 mSdLazyCounter, 4295 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 443 SdHoareTripleChecker+Valid, 3056 SdHoareTripleChecker+Invalid, 4743 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 4295 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 354 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-02-15 14:46:30,598 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [443 Valid, 3056 Invalid, 4743 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 4295 Invalid, 0 Unknown, 354 Unchecked, 1.6s Time] [2022-02-15 14:46:30,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16629 states. [2022-02-15 14:46:30,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16629 to 7266. [2022-02-15 14:46:30,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7266 states, 7265 states have (on average 3.021885753613214) internal successors, (21954), 7265 states have internal predecessors, (21954), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:46:30,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7266 states to 7266 states and 21954 transitions. [2022-02-15 14:46:30,774 INFO L78 Accepts]: Start accepts. Automaton has 7266 states and 21954 transitions. Word has length 48 [2022-02-15 14:46:30,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:46:30,774 INFO L470 AbstractCegarLoop]: Abstraction has 7266 states and 21954 transitions. [2022-02-15 14:46:30,774 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 2.1454545454545455) internal successors, (118), 54 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:46:30,774 INFO L276 IsEmpty]: Start isEmpty. Operand 7266 states and 21954 transitions. [2022-02-15 14:46:30,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-02-15 14:46:30,783 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:46:30,783 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:46:30,800 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (131)] Ended with exit code 0 [2022-02-15 14:46:30,983 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 131 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable133 [2022-02-15 14:46:30,983 INFO L402 AbstractCegarLoop]: === Iteration 135 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 14:46:30,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:46:30,983 INFO L85 PathProgramCache]: Analyzing trace with hash -307920015, now seen corresponding path program 43 times [2022-02-15 14:46:30,983 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:46:30,984 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [766525496] [2022-02-15 14:46:30,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:46:30,984 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:46:30,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:46:31,554 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:46:31,555 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:46:31,555 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [766525496] [2022-02-15 14:46:31,555 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [766525496] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:46:31,555 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [15519616] [2022-02-15 14:46:31,555 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-15 14:46:31,555 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:46:31,555 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:46:31,556 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) [2022-02-15 14:46:31,556 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (132)] Waiting until timeout for monitored process [2022-02-15 14:46:31,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:46:31,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2022-02-15 14:46:31,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:46:31,774 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 15 treesize of output 7 [2022-02-15 14:46:31,959 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 15 treesize of output 7 [2022-02-15 14:46:32,451 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:46:32,451 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:46:33,175 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:46:33,175 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 36 [2022-02-15 14:46:33,301 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:46:33,301 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 37 treesize of output 39 [2022-02-15 14:46:33,533 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:46:33,533 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [15519616] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:46:33,533 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:46:33,533 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20, 20] total 53 [2022-02-15 14:46:33,533 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913064595] [2022-02-15 14:46:33,533 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:46:33,533 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2022-02-15 14:46:33,533 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:46:33,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2022-02-15 14:46:33,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=2629, Unknown=0, NotChecked=0, Total=2862 [2022-02-15 14:46:33,534 INFO L87 Difference]: Start difference. First operand 7266 states and 21954 transitions. Second operand has 54 states, 54 states have (on average 2.1666666666666665) internal successors, (117), 53 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:46:36,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:46:36,641 INFO L93 Difference]: Finished difference Result 13429 states and 40437 transitions. [2022-02-15 14:46:36,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-02-15 14:46:36,641 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 2.1666666666666665) internal successors, (117), 53 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2022-02-15 14:46:36,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:46:36,665 INFO L225 Difference]: With dead ends: 13429 [2022-02-15 14:46:36,665 INFO L226 Difference]: Without dead ends: 13394 [2022-02-15 14:46:36,666 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 58 SyntacticMatches, 6 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2055 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=637, Invalid=6503, Unknown=0, NotChecked=0, Total=7140 [2022-02-15 14:46:36,666 INFO L933 BasicCegarLoop]: 96 mSDtfsCounter, 428 mSDsluCounter, 2737 mSDsCounter, 0 mSdLazyCounter, 3350 mSolverCounterSat, 101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 428 SdHoareTripleChecker+Valid, 2110 SdHoareTripleChecker+Invalid, 3451 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 3350 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-02-15 14:46:36,666 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [428 Valid, 2110 Invalid, 3451 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 3350 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-02-15 14:46:36,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13394 states. [2022-02-15 14:46:36,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13394 to 7274. [2022-02-15 14:46:36,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7274 states, 7273 states have (on average 3.0211742059672764) internal successors, (21973), 7273 states have internal predecessors, (21973), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:46:36,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7274 states to 7274 states and 21973 transitions. [2022-02-15 14:46:36,803 INFO L78 Accepts]: Start accepts. Automaton has 7274 states and 21973 transitions. Word has length 48 [2022-02-15 14:46:36,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:46:36,803 INFO L470 AbstractCegarLoop]: Abstraction has 7274 states and 21973 transitions. [2022-02-15 14:46:36,803 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 2.1666666666666665) internal successors, (117), 53 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:46:36,803 INFO L276 IsEmpty]: Start isEmpty. Operand 7274 states and 21973 transitions. [2022-02-15 14:46:36,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-02-15 14:46:36,812 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:46:36,812 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:46:36,827 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (132)] Forceful destruction successful, exit code 0 [2022-02-15 14:46:37,012 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 132 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable134 [2022-02-15 14:46:37,012 INFO L402 AbstractCegarLoop]: === Iteration 136 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 14:46:37,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:46:37,013 INFO L85 PathProgramCache]: Analyzing trace with hash 568262449, now seen corresponding path program 44 times [2022-02-15 14:46:37,013 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:46:37,013 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [565642309] [2022-02-15 14:46:37,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:46:37,013 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:46:37,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:46:37,546 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:46:37,547 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:46:37,547 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [565642309] [2022-02-15 14:46:37,547 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [565642309] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:46:37,547 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [691020326] [2022-02-15 14:46:37,547 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-15 14:46:37,547 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:46:37,547 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:46:37,548 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) [2022-02-15 14:46:37,548 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (133)] Waiting until timeout for monitored process [2022-02-15 14:46:37,574 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-15 14:46:37,574 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:46:37,575 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2022-02-15 14:46:37,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:46:37,767 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-02-15 14:46:37,948 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-02-15 14:46:38,471 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:46:38,471 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:46:39,210 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:46:39,211 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 36 [2022-02-15 14:46:39,345 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:46:39,345 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 39 [2022-02-15 14:46:39,583 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:46:39,583 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [691020326] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:46:39,583 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:46:39,583 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20, 20] total 53 [2022-02-15 14:46:39,583 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [857839278] [2022-02-15 14:46:39,583 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:46:39,584 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2022-02-15 14:46:39,584 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:46:39,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2022-02-15 14:46:39,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=2629, Unknown=0, NotChecked=0, Total=2862 [2022-02-15 14:46:39,584 INFO L87 Difference]: Start difference. First operand 7274 states and 21973 transitions. Second operand has 54 states, 54 states have (on average 2.1666666666666665) internal successors, (117), 53 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:46:43,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:46:43,080 INFO L93 Difference]: Finished difference Result 13463 states and 40498 transitions. [2022-02-15 14:46:43,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-02-15 14:46:43,080 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 2.1666666666666665) internal successors, (117), 53 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2022-02-15 14:46:43,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:46:43,104 INFO L225 Difference]: With dead ends: 13463 [2022-02-15 14:46:43,104 INFO L226 Difference]: Without dead ends: 13419 [2022-02-15 14:46:43,105 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 57 SyntacticMatches, 7 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2106 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=672, Invalid=6638, Unknown=0, NotChecked=0, Total=7310 [2022-02-15 14:46:43,105 INFO L933 BasicCegarLoop]: 97 mSDtfsCounter, 436 mSDsluCounter, 3406 mSDsCounter, 0 mSdLazyCounter, 4143 mSolverCounterSat, 122 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 436 SdHoareTripleChecker+Valid, 2595 SdHoareTripleChecker+Invalid, 4265 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 122 IncrementalHoareTripleChecker+Valid, 4143 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-02-15 14:46:43,105 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [436 Valid, 2595 Invalid, 4265 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [122 Valid, 4143 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-02-15 14:46:43,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13419 states. [2022-02-15 14:46:43,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13419 to 7270. [2022-02-15 14:46:43,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7270 states, 7269 states have (on average 3.021736139771633) internal successors, (21965), 7269 states have internal predecessors, (21965), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:46:43,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7270 states to 7270 states and 21965 transitions. [2022-02-15 14:46:43,261 INFO L78 Accepts]: Start accepts. Automaton has 7270 states and 21965 transitions. Word has length 48 [2022-02-15 14:46:43,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:46:43,261 INFO L470 AbstractCegarLoop]: Abstraction has 7270 states and 21965 transitions. [2022-02-15 14:46:43,261 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 2.1666666666666665) internal successors, (117), 53 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:46:43,261 INFO L276 IsEmpty]: Start isEmpty. Operand 7270 states and 21965 transitions. [2022-02-15 14:46:43,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-02-15 14:46:43,270 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:46:43,270 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:46:43,285 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (133)] Forceful destruction successful, exit code 0 [2022-02-15 14:46:43,470 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable135 [2022-02-15 14:46:43,471 INFO L402 AbstractCegarLoop]: === Iteration 137 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 14:46:43,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:46:43,471 INFO L85 PathProgramCache]: Analyzing trace with hash -1534873679, now seen corresponding path program 45 times [2022-02-15 14:46:43,471 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:46:43,471 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1895119842] [2022-02-15 14:46:43,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:46:43,471 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:46:43,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:46:43,976 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:46:43,976 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:46:43,976 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1895119842] [2022-02-15 14:46:43,976 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1895119842] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:46:43,976 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1899870282] [2022-02-15 14:46:43,976 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-15 14:46:43,976 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:46:43,977 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:46:43,977 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) [2022-02-15 14:46:43,978 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (134)] Waiting until timeout for monitored process [2022-02-15 14:46:44,005 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-15 14:46:44,005 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:46:44,006 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2022-02-15 14:46:44,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:46:44,196 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 11 treesize of output 7 [2022-02-15 14:46:44,458 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 15 treesize of output 7 [2022-02-15 14:46:44,934 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:46:44,934 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:46:45,743 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:46:45,743 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 34 treesize of output 36 [2022-02-15 14:46:45,892 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:46:45,892 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 42 treesize of output 42 [2022-02-15 14:46:46,147 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:46:46,147 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1899870282] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:46:46,147 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:46:46,147 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 22, 22] total 57 [2022-02-15 14:46:46,148 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1905918094] [2022-02-15 14:46:46,148 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:46:46,148 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2022-02-15 14:46:46,148 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:46:46,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2022-02-15 14:46:46,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=265, Invalid=3041, Unknown=0, NotChecked=0, Total=3306 [2022-02-15 14:46:46,148 INFO L87 Difference]: Start difference. First operand 7270 states and 21965 transitions. Second operand has 58 states, 58 states have (on average 2.0172413793103448) internal successors, (117), 57 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:46:50,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:46:50,836 INFO L93 Difference]: Finished difference Result 17850 states and 52759 transitions. [2022-02-15 14:46:50,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-02-15 14:46:50,837 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 2.0172413793103448) internal successors, (117), 57 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2022-02-15 14:46:50,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:46:50,867 INFO L225 Difference]: With dead ends: 17850 [2022-02-15 14:46:50,867 INFO L226 Difference]: Without dead ends: 17815 [2022-02-15 14:46:50,868 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 54 SyntacticMatches, 6 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2819 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=755, Invalid=8947, Unknown=0, NotChecked=0, Total=9702 [2022-02-15 14:46:50,868 INFO L933 BasicCegarLoop]: 108 mSDtfsCounter, 376 mSDsluCounter, 4273 mSDsCounter, 0 mSdLazyCounter, 6008 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 376 SdHoareTripleChecker+Valid, 2892 SdHoareTripleChecker+Invalid, 6106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 6008 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-02-15 14:46:50,868 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [376 Valid, 2892 Invalid, 6106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 6008 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-02-15 14:46:50,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17815 states. [2022-02-15 14:46:51,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17815 to 7274. [2022-02-15 14:46:51,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7274 states, 7273 states have (on average 3.0211742059672764) internal successors, (21973), 7273 states have internal predecessors, (21973), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:46:51,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7274 states to 7274 states and 21973 transitions. [2022-02-15 14:46:51,032 INFO L78 Accepts]: Start accepts. Automaton has 7274 states and 21973 transitions. Word has length 48 [2022-02-15 14:46:51,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:46:51,033 INFO L470 AbstractCegarLoop]: Abstraction has 7274 states and 21973 transitions. [2022-02-15 14:46:51,033 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 2.0172413793103448) internal successors, (117), 57 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:46:51,033 INFO L276 IsEmpty]: Start isEmpty. Operand 7274 states and 21973 transitions. [2022-02-15 14:46:51,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-02-15 14:46:51,041 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:46:51,041 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:46:51,057 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (134)] Ended with exit code 0 [2022-02-15 14:46:51,241 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable136 [2022-02-15 14:46:51,242 INFO L402 AbstractCegarLoop]: === Iteration 138 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 14:46:51,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:46:51,242 INFO L85 PathProgramCache]: Analyzing trace with hash 927176213, now seen corresponding path program 46 times [2022-02-15 14:46:51,242 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:46:51,242 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [232097096] [2022-02-15 14:46:51,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:46:51,242 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:46:51,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:46:51,746 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:46:51,746 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:46:51,746 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [232097096] [2022-02-15 14:46:51,746 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [232097096] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:46:51,746 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1982796900] [2022-02-15 14:46:51,747 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-15 14:46:51,747 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:46:51,747 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:46:51,747 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) [2022-02-15 14:46:51,748 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (135)] Waiting until timeout for monitored process [2022-02-15 14:46:51,774 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-15 14:46:51,775 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:46:51,775 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2022-02-15 14:46:51,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:46:51,968 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-02-15 14:46:52,174 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 15 treesize of output 7 [2022-02-15 14:46:52,750 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:46:52,751 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:46:53,463 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:46:53,463 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 34 treesize of output 36 [2022-02-15 14:46:53,595 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:46:53,595 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 39 [2022-02-15 14:46:53,828 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:46:53,828 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1982796900] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:46:53,828 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:46:53,828 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20, 20] total 53 [2022-02-15 14:46:53,829 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [99153983] [2022-02-15 14:46:53,829 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:46:53,829 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2022-02-15 14:46:53,829 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:46:53,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2022-02-15 14:46:53,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=237, Invalid=2625, Unknown=0, NotChecked=0, Total=2862 [2022-02-15 14:46:53,829 INFO L87 Difference]: Start difference. First operand 7274 states and 21973 transitions. Second operand has 54 states, 54 states have (on average 2.1666666666666665) internal successors, (117), 53 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:46:56,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:46:56,661 INFO L93 Difference]: Finished difference Result 16658 states and 49790 transitions. [2022-02-15 14:46:56,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-02-15 14:46:56,662 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 2.1666666666666665) internal successors, (117), 53 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2022-02-15 14:46:56,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:46:56,691 INFO L225 Difference]: With dead ends: 16658 [2022-02-15 14:46:56,691 INFO L226 Difference]: Without dead ends: 16615 [2022-02-15 14:46:56,692 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 51 SyntacticMatches, 13 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2289 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=593, Invalid=6379, Unknown=0, NotChecked=0, Total=6972 [2022-02-15 14:46:56,692 INFO L933 BasicCegarLoop]: 96 mSDtfsCounter, 374 mSDsluCounter, 2742 mSDsCounter, 0 mSdLazyCounter, 3338 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 374 SdHoareTripleChecker+Valid, 2075 SdHoareTripleChecker+Invalid, 3432 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 3338 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-02-15 14:46:56,692 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [374 Valid, 2075 Invalid, 3432 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 3338 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-02-15 14:46:56,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16615 states. [2022-02-15 14:46:56,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16615 to 7270. [2022-02-15 14:46:56,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7270 states, 7269 states have (on average 3.0214609987618655) internal successors, (21963), 7269 states have internal predecessors, (21963), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:46:56,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7270 states to 7270 states and 21963 transitions. [2022-02-15 14:46:56,858 INFO L78 Accepts]: Start accepts. Automaton has 7270 states and 21963 transitions. Word has length 48 [2022-02-15 14:46:56,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:46:56,858 INFO L470 AbstractCegarLoop]: Abstraction has 7270 states and 21963 transitions. [2022-02-15 14:46:56,858 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 2.1666666666666665) internal successors, (117), 53 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:46:56,858 INFO L276 IsEmpty]: Start isEmpty. Operand 7270 states and 21963 transitions. [2022-02-15 14:46:56,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-02-15 14:46:56,867 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:46:56,867 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:46:56,883 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (135)] Forceful destruction successful, exit code 0 [2022-02-15 14:46:57,067 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 135 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable137 [2022-02-15 14:46:57,068 INFO L402 AbstractCegarLoop]: === Iteration 139 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 14:46:57,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:46:57,068 INFO L85 PathProgramCache]: Analyzing trace with hash 71228565, now seen corresponding path program 47 times [2022-02-15 14:46:57,068 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:46:57,068 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [389773756] [2022-02-15 14:46:57,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:46:57,068 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:46:57,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:46:57,579 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:46:57,580 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:46:57,580 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [389773756] [2022-02-15 14:46:57,580 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [389773756] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:46:57,580 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1045292130] [2022-02-15 14:46:57,580 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-15 14:46:57,580 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:46:57,580 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:46:57,581 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) [2022-02-15 14:46:57,581 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (136)] Waiting until timeout for monitored process [2022-02-15 14:46:57,609 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-15 14:46:57,609 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:46:57,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 42 conjunts are in the unsatisfiable core [2022-02-15 14:46:57,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:46:57,824 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 11 treesize of output 7 [2022-02-15 14:46:58,027 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-02-15 14:46:58,552 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:46:58,552 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:46:59,296 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:46:59,297 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 34 treesize of output 36 [2022-02-15 14:46:59,430 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:46:59,430 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 39 [2022-02-15 14:46:59,649 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:46:59,649 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1045292130] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:46:59,649 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:46:59,649 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20, 20] total 53 [2022-02-15 14:46:59,649 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336124232] [2022-02-15 14:46:59,649 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:46:59,650 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2022-02-15 14:46:59,650 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:46:59,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2022-02-15 14:46:59,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=2629, Unknown=0, NotChecked=0, Total=2862 [2022-02-15 14:46:59,650 INFO L87 Difference]: Start difference. First operand 7270 states and 21963 transitions. Second operand has 54 states, 54 states have (on average 2.1666666666666665) internal successors, (117), 53 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:47:03,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:47:03,065 INFO L93 Difference]: Finished difference Result 13462 states and 40500 transitions. [2022-02-15 14:47:03,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-02-15 14:47:03,065 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 2.1666666666666665) internal successors, (117), 53 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2022-02-15 14:47:03,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:47:03,088 INFO L225 Difference]: With dead ends: 13462 [2022-02-15 14:47:03,088 INFO L226 Difference]: Without dead ends: 13422 [2022-02-15 14:47:03,089 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 57 SyntacticMatches, 22 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2369 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=656, Invalid=6316, Unknown=0, NotChecked=0, Total=6972 [2022-02-15 14:47:03,089 INFO L933 BasicCegarLoop]: 96 mSDtfsCounter, 424 mSDsluCounter, 2929 mSDsCounter, 0 mSdLazyCounter, 3310 mSolverCounterSat, 110 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 424 SdHoareTripleChecker+Valid, 2248 SdHoareTripleChecker+Invalid, 3531 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 110 IncrementalHoareTripleChecker+Valid, 3310 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 111 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-02-15 14:47:03,089 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [424 Valid, 2248 Invalid, 3531 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [110 Valid, 3310 Invalid, 0 Unknown, 111 Unchecked, 1.2s Time] [2022-02-15 14:47:03,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13422 states. [2022-02-15 14:47:03,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13422 to 7276. [2022-02-15 14:47:03,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7276 states, 7275 states have (on average 3.0207560137457046) internal successors, (21976), 7275 states have internal predecessors, (21976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:47:03,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7276 states to 7276 states and 21976 transitions. [2022-02-15 14:47:03,268 INFO L78 Accepts]: Start accepts. Automaton has 7276 states and 21976 transitions. Word has length 48 [2022-02-15 14:47:03,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:47:03,269 INFO L470 AbstractCegarLoop]: Abstraction has 7276 states and 21976 transitions. [2022-02-15 14:47:03,269 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 2.1666666666666665) internal successors, (117), 53 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:47:03,269 INFO L276 IsEmpty]: Start isEmpty. Operand 7276 states and 21976 transitions. [2022-02-15 14:47:03,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-02-15 14:47:03,277 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:47:03,277 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:47:03,294 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (136)] Forceful destruction successful, exit code 0 [2022-02-15 14:47:03,477 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138,136 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:47:03,477 INFO L402 AbstractCegarLoop]: === Iteration 140 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 14:47:03,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:47:03,478 INFO L85 PathProgramCache]: Analyzing trace with hash -1595170021, now seen corresponding path program 48 times [2022-02-15 14:47:03,478 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:47:03,478 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [335320003] [2022-02-15 14:47:03,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:47:03,478 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:47:03,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:47:03,983 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:47:03,984 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:47:03,984 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [335320003] [2022-02-15 14:47:03,984 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [335320003] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:47:03,984 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [89743296] [2022-02-15 14:47:03,984 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-15 14:47:03,984 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:47:03,984 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:47:03,985 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) [2022-02-15 14:47:03,985 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (137)] Waiting until timeout for monitored process [2022-02-15 14:47:04,012 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-15 14:47:04,012 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:47:04,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2022-02-15 14:47:04,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:47:04,203 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-02-15 14:47:04,385 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 15 treesize of output 7 [2022-02-15 14:47:04,997 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:47:04,997 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:47:05,729 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:47:05,730 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 34 treesize of output 36 [2022-02-15 14:47:05,862 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:47:05,863 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 37 treesize of output 39 [2022-02-15 14:47:06,102 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:47:06,102 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [89743296] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:47:06,102 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:47:06,102 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20, 20] total 53 [2022-02-15 14:47:06,102 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [628713538] [2022-02-15 14:47:06,102 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:47:06,102 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2022-02-15 14:47:06,103 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:47:06,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2022-02-15 14:47:06,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=2629, Unknown=0, NotChecked=0, Total=2862 [2022-02-15 14:47:06,103 INFO L87 Difference]: Start difference. First operand 7276 states and 21976 transitions. Second operand has 54 states, 54 states have (on average 2.1666666666666665) internal successors, (117), 53 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:47:09,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:47:09,170 INFO L93 Difference]: Finished difference Result 13423 states and 40416 transitions. [2022-02-15 14:47:09,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-02-15 14:47:09,170 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 2.1666666666666665) internal successors, (117), 53 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2022-02-15 14:47:09,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:47:09,194 INFO L225 Difference]: With dead ends: 13423 [2022-02-15 14:47:09,194 INFO L226 Difference]: Without dead ends: 13376 [2022-02-15 14:47:09,194 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 51 SyntacticMatches, 13 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2270 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=637, Invalid=6503, Unknown=0, NotChecked=0, Total=7140 [2022-02-15 14:47:09,195 INFO L933 BasicCegarLoop]: 93 mSDtfsCounter, 414 mSDsluCounter, 2562 mSDsCounter, 0 mSdLazyCounter, 3221 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 414 SdHoareTripleChecker+Valid, 1966 SdHoareTripleChecker+Invalid, 3323 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 3221 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-02-15 14:47:09,195 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [414 Valid, 1966 Invalid, 3323 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 3221 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-02-15 14:47:09,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13376 states. [2022-02-15 14:47:09,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13376 to 7268. [2022-02-15 14:47:09,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7268 states, 7267 states have (on average 3.0216045135544243) internal successors, (21958), 7267 states have internal predecessors, (21958), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:47:09,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7268 states to 7268 states and 21958 transitions. [2022-02-15 14:47:09,338 INFO L78 Accepts]: Start accepts. Automaton has 7268 states and 21958 transitions. Word has length 48 [2022-02-15 14:47:09,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:47:09,338 INFO L470 AbstractCegarLoop]: Abstraction has 7268 states and 21958 transitions. [2022-02-15 14:47:09,338 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 2.1666666666666665) internal successors, (117), 53 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:47:09,338 INFO L276 IsEmpty]: Start isEmpty. Operand 7268 states and 21958 transitions. [2022-02-15 14:47:09,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-02-15 14:47:09,348 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:47:09,348 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:47:09,364 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (137)] Forceful destruction successful, exit code 0 [2022-02-15 14:47:09,549 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,SelfDestructingSolverStorable139 [2022-02-15 14:47:09,549 INFO L402 AbstractCegarLoop]: === Iteration 141 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 14:47:09,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:47:09,549 INFO L85 PathProgramCache]: Analyzing trace with hash 1813636165, now seen corresponding path program 49 times [2022-02-15 14:47:09,549 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:47:09,549 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1908449368] [2022-02-15 14:47:09,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:47:09,550 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:47:09,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:47:10,084 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:47:10,084 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:47:10,084 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1908449368] [2022-02-15 14:47:10,084 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1908449368] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:47:10,084 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [694273940] [2022-02-15 14:47:10,084 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-15 14:47:10,084 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:47:10,084 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:47:10,085 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) [2022-02-15 14:47:10,086 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (138)] Waiting until timeout for monitored process [2022-02-15 14:47:10,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:47:10,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2022-02-15 14:47:10,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:47:10,321 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 15 treesize of output 7 [2022-02-15 14:47:10,505 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 15 treesize of output 7 [2022-02-15 14:47:10,967 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:47:10,967 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:47:11,743 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:47:11,743 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 34 treesize of output 36 [2022-02-15 14:47:11,869 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:47:11,869 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 39 [2022-02-15 14:47:12,136 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:47:12,136 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [694273940] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:47:12,136 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:47:12,136 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20, 20] total 54 [2022-02-15 14:47:12,137 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1914854105] [2022-02-15 14:47:12,137 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:47:12,137 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2022-02-15 14:47:12,137 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:47:12,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2022-02-15 14:47:12,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=242, Invalid=2728, Unknown=0, NotChecked=0, Total=2970 [2022-02-15 14:47:12,137 INFO L87 Difference]: Start difference. First operand 7268 states and 21958 transitions. Second operand has 55 states, 55 states have (on average 2.1454545454545455) internal successors, (118), 54 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:47:15,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:47:15,155 INFO L93 Difference]: Finished difference Result 16711 states and 49903 transitions. [2022-02-15 14:47:15,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-02-15 14:47:15,155 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 2.1454545454545455) internal successors, (118), 54 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2022-02-15 14:47:15,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:47:15,185 INFO L225 Difference]: With dead ends: 16711 [2022-02-15 14:47:15,185 INFO L226 Difference]: Without dead ends: 16676 [2022-02-15 14:47:15,186 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 58 SyntacticMatches, 5 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2184 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=627, Invalid=6855, Unknown=0, NotChecked=0, Total=7482 [2022-02-15 14:47:15,186 INFO L933 BasicCegarLoop]: 105 mSDtfsCounter, 447 mSDsluCounter, 3138 mSDsCounter, 0 mSdLazyCounter, 3535 mSolverCounterSat, 112 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 447 SdHoareTripleChecker+Valid, 2425 SdHoareTripleChecker+Invalid, 3647 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 112 IncrementalHoareTripleChecker+Valid, 3535 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-02-15 14:47:15,186 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [447 Valid, 2425 Invalid, 3647 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [112 Valid, 3535 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-02-15 14:47:15,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16676 states. [2022-02-15 14:47:15,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16676 to 7276. [2022-02-15 14:47:15,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7276 states, 7275 states have (on average 3.0207560137457046) internal successors, (21976), 7275 states have internal predecessors, (21976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:47:15,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7276 states to 7276 states and 21976 transitions. [2022-02-15 14:47:15,363 INFO L78 Accepts]: Start accepts. Automaton has 7276 states and 21976 transitions. Word has length 48 [2022-02-15 14:47:15,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:47:15,364 INFO L470 AbstractCegarLoop]: Abstraction has 7276 states and 21976 transitions. [2022-02-15 14:47:15,364 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 2.1454545454545455) internal successors, (118), 54 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:47:15,364 INFO L276 IsEmpty]: Start isEmpty. Operand 7276 states and 21976 transitions. [2022-02-15 14:47:15,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-02-15 14:47:15,372 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:47:15,372 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:47:15,388 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (138)] Ended with exit code 0 [2022-02-15 14:47:15,573 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140,138 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:47:15,573 INFO L402 AbstractCegarLoop]: === Iteration 142 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 14:47:15,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:47:15,573 INFO L85 PathProgramCache]: Analyzing trace with hash -1605148667, now seen corresponding path program 50 times [2022-02-15 14:47:15,573 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:47:15,573 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1611840046] [2022-02-15 14:47:15,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:47:15,574 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:47:15,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:47:16,091 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:47:16,091 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:47:16,091 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1611840046] [2022-02-15 14:47:16,091 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1611840046] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:47:16,091 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1711617308] [2022-02-15 14:47:16,091 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-15 14:47:16,091 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:47:16,091 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:47:16,092 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) [2022-02-15 14:47:16,092 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (139)] Waiting until timeout for monitored process [2022-02-15 14:47:16,119 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-15 14:47:16,119 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:47:16,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2022-02-15 14:47:16,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:47:16,311 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-02-15 14:47:16,496 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 11 treesize of output 7 [2022-02-15 14:47:17,020 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:47:17,020 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:47:17,810 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:47:17,810 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 36 [2022-02-15 14:47:17,928 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:47:17,928 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 39 [2022-02-15 14:47:18,152 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:47:18,152 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1711617308] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:47:18,152 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:47:18,152 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20, 20] total 54 [2022-02-15 14:47:18,152 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1260120498] [2022-02-15 14:47:18,152 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:47:18,152 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2022-02-15 14:47:18,152 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:47:18,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2022-02-15 14:47:18,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=238, Invalid=2732, Unknown=0, NotChecked=0, Total=2970 [2022-02-15 14:47:18,153 INFO L87 Difference]: Start difference. First operand 7276 states and 21976 transitions. Second operand has 55 states, 55 states have (on average 2.1454545454545455) internal successors, (118), 54 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:47:21,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:47:21,331 INFO L93 Difference]: Finished difference Result 13477 states and 40533 transitions. [2022-02-15 14:47:21,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-02-15 14:47:21,331 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 2.1454545454545455) internal successors, (118), 54 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2022-02-15 14:47:21,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:47:21,353 INFO L225 Difference]: With dead ends: 13477 [2022-02-15 14:47:21,353 INFO L226 Difference]: Without dead ends: 13376 [2022-02-15 14:47:21,354 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 56 SyntacticMatches, 7 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2281 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=686, Invalid=7146, Unknown=0, NotChecked=0, Total=7832 [2022-02-15 14:47:21,354 INFO L933 BasicCegarLoop]: 102 mSDtfsCounter, 458 mSDsluCounter, 2953 mSDsCounter, 0 mSdLazyCounter, 3322 mSolverCounterSat, 116 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 458 SdHoareTripleChecker+Valid, 2252 SdHoareTripleChecker+Invalid, 3502 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 116 IncrementalHoareTripleChecker+Valid, 3322 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 64 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-02-15 14:47:21,354 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [458 Valid, 2252 Invalid, 3502 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [116 Valid, 3322 Invalid, 0 Unknown, 64 Unchecked, 1.2s Time] [2022-02-15 14:47:21,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13376 states. [2022-02-15 14:47:21,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13376 to 7268. [2022-02-15 14:47:21,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7268 states, 7267 states have (on average 3.0214669051878356) internal successors, (21957), 7267 states have internal predecessors, (21957), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:47:21,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7268 states to 7268 states and 21957 transitions. [2022-02-15 14:47:21,483 INFO L78 Accepts]: Start accepts. Automaton has 7268 states and 21957 transitions. Word has length 48 [2022-02-15 14:47:21,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:47:21,483 INFO L470 AbstractCegarLoop]: Abstraction has 7268 states and 21957 transitions. [2022-02-15 14:47:21,483 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 2.1454545454545455) internal successors, (118), 54 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:47:21,483 INFO L276 IsEmpty]: Start isEmpty. Operand 7268 states and 21957 transitions. [2022-02-15 14:47:21,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-02-15 14:47:21,492 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:47:21,492 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:47:21,507 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (139)] Forceful destruction successful, exit code 0 [2022-02-15 14:47:21,692 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141,139 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:47:21,692 INFO L402 AbstractCegarLoop]: === Iteration 143 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 14:47:21,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:47:21,692 INFO L85 PathProgramCache]: Analyzing trace with hash -331176551, now seen corresponding path program 51 times [2022-02-15 14:47:21,692 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:47:21,692 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1115363094] [2022-02-15 14:47:21,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:47:21,693 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:47:21,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:47:22,214 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:47:22,214 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:47:22,214 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1115363094] [2022-02-15 14:47:22,214 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1115363094] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:47:22,214 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [138554143] [2022-02-15 14:47:22,215 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-15 14:47:22,215 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:47:22,215 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:47:22,216 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) [2022-02-15 14:47:22,216 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (140)] Waiting until timeout for monitored process [2022-02-15 14:47:22,244 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-15 14:47:22,244 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:47:22,244 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 44 conjunts are in the unsatisfiable core [2022-02-15 14:47:22,245 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:47:22,444 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-02-15 14:47:22,625 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-02-15 14:47:23,214 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:47:23,214 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:47:24,135 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:47:24,135 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 39 treesize of output 39 [2022-02-15 14:47:24,340 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:47:24,340 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 63 [2022-02-15 14:47:24,568 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:47:24,568 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [138554143] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:47:24,568 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:47:24,568 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 22, 22] total 58 [2022-02-15 14:47:24,568 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117121112] [2022-02-15 14:47:24,568 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:47:24,569 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2022-02-15 14:47:24,569 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:47:24,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2022-02-15 14:47:24,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=295, Invalid=3127, Unknown=0, NotChecked=0, Total=3422 [2022-02-15 14:47:24,569 INFO L87 Difference]: Start difference. First operand 7268 states and 21957 transitions. Second operand has 59 states, 59 states have (on average 2.1016949152542375) internal successors, (124), 58 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:47:28,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:47:28,720 INFO L93 Difference]: Finished difference Result 16915 states and 50842 transitions. [2022-02-15 14:47:28,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-02-15 14:47:28,721 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 2.1016949152542375) internal successors, (124), 58 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2022-02-15 14:47:28,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:47:28,751 INFO L225 Difference]: With dead ends: 16915 [2022-02-15 14:47:28,751 INFO L226 Difference]: Without dead ends: 16836 [2022-02-15 14:47:28,752 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 52 SyntacticMatches, 7 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2966 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=957, Invalid=9143, Unknown=0, NotChecked=0, Total=10100 [2022-02-15 14:47:28,752 INFO L933 BasicCegarLoop]: 114 mSDtfsCounter, 648 mSDsluCounter, 3807 mSDsCounter, 0 mSdLazyCounter, 4589 mSolverCounterSat, 179 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 648 SdHoareTripleChecker+Valid, 2795 SdHoareTripleChecker+Invalid, 4768 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 179 IncrementalHoareTripleChecker+Valid, 4589 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-02-15 14:47:28,752 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [648 Valid, 2795 Invalid, 4768 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [179 Valid, 4589 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-02-15 14:47:28,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16836 states. [2022-02-15 14:47:28,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16836 to 7266. [2022-02-15 14:47:28,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7266 states, 7265 states have (on average 3.0216104611149346) internal successors, (21952), 7265 states have internal predecessors, (21952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:47:28,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7266 states to 7266 states and 21952 transitions. [2022-02-15 14:47:28,958 INFO L78 Accepts]: Start accepts. Automaton has 7266 states and 21952 transitions. Word has length 48 [2022-02-15 14:47:28,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:47:28,959 INFO L470 AbstractCegarLoop]: Abstraction has 7266 states and 21952 transitions. [2022-02-15 14:47:28,959 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 2.1016949152542375) internal successors, (124), 58 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:47:28,959 INFO L276 IsEmpty]: Start isEmpty. Operand 7266 states and 21952 transitions. [2022-02-15 14:47:28,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-02-15 14:47:28,967 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:47:28,967 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:47:28,983 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (140)] Ended with exit code 0 [2022-02-15 14:47:29,168 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,SelfDestructingSolverStorable142 [2022-02-15 14:47:29,168 INFO L402 AbstractCegarLoop]: === Iteration 144 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 14:47:29,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:47:29,168 INFO L85 PathProgramCache]: Analyzing trace with hash 875511443, now seen corresponding path program 52 times [2022-02-15 14:47:29,168 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:47:29,168 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1449621248] [2022-02-15 14:47:29,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:47:29,168 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:47:29,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:47:29,696 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:47:29,697 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:47:29,697 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1449621248] [2022-02-15 14:47:29,697 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1449621248] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:47:29,697 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1916358356] [2022-02-15 14:47:29,697 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-15 14:47:29,697 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:47:29,697 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:47:29,698 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) [2022-02-15 14:47:29,698 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (141)] Waiting until timeout for monitored process [2022-02-15 14:47:29,727 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-15 14:47:29,727 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:47:29,728 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2022-02-15 14:47:29,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:47:29,927 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-02-15 14:47:30,113 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 15 treesize of output 7 [2022-02-15 14:47:30,680 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:47:30,681 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:47:31,439 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:47:31,439 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 34 treesize of output 36 [2022-02-15 14:47:31,568 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:47:31,568 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 39 [2022-02-15 14:47:31,802 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:47:31,803 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1916358356] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:47:31,803 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:47:31,803 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20, 20] total 54 [2022-02-15 14:47:31,803 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1305693515] [2022-02-15 14:47:31,803 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:47:31,803 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2022-02-15 14:47:31,803 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:47:31,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2022-02-15 14:47:31,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=242, Invalid=2728, Unknown=0, NotChecked=0, Total=2970 [2022-02-15 14:47:31,804 INFO L87 Difference]: Start difference. First operand 7266 states and 21952 transitions. Second operand has 55 states, 55 states have (on average 2.1454545454545455) internal successors, (118), 54 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:47:35,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:47:35,012 INFO L93 Difference]: Finished difference Result 16692 states and 49855 transitions. [2022-02-15 14:47:35,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-02-15 14:47:35,012 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 2.1454545454545455) internal successors, (118), 54 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2022-02-15 14:47:35,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:47:35,043 INFO L225 Difference]: With dead ends: 16692 [2022-02-15 14:47:35,043 INFO L226 Difference]: Without dead ends: 16657 [2022-02-15 14:47:35,044 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 53 SyntacticMatches, 10 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2344 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=627, Invalid=6855, Unknown=0, NotChecked=0, Total=7482 [2022-02-15 14:47:35,044 INFO L933 BasicCegarLoop]: 107 mSDtfsCounter, 422 mSDsluCounter, 3174 mSDsCounter, 0 mSdLazyCounter, 3427 mSolverCounterSat, 111 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 422 SdHoareTripleChecker+Valid, 2457 SdHoareTripleChecker+Invalid, 3538 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 111 IncrementalHoareTripleChecker+Valid, 3427 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-02-15 14:47:35,044 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [422 Valid, 2457 Invalid, 3538 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [111 Valid, 3427 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-02-15 14:47:35,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16657 states. [2022-02-15 14:47:35,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16657 to 7270. [2022-02-15 14:47:35,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7270 states, 7269 states have (on average 3.0209107167423306) internal successors, (21959), 7269 states have internal predecessors, (21959), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:47:35,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7270 states to 7270 states and 21959 transitions. [2022-02-15 14:47:35,217 INFO L78 Accepts]: Start accepts. Automaton has 7270 states and 21959 transitions. Word has length 48 [2022-02-15 14:47:35,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:47:35,217 INFO L470 AbstractCegarLoop]: Abstraction has 7270 states and 21959 transitions. [2022-02-15 14:47:35,217 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 2.1454545454545455) internal successors, (118), 54 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:47:35,217 INFO L276 IsEmpty]: Start isEmpty. Operand 7270 states and 21959 transitions. [2022-02-15 14:47:35,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-02-15 14:47:35,226 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:47:35,226 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:47:35,242 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (141)] Ended with exit code 0 [2022-02-15 14:47:35,427 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143,141 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:47:35,427 INFO L402 AbstractCegarLoop]: === Iteration 145 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 14:47:35,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:47:35,427 INFO L85 PathProgramCache]: Analyzing trace with hash 1751693907, now seen corresponding path program 53 times [2022-02-15 14:47:35,427 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:47:35,427 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [190401246] [2022-02-15 14:47:35,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:47:35,427 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:47:35,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:47:35,953 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:47:35,954 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:47:35,954 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [190401246] [2022-02-15 14:47:35,954 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [190401246] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:47:35,954 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1416801750] [2022-02-15 14:47:35,954 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-15 14:47:35,954 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:47:35,954 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:47:35,955 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) [2022-02-15 14:47:35,955 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (142)] Waiting until timeout for monitored process [2022-02-15 14:47:35,983 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-15 14:47:35,983 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:47:35,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 42 conjunts are in the unsatisfiable core [2022-02-15 14:47:35,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:47:36,174 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 11 treesize of output 7 [2022-02-15 14:47:36,358 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-02-15 14:47:36,893 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:47:36,893 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:47:37,694 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:47:37,694 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 34 treesize of output 36 [2022-02-15 14:47:37,815 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:47:37,816 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 37 treesize of output 39 [2022-02-15 14:47:38,044 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:47:38,044 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1416801750] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:47:38,044 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:47:38,045 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20, 20] total 54 [2022-02-15 14:47:38,045 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1385283317] [2022-02-15 14:47:38,045 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:47:38,045 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2022-02-15 14:47:38,045 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:47:38,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2022-02-15 14:47:38,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=238, Invalid=2732, Unknown=0, NotChecked=0, Total=2970 [2022-02-15 14:47:38,045 INFO L87 Difference]: Start difference. First operand 7270 states and 21959 transitions. Second operand has 55 states, 55 states have (on average 2.1454545454545455) internal successors, (118), 54 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:47:41,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:47:41,513 INFO L93 Difference]: Finished difference Result 13418 states and 40404 transitions. [2022-02-15 14:47:41,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-02-15 14:47:41,513 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 2.1454545454545455) internal successors, (118), 54 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2022-02-15 14:47:41,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:47:41,539 INFO L225 Difference]: With dead ends: 13418 [2022-02-15 14:47:41,539 INFO L226 Difference]: Without dead ends: 13366 [2022-02-15 14:47:41,540 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 56 SyntacticMatches, 7 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2180 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=667, Invalid=6815, Unknown=0, NotChecked=0, Total=7482 [2022-02-15 14:47:41,540 INFO L933 BasicCegarLoop]: 100 mSDtfsCounter, 414 mSDsluCounter, 3505 mSDsCounter, 0 mSdLazyCounter, 3878 mSolverCounterSat, 112 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 414 SdHoareTripleChecker+Valid, 2599 SdHoareTripleChecker+Invalid, 4154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 112 IncrementalHoareTripleChecker+Valid, 3878 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 164 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-02-15 14:47:41,540 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [414 Valid, 2599 Invalid, 4154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [112 Valid, 3878 Invalid, 0 Unknown, 164 Unchecked, 1.4s Time] [2022-02-15 14:47:41,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13366 states. [2022-02-15 14:47:41,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13366 to 7258. [2022-02-15 14:47:41,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7258 states, 7257 states have (on average 3.0228744660327957) internal successors, (21937), 7257 states have internal predecessors, (21937), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:47:41,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7258 states to 7258 states and 21937 transitions. [2022-02-15 14:47:41,674 INFO L78 Accepts]: Start accepts. Automaton has 7258 states and 21937 transitions. Word has length 48 [2022-02-15 14:47:41,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:47:41,674 INFO L470 AbstractCegarLoop]: Abstraction has 7258 states and 21937 transitions. [2022-02-15 14:47:41,674 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 2.1454545454545455) internal successors, (118), 54 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:47:41,674 INFO L276 IsEmpty]: Start isEmpty. Operand 7258 states and 21937 transitions. [2022-02-15 14:47:41,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-02-15 14:47:41,682 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:47:41,682 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:47:41,698 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (142)] Ended with exit code 0 [2022-02-15 14:47:41,883 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable144,142 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:47:41,883 INFO L402 AbstractCegarLoop]: === Iteration 146 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 14:47:41,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:47:41,883 INFO L85 PathProgramCache]: Analyzing trace with hash 1880121557, now seen corresponding path program 54 times [2022-02-15 14:47:41,883 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:47:41,883 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1152203132] [2022-02-15 14:47:41,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:47:41,883 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:47:41,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:47:42,404 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:47:42,404 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:47:42,404 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1152203132] [2022-02-15 14:47:42,404 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1152203132] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:47:42,404 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2067285537] [2022-02-15 14:47:42,404 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-15 14:47:42,404 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:47:42,404 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:47:42,405 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) [2022-02-15 14:47:42,406 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (143)] Waiting until timeout for monitored process [2022-02-15 14:47:42,433 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-15 14:47:42,433 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:47:42,434 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 42 conjunts are in the unsatisfiable core [2022-02-15 14:47:42,435 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:47:42,622 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-02-15 14:47:42,811 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 11 treesize of output 7 [2022-02-15 14:47:43,383 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:47:43,383 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:47:44,146 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:47:44,147 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 36 [2022-02-15 14:47:44,280 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:47:44,281 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 39 [2022-02-15 14:47:44,517 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:47:44,517 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2067285537] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:47:44,517 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:47:44,517 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20, 20] total 54 [2022-02-15 14:47:44,517 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [151141793] [2022-02-15 14:47:44,517 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:47:44,517 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2022-02-15 14:47:44,517 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:47:44,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2022-02-15 14:47:44,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=238, Invalid=2732, Unknown=0, NotChecked=0, Total=2970 [2022-02-15 14:47:44,518 INFO L87 Difference]: Start difference. First operand 7258 states and 21937 transitions. Second operand has 55 states, 55 states have (on average 2.1636363636363636) internal successors, (119), 54 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) [2022-02-15 14:47:48,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:47:48,033 INFO L93 Difference]: Finished difference Result 13482 states and 40522 transitions. [2022-02-15 14:47:48,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-02-15 14:47:48,033 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 2.1636363636363636) internal successors, (119), 54 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) Word has length 48 [2022-02-15 14:47:48,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:47:48,056 INFO L225 Difference]: With dead ends: 13482 [2022-02-15 14:47:48,057 INFO L226 Difference]: Without dead ends: 13413 [2022-02-15 14:47:48,057 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 56 SyntacticMatches, 7 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2330 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=701, Invalid=7309, Unknown=0, NotChecked=0, Total=8010 [2022-02-15 14:47:48,057 INFO L933 BasicCegarLoop]: 101 mSDtfsCounter, 460 mSDsluCounter, 3553 mSDsCounter, 0 mSdLazyCounter, 3972 mSolverCounterSat, 116 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 460 SdHoareTripleChecker+Valid, 2613 SdHoareTripleChecker+Invalid, 4188 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 116 IncrementalHoareTripleChecker+Valid, 3972 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 100 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-02-15 14:47:48,057 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [460 Valid, 2613 Invalid, 4188 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [116 Valid, 3972 Invalid, 0 Unknown, 100 Unchecked, 1.5s Time] [2022-02-15 14:47:48,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13413 states. [2022-02-15 14:47:48,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13413 to 7264. [2022-02-15 14:47:48,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7264 states, 7263 states have (on average 3.0218917802560927) internal successors, (21948), 7263 states have internal predecessors, (21948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:47:48,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7264 states to 7264 states and 21948 transitions. [2022-02-15 14:47:48,234 INFO L78 Accepts]: Start accepts. Automaton has 7264 states and 21948 transitions. Word has length 48 [2022-02-15 14:47:48,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:47:48,234 INFO L470 AbstractCegarLoop]: Abstraction has 7264 states and 21948 transitions. [2022-02-15 14:47:48,234 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 2.1636363636363636) internal successors, (119), 54 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) [2022-02-15 14:47:48,234 INFO L276 IsEmpty]: Start isEmpty. Operand 7264 states and 21948 transitions. [2022-02-15 14:47:48,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-02-15 14:47:48,242 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:47:48,242 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:47:48,258 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (143)] Forceful destruction successful, exit code 0 [2022-02-15 14:47:48,442 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,SelfDestructingSolverStorable145 [2022-02-15 14:47:48,443 INFO L402 AbstractCegarLoop]: === Iteration 147 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 14:47:48,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:47:48,443 INFO L85 PathProgramCache]: Analyzing trace with hash 213722971, now seen corresponding path program 55 times [2022-02-15 14:47:48,443 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:47:48,443 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1223406330] [2022-02-15 14:47:48,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:47:48,443 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:47:48,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:47:48,958 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:47:48,958 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:47:48,959 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1223406330] [2022-02-15 14:47:48,959 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1223406330] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:47:48,959 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1073515909] [2022-02-15 14:47:48,959 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-15 14:47:48,959 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:47:48,959 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:47:48,960 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) [2022-02-15 14:47:48,960 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (144)] Waiting until timeout for monitored process [2022-02-15 14:47:48,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:47:48,988 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2022-02-15 14:47:48,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:47:49,184 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-02-15 14:47:49,378 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-02-15 14:47:49,991 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:47:49,991 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:47:50,761 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:47:50,762 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 34 treesize of output 36 [2022-02-15 14:47:50,896 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:47:50,897 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 39 [2022-02-15 14:47:51,137 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:47:51,137 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1073515909] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:47:51,137 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:47:51,137 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20, 20] total 54 [2022-02-15 14:47:51,137 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [779101228] [2022-02-15 14:47:51,137 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:47:51,137 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2022-02-15 14:47:51,137 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:47:51,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2022-02-15 14:47:51,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=242, Invalid=2728, Unknown=0, NotChecked=0, Total=2970 [2022-02-15 14:47:51,138 INFO L87 Difference]: Start difference. First operand 7264 states and 21948 transitions. Second operand has 55 states, 55 states have (on average 2.1636363636363636) internal successors, (119), 54 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) [2022-02-15 14:47:54,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:47:54,267 INFO L93 Difference]: Finished difference Result 16648 states and 49765 transitions. [2022-02-15 14:47:54,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-02-15 14:47:54,268 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 2.1636363636363636) internal successors, (119), 54 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) Word has length 48 [2022-02-15 14:47:54,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:47:54,295 INFO L225 Difference]: With dead ends: 16648 [2022-02-15 14:47:54,295 INFO L226 Difference]: Without dead ends: 16597 [2022-02-15 14:47:54,296 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 52 SyntacticMatches, 11 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2325 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=619, Invalid=6691, Unknown=0, NotChecked=0, Total=7310 [2022-02-15 14:47:54,296 INFO L933 BasicCegarLoop]: 99 mSDtfsCounter, 378 mSDsluCounter, 3224 mSDsCounter, 0 mSdLazyCounter, 3712 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 378 SdHoareTripleChecker+Valid, 2418 SdHoareTripleChecker+Invalid, 3821 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 3712 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-02-15 14:47:54,296 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [378 Valid, 2418 Invalid, 3821 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [109 Valid, 3712 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-02-15 14:47:54,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16597 states. [2022-02-15 14:47:54,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16597 to 7252. [2022-02-15 14:47:54,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7252 states, 7251 states have (on average 3.02247965797821) internal successors, (21916), 7251 states have internal predecessors, (21916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:47:54,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7252 states to 7252 states and 21916 transitions. [2022-02-15 14:47:54,460 INFO L78 Accepts]: Start accepts. Automaton has 7252 states and 21916 transitions. Word has length 48 [2022-02-15 14:47:54,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:47:54,460 INFO L470 AbstractCegarLoop]: Abstraction has 7252 states and 21916 transitions. [2022-02-15 14:47:54,460 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 2.1636363636363636) internal successors, (119), 54 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) [2022-02-15 14:47:54,460 INFO L276 IsEmpty]: Start isEmpty. Operand 7252 states and 21916 transitions. [2022-02-15 14:47:54,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-02-15 14:47:54,469 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:47:54,469 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:47:54,485 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (144)] Forceful destruction successful, exit code 0 [2022-02-15 14:47:54,669 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 144 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable146 [2022-02-15 14:47:54,670 INFO L402 AbstractCegarLoop]: === Iteration 148 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 14:47:54,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:47:54,670 INFO L85 PathProgramCache]: Analyzing trace with hash 988891109, now seen corresponding path program 56 times [2022-02-15 14:47:54,670 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:47:54,670 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [412515269] [2022-02-15 14:47:54,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:47:54,670 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:47:54,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:47:55,181 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:47:55,181 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:47:55,181 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [412515269] [2022-02-15 14:47:55,181 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [412515269] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:47:55,181 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [70967267] [2022-02-15 14:47:55,181 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-15 14:47:55,181 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:47:55,182 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:47:55,182 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) [2022-02-15 14:47:55,183 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (145)] Waiting until timeout for monitored process [2022-02-15 14:47:55,209 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-15 14:47:55,210 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:47:55,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2022-02-15 14:47:55,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:47:55,397 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-02-15 14:47:55,582 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-02-15 14:47:56,168 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:47:56,169 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:47:56,925 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:47:56,925 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 36 [2022-02-15 14:47:57,055 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:47:57,056 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 39 [2022-02-15 14:47:57,285 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:47:57,286 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [70967267] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:47:57,286 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:47:57,286 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19, 19] total 52 [2022-02-15 14:47:57,286 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1795163416] [2022-02-15 14:47:57,286 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:47:57,286 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-02-15 14:47:57,286 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:47:57,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-02-15 14:47:57,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=2523, Unknown=0, NotChecked=0, Total=2756 [2022-02-15 14:47:57,287 INFO L87 Difference]: Start difference. First operand 7252 states and 21916 transitions. Second operand has 53 states, 53 states have (on average 2.2830188679245285) internal successors, (121), 52 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:48:00,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:48:00,676 INFO L93 Difference]: Finished difference Result 16628 states and 49663 transitions. [2022-02-15 14:48:00,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-02-15 14:48:00,677 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 2.2830188679245285) internal successors, (121), 52 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2022-02-15 14:48:00,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:48:00,706 INFO L225 Difference]: With dead ends: 16628 [2022-02-15 14:48:00,706 INFO L226 Difference]: Without dead ends: 16546 [2022-02-15 14:48:00,706 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 54 SyntacticMatches, 11 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2266 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=635, Invalid=6675, Unknown=0, NotChecked=0, Total=7310 [2022-02-15 14:48:00,706 INFO L933 BasicCegarLoop]: 114 mSDtfsCounter, 407 mSDsluCounter, 3770 mSDsCounter, 0 mSdLazyCounter, 4013 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 407 SdHoareTripleChecker+Valid, 2745 SdHoareTripleChecker+Invalid, 4199 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 4013 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 98 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-02-15 14:48:00,707 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [407 Valid, 2745 Invalid, 4199 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 4013 Invalid, 0 Unknown, 98 Unchecked, 1.5s Time] [2022-02-15 14:48:00,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16546 states. [2022-02-15 14:48:00,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16546 to 7182. [2022-02-15 14:48:00,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7182 states, 7181 states have (on average 3.0320289653251637) internal successors, (21773), 7181 states have internal predecessors, (21773), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:48:00,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7182 states to 7182 states and 21773 transitions. [2022-02-15 14:48:00,870 INFO L78 Accepts]: Start accepts. Automaton has 7182 states and 21773 transitions. Word has length 48 [2022-02-15 14:48:00,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:48:00,870 INFO L470 AbstractCegarLoop]: Abstraction has 7182 states and 21773 transitions. [2022-02-15 14:48:00,871 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 2.2830188679245285) internal successors, (121), 52 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:48:00,871 INFO L276 IsEmpty]: Start isEmpty. Operand 7182 states and 21773 transitions. [2022-02-15 14:48:00,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-02-15 14:48:00,898 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:48:00,898 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:48:00,913 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (145)] Forceful destruction successful, exit code 0 [2022-02-15 14:48:01,098 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable147 [2022-02-15 14:48:01,098 INFO L402 AbstractCegarLoop]: === Iteration 149 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 14:48:01,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:48:01,098 INFO L85 PathProgramCache]: Analyzing trace with hash -1985868295, now seen corresponding path program 57 times [2022-02-15 14:48:01,098 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:48:01,098 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1547441686] [2022-02-15 14:48:01,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:48:01,099 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:48:01,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:48:01,606 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:48:01,606 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:48:01,606 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1547441686] [2022-02-15 14:48:01,607 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1547441686] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:48:01,607 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [537274932] [2022-02-15 14:48:01,607 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-15 14:48:01,607 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:48:01,607 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:48:01,608 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) [2022-02-15 14:48:01,608 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (146)] Waiting until timeout for monitored process [2022-02-15 14:48:01,635 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-15 14:48:01,636 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:48:01,636 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2022-02-15 14:48:01,637 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:48:01,830 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 11 treesize of output 7 [2022-02-15 14:48:02,089 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-02-15 14:48:02,595 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:48:02,595 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:48:03,392 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:48:03,392 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 34 treesize of output 36 [2022-02-15 14:48:03,540 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:48:03,541 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 42 [2022-02-15 14:48:03,776 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:48:03,776 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [537274932] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:48:03,776 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:48:03,776 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 22, 22] total 56 [2022-02-15 14:48:03,776 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1101143700] [2022-02-15 14:48:03,776 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:48:03,776 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2022-02-15 14:48:03,777 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:48:03,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2022-02-15 14:48:03,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=234, Invalid=2958, Unknown=0, NotChecked=0, Total=3192 [2022-02-15 14:48:03,777 INFO L87 Difference]: Start difference. First operand 7182 states and 21773 transitions. Second operand has 57 states, 57 states have (on average 2.017543859649123) internal successors, (115), 56 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:48:08,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:48:08,109 INFO L93 Difference]: Finished difference Result 16459 states and 48695 transitions. [2022-02-15 14:48:08,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-02-15 14:48:08,109 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 2.017543859649123) internal successors, (115), 56 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2022-02-15 14:48:08,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:48:08,140 INFO L225 Difference]: With dead ends: 16459 [2022-02-15 14:48:08,140 INFO L226 Difference]: Without dead ends: 16405 [2022-02-15 14:48:08,140 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 55 SyntacticMatches, 6 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2545 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=650, Invalid=8856, Unknown=0, NotChecked=0, Total=9506 [2022-02-15 14:48:08,141 INFO L933 BasicCegarLoop]: 137 mSDtfsCounter, 315 mSDsluCounter, 3920 mSDsCounter, 0 mSdLazyCounter, 5432 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 315 SdHoareTripleChecker+Valid, 2909 SdHoareTripleChecker+Invalid, 5507 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 5432 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-02-15 14:48:08,141 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [315 Valid, 2909 Invalid, 5507 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 5432 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-02-15 14:48:08,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16405 states. [2022-02-15 14:48:08,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16405 to 7194. [2022-02-15 14:48:08,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7194 states, 7193 states have (on average 3.0310023634088696) internal successors, (21802), 7193 states have internal predecessors, (21802), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:48:08,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7194 states to 7194 states and 21802 transitions. [2022-02-15 14:48:08,298 INFO L78 Accepts]: Start accepts. Automaton has 7194 states and 21802 transitions. Word has length 48 [2022-02-15 14:48:08,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:48:08,298 INFO L470 AbstractCegarLoop]: Abstraction has 7194 states and 21802 transitions. [2022-02-15 14:48:08,299 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 2.017543859649123) internal successors, (115), 56 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:48:08,299 INFO L276 IsEmpty]: Start isEmpty. Operand 7194 states and 21802 transitions. [2022-02-15 14:48:08,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-02-15 14:48:08,307 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:48:08,307 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:48:08,323 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (146)] Forceful destruction successful, exit code 0 [2022-02-15 14:48:08,508 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable148,146 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:48:08,508 INFO L402 AbstractCegarLoop]: === Iteration 150 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 14:48:08,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:48:08,508 INFO L85 PathProgramCache]: Analyzing trace with hash -1109685831, now seen corresponding path program 58 times [2022-02-15 14:48:08,508 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:48:08,508 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [246977114] [2022-02-15 14:48:08,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:48:08,508 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:48:08,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:48:09,017 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:48:09,017 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:48:09,017 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [246977114] [2022-02-15 14:48:09,017 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [246977114] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:48:09,017 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [420436385] [2022-02-15 14:48:09,017 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-15 14:48:09,017 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:48:09,018 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:48:09,018 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) [2022-02-15 14:48:09,019 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (147)] Waiting until timeout for monitored process [2022-02-15 14:48:09,045 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-15 14:48:09,045 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:48:09,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2022-02-15 14:48:09,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:48:09,257 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-02-15 14:48:09,447 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 15 treesize of output 7 [2022-02-15 14:48:10,001 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:48:10,001 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:48:10,713 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:48:10,713 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 34 treesize of output 36 [2022-02-15 14:48:10,846 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:48:10,846 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 39 [2022-02-15 14:48:11,072 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:48:11,072 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [420436385] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:48:11,072 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:48:11,072 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20, 20] total 52 [2022-02-15 14:48:11,072 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982737819] [2022-02-15 14:48:11,072 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:48:11,072 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-02-15 14:48:11,072 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:48:11,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-02-15 14:48:11,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=204, Invalid=2552, Unknown=0, NotChecked=0, Total=2756 [2022-02-15 14:48:11,073 INFO L87 Difference]: Start difference. First operand 7194 states and 21802 transitions. Second operand has 53 states, 53 states have (on average 2.169811320754717) internal successors, (115), 52 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:48:13,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:48:13,565 INFO L93 Difference]: Finished difference Result 12686 states and 38269 transitions. [2022-02-15 14:48:13,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-02-15 14:48:13,565 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 2.169811320754717) internal successors, (115), 52 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2022-02-15 14:48:13,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:48:13,587 INFO L225 Difference]: With dead ends: 12686 [2022-02-15 14:48:13,587 INFO L226 Difference]: Without dead ends: 12642 [2022-02-15 14:48:13,588 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 56 SyntacticMatches, 9 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1720 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=483, Invalid=5679, Unknown=0, NotChecked=0, Total=6162 [2022-02-15 14:48:13,588 INFO L933 BasicCegarLoop]: 109 mSDtfsCounter, 326 mSDsluCounter, 2639 mSDsCounter, 0 mSdLazyCounter, 2749 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 326 SdHoareTripleChecker+Valid, 2119 SdHoareTripleChecker+Invalid, 2831 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 2749 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-02-15 14:48:13,588 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [326 Valid, 2119 Invalid, 2831 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 2749 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-02-15 14:48:13,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12642 states. [2022-02-15 14:48:13,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12642 to 7190. [2022-02-15 14:48:13,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7190 states, 7189 states have (on average 3.0311587147030186) internal successors, (21791), 7189 states have internal predecessors, (21791), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:48:13,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7190 states to 7190 states and 21791 transitions. [2022-02-15 14:48:13,718 INFO L78 Accepts]: Start accepts. Automaton has 7190 states and 21791 transitions. Word has length 48 [2022-02-15 14:48:13,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:48:13,718 INFO L470 AbstractCegarLoop]: Abstraction has 7190 states and 21791 transitions. [2022-02-15 14:48:13,719 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 2.169811320754717) internal successors, (115), 52 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:48:13,719 INFO L276 IsEmpty]: Start isEmpty. Operand 7190 states and 21791 transitions. [2022-02-15 14:48:13,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-02-15 14:48:13,727 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:48:13,727 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:48:13,743 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (147)] Ended with exit code 0 [2022-02-15 14:48:13,928 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable149,147 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:48:13,928 INFO L402 AbstractCegarLoop]: === Iteration 151 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 14:48:13,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:48:13,928 INFO L85 PathProgramCache]: Analyzing trace with hash -1844153155, now seen corresponding path program 59 times [2022-02-15 14:48:13,928 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:48:13,928 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [827955269] [2022-02-15 14:48:13,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:48:13,928 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:48:13,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:48:14,482 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:48:14,482 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:48:14,482 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [827955269] [2022-02-15 14:48:14,482 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [827955269] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:48:14,482 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1577488957] [2022-02-15 14:48:14,482 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-15 14:48:14,482 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:48:14,483 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:48:14,483 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) [2022-02-15 14:48:14,484 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (148)] Waiting until timeout for monitored process [2022-02-15 14:48:14,510 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-15 14:48:14,511 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:48:14,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 42 conjunts are in the unsatisfiable core [2022-02-15 14:48:14,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:48:14,696 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-02-15 14:48:14,880 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 11 treesize of output 7 [2022-02-15 14:48:15,369 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:48:15,369 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:48:16,090 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:48:16,091 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 36 [2022-02-15 14:48:16,213 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:48:16,213 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 37 treesize of output 39 [2022-02-15 14:48:16,448 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:48:16,448 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1577488957] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:48:16,449 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:48:16,449 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20, 20] total 53 [2022-02-15 14:48:16,449 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [338513680] [2022-02-15 14:48:16,449 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:48:16,449 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2022-02-15 14:48:16,449 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:48:16,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2022-02-15 14:48:16,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=213, Invalid=2649, Unknown=0, NotChecked=0, Total=2862 [2022-02-15 14:48:16,450 INFO L87 Difference]: Start difference. First operand 7190 states and 21791 transitions. Second operand has 54 states, 54 states have (on average 2.1666666666666665) internal successors, (117), 53 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:48:19,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:48:19,128 INFO L93 Difference]: Finished difference Result 15470 states and 46197 transitions. [2022-02-15 14:48:19,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-02-15 14:48:19,128 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 2.1666666666666665) internal successors, (117), 53 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2022-02-15 14:48:19,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:48:19,154 INFO L225 Difference]: With dead ends: 15470 [2022-02-15 14:48:19,155 INFO L226 Difference]: Without dead ends: 15413 [2022-02-15 14:48:19,155 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 58 SyntacticMatches, 6 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1748 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=475, Invalid=5845, Unknown=0, NotChecked=0, Total=6320 [2022-02-15 14:48:19,155 INFO L933 BasicCegarLoop]: 124 mSDtfsCounter, 339 mSDsluCounter, 3710 mSDsCounter, 0 mSdLazyCounter, 3731 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 339 SdHoareTripleChecker+Valid, 2918 SdHoareTripleChecker+Invalid, 3812 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 3731 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-02-15 14:48:19,155 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [339 Valid, 2918 Invalid, 3812 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 3731 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-02-15 14:48:19,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15413 states. [2022-02-15 14:48:19,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15413 to 7196. [2022-02-15 14:48:19,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7196 states, 7195 states have (on average 3.030437804030577) internal successors, (21804), 7195 states have internal predecessors, (21804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:48:19,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7196 states to 7196 states and 21804 transitions. [2022-02-15 14:48:19,327 INFO L78 Accepts]: Start accepts. Automaton has 7196 states and 21804 transitions. Word has length 48 [2022-02-15 14:48:19,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:48:19,327 INFO L470 AbstractCegarLoop]: Abstraction has 7196 states and 21804 transitions. [2022-02-15 14:48:19,328 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 2.1666666666666665) internal successors, (117), 53 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:48:19,328 INFO L276 IsEmpty]: Start isEmpty. Operand 7196 states and 21804 transitions. [2022-02-15 14:48:19,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-02-15 14:48:19,336 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:48:19,336 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:48:19,352 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (148)] Forceful destruction successful, exit code 0 [2022-02-15 14:48:19,536 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150,148 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:48:19,537 INFO L402 AbstractCegarLoop]: === Iteration 152 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 14:48:19,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:48:19,537 INFO L85 PathProgramCache]: Analyzing trace with hash 1167666681, now seen corresponding path program 60 times [2022-02-15 14:48:19,537 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:48:19,537 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [247645466] [2022-02-15 14:48:19,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:48:19,537 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:48:19,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:48:20,057 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:48:20,058 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:48:20,058 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [247645466] [2022-02-15 14:48:20,058 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [247645466] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:48:20,058 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1947846444] [2022-02-15 14:48:20,058 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-15 14:48:20,058 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:48:20,058 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:48:20,059 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) [2022-02-15 14:48:20,059 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (149)] Waiting until timeout for monitored process [2022-02-15 14:48:20,086 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-15 14:48:20,086 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:48:20,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 44 conjunts are in the unsatisfiable core [2022-02-15 14:48:20,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:48:20,274 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-02-15 14:48:20,455 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-02-15 14:48:21,046 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:48:21,047 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:48:21,997 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:48:21,997 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 39 treesize of output 39 [2022-02-15 14:48:22,203 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:48:22,203 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 63 [2022-02-15 14:48:22,454 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:48:22,454 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1947846444] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:48:22,454 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:48:22,454 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 23, 23] total 60 [2022-02-15 14:48:22,454 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1494184131] [2022-02-15 14:48:22,454 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:48:22,454 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2022-02-15 14:48:22,455 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:48:22,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2022-02-15 14:48:22,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=271, Invalid=3389, Unknown=0, NotChecked=0, Total=3660 [2022-02-15 14:48:22,455 INFO L87 Difference]: Start difference. First operand 7196 states and 21804 transitions. Second operand has 61 states, 61 states have (on average 2.098360655737705) internal successors, (128), 60 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:48:25,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:48:25,335 INFO L93 Difference]: Finished difference Result 15421 states and 46118 transitions. [2022-02-15 14:48:25,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-02-15 14:48:25,336 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 2.098360655737705) internal successors, (128), 60 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2022-02-15 14:48:25,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:48:25,362 INFO L225 Difference]: With dead ends: 15421 [2022-02-15 14:48:25,362 INFO L226 Difference]: Without dead ends: 15305 [2022-02-15 14:48:25,363 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 52 SyntacticMatches, 5 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2385 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=588, Invalid=7602, Unknown=0, NotChecked=0, Total=8190 [2022-02-15 14:48:25,363 INFO L933 BasicCegarLoop]: 131 mSDtfsCounter, 442 mSDsluCounter, 3462 mSDsCounter, 0 mSdLazyCounter, 3592 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 442 SdHoareTripleChecker+Valid, 2634 SdHoareTripleChecker+Invalid, 3697 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 3592 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-02-15 14:48:25,363 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [442 Valid, 2634 Invalid, 3697 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 3592 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-02-15 14:48:25,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15305 states. [2022-02-15 14:48:25,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15305 to 7176. [2022-02-15 14:48:25,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7176 states, 7175 states have (on average 3.032891986062718) internal successors, (21761), 7175 states have internal predecessors, (21761), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:48:25,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7176 states to 7176 states and 21761 transitions. [2022-02-15 14:48:25,521 INFO L78 Accepts]: Start accepts. Automaton has 7176 states and 21761 transitions. Word has length 48 [2022-02-15 14:48:25,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:48:25,521 INFO L470 AbstractCegarLoop]: Abstraction has 7176 states and 21761 transitions. [2022-02-15 14:48:25,521 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 2.098360655737705) internal successors, (128), 60 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:48:25,521 INFO L276 IsEmpty]: Start isEmpty. Operand 7176 states and 21761 transitions. [2022-02-15 14:48:25,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-02-15 14:48:25,530 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:48:25,530 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:48:25,546 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (149)] Forceful destruction successful, exit code 0 [2022-02-15 14:48:25,731 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151,149 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:48:25,731 INFO L402 AbstractCegarLoop]: === Iteration 153 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 14:48:25,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:48:25,732 INFO L85 PathProgramCache]: Analyzing trace with hash -1438624929, now seen corresponding path program 61 times [2022-02-15 14:48:25,732 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:48:25,732 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [352128285] [2022-02-15 14:48:25,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:48:25,732 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:48:25,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:48:26,248 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:48:26,248 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:48:26,248 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [352128285] [2022-02-15 14:48:26,248 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [352128285] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:48:26,248 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [444581086] [2022-02-15 14:48:26,248 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-15 14:48:26,248 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:48:26,248 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:48:26,249 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) [2022-02-15 14:48:26,249 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (150)] Waiting until timeout for monitored process [2022-02-15 14:48:26,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:48:26,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2022-02-15 14:48:26,276 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:48:26,469 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-02-15 14:48:26,678 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-02-15 14:48:27,234 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:48:27,234 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:48:27,957 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:48:27,958 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 36 [2022-02-15 14:48:28,084 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:48:28,084 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 39 [2022-02-15 14:48:28,311 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:48:28,311 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [444581086] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:48:28,311 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:48:28,311 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20, 20] total 52 [2022-02-15 14:48:28,311 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2045217149] [2022-02-15 14:48:28,311 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:48:28,312 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-02-15 14:48:28,312 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:48:28,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-02-15 14:48:28,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=204, Invalid=2552, Unknown=0, NotChecked=0, Total=2756 [2022-02-15 14:48:28,312 INFO L87 Difference]: Start difference. First operand 7176 states and 21761 transitions. Second operand has 53 states, 53 states have (on average 2.169811320754717) internal successors, (115), 52 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:48:31,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:48:31,097 INFO L93 Difference]: Finished difference Result 12727 states and 38354 transitions. [2022-02-15 14:48:31,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-02-15 14:48:31,097 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 2.169811320754717) internal successors, (115), 52 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2022-02-15 14:48:31,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:48:31,119 INFO L225 Difference]: With dead ends: 12727 [2022-02-15 14:48:31,119 INFO L226 Difference]: Without dead ends: 12687 [2022-02-15 14:48:31,119 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 56 SyntacticMatches, 9 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1761 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=489, Invalid=5831, Unknown=0, NotChecked=0, Total=6320 [2022-02-15 14:48:31,120 INFO L933 BasicCegarLoop]: 107 mSDtfsCounter, 365 mSDsluCounter, 3051 mSDsCounter, 0 mSdLazyCounter, 3272 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 365 SdHoareTripleChecker+Valid, 2339 SdHoareTripleChecker+Invalid, 3352 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 3272 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-02-15 14:48:31,120 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [365 Valid, 2339 Invalid, 3352 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 3272 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-02-15 14:48:31,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12687 states. [2022-02-15 14:48:31,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12687 to 7194. [2022-02-15 14:48:31,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7194 states, 7193 states have (on average 3.031558459613513) internal successors, (21806), 7193 states have internal predecessors, (21806), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:48:31,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7194 states to 7194 states and 21806 transitions. [2022-02-15 14:48:31,252 INFO L78 Accepts]: Start accepts. Automaton has 7194 states and 21806 transitions. Word has length 48 [2022-02-15 14:48:31,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:48:31,252 INFO L470 AbstractCegarLoop]: Abstraction has 7194 states and 21806 transitions. [2022-02-15 14:48:31,252 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 2.169811320754717) internal successors, (115), 52 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:48:31,252 INFO L276 IsEmpty]: Start isEmpty. Operand 7194 states and 21806 transitions. [2022-02-15 14:48:31,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-02-15 14:48:31,260 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:48:31,261 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:48:31,278 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (150)] Forceful destruction successful, exit code 0 [2022-02-15 14:48:31,461 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152,150 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:48:31,461 INFO L402 AbstractCegarLoop]: === Iteration 154 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 14:48:31,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:48:31,461 INFO L85 PathProgramCache]: Analyzing trace with hash -1667383773, now seen corresponding path program 62 times [2022-02-15 14:48:31,461 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:48:31,461 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1221351496] [2022-02-15 14:48:31,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:48:31,462 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:48:31,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:48:31,999 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:48:31,999 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:48:31,999 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1221351496] [2022-02-15 14:48:31,999 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1221351496] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:48:31,999 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1969094145] [2022-02-15 14:48:31,999 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-15 14:48:31,999 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:48:31,999 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:48:32,000 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) [2022-02-15 14:48:32,002 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (151)] Waiting until timeout for monitored process [2022-02-15 14:48:32,030 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-15 14:48:32,030 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:48:32,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2022-02-15 14:48:32,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:48:32,226 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 15 treesize of output 7 [2022-02-15 14:48:32,418 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-02-15 14:48:33,023 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:48:33,024 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:48:33,713 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:48:33,714 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 34 treesize of output 36 [2022-02-15 14:48:33,842 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:48:33,842 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 37 treesize of output 39 [2022-02-15 14:48:34,069 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:48:34,069 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1969094145] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:48:34,069 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:48:34,070 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20, 20] total 52 [2022-02-15 14:48:34,070 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1222083154] [2022-02-15 14:48:34,070 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:48:34,070 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-02-15 14:48:34,070 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:48:34,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-02-15 14:48:34,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=208, Invalid=2548, Unknown=0, NotChecked=0, Total=2756 [2022-02-15 14:48:34,071 INFO L87 Difference]: Start difference. First operand 7194 states and 21806 transitions. Second operand has 53 states, 53 states have (on average 2.169811320754717) internal successors, (115), 52 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:48:36,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:48:36,879 INFO L93 Difference]: Finished difference Result 15342 states and 45924 transitions. [2022-02-15 14:48:36,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-02-15 14:48:36,880 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 2.169811320754717) internal successors, (115), 52 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2022-02-15 14:48:36,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:48:36,907 INFO L225 Difference]: With dead ends: 15342 [2022-02-15 14:48:36,907 INFO L226 Difference]: Without dead ends: 15297 [2022-02-15 14:48:36,908 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 54 SyntacticMatches, 11 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1784 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=447, Invalid=5559, Unknown=0, NotChecked=0, Total=6006 [2022-02-15 14:48:36,908 INFO L933 BasicCegarLoop]: 110 mSDtfsCounter, 260 mSDsluCounter, 4063 mSDsCounter, 0 mSdLazyCounter, 4406 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 260 SdHoareTripleChecker+Valid, 3064 SdHoareTripleChecker+Invalid, 4469 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 4406 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-02-15 14:48:36,908 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [260 Valid, 3064 Invalid, 4469 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 4406 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-02-15 14:48:36,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15297 states. [2022-02-15 14:48:37,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15297 to 7188. [2022-02-15 14:48:37,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7188 states, 7187 states have (on average 3.031445665785446) internal successors, (21787), 7187 states have internal predecessors, (21787), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:48:37,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7188 states to 7188 states and 21787 transitions. [2022-02-15 14:48:37,079 INFO L78 Accepts]: Start accepts. Automaton has 7188 states and 21787 transitions. Word has length 48 [2022-02-15 14:48:37,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:48:37,079 INFO L470 AbstractCegarLoop]: Abstraction has 7188 states and 21787 transitions. [2022-02-15 14:48:37,079 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 2.169811320754717) internal successors, (115), 52 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:48:37,079 INFO L276 IsEmpty]: Start isEmpty. Operand 7188 states and 21787 transitions. [2022-02-15 14:48:37,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-02-15 14:48:37,088 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:48:37,088 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:48:37,104 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (151)] Forceful destruction successful, exit code 0 [2022-02-15 14:48:37,289 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153,151 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:48:37,289 INFO L402 AbstractCegarLoop]: === Iteration 155 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 14:48:37,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:48:37,289 INFO L85 PathProgramCache]: Analyzing trace with hash 1680851723, now seen corresponding path program 63 times [2022-02-15 14:48:37,289 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:48:37,289 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2108193622] [2022-02-15 14:48:37,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:48:37,290 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:48:37,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:48:37,799 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:48:37,800 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:48:37,800 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2108193622] [2022-02-15 14:48:37,800 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2108193622] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:48:37,800 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [78037629] [2022-02-15 14:48:37,800 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-15 14:48:37,800 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:48:37,800 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:48:37,801 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) [2022-02-15 14:48:37,801 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (152)] Waiting until timeout for monitored process [2022-02-15 14:48:37,828 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-15 14:48:37,828 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:48:37,829 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2022-02-15 14:48:37,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:48:38,018 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-02-15 14:48:38,205 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-02-15 14:48:38,710 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:48:38,710 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:48:39,455 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:48:39,455 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 36 [2022-02-15 14:48:39,575 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:48:39,576 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 39 [2022-02-15 14:48:39,806 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:48:39,806 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [78037629] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:48:39,806 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:48:39,806 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20, 20] total 53 [2022-02-15 14:48:39,806 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1602264703] [2022-02-15 14:48:39,807 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:48:39,807 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2022-02-15 14:48:39,807 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:48:39,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2022-02-15 14:48:39,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=213, Invalid=2649, Unknown=0, NotChecked=0, Total=2862 [2022-02-15 14:48:39,807 INFO L87 Difference]: Start difference. First operand 7188 states and 21787 transitions. Second operand has 54 states, 54 states have (on average 2.1481481481481484) internal successors, (116), 53 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:48:41,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:48:41,473 INFO L93 Difference]: Finished difference Result 12412 states and 37319 transitions. [2022-02-15 14:48:41,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-02-15 14:48:41,473 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 2.1481481481481484) internal successors, (116), 53 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2022-02-15 14:48:41,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:48:41,495 INFO L225 Difference]: With dead ends: 12412 [2022-02-15 14:48:41,495 INFO L226 Difference]: Without dead ends: 12404 [2022-02-15 14:48:41,496 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 59 SyntacticMatches, 6 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1278 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=321, Invalid=3839, Unknown=0, NotChecked=0, Total=4160 [2022-02-15 14:48:41,496 INFO L933 BasicCegarLoop]: 116 mSDtfsCounter, 344 mSDsluCounter, 3072 mSDsCounter, 0 mSdLazyCounter, 2677 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 344 SdHoareTripleChecker+Valid, 2457 SdHoareTripleChecker+Invalid, 2844 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 2677 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 111 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-02-15 14:48:41,496 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [344 Valid, 2457 Invalid, 2844 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 2677 Invalid, 0 Unknown, 111 Unchecked, 1.0s Time] [2022-02-15 14:48:41,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12404 states. [2022-02-15 14:48:41,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12404 to 7208. [2022-02-15 14:48:41,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7208 states, 7207 states have (on average 3.029554599694741) internal successors, (21834), 7207 states have internal predecessors, (21834), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:48:41,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7208 states to 7208 states and 21834 transitions. [2022-02-15 14:48:41,639 INFO L78 Accepts]: Start accepts. Automaton has 7208 states and 21834 transitions. Word has length 48 [2022-02-15 14:48:41,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:48:41,640 INFO L470 AbstractCegarLoop]: Abstraction has 7208 states and 21834 transitions. [2022-02-15 14:48:41,640 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 2.1481481481481484) internal successors, (116), 53 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:48:41,640 INFO L276 IsEmpty]: Start isEmpty. Operand 7208 states and 21834 transitions. [2022-02-15 14:48:41,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-02-15 14:48:41,649 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:48:41,649 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:48:41,664 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (152)] Forceful destruction successful, exit code 0 [2022-02-15 14:48:41,849 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154,152 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:48:41,849 INFO L402 AbstractCegarLoop]: === Iteration 156 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 14:48:41,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:48:41,850 INFO L85 PathProgramCache]: Analyzing trace with hash 1310847503, now seen corresponding path program 64 times [2022-02-15 14:48:41,850 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:48:41,850 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [553522753] [2022-02-15 14:48:41,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:48:41,850 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:48:41,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:48:42,367 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:48:42,367 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:48:42,367 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [553522753] [2022-02-15 14:48:42,367 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [553522753] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:48:42,367 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [708955898] [2022-02-15 14:48:42,367 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-15 14:48:42,367 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:48:42,368 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:48:42,368 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) [2022-02-15 14:48:42,369 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (153)] Waiting until timeout for monitored process [2022-02-15 14:48:42,395 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-15 14:48:42,395 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:48:42,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2022-02-15 14:48:42,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:48:42,586 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 15 treesize of output 7 [2022-02-15 14:48:42,778 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-02-15 14:48:43,344 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:48:43,345 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:48:44,105 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:48:44,105 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 34 treesize of output 36 [2022-02-15 14:48:44,236 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:48:44,237 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 39 [2022-02-15 14:48:44,454 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:48:44,454 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [708955898] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:48:44,454 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:48:44,454 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20, 20] total 53 [2022-02-15 14:48:44,455 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048269484] [2022-02-15 14:48:44,455 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:48:44,455 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2022-02-15 14:48:44,455 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:48:44,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2022-02-15 14:48:44,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=213, Invalid=2649, Unknown=0, NotChecked=0, Total=2862 [2022-02-15 14:48:44,455 INFO L87 Difference]: Start difference. First operand 7208 states and 21834 transitions. Second operand has 54 states, 54 states have (on average 2.1481481481481484) internal successors, (116), 53 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:48:47,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:48:47,210 INFO L93 Difference]: Finished difference Result 15556 states and 46360 transitions. [2022-02-15 14:48:47,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-02-15 14:48:47,210 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 2.1481481481481484) internal successors, (116), 53 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2022-02-15 14:48:47,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:48:47,239 INFO L225 Difference]: With dead ends: 15556 [2022-02-15 14:48:47,239 INFO L226 Difference]: Without dead ends: 15497 [2022-02-15 14:48:47,239 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 55 SyntacticMatches, 9 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1958 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=509, Invalid=6297, Unknown=0, NotChecked=0, Total=6806 [2022-02-15 14:48:47,240 INFO L933 BasicCegarLoop]: 123 mSDtfsCounter, 364 mSDsluCounter, 3701 mSDsCounter, 0 mSdLazyCounter, 3498 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 364 SdHoareTripleChecker+Valid, 2855 SdHoareTripleChecker+Invalid, 3947 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 3498 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 368 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-02-15 14:48:47,240 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [364 Valid, 2855 Invalid, 3947 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 3498 Invalid, 0 Unknown, 368 Unchecked, 1.3s Time] [2022-02-15 14:48:47,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15497 states. [2022-02-15 14:48:47,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15497 to 7226. [2022-02-15 14:48:47,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7226 states, 7225 states have (on average 3.027681660899654) internal successors, (21875), 7225 states have internal predecessors, (21875), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:48:47,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7226 states to 7226 states and 21875 transitions. [2022-02-15 14:48:47,405 INFO L78 Accepts]: Start accepts. Automaton has 7226 states and 21875 transitions. Word has length 48 [2022-02-15 14:48:47,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:48:47,405 INFO L470 AbstractCegarLoop]: Abstraction has 7226 states and 21875 transitions. [2022-02-15 14:48:47,406 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 2.1481481481481484) internal successors, (116), 53 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:48:47,406 INFO L276 IsEmpty]: Start isEmpty. Operand 7226 states and 21875 transitions. [2022-02-15 14:48:47,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-02-15 14:48:47,415 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:48:47,415 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:48:47,431 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (153)] Ended with exit code 0 [2022-02-15 14:48:47,615 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 153 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable155 [2022-02-15 14:48:47,615 INFO L402 AbstractCegarLoop]: === Iteration 157 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 14:48:47,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:48:47,616 INFO L85 PathProgramCache]: Analyzing trace with hash 1526414205, now seen corresponding path program 65 times [2022-02-15 14:48:47,616 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:48:47,616 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [556105004] [2022-02-15 14:48:47,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:48:47,616 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:48:47,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:48:48,150 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:48:48,151 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:48:48,151 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [556105004] [2022-02-15 14:48:48,151 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [556105004] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:48:48,151 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [840508557] [2022-02-15 14:48:48,151 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-15 14:48:48,151 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:48:48,151 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:48:48,152 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) [2022-02-15 14:48:48,152 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (154)] Waiting until timeout for monitored process [2022-02-15 14:48:48,179 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-15 14:48:48,179 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:48:48,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2022-02-15 14:48:48,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:48:48,369 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-02-15 14:48:48,557 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-02-15 14:48:49,107 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:48:49,107 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:48:49,823 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:48:49,823 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 36 [2022-02-15 14:48:49,944 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:48:49,945 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 39 [2022-02-15 14:48:50,166 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:48:50,166 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [840508557] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:48:50,167 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:48:50,167 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20, 20] total 53 [2022-02-15 14:48:50,167 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1177025983] [2022-02-15 14:48:50,167 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:48:50,167 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2022-02-15 14:48:50,167 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:48:50,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2022-02-15 14:48:50,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=217, Invalid=2645, Unknown=0, NotChecked=0, Total=2862 [2022-02-15 14:48:50,168 INFO L87 Difference]: Start difference. First operand 7226 states and 21875 transitions. Second operand has 54 states, 54 states have (on average 2.1481481481481484) internal successors, (116), 53 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:48:52,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:48:52,846 INFO L93 Difference]: Finished difference Result 15514 states and 46303 transitions. [2022-02-15 14:48:52,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-02-15 14:48:52,846 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 2.1481481481481484) internal successors, (116), 53 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2022-02-15 14:48:52,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:48:52,873 INFO L225 Difference]: With dead ends: 15514 [2022-02-15 14:48:52,874 INFO L226 Difference]: Without dead ends: 15341 [2022-02-15 14:48:52,874 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 56 SyntacticMatches, 8 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1850 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=479, Invalid=5841, Unknown=0, NotChecked=0, Total=6320 [2022-02-15 14:48:52,874 INFO L933 BasicCegarLoop]: 121 mSDtfsCounter, 368 mSDsluCounter, 4058 mSDsCounter, 0 mSdLazyCounter, 3793 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 368 SdHoareTripleChecker+Valid, 3053 SdHoareTripleChecker+Invalid, 4233 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 3793 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 360 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-02-15 14:48:52,874 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [368 Valid, 3053 Invalid, 4233 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 3793 Invalid, 0 Unknown, 360 Unchecked, 1.4s Time] [2022-02-15 14:48:52,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15341 states. [2022-02-15 14:48:53,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15341 to 7204. [2022-02-15 14:48:53,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7204 states, 7203 states have (on average 3.0284603637373317) internal successors, (21814), 7203 states have internal predecessors, (21814), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:48:53,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7204 states to 7204 states and 21814 transitions. [2022-02-15 14:48:53,036 INFO L78 Accepts]: Start accepts. Automaton has 7204 states and 21814 transitions. Word has length 48 [2022-02-15 14:48:53,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:48:53,036 INFO L470 AbstractCegarLoop]: Abstraction has 7204 states and 21814 transitions. [2022-02-15 14:48:53,036 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 2.1481481481481484) internal successors, (116), 53 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:48:53,036 INFO L276 IsEmpty]: Start isEmpty. Operand 7204 states and 21814 transitions. [2022-02-15 14:48:53,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-02-15 14:48:53,045 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:48:53,045 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:48:53,060 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (154)] Forceful destruction successful, exit code 0 [2022-02-15 14:48:53,246 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 154 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable156 [2022-02-15 14:48:53,246 INFO L402 AbstractCegarLoop]: === Iteration 158 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 14:48:53,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:48:53,246 INFO L85 PathProgramCache]: Analyzing trace with hash 442393127, now seen corresponding path program 66 times [2022-02-15 14:48:53,246 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:48:53,246 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1450960062] [2022-02-15 14:48:53,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:48:53,246 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:48:53,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:48:53,802 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:48:53,802 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:48:53,802 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1450960062] [2022-02-15 14:48:53,802 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1450960062] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:48:53,802 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [685908243] [2022-02-15 14:48:53,802 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-15 14:48:53,802 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:48:53,802 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:48:53,803 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) [2022-02-15 14:48:53,804 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (155)] Waiting until timeout for monitored process [2022-02-15 14:48:53,830 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-15 14:48:53,830 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:48:53,831 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2022-02-15 14:48:53,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:48:54,021 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-02-15 14:48:54,206 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-02-15 14:48:54,790 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:48:54,791 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:48:55,528 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:48:55,528 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 34 treesize of output 36 [2022-02-15 14:48:55,654 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:48:55,654 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 39 [2022-02-15 14:48:55,886 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:48:55,886 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [685908243] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:48:55,886 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:48:55,887 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20, 20] total 53 [2022-02-15 14:48:55,887 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618309955] [2022-02-15 14:48:55,887 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:48:55,887 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2022-02-15 14:48:55,887 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:48:55,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2022-02-15 14:48:55,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=213, Invalid=2649, Unknown=0, NotChecked=0, Total=2862 [2022-02-15 14:48:55,888 INFO L87 Difference]: Start difference. First operand 7204 states and 21814 transitions. Second operand has 54 states, 54 states have (on average 2.1481481481481484) internal successors, (116), 53 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:48:58,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:48:58,586 INFO L93 Difference]: Finished difference Result 15438 states and 46105 transitions. [2022-02-15 14:48:58,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-02-15 14:48:58,586 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 2.1481481481481484) internal successors, (116), 53 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2022-02-15 14:48:58,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:48:58,616 INFO L225 Difference]: With dead ends: 15438 [2022-02-15 14:48:58,616 INFO L226 Difference]: Without dead ends: 15297 [2022-02-15 14:48:58,617 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 54 SyntacticMatches, 10 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1864 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=475, Invalid=5845, Unknown=0, NotChecked=0, Total=6320 [2022-02-15 14:48:58,617 INFO L933 BasicCegarLoop]: 124 mSDtfsCounter, 343 mSDsluCounter, 3864 mSDsCounter, 0 mSdLazyCounter, 3866 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 343 SdHoareTripleChecker+Valid, 2972 SdHoareTripleChecker+Invalid, 3943 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 3866 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-02-15 14:48:58,617 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [343 Valid, 2972 Invalid, 3943 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 3866 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-02-15 14:48:58,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15297 states. [2022-02-15 14:48:58,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15297 to 7128. [2022-02-15 14:48:58,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7128 states, 7127 states have (on average 3.0350778728777885) internal successors, (21631), 7127 states have internal predecessors, (21631), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:48:58,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7128 states to 7128 states and 21631 transitions. [2022-02-15 14:48:58,802 INFO L78 Accepts]: Start accepts. Automaton has 7128 states and 21631 transitions. Word has length 48 [2022-02-15 14:48:58,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:48:58,802 INFO L470 AbstractCegarLoop]: Abstraction has 7128 states and 21631 transitions. [2022-02-15 14:48:58,802 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 2.1481481481481484) internal successors, (116), 53 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:48:58,802 INFO L276 IsEmpty]: Start isEmpty. Operand 7128 states and 21631 transitions. [2022-02-15 14:48:58,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-02-15 14:48:58,812 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:48:58,812 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:48:58,828 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (155)] Ended with exit code 0 [2022-02-15 14:48:59,012 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable157,155 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:48:59,012 INFO L402 AbstractCegarLoop]: === Iteration 159 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 14:48:59,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:48:59,013 INFO L85 PathProgramCache]: Analyzing trace with hash -873155629, now seen corresponding path program 67 times [2022-02-15 14:48:59,013 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:48:59,013 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1157667380] [2022-02-15 14:48:59,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:48:59,013 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:48:59,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:48:59,536 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:48:59,536 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:48:59,536 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1157667380] [2022-02-15 14:48:59,537 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1157667380] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:48:59,537 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2044101578] [2022-02-15 14:48:59,537 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-15 14:48:59,537 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:48:59,537 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:48:59,538 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) [2022-02-15 14:48:59,538 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (156)] Waiting until timeout for monitored process [2022-02-15 14:48:59,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:48:59,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2022-02-15 14:48:59,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:48:59,763 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 15 treesize of output 7 [2022-02-15 14:48:59,957 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 15 treesize of output 7 [2022-02-15 14:49:00,581 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:49:00,581 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:49:01,317 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:49:01,317 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 36 [2022-02-15 14:49:01,443 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:49:01,443 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 39 [2022-02-15 14:49:01,680 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:49:01,680 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2044101578] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:49:01,680 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:49:01,680 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20, 20] total 52 [2022-02-15 14:49:01,680 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1159914808] [2022-02-15 14:49:01,680 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:49:01,680 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-02-15 14:49:01,680 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:49:01,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-02-15 14:49:01,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=204, Invalid=2552, Unknown=0, NotChecked=0, Total=2756 [2022-02-15 14:49:01,681 INFO L87 Difference]: Start difference. First operand 7128 states and 21631 transitions. Second operand has 53 states, 53 states have (on average 2.169811320754717) internal successors, (115), 52 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:49:04,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:49:04,077 INFO L93 Difference]: Finished difference Result 12635 states and 38136 transitions. [2022-02-15 14:49:04,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-02-15 14:49:04,077 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 2.169811320754717) internal successors, (115), 52 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2022-02-15 14:49:04,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:49:04,096 INFO L225 Difference]: With dead ends: 12635 [2022-02-15 14:49:04,096 INFO L226 Difference]: Without dead ends: 12600 [2022-02-15 14:49:04,097 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 55 SyntacticMatches, 10 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1674 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=464, Invalid=5388, Unknown=0, NotChecked=0, Total=5852 [2022-02-15 14:49:04,097 INFO L933 BasicCegarLoop]: 103 mSDtfsCounter, 325 mSDsluCounter, 2634 mSDsCounter, 0 mSdLazyCounter, 2881 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 325 SdHoareTripleChecker+Valid, 2154 SdHoareTripleChecker+Invalid, 2962 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 2881 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-02-15 14:49:04,097 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [325 Valid, 2154 Invalid, 2962 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 2881 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-02-15 14:49:04,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12600 states. [2022-02-15 14:49:04,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12600 to 7136. [2022-02-15 14:49:04,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7136 states, 7135 states have (on average 3.0343377715487034) internal successors, (21650), 7135 states have internal predecessors, (21650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:49:04,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7136 states to 7136 states and 21650 transitions. [2022-02-15 14:49:04,217 INFO L78 Accepts]: Start accepts. Automaton has 7136 states and 21650 transitions. Word has length 48 [2022-02-15 14:49:04,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:49:04,217 INFO L470 AbstractCegarLoop]: Abstraction has 7136 states and 21650 transitions. [2022-02-15 14:49:04,217 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 2.169811320754717) internal successors, (115), 52 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:49:04,217 INFO L276 IsEmpty]: Start isEmpty. Operand 7136 states and 21650 transitions. [2022-02-15 14:49:04,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-02-15 14:49:04,225 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:49:04,225 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:49:04,241 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (156)] Forceful destruction successful, exit code 0 [2022-02-15 14:49:04,425 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 156 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable158 [2022-02-15 14:49:04,425 INFO L402 AbstractCegarLoop]: === Iteration 160 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 14:49:04,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:49:04,426 INFO L85 PathProgramCache]: Analyzing trace with hash 3026835, now seen corresponding path program 68 times [2022-02-15 14:49:04,426 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:49:04,426 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1545265548] [2022-02-15 14:49:04,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:49:04,426 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:49:04,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:49:04,941 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:49:04,941 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:49:04,941 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1545265548] [2022-02-15 14:49:04,941 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1545265548] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:49:04,941 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [548890586] [2022-02-15 14:49:04,941 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-15 14:49:04,941 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:49:04,941 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:49:04,942 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) [2022-02-15 14:49:04,943 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (157)] Waiting until timeout for monitored process [2022-02-15 14:49:04,975 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-15 14:49:04,976 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:49:04,976 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2022-02-15 14:49:04,977 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:49:05,165 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-02-15 14:49:05,352 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-02-15 14:49:05,919 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:49:05,919 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:49:06,618 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:49:06,618 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 36 [2022-02-15 14:49:06,738 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:49:06,739 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 37 treesize of output 39 [2022-02-15 14:49:06,962 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:49:06,962 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [548890586] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:49:06,962 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:49:06,963 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20, 20] total 52 [2022-02-15 14:49:06,963 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849591242] [2022-02-15 14:49:06,963 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:49:06,963 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-02-15 14:49:06,963 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:49:06,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-02-15 14:49:06,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=204, Invalid=2552, Unknown=0, NotChecked=0, Total=2756 [2022-02-15 14:49:06,963 INFO L87 Difference]: Start difference. First operand 7136 states and 21650 transitions. Second operand has 53 states, 53 states have (on average 2.169811320754717) internal successors, (115), 52 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:49:09,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:49:09,518 INFO L93 Difference]: Finished difference Result 12666 states and 38195 transitions. [2022-02-15 14:49:09,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-02-15 14:49:09,519 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 2.169811320754717) internal successors, (115), 52 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2022-02-15 14:49:09,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:49:09,539 INFO L225 Difference]: With dead ends: 12666 [2022-02-15 14:49:09,540 INFO L226 Difference]: Without dead ends: 12622 [2022-02-15 14:49:09,540 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 58 SyntacticMatches, 7 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1530 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=477, Invalid=5223, Unknown=0, NotChecked=0, Total=5700 [2022-02-15 14:49:09,540 INFO L933 BasicCegarLoop]: 105 mSDtfsCounter, 347 mSDsluCounter, 3160 mSDsCounter, 0 mSdLazyCounter, 3443 mSolverCounterSat, 101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 347 SdHoareTripleChecker+Valid, 2563 SdHoareTripleChecker+Invalid, 3626 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 3443 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 82 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-02-15 14:49:09,540 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [347 Valid, 2563 Invalid, 3626 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 3443 Invalid, 0 Unknown, 82 Unchecked, 1.2s Time] [2022-02-15 14:49:09,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12622 states. [2022-02-15 14:49:09,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12622 to 7132. [2022-02-15 14:49:09,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7132 states, 7131 states have (on average 3.0349179638199413) internal successors, (21642), 7131 states have internal predecessors, (21642), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:49:09,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7132 states to 7132 states and 21642 transitions. [2022-02-15 14:49:09,664 INFO L78 Accepts]: Start accepts. Automaton has 7132 states and 21642 transitions. Word has length 48 [2022-02-15 14:49:09,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:49:09,664 INFO L470 AbstractCegarLoop]: Abstraction has 7132 states and 21642 transitions. [2022-02-15 14:49:09,664 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 2.169811320754717) internal successors, (115), 52 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:49:09,664 INFO L276 IsEmpty]: Start isEmpty. Operand 7132 states and 21642 transitions. [2022-02-15 14:49:09,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-02-15 14:49:09,672 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:49:09,672 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:49:09,688 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (157)] Forceful destruction successful, exit code 0 [2022-02-15 14:49:09,872 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 157 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable159 [2022-02-15 14:49:09,872 INFO L402 AbstractCegarLoop]: === Iteration 161 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 14:49:09,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:49:09,873 INFO L85 PathProgramCache]: Analyzing trace with hash -2100109293, now seen corresponding path program 69 times [2022-02-15 14:49:09,873 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:49:09,873 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1766322106] [2022-02-15 14:49:09,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:49:09,873 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:49:09,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:49:10,377 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:49:10,377 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:49:10,377 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1766322106] [2022-02-15 14:49:10,377 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1766322106] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:49:10,377 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1584062905] [2022-02-15 14:49:10,377 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-15 14:49:10,377 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:49:10,378 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:49:10,379 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) [2022-02-15 14:49:10,380 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (158)] Waiting until timeout for monitored process [2022-02-15 14:49:10,405 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-15 14:49:10,406 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:49:10,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2022-02-15 14:49:10,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:49:10,623 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-02-15 14:49:10,829 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 11 treesize of output 7 [2022-02-15 14:49:11,301 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:49:11,301 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:49:11,974 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:49:11,974 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 36 [2022-02-15 14:49:12,116 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:49:12,116 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 39 [2022-02-15 14:49:12,359 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:49:12,359 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1584062905] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:49:12,359 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:49:12,359 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20, 20] total 52 [2022-02-15 14:49:12,359 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1390076578] [2022-02-15 14:49:12,359 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:49:12,359 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-02-15 14:49:12,359 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:49:12,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-02-15 14:49:12,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=208, Invalid=2548, Unknown=0, NotChecked=0, Total=2756 [2022-02-15 14:49:12,360 INFO L87 Difference]: Start difference. First operand 7132 states and 21642 transitions. Second operand has 53 states, 53 states have (on average 2.169811320754717) internal successors, (115), 52 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:49:14,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:49:14,835 INFO L93 Difference]: Finished difference Result 15280 states and 45762 transitions. [2022-02-15 14:49:14,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-02-15 14:49:14,836 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 2.169811320754717) internal successors, (115), 52 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2022-02-15 14:49:14,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:49:14,862 INFO L225 Difference]: With dead ends: 15280 [2022-02-15 14:49:14,862 INFO L226 Difference]: Without dead ends: 15245 [2022-02-15 14:49:14,862 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 59 SyntacticMatches, 6 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1571 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=432, Invalid=5268, Unknown=0, NotChecked=0, Total=5700 [2022-02-15 14:49:14,862 INFO L933 BasicCegarLoop]: 106 mSDtfsCounter, 241 mSDsluCounter, 3639 mSDsCounter, 0 mSdLazyCounter, 3887 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 241 SdHoareTripleChecker+Valid, 2825 SdHoareTripleChecker+Invalid, 3949 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 3887 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-02-15 14:49:14,862 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [241 Valid, 2825 Invalid, 3949 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 3887 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-02-15 14:49:14,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15245 states. [2022-02-15 14:49:14,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15245 to 7136. [2022-02-15 14:49:15,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7136 states, 7135 states have (on average 3.0343377715487034) internal successors, (21650), 7135 states have internal predecessors, (21650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:49:15,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7136 states to 7136 states and 21650 transitions. [2022-02-15 14:49:15,014 INFO L78 Accepts]: Start accepts. Automaton has 7136 states and 21650 transitions. Word has length 48 [2022-02-15 14:49:15,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:49:15,015 INFO L470 AbstractCegarLoop]: Abstraction has 7136 states and 21650 transitions. [2022-02-15 14:49:15,015 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 2.169811320754717) internal successors, (115), 52 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:49:15,015 INFO L276 IsEmpty]: Start isEmpty. Operand 7136 states and 21650 transitions. [2022-02-15 14:49:15,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-02-15 14:49:15,023 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:49:15,023 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:49:15,038 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (158)] Forceful destruction successful, exit code 0 [2022-02-15 14:49:15,223 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,SelfDestructingSolverStorable160 [2022-02-15 14:49:15,223 INFO L402 AbstractCegarLoop]: === Iteration 162 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 14:49:15,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:49:15,224 INFO L85 PathProgramCache]: Analyzing trace with hash 361940599, now seen corresponding path program 70 times [2022-02-15 14:49:15,224 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:49:15,224 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1845396654] [2022-02-15 14:49:15,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:49:15,224 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:49:15,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:49:15,744 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:49:15,744 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:49:15,744 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1845396654] [2022-02-15 14:49:15,744 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1845396654] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:49:15,744 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1335099988] [2022-02-15 14:49:15,744 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-15 14:49:15,744 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:49:15,744 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:49:15,745 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) [2022-02-15 14:49:15,745 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (159)] Waiting until timeout for monitored process [2022-02-15 14:49:15,771 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-15 14:49:15,771 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:49:15,772 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2022-02-15 14:49:15,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:49:15,968 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-02-15 14:49:16,162 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 15 treesize of output 7 [2022-02-15 14:49:16,772 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:49:16,772 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:49:17,471 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:49:17,471 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 36 [2022-02-15 14:49:17,596 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:49:17,596 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 39 [2022-02-15 14:49:17,835 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:49:17,835 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1335099988] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:49:17,835 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:49:17,835 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20, 20] total 52 [2022-02-15 14:49:17,835 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1139592219] [2022-02-15 14:49:17,835 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:49:17,836 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-02-15 14:49:17,836 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:49:17,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-02-15 14:49:17,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=208, Invalid=2548, Unknown=0, NotChecked=0, Total=2756 [2022-02-15 14:49:17,836 INFO L87 Difference]: Start difference. First operand 7136 states and 21650 transitions. Second operand has 53 states, 53 states have (on average 2.169811320754717) internal successors, (115), 52 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:49:20,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:49:20,301 INFO L93 Difference]: Finished difference Result 15284 states and 45768 transitions. [2022-02-15 14:49:20,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-02-15 14:49:20,301 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 2.169811320754717) internal successors, (115), 52 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2022-02-15 14:49:20,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:49:20,327 INFO L225 Difference]: With dead ends: 15284 [2022-02-15 14:49:20,327 INFO L226 Difference]: Without dead ends: 15241 [2022-02-15 14:49:20,328 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 52 SyntacticMatches, 13 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1760 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=432, Invalid=5268, Unknown=0, NotChecked=0, Total=5700 [2022-02-15 14:49:20,328 INFO L933 BasicCegarLoop]: 105 mSDtfsCounter, 258 mSDsluCounter, 3408 mSDsCounter, 0 mSdLazyCounter, 3785 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 258 SdHoareTripleChecker+Valid, 2651 SdHoareTripleChecker+Invalid, 3848 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 3785 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-02-15 14:49:20,328 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [258 Valid, 2651 Invalid, 3848 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 3785 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-02-15 14:49:20,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15241 states. [2022-02-15 14:49:20,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15241 to 7132. [2022-02-15 14:49:20,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7132 states, 7131 states have (on average 3.0346374982470903) internal successors, (21640), 7131 states have internal predecessors, (21640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:49:20,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7132 states to 7132 states and 21640 transitions. [2022-02-15 14:49:20,495 INFO L78 Accepts]: Start accepts. Automaton has 7132 states and 21640 transitions. Word has length 48 [2022-02-15 14:49:20,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:49:20,495 INFO L470 AbstractCegarLoop]: Abstraction has 7132 states and 21640 transitions. [2022-02-15 14:49:20,495 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 2.169811320754717) internal successors, (115), 52 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:49:20,495 INFO L276 IsEmpty]: Start isEmpty. Operand 7132 states and 21640 transitions. [2022-02-15 14:49:20,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-02-15 14:49:20,504 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:49:20,504 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:49:20,519 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (159)] Forceful destruction successful, exit code 0 [2022-02-15 14:49:20,707 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable161,159 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:49:20,707 INFO L402 AbstractCegarLoop]: === Iteration 163 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 14:49:20,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:49:20,707 INFO L85 PathProgramCache]: Analyzing trace with hash -494007049, now seen corresponding path program 71 times [2022-02-15 14:49:20,708 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:49:20,708 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1998093914] [2022-02-15 14:49:20,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:49:20,708 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:49:20,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:49:21,222 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:49:21,223 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:49:21,223 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1998093914] [2022-02-15 14:49:21,223 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1998093914] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:49:21,223 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [681213816] [2022-02-15 14:49:21,223 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-15 14:49:21,223 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:49:21,223 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:49:21,224 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) [2022-02-15 14:49:21,224 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (160)] Waiting until timeout for monitored process [2022-02-15 14:49:21,252 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-15 14:49:21,252 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:49:21,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2022-02-15 14:49:21,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:49:21,452 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-02-15 14:49:21,641 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 11 treesize of output 7 [2022-02-15 14:49:22,191 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:49:22,191 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:49:22,946 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:49:22,947 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 36 [2022-02-15 14:49:23,069 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:49:23,069 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 37 treesize of output 39 [2022-02-15 14:49:23,286 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:49:23,286 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [681213816] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:49:23,286 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:49:23,286 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20, 20] total 52 [2022-02-15 14:49:23,286 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1654652143] [2022-02-15 14:49:23,286 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:49:23,287 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-02-15 14:49:23,287 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:49:23,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-02-15 14:49:23,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=204, Invalid=2552, Unknown=0, NotChecked=0, Total=2756 [2022-02-15 14:49:23,287 INFO L87 Difference]: Start difference. First operand 7132 states and 21640 transitions. Second operand has 53 states, 53 states have (on average 2.169811320754717) internal successors, (115), 52 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:49:25,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:49:25,708 INFO L93 Difference]: Finished difference Result 12668 states and 38199 transitions. [2022-02-15 14:49:25,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-02-15 14:49:25,708 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 2.169811320754717) internal successors, (115), 52 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2022-02-15 14:49:25,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:49:25,727 INFO L225 Difference]: With dead ends: 12668 [2022-02-15 14:49:25,727 INFO L226 Difference]: Without dead ends: 12628 [2022-02-15 14:49:25,727 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 57 SyntacticMatches, 8 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1553 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=477, Invalid=5223, Unknown=0, NotChecked=0, Total=5700 [2022-02-15 14:49:25,727 INFO L933 BasicCegarLoop]: 103 mSDtfsCounter, 357 mSDsluCounter, 2771 mSDsCounter, 0 mSdLazyCounter, 2958 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 357 SdHoareTripleChecker+Valid, 2239 SdHoareTripleChecker+Invalid, 3159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 2958 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 102 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-02-15 14:49:25,727 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [357 Valid, 2239 Invalid, 3159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 2958 Invalid, 0 Unknown, 102 Unchecked, 1.1s Time] [2022-02-15 14:49:25,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12628 states. [2022-02-15 14:49:25,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12628 to 7138. [2022-02-15 14:49:25,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7138 states, 7137 states have (on average 3.0339078043996075) internal successors, (21653), 7137 states have internal predecessors, (21653), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:49:25,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7138 states to 7138 states and 21653 transitions. [2022-02-15 14:49:25,841 INFO L78 Accepts]: Start accepts. Automaton has 7138 states and 21653 transitions. Word has length 48 [2022-02-15 14:49:25,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:49:25,841 INFO L470 AbstractCegarLoop]: Abstraction has 7138 states and 21653 transitions. [2022-02-15 14:49:25,841 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 2.169811320754717) internal successors, (115), 52 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:49:25,841 INFO L276 IsEmpty]: Start isEmpty. Operand 7138 states and 21653 transitions. [2022-02-15 14:49:25,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-02-15 14:49:25,849 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:49:25,849 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:49:25,865 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (160)] Forceful destruction successful, exit code 0 [2022-02-15 14:49:26,049 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162,160 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:49:26,050 INFO L402 AbstractCegarLoop]: === Iteration 164 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 14:49:26,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:49:26,050 INFO L85 PathProgramCache]: Analyzing trace with hash 2134561661, now seen corresponding path program 72 times [2022-02-15 14:49:26,050 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:49:26,050 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1689616145] [2022-02-15 14:49:26,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:49:26,050 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:49:26,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:49:26,565 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:49:26,565 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:49:26,565 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1689616145] [2022-02-15 14:49:26,565 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1689616145] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:49:26,565 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1262000716] [2022-02-15 14:49:26,565 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-15 14:49:26,565 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:49:26,565 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:49:26,566 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) [2022-02-15 14:49:26,566 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (161)] Waiting until timeout for monitored process [2022-02-15 14:49:26,593 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-15 14:49:26,593 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:49:26,594 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2022-02-15 14:49:26,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:49:26,788 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 11 treesize of output 7 [2022-02-15 14:49:26,979 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 11 treesize of output 7 [2022-02-15 14:49:27,605 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:49:27,605 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:49:28,321 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:49:28,321 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 36 [2022-02-15 14:49:28,444 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:49:28,444 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 39 [2022-02-15 14:49:28,671 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:49:28,671 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1262000716] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:49:28,671 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:49:28,671 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20, 20] total 52 [2022-02-15 14:49:28,671 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1916215610] [2022-02-15 14:49:28,671 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:49:28,672 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-02-15 14:49:28,672 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:49:28,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-02-15 14:49:28,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=204, Invalid=2552, Unknown=0, NotChecked=0, Total=2756 [2022-02-15 14:49:28,672 INFO L87 Difference]: Start difference. First operand 7138 states and 21653 transitions. Second operand has 53 states, 53 states have (on average 2.169811320754717) internal successors, (115), 52 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:49:31,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:49:31,178 INFO L93 Difference]: Finished difference Result 12629 states and 38115 transitions. [2022-02-15 14:49:31,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-02-15 14:49:31,178 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 2.169811320754717) internal successors, (115), 52 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2022-02-15 14:49:31,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:49:31,200 INFO L225 Difference]: With dead ends: 12629 [2022-02-15 14:49:31,200 INFO L226 Difference]: Without dead ends: 12582 [2022-02-15 14:49:31,200 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 53 SyntacticMatches, 12 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1724 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=464, Invalid=5388, Unknown=0, NotChecked=0, Total=5852 [2022-02-15 14:49:31,200 INFO L933 BasicCegarLoop]: 100 mSDtfsCounter, 324 mSDsluCounter, 2891 mSDsCounter, 0 mSdLazyCounter, 3311 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 324 SdHoareTripleChecker+Valid, 2246 SdHoareTripleChecker+Invalid, 3394 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 3311 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-02-15 14:49:31,201 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [324 Valid, 2246 Invalid, 3394 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 3311 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-02-15 14:49:31,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12582 states. [2022-02-15 14:49:31,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12582 to 7130. [2022-02-15 14:49:31,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7130 states, 7129 states have (on average 3.034787487726189) internal successors, (21635), 7129 states have internal predecessors, (21635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:49:31,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7130 states to 7130 states and 21635 transitions. [2022-02-15 14:49:31,329 INFO L78 Accepts]: Start accepts. Automaton has 7130 states and 21635 transitions. Word has length 48 [2022-02-15 14:49:31,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:49:31,329 INFO L470 AbstractCegarLoop]: Abstraction has 7130 states and 21635 transitions. [2022-02-15 14:49:31,329 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 2.169811320754717) internal successors, (115), 52 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:49:31,329 INFO L276 IsEmpty]: Start isEmpty. Operand 7130 states and 21635 transitions. [2022-02-15 14:49:31,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-02-15 14:49:31,337 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:49:31,337 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:49:31,353 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (161)] Forceful destruction successful, exit code 0 [2022-02-15 14:49:31,538 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163,161 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:49:31,538 INFO L402 AbstractCegarLoop]: === Iteration 165 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 14:49:31,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:49:31,538 INFO L85 PathProgramCache]: Analyzing trace with hash 1248400551, now seen corresponding path program 73 times [2022-02-15 14:49:31,538 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:49:31,538 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1794657311] [2022-02-15 14:49:31,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:49:31,538 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:49:31,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:49:32,060 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:49:32,060 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:49:32,060 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1794657311] [2022-02-15 14:49:32,060 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1794657311] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:49:32,060 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1738491033] [2022-02-15 14:49:32,060 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-15 14:49:32,060 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:49:32,060 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:49:32,061 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) [2022-02-15 14:49:32,061 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (162)] Waiting until timeout for monitored process [2022-02-15 14:49:32,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:49:32,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2022-02-15 14:49:32,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:49:32,280 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-02-15 14:49:32,475 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-02-15 14:49:32,974 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:49:32,974 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:49:33,682 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:49:33,682 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 34 treesize of output 36 [2022-02-15 14:49:33,813 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:49:33,813 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 39 [2022-02-15 14:49:34,045 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:49:34,045 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1738491033] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:49:34,045 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:49:34,045 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20, 20] total 53 [2022-02-15 14:49:34,045 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [869071723] [2022-02-15 14:49:34,045 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:49:34,045 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2022-02-15 14:49:34,045 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:49:34,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2022-02-15 14:49:34,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=213, Invalid=2649, Unknown=0, NotChecked=0, Total=2862 [2022-02-15 14:49:34,046 INFO L87 Difference]: Start difference. First operand 7130 states and 21635 transitions. Second operand has 54 states, 54 states have (on average 2.1481481481481484) internal successors, (116), 53 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:49:36,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:49:36,427 INFO L93 Difference]: Finished difference Result 15337 states and 45881 transitions. [2022-02-15 14:49:36,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-02-15 14:49:36,427 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 2.1481481481481484) internal successors, (116), 53 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2022-02-15 14:49:36,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:49:36,455 INFO L225 Difference]: With dead ends: 15337 [2022-02-15 14:49:36,455 INFO L226 Difference]: Without dead ends: 15302 [2022-02-15 14:49:36,456 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 59 SyntacticMatches, 5 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1663 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=461, Invalid=5701, Unknown=0, NotChecked=0, Total=6162 [2022-02-15 14:49:36,456 INFO L933 BasicCegarLoop]: 114 mSDtfsCounter, 306 mSDsluCounter, 3058 mSDsCounter, 0 mSdLazyCounter, 3160 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 306 SdHoareTripleChecker+Valid, 2439 SdHoareTripleChecker+Invalid, 3233 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 3160 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-02-15 14:49:36,456 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [306 Valid, 2439 Invalid, 3233 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 3160 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-02-15 14:49:36,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15302 states. [2022-02-15 14:49:36,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15302 to 7138. [2022-02-15 14:49:36,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7138 states, 7137 states have (on average 3.0339078043996075) internal successors, (21653), 7137 states have internal predecessors, (21653), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:49:36,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7138 states to 7138 states and 21653 transitions. [2022-02-15 14:49:36,609 INFO L78 Accepts]: Start accepts. Automaton has 7138 states and 21653 transitions. Word has length 48 [2022-02-15 14:49:36,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:49:36,609 INFO L470 AbstractCegarLoop]: Abstraction has 7138 states and 21653 transitions. [2022-02-15 14:49:36,609 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 2.1481481481481484) internal successors, (116), 53 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:49:36,609 INFO L276 IsEmpty]: Start isEmpty. Operand 7138 states and 21653 transitions. [2022-02-15 14:49:36,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-02-15 14:49:36,618 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:49:36,618 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:49:36,635 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (162)] Forceful destruction successful, exit code 0 [2022-02-15 14:49:36,818 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164,162 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:49:36,818 INFO L402 AbstractCegarLoop]: === Iteration 166 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 14:49:36,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:49:36,819 INFO L85 PathProgramCache]: Analyzing trace with hash 2124583015, now seen corresponding path program 74 times [2022-02-15 14:49:36,819 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:49:36,819 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [920907839] [2022-02-15 14:49:36,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:49:36,819 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:49:36,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:49:37,366 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:49:37,367 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:49:37,367 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [920907839] [2022-02-15 14:49:37,367 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [920907839] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:49:37,367 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2115270279] [2022-02-15 14:49:37,367 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-15 14:49:37,367 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:49:37,367 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:49:37,368 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) [2022-02-15 14:49:37,368 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (163)] Waiting until timeout for monitored process [2022-02-15 14:49:37,394 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-15 14:49:37,394 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:49:37,395 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2022-02-15 14:49:37,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:49:37,585 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 11 treesize of output 7 [2022-02-15 14:49:37,770 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-02-15 14:49:38,365 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:49:38,365 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:49:39,112 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:49:39,112 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 36 [2022-02-15 14:49:39,238 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:49:39,238 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 37 treesize of output 39 [2022-02-15 14:49:39,465 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:49:39,465 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2115270279] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:49:39,465 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:49:39,465 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20, 20] total 53 [2022-02-15 14:49:39,465 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118012978] [2022-02-15 14:49:39,465 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:49:39,465 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2022-02-15 14:49:39,465 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:49:39,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2022-02-15 14:49:39,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=209, Invalid=2653, Unknown=0, NotChecked=0, Total=2862 [2022-02-15 14:49:39,466 INFO L87 Difference]: Start difference. First operand 7138 states and 21653 transitions. Second operand has 54 states, 54 states have (on average 2.1481481481481484) internal successors, (116), 53 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:49:42,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:49:42,584 INFO L93 Difference]: Finished difference Result 21362 states and 63936 transitions. [2022-02-15 14:49:42,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-02-15 14:49:42,584 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 2.1481481481481484) internal successors, (116), 53 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2022-02-15 14:49:42,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:49:42,650 INFO L225 Difference]: With dead ends: 21362 [2022-02-15 14:49:42,650 INFO L226 Difference]: Without dead ends: 21288 [2022-02-15 14:49:42,650 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 56 SyntacticMatches, 12 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2103 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=589, Invalid=6721, Unknown=0, NotChecked=0, Total=7310 [2022-02-15 14:49:42,650 INFO L933 BasicCegarLoop]: 120 mSDtfsCounter, 416 mSDsluCounter, 3059 mSDsCounter, 0 mSdLazyCounter, 3118 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 416 SdHoareTripleChecker+Valid, 2399 SdHoareTripleChecker+Invalid, 3300 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 3118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 86 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-02-15 14:49:42,650 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [416 Valid, 2399 Invalid, 3300 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 3118 Invalid, 0 Unknown, 86 Unchecked, 1.2s Time] [2022-02-15 14:49:42,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21288 states. [2022-02-15 14:49:42,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21288 to 7130. [2022-02-15 14:49:42,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7130 states, 7129 states have (on average 3.0346472155982607) internal successors, (21634), 7129 states have internal predecessors, (21634), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:49:42,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7130 states to 7130 states and 21634 transitions. [2022-02-15 14:49:42,813 INFO L78 Accepts]: Start accepts. Automaton has 7130 states and 21634 transitions. Word has length 48 [2022-02-15 14:49:42,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:49:42,813 INFO L470 AbstractCegarLoop]: Abstraction has 7130 states and 21634 transitions. [2022-02-15 14:49:42,813 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 2.1481481481481484) internal successors, (116), 53 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:49:42,813 INFO L276 IsEmpty]: Start isEmpty. Operand 7130 states and 21634 transitions. [2022-02-15 14:49:42,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-02-15 14:49:42,821 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:49:42,821 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:49:42,836 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (163)] Forceful destruction successful, exit code 0 [2022-02-15 14:49:43,021 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable165,163 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:49:43,022 INFO L402 AbstractCegarLoop]: === Iteration 167 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 14:49:43,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:49:43,022 INFO L85 PathProgramCache]: Analyzing trace with hash -896412165, now seen corresponding path program 75 times [2022-02-15 14:49:43,022 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:49:43,022 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1735533699] [2022-02-15 14:49:43,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:49:43,022 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:49:43,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:49:43,536 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:49:43,537 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:49:43,537 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1735533699] [2022-02-15 14:49:43,537 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1735533699] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:49:43,537 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [739868905] [2022-02-15 14:49:43,537 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-15 14:49:43,537 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:49:43,537 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:49:43,538 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) [2022-02-15 14:49:43,538 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (164)] Waiting until timeout for monitored process [2022-02-15 14:49:43,567 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-15 14:49:43,568 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:49:43,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2022-02-15 14:49:43,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:49:43,759 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-02-15 14:49:43,944 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 11 treesize of output 7 [2022-02-15 14:49:44,490 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:49:44,490 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:49:45,224 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:49:45,224 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 34 treesize of output 36 [2022-02-15 14:49:45,351 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:49:45,351 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 39 [2022-02-15 14:49:45,573 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:49:45,573 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [739868905] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:49:45,573 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:49:45,573 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20, 20] total 53 [2022-02-15 14:49:45,573 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74495948] [2022-02-15 14:49:45,573 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:49:45,574 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2022-02-15 14:49:45,574 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:49:45,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2022-02-15 14:49:45,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=209, Invalid=2653, Unknown=0, NotChecked=0, Total=2862 [2022-02-15 14:49:45,574 INFO L87 Difference]: Start difference. First operand 7130 states and 21634 transitions. Second operand has 54 states, 54 states have (on average 2.1666666666666665) internal successors, (117), 53 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:49:48,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:49:48,179 INFO L93 Difference]: Finished difference Result 12728 states and 38323 transitions. [2022-02-15 14:49:48,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-02-15 14:49:48,179 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 2.1666666666666665) internal successors, (117), 53 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2022-02-15 14:49:48,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:49:48,200 INFO L225 Difference]: With dead ends: 12728 [2022-02-15 14:49:48,200 INFO L226 Difference]: Without dead ends: 12635 [2022-02-15 14:49:48,201 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 57 SyntacticMatches, 7 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1788 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=522, Invalid=6120, Unknown=0, NotChecked=0, Total=6642 [2022-02-15 14:49:48,201 INFO L933 BasicCegarLoop]: 107 mSDtfsCounter, 416 mSDsluCounter, 2853 mSDsCounter, 0 mSdLazyCounter, 2817 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 416 SdHoareTripleChecker+Valid, 2235 SdHoareTripleChecker+Invalid, 3100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 2817 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 185 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-02-15 14:49:48,201 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [416 Valid, 2235 Invalid, 3100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 2817 Invalid, 0 Unknown, 185 Unchecked, 1.1s Time] [2022-02-15 14:49:48,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12635 states. [2022-02-15 14:49:48,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12635 to 7142. [2022-02-15 14:49:48,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7142 states, 7141 states have (on average 3.0331886290435515) internal successors, (21660), 7141 states have internal predecessors, (21660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:49:48,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7142 states to 7142 states and 21660 transitions. [2022-02-15 14:49:48,326 INFO L78 Accepts]: Start accepts. Automaton has 7142 states and 21660 transitions. Word has length 48 [2022-02-15 14:49:48,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:49:48,326 INFO L470 AbstractCegarLoop]: Abstraction has 7142 states and 21660 transitions. [2022-02-15 14:49:48,326 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 2.1666666666666665) internal successors, (117), 53 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:49:48,326 INFO L276 IsEmpty]: Start isEmpty. Operand 7142 states and 21660 transitions. [2022-02-15 14:49:48,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-02-15 14:49:48,334 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:49:48,334 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:49:48,349 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (164)] Forceful destruction successful, exit code 0 [2022-02-15 14:49:48,535 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable166,164 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:49:48,535 INFO L402 AbstractCegarLoop]: === Iteration 168 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 14:49:48,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:49:48,535 INFO L85 PathProgramCache]: Analyzing trace with hash 1732156545, now seen corresponding path program 76 times [2022-02-15 14:49:48,535 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:49:48,535 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1532505357] [2022-02-15 14:49:48,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:49:48,535 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:49:48,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:49:49,051 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:49:49,051 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:49:49,051 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1532505357] [2022-02-15 14:49:49,051 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1532505357] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:49:49,051 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [151188356] [2022-02-15 14:49:49,052 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-15 14:49:49,052 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:49:49,052 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:49:49,053 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) [2022-02-15 14:49:49,053 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (165)] Waiting until timeout for monitored process [2022-02-15 14:49:49,078 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-15 14:49:49,078 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:49:49,079 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2022-02-15 14:49:49,079 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:49:49,286 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 15 treesize of output 7 [2022-02-15 14:49:49,474 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 15 treesize of output 7 [2022-02-15 14:49:50,081 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:49:50,081 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:49:50,808 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:49:50,809 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 36 [2022-02-15 14:49:50,932 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:49:50,932 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 37 treesize of output 39 [2022-02-15 14:49:51,157 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:49:51,158 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [151188356] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:49:51,158 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:49:51,158 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20, 20] total 53 [2022-02-15 14:49:51,158 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1964837714] [2022-02-15 14:49:51,158 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:49:51,158 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2022-02-15 14:49:51,158 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:49:51,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2022-02-15 14:49:51,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=213, Invalid=2649, Unknown=0, NotChecked=0, Total=2862 [2022-02-15 14:49:51,159 INFO L87 Difference]: Start difference. First operand 7142 states and 21660 transitions. Second operand has 54 states, 54 states have (on average 2.1666666666666665) internal successors, (117), 53 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:49:53,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:49:53,548 INFO L93 Difference]: Finished difference Result 15290 states and 45778 transitions. [2022-02-15 14:49:53,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-02-15 14:49:53,548 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 2.1666666666666665) internal successors, (117), 53 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2022-02-15 14:49:53,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:49:53,573 INFO L225 Difference]: With dead ends: 15290 [2022-02-15 14:49:53,573 INFO L226 Difference]: Without dead ends: 15237 [2022-02-15 14:49:53,574 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 53 SyntacticMatches, 11 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1790 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=453, Invalid=5553, Unknown=0, NotChecked=0, Total=6006 [2022-02-15 14:49:53,574 INFO L933 BasicCegarLoop]: 107 mSDtfsCounter, 310 mSDsluCounter, 2941 mSDsCounter, 0 mSdLazyCounter, 3097 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 310 SdHoareTripleChecker+Valid, 2296 SdHoareTripleChecker+Invalid, 3170 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 3097 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-02-15 14:49:53,574 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [310 Valid, 2296 Invalid, 3170 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 3097 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-02-15 14:49:53,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15237 states. [2022-02-15 14:49:53,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15237 to 7128. [2022-02-15 14:49:53,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7128 states, 7127 states have (on average 3.0347972498947664) internal successors, (21629), 7127 states have internal predecessors, (21629), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:49:53,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7128 states to 7128 states and 21629 transitions. [2022-02-15 14:49:53,759 INFO L78 Accepts]: Start accepts. Automaton has 7128 states and 21629 transitions. Word has length 48 [2022-02-15 14:49:53,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:49:53,759 INFO L470 AbstractCegarLoop]: Abstraction has 7128 states and 21629 transitions. [2022-02-15 14:49:53,760 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 2.1666666666666665) internal successors, (117), 53 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:49:53,760 INFO L276 IsEmpty]: Start isEmpty. Operand 7128 states and 21629 transitions. [2022-02-15 14:49:53,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-02-15 14:49:53,767 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:49:53,767 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:49:53,782 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (165)] Forceful destruction successful, exit code 0 [2022-02-15 14:49:53,967 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,SelfDestructingSolverStorable167 [2022-02-15 14:49:53,968 INFO L402 AbstractCegarLoop]: === Iteration 169 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 14:49:53,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:49:53,968 INFO L85 PathProgramCache]: Analyzing trace with hash 310275829, now seen corresponding path program 77 times [2022-02-15 14:49:53,968 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:49:53,968 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1511980226] [2022-02-15 14:49:53,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:49:53,968 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:49:53,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:49:54,486 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:49:54,487 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:49:54,487 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1511980226] [2022-02-15 14:49:54,487 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1511980226] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:49:54,487 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [992848409] [2022-02-15 14:49:54,487 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-15 14:49:54,487 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:49:54,487 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:49:54,488 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) [2022-02-15 14:49:54,488 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (166)] Waiting until timeout for monitored process [2022-02-15 14:49:54,514 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-15 14:49:54,515 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:49:54,515 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2022-02-15 14:49:54,516 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:49:54,708 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-02-15 14:49:54,902 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 15 treesize of output 7 [2022-02-15 14:49:55,493 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:49:55,493 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:49:56,243 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:49:56,243 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 34 treesize of output 36 [2022-02-15 14:49:56,375 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:49:56,375 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 39 [2022-02-15 14:49:56,592 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:49:56,592 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [992848409] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:49:56,592 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:49:56,592 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20, 20] total 53 [2022-02-15 14:49:56,592 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1803072032] [2022-02-15 14:49:56,592 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:49:56,593 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2022-02-15 14:49:56,593 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:49:56,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2022-02-15 14:49:56,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=213, Invalid=2649, Unknown=0, NotChecked=0, Total=2862 [2022-02-15 14:49:56,593 INFO L87 Difference]: Start difference. First operand 7128 states and 21629 transitions. Second operand has 54 states, 54 states have (on average 2.1481481481481484) internal successors, (116), 53 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:49:59,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:49:59,142 INFO L93 Difference]: Finished difference Result 15318 states and 45833 transitions. [2022-02-15 14:49:59,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-02-15 14:49:59,142 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 2.1481481481481484) internal successors, (116), 53 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2022-02-15 14:49:59,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:49:59,166 INFO L225 Difference]: With dead ends: 15318 [2022-02-15 14:49:59,166 INFO L226 Difference]: Without dead ends: 15283 [2022-02-15 14:49:59,167 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 54 SyntacticMatches, 10 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1803 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=461, Invalid=5701, Unknown=0, NotChecked=0, Total=6162 [2022-02-15 14:49:59,167 INFO L933 BasicCegarLoop]: 116 mSDtfsCounter, 290 mSDsluCounter, 3490 mSDsCounter, 0 mSdLazyCounter, 3489 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 290 SdHoareTripleChecker+Valid, 2733 SdHoareTripleChecker+Invalid, 3561 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 3489 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-02-15 14:49:59,167 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [290 Valid, 2733 Invalid, 3561 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 3489 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-02-15 14:49:59,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15283 states. [2022-02-15 14:49:59,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15283 to 7132. [2022-02-15 14:49:59,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7132 states, 7131 states have (on average 3.0340765671013883) internal successors, (21636), 7131 states have internal predecessors, (21636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:49:59,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7132 states to 7132 states and 21636 transitions. [2022-02-15 14:49:59,314 INFO L78 Accepts]: Start accepts. Automaton has 7132 states and 21636 transitions. Word has length 48 [2022-02-15 14:49:59,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:49:59,314 INFO L470 AbstractCegarLoop]: Abstraction has 7132 states and 21636 transitions. [2022-02-15 14:49:59,314 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 2.1481481481481484) internal successors, (116), 53 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:49:59,314 INFO L276 IsEmpty]: Start isEmpty. Operand 7132 states and 21636 transitions. [2022-02-15 14:49:59,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-02-15 14:49:59,322 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:49:59,322 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:49:59,339 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (166)] Ended with exit code 0 [2022-02-15 14:49:59,523 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 166 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable168 [2022-02-15 14:49:59,523 INFO L402 AbstractCegarLoop]: === Iteration 170 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 14:49:59,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:49:59,523 INFO L85 PathProgramCache]: Analyzing trace with hash 1186458293, now seen corresponding path program 78 times [2022-02-15 14:49:59,523 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:49:59,523 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [118584582] [2022-02-15 14:49:59,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:49:59,523 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:49:59,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:50:00,045 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:50:00,045 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:50:00,045 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [118584582] [2022-02-15 14:50:00,045 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [118584582] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:50:00,045 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1457854357] [2022-02-15 14:50:00,045 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-15 14:50:00,045 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:50:00,045 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:50:00,046 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) [2022-02-15 14:50:00,046 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (167)] Waiting until timeout for monitored process [2022-02-15 14:50:00,073 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-15 14:50:00,073 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:50:00,074 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2022-02-15 14:50:00,074 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:50:00,264 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 11 treesize of output 7 [2022-02-15 14:50:00,451 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-02-15 14:50:01,054 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:50:01,054 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:50:01,830 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:50:01,830 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 36 [2022-02-15 14:50:01,954 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:50:01,954 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 37 treesize of output 39 [2022-02-15 14:50:02,175 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:50:02,175 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1457854357] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:50:02,175 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:50:02,175 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20, 20] total 53 [2022-02-15 14:50:02,175 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2077036861] [2022-02-15 14:50:02,176 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:50:02,176 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2022-02-15 14:50:02,176 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:50:02,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2022-02-15 14:50:02,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=209, Invalid=2653, Unknown=0, NotChecked=0, Total=2862 [2022-02-15 14:50:02,176 INFO L87 Difference]: Start difference. First operand 7132 states and 21636 transitions. Second operand has 54 states, 54 states have (on average 2.1481481481481484) internal successors, (116), 53 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:50:04,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:50:04,830 INFO L93 Difference]: Finished difference Result 12624 states and 38103 transitions. [2022-02-15 14:50:04,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-02-15 14:50:04,830 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 2.1481481481481484) internal successors, (116), 53 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2022-02-15 14:50:04,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:50:04,852 INFO L225 Difference]: With dead ends: 12624 [2022-02-15 14:50:04,852 INFO L226 Difference]: Without dead ends: 12572 [2022-02-15 14:50:04,852 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 55 SyntacticMatches, 9 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1725 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=489, Invalid=5673, Unknown=0, NotChecked=0, Total=6162 [2022-02-15 14:50:04,852 INFO L933 BasicCegarLoop]: 107 mSDtfsCounter, 373 mSDsluCounter, 3240 mSDsCounter, 0 mSdLazyCounter, 3378 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 373 SdHoareTripleChecker+Valid, 2589 SdHoareTripleChecker+Invalid, 3472 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 3378 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-02-15 14:50:04,853 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [373 Valid, 2589 Invalid, 3472 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 3378 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-02-15 14:50:04,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12572 states. [2022-02-15 14:50:04,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12572 to 7120. [2022-02-15 14:50:04,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7120 states, 7119 states have (on average 3.0361005759235846) internal successors, (21614), 7119 states have internal predecessors, (21614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:50:04,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7120 states to 7120 states and 21614 transitions. [2022-02-15 14:50:04,982 INFO L78 Accepts]: Start accepts. Automaton has 7120 states and 21614 transitions. Word has length 48 [2022-02-15 14:50:04,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:50:04,982 INFO L470 AbstractCegarLoop]: Abstraction has 7120 states and 21614 transitions. [2022-02-15 14:50:04,982 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 2.1481481481481484) internal successors, (116), 53 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:50:04,982 INFO L276 IsEmpty]: Start isEmpty. Operand 7120 states and 21614 transitions. [2022-02-15 14:50:04,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-02-15 14:50:04,991 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:50:04,991 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:50:05,006 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (167)] Forceful destruction successful, exit code 0 [2022-02-15 14:50:05,191 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 167 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable169 [2022-02-15 14:50:05,191 INFO L402 AbstractCegarLoop]: === Iteration 171 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 14:50:05,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:50:05,192 INFO L85 PathProgramCache]: Analyzing trace with hash 1314885943, now seen corresponding path program 79 times [2022-02-15 14:50:05,192 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:50:05,192 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1746107061] [2022-02-15 14:50:05,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:50:05,192 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:50:05,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:50:05,728 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:50:05,728 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:50:05,728 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1746107061] [2022-02-15 14:50:05,728 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1746107061] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:50:05,728 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1000274121] [2022-02-15 14:50:05,728 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-15 14:50:05,728 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:50:05,728 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:50:05,729 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) [2022-02-15 14:50:05,729 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (168)] Waiting until timeout for monitored process [2022-02-15 14:50:05,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:50:05,755 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2022-02-15 14:50:05,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:50:05,947 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-02-15 14:50:06,135 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-02-15 14:50:06,707 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:50:06,707 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:50:07,457 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:50:07,458 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 36 [2022-02-15 14:50:07,587 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:50:07,587 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 37 treesize of output 39 [2022-02-15 14:50:07,829 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:50:07,830 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1000274121] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:50:07,830 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:50:07,830 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20, 20] total 53 [2022-02-15 14:50:07,830 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1315307168] [2022-02-15 14:50:07,830 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:50:07,830 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2022-02-15 14:50:07,830 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:50:07,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2022-02-15 14:50:07,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=209, Invalid=2653, Unknown=0, NotChecked=0, Total=2862 [2022-02-15 14:50:07,831 INFO L87 Difference]: Start difference. First operand 7120 states and 21614 transitions. Second operand has 54 states, 54 states have (on average 2.1666666666666665) internal successors, (117), 53 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:50:10,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:50:10,568 INFO L93 Difference]: Finished difference Result 12659 states and 38175 transitions. [2022-02-15 14:50:10,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-02-15 14:50:10,569 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 2.1666666666666665) internal successors, (117), 53 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2022-02-15 14:50:10,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:50:10,590 INFO L225 Difference]: With dead ends: 12659 [2022-02-15 14:50:10,590 INFO L226 Difference]: Without dead ends: 12619 [2022-02-15 14:50:10,590 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 55 SyntacticMatches, 9 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1761 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=503, Invalid=5817, Unknown=0, NotChecked=0, Total=6320 [2022-02-15 14:50:10,590 INFO L933 BasicCegarLoop]: 104 mSDtfsCounter, 400 mSDsluCounter, 3405 mSDsCounter, 0 mSdLazyCounter, 3441 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 400 SdHoareTripleChecker+Valid, 2619 SdHoareTripleChecker+Invalid, 3621 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 3441 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 85 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-02-15 14:50:10,590 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [400 Valid, 2619 Invalid, 3621 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 3441 Invalid, 0 Unknown, 85 Unchecked, 1.2s Time] [2022-02-15 14:50:10,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12619 states. [2022-02-15 14:50:10,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12619 to 7126. [2022-02-15 14:50:10,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7126 states, 7125 states have (on average 3.0353684210526315) internal successors, (21627), 7125 states have internal predecessors, (21627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:50:10,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7126 states to 7126 states and 21627 transitions. [2022-02-15 14:50:10,712 INFO L78 Accepts]: Start accepts. Automaton has 7126 states and 21627 transitions. Word has length 48 [2022-02-15 14:50:10,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:50:10,712 INFO L470 AbstractCegarLoop]: Abstraction has 7126 states and 21627 transitions. [2022-02-15 14:50:10,712 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 2.1666666666666665) internal successors, (117), 53 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:50:10,712 INFO L276 IsEmpty]: Start isEmpty. Operand 7126 states and 21627 transitions. [2022-02-15 14:50:10,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-02-15 14:50:10,721 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:50:10,721 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:50:10,736 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (168)] Forceful destruction successful, exit code 0 [2022-02-15 14:50:10,921 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,SelfDestructingSolverStorable170 [2022-02-15 14:50:10,921 INFO L402 AbstractCegarLoop]: === Iteration 172 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 14:50:10,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:50:10,921 INFO L85 PathProgramCache]: Analyzing trace with hash -351512643, now seen corresponding path program 80 times [2022-02-15 14:50:10,922 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:50:10,922 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [619102710] [2022-02-15 14:50:10,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:50:10,922 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:50:10,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:50:11,455 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:50:11,455 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:50:11,455 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [619102710] [2022-02-15 14:50:11,455 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [619102710] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:50:11,455 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1004786907] [2022-02-15 14:50:11,455 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-15 14:50:11,455 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:50:11,455 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:50:11,456 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) [2022-02-15 14:50:11,456 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (169)] Waiting until timeout for monitored process [2022-02-15 14:50:11,482 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-15 14:50:11,482 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:50:11,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2022-02-15 14:50:11,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:50:11,674 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 15 treesize of output 7 [2022-02-15 14:50:11,870 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-02-15 14:50:12,359 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:50:12,359 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:50:13,082 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:50:13,083 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 36 [2022-02-15 14:50:13,204 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:50:13,204 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 37 treesize of output 39 [2022-02-15 14:50:13,435 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:50:13,435 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1004786907] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:50:13,435 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:50:13,435 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20, 20] total 53 [2022-02-15 14:50:13,435 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992370139] [2022-02-15 14:50:13,435 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:50:13,435 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2022-02-15 14:50:13,436 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:50:13,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2022-02-15 14:50:13,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=213, Invalid=2649, Unknown=0, NotChecked=0, Total=2862 [2022-02-15 14:50:13,436 INFO L87 Difference]: Start difference. First operand 7126 states and 21627 transitions. Second operand has 54 states, 54 states have (on average 2.1666666666666665) internal successors, (117), 53 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:50:15,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:50:15,815 INFO L93 Difference]: Finished difference Result 15274 states and 45745 transitions. [2022-02-15 14:50:15,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-02-15 14:50:15,816 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 2.1666666666666665) internal successors, (117), 53 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2022-02-15 14:50:15,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:50:15,844 INFO L225 Difference]: With dead ends: 15274 [2022-02-15 14:50:15,844 INFO L226 Difference]: Without dead ends: 15186 [2022-02-15 14:50:15,844 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 58 SyntacticMatches, 6 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1650 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=453, Invalid=5553, Unknown=0, NotChecked=0, Total=6006 [2022-02-15 14:50:15,845 INFO L933 BasicCegarLoop]: 108 mSDtfsCounter, 300 mSDsluCounter, 3085 mSDsCounter, 0 mSdLazyCounter, 3269 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 300 SdHoareTripleChecker+Valid, 2398 SdHoareTripleChecker+Invalid, 3344 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 3269 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-02-15 14:50:15,845 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [300 Valid, 2398 Invalid, 3344 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 3269 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-02-15 14:50:15,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15186 states. [2022-02-15 14:50:15,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15186 to 7077. [2022-02-15 14:50:15,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7077 states, 7076 states have (on average 3.0416902204635385) internal successors, (21523), 7076 states have internal predecessors, (21523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:50:16,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7077 states to 7077 states and 21523 transitions. [2022-02-15 14:50:16,003 INFO L78 Accepts]: Start accepts. Automaton has 7077 states and 21523 transitions. Word has length 48 [2022-02-15 14:50:16,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:50:16,003 INFO L470 AbstractCegarLoop]: Abstraction has 7077 states and 21523 transitions. [2022-02-15 14:50:16,003 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 2.1666666666666665) internal successors, (117), 53 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:50:16,003 INFO L276 IsEmpty]: Start isEmpty. Operand 7077 states and 21523 transitions. [2022-02-15 14:50:16,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-02-15 14:50:16,011 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:50:16,012 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:50:16,027 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (169)] Forceful destruction successful, exit code 0 [2022-02-15 14:50:16,215 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable171,169 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:50:16,215 INFO L402 AbstractCegarLoop]: === Iteration 173 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 14:50:16,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:50:16,215 INFO L85 PathProgramCache]: Analyzing trace with hash 1942194647, now seen corresponding path program 81 times [2022-02-15 14:50:16,215 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:50:16,216 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1158167652] [2022-02-15 14:50:16,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:50:16,216 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:50:16,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:50:16,723 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:50:16,723 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:50:16,723 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1158167652] [2022-02-15 14:50:16,723 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1158167652] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:50:16,723 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [423985282] [2022-02-15 14:50:16,723 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-15 14:50:16,723 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:50:16,723 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:50:16,744 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) [2022-02-15 14:50:16,762 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (170)] Waiting until timeout for monitored process [2022-02-15 14:50:16,788 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-15 14:50:16,788 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:50:16,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 48 conjunts are in the unsatisfiable core [2022-02-15 14:50:16,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:50:16,978 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 11 treesize of output 7 [2022-02-15 14:50:17,259 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 15 treesize of output 7 [2022-02-15 14:50:17,790 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:50:17,791 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:50:18,568 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:50:18,569 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 36 [2022-02-15 14:50:18,717 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:50:18,718 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 42 [2022-02-15 14:50:18,973 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:50:18,973 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [423985282] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:50:18,973 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:50:18,973 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 22, 22] total 56 [2022-02-15 14:50:18,973 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [955618106] [2022-02-15 14:50:18,973 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:50:18,974 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2022-02-15 14:50:18,974 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:50:18,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2022-02-15 14:50:18,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=2959, Unknown=0, NotChecked=0, Total=3192 [2022-02-15 14:50:18,974 INFO L87 Difference]: Start difference. First operand 7077 states and 21523 transitions. Second operand has 57 states, 57 states have (on average 2.017543859649123) internal successors, (115), 56 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:50:22,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:50:22,855 INFO L93 Difference]: Finished difference Result 12161 states and 36108 transitions. [2022-02-15 14:50:22,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-02-15 14:50:22,855 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 2.017543859649123) internal successors, (115), 56 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2022-02-15 14:50:22,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:50:22,873 INFO L225 Difference]: With dead ends: 12161 [2022-02-15 14:50:22,874 INFO L226 Difference]: Without dead ends: 12084 [2022-02-15 14:50:22,874 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 59 SyntacticMatches, 7 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2554 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=633, Invalid=8873, Unknown=0, NotChecked=0, Total=9506 [2022-02-15 14:50:22,874 INFO L933 BasicCegarLoop]: 139 mSDtfsCounter, 282 mSDsluCounter, 5527 mSDsCounter, 0 mSdLazyCounter, 5358 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 282 SdHoareTripleChecker+Valid, 4039 SdHoareTripleChecker+Invalid, 5892 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 5358 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 470 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-02-15 14:50:22,874 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [282 Valid, 4039 Invalid, 5892 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 5358 Invalid, 0 Unknown, 470 Unchecked, 1.9s Time] [2022-02-15 14:50:22,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12084 states. [2022-02-15 14:50:22,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12084 to 7169. [2022-02-15 14:50:22,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7169 states, 7168 states have (on average 3.0330636160714284) internal successors, (21741), 7168 states have internal predecessors, (21741), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:50:22,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7169 states to 7169 states and 21741 transitions. [2022-02-15 14:50:22,995 INFO L78 Accepts]: Start accepts. Automaton has 7169 states and 21741 transitions. Word has length 48 [2022-02-15 14:50:22,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:50:22,995 INFO L470 AbstractCegarLoop]: Abstraction has 7169 states and 21741 transitions. [2022-02-15 14:50:22,995 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 2.017543859649123) internal successors, (115), 56 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:50:22,996 INFO L276 IsEmpty]: Start isEmpty. Operand 7169 states and 21741 transitions. [2022-02-15 14:50:23,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-02-15 14:50:23,004 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:50:23,004 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:50:23,021 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (170)] Ended with exit code 0 [2022-02-15 14:50:23,204 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable172,170 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:50:23,204 INFO L402 AbstractCegarLoop]: === Iteration 174 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 14:50:23,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:50:23,205 INFO L85 PathProgramCache]: Analyzing trace with hash 1825856653, now seen corresponding path program 82 times [2022-02-15 14:50:23,205 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:50:23,205 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1967209549] [2022-02-15 14:50:23,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:50:23,205 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:50:23,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:50:23,707 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:50:23,708 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:50:23,708 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1967209549] [2022-02-15 14:50:23,708 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1967209549] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:50:23,708 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2048961609] [2022-02-15 14:50:23,708 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-15 14:50:23,708 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:50:23,708 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:50:23,709 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) [2022-02-15 14:50:23,709 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (171)] Waiting until timeout for monitored process [2022-02-15 14:50:23,734 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-15 14:50:23,734 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:50:23,735 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2022-02-15 14:50:23,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:50:23,926 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-02-15 14:50:24,129 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 11 treesize of output 7 [2022-02-15 14:50:24,633 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:50:24,633 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:50:25,303 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:50:25,303 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 36 [2022-02-15 14:50:25,437 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:50:25,438 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 39 [2022-02-15 14:50:25,667 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:50:25,667 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2048961609] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:50:25,667 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:50:25,667 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20, 20] total 52 [2022-02-15 14:50:25,667 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846153907] [2022-02-15 14:50:25,667 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:50:25,667 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-02-15 14:50:25,667 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:50:25,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-02-15 14:50:25,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=208, Invalid=2548, Unknown=0, NotChecked=0, Total=2756 [2022-02-15 14:50:25,668 INFO L87 Difference]: Start difference. First operand 7169 states and 21741 transitions. Second operand has 53 states, 53 states have (on average 2.188679245283019) internal successors, (116), 52 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:50:28,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:50:28,188 INFO L93 Difference]: Finished difference Result 15308 states and 45835 transitions. [2022-02-15 14:50:28,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-02-15 14:50:28,188 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 2.188679245283019) internal successors, (116), 52 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2022-02-15 14:50:28,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:50:28,217 INFO L225 Difference]: With dead ends: 15308 [2022-02-15 14:50:28,217 INFO L226 Difference]: Without dead ends: 15215 [2022-02-15 14:50:28,218 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 60 SyntacticMatches, 5 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1655 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=467, Invalid=5695, Unknown=0, NotChecked=0, Total=6162 [2022-02-15 14:50:28,218 INFO L933 BasicCegarLoop]: 110 mSDtfsCounter, 314 mSDsluCounter, 3660 mSDsCounter, 0 mSdLazyCounter, 3520 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 314 SdHoareTripleChecker+Valid, 2827 SdHoareTripleChecker+Invalid, 3910 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 3520 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 316 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-02-15 14:50:28,218 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [314 Valid, 2827 Invalid, 3910 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 3520 Invalid, 0 Unknown, 316 Unchecked, 1.3s Time] [2022-02-15 14:50:28,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15215 states. [2022-02-15 14:50:28,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15215 to 7097. [2022-02-15 14:50:28,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7097 states, 7096 states have (on average 3.0386133032694476) internal successors, (21562), 7096 states have internal predecessors, (21562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:50:28,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7097 states to 7097 states and 21562 transitions. [2022-02-15 14:50:28,400 INFO L78 Accepts]: Start accepts. Automaton has 7097 states and 21562 transitions. Word has length 48 [2022-02-15 14:50:28,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:50:28,400 INFO L470 AbstractCegarLoop]: Abstraction has 7097 states and 21562 transitions. [2022-02-15 14:50:28,401 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 2.188679245283019) internal successors, (116), 52 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:50:28,401 INFO L276 IsEmpty]: Start isEmpty. Operand 7097 states and 21562 transitions. [2022-02-15 14:50:28,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-02-15 14:50:28,408 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:50:28,408 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:50:28,423 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (171)] Forceful destruction successful, exit code 0 [2022-02-15 14:50:28,609 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173,171 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:50:28,609 INFO L402 AbstractCegarLoop]: === Iteration 175 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 14:50:28,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:50:28,609 INFO L85 PathProgramCache]: Analyzing trace with hash 1173462551, now seen corresponding path program 83 times [2022-02-15 14:50:28,609 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:50:28,609 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [44539442] [2022-02-15 14:50:28,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:50:28,609 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:50:28,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:50:29,126 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:50:29,126 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:50:29,126 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [44539442] [2022-02-15 14:50:29,126 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [44539442] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:50:29,126 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1351131605] [2022-02-15 14:50:29,127 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-15 14:50:29,127 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:50:29,127 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:50:29,127 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) [2022-02-15 14:50:29,128 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (172)] Waiting until timeout for monitored process [2022-02-15 14:50:29,154 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-15 14:50:29,154 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:50:29,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 42 conjunts are in the unsatisfiable core [2022-02-15 14:50:29,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:50:29,351 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-02-15 14:50:29,547 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-02-15 14:50:30,063 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:50:30,063 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:50:30,794 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:50:30,794 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 36 [2022-02-15 14:50:30,918 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:50:30,918 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 37 treesize of output 39 [2022-02-15 14:50:31,150 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:50:31,150 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1351131605] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:50:31,150 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:50:31,150 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21, 21] total 54 [2022-02-15 14:50:31,150 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1093345301] [2022-02-15 14:50:31,150 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:50:31,150 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2022-02-15 14:50:31,150 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:50:31,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2022-02-15 14:50:31,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=213, Invalid=2757, Unknown=0, NotChecked=0, Total=2970 [2022-02-15 14:50:31,151 INFO L87 Difference]: Start difference. First operand 7097 states and 21562 transitions. Second operand has 55 states, 55 states have (on average 2.090909090909091) internal successors, (115), 54 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:50:33,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:50:33,904 INFO L93 Difference]: Finished difference Result 15262 states and 45725 transitions. [2022-02-15 14:50:33,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-02-15 14:50:33,904 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 2.090909090909091) internal successors, (115), 54 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2022-02-15 14:50:33,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:50:33,931 INFO L225 Difference]: With dead ends: 15262 [2022-02-15 14:50:33,931 INFO L226 Difference]: Without dead ends: 15227 [2022-02-15 14:50:33,931 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 59 SyntacticMatches, 4 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1651 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=446, Invalid=5716, Unknown=0, NotChecked=0, Total=6162 [2022-02-15 14:50:33,932 INFO L933 BasicCegarLoop]: 114 mSDtfsCounter, 233 mSDsluCounter, 4357 mSDsCounter, 0 mSdLazyCounter, 4299 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 233 SdHoareTripleChecker+Valid, 3479 SdHoareTripleChecker+Invalid, 4361 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 4299 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-02-15 14:50:33,932 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [233 Valid, 3479 Invalid, 4361 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 4299 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-02-15 14:50:33,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15227 states. [2022-02-15 14:50:34,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15227 to 7109. [2022-02-15 14:50:34,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7109 states, 7108 states have (on average 3.037563308947665) internal successors, (21591), 7108 states have internal predecessors, (21591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:50:34,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7109 states to 7109 states and 21591 transitions. [2022-02-15 14:50:34,086 INFO L78 Accepts]: Start accepts. Automaton has 7109 states and 21591 transitions. Word has length 48 [2022-02-15 14:50:34,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:50:34,086 INFO L470 AbstractCegarLoop]: Abstraction has 7109 states and 21591 transitions. [2022-02-15 14:50:34,086 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 2.090909090909091) internal successors, (115), 54 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:50:34,086 INFO L276 IsEmpty]: Start isEmpty. Operand 7109 states and 21591 transitions. [2022-02-15 14:50:34,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-02-15 14:50:34,094 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:50:34,094 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:50:34,109 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (172)] Forceful destruction successful, exit code 0 [2022-02-15 14:50:34,294 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable174,172 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:50:34,294 INFO L402 AbstractCegarLoop]: === Iteration 176 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 14:50:34,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:50:34,295 INFO L85 PathProgramCache]: Analyzing trace with hash 2049645015, now seen corresponding path program 84 times [2022-02-15 14:50:34,295 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:50:34,295 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [229356868] [2022-02-15 14:50:34,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:50:34,295 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:50:34,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:50:34,816 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:50:34,816 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:50:34,816 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [229356868] [2022-02-15 14:50:34,816 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [229356868] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:50:34,816 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1815437210] [2022-02-15 14:50:34,816 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-15 14:50:34,816 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:50:34,816 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:50:34,817 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) [2022-02-15 14:50:34,817 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (173)] Waiting until timeout for monitored process [2022-02-15 14:50:34,843 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-15 14:50:34,843 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:50:34,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 44 conjunts are in the unsatisfiable core [2022-02-15 14:50:34,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:50:35,040 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-02-15 14:50:35,252 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 11 treesize of output 7 [2022-02-15 14:50:35,882 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:50:35,882 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:50:36,806 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:50:36,806 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 39 treesize of output 39 [2022-02-15 14:50:37,018 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:50:37,019 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 63 [2022-02-15 14:50:37,252 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:50:37,252 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1815437210] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:50:37,253 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:50:37,253 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 23, 23] total 60 [2022-02-15 14:50:37,253 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1499067590] [2022-02-15 14:50:37,253 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:50:37,253 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2022-02-15 14:50:37,253 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:50:37,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2022-02-15 14:50:37,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=254, Invalid=3406, Unknown=0, NotChecked=0, Total=3660 [2022-02-15 14:50:37,254 INFO L87 Difference]: Start difference. First operand 7109 states and 21591 transitions. Second operand has 61 states, 61 states have (on average 2.0655737704918034) internal successors, (126), 60 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:50:40,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:50:40,119 INFO L93 Difference]: Finished difference Result 13044 states and 39176 transitions. [2022-02-15 14:50:40,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-02-15 14:50:40,120 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 2.0655737704918034) internal successors, (126), 60 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2022-02-15 14:50:40,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:50:40,141 INFO L225 Difference]: With dead ends: 13044 [2022-02-15 14:50:40,141 INFO L226 Difference]: Without dead ends: 13000 [2022-02-15 14:50:40,141 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 53 SyntacticMatches, 4 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2114 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=567, Invalid=7265, Unknown=0, NotChecked=0, Total=7832 [2022-02-15 14:50:40,141 INFO L933 BasicCegarLoop]: 120 mSDtfsCounter, 379 mSDsluCounter, 3704 mSDsCounter, 0 mSdLazyCounter, 3626 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 379 SdHoareTripleChecker+Valid, 2937 SdHoareTripleChecker+Invalid, 3722 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 3626 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-02-15 14:50:40,142 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [379 Valid, 2937 Invalid, 3722 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 3626 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-02-15 14:50:40,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13000 states. [2022-02-15 14:50:40,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13000 to 7105. [2022-02-15 14:50:40,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7105 states, 7104 states have (on average 3.037725225225225) internal successors, (21580), 7104 states have internal predecessors, (21580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:50:40,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7105 states to 7105 states and 21580 transitions. [2022-02-15 14:50:40,263 INFO L78 Accepts]: Start accepts. Automaton has 7105 states and 21580 transitions. Word has length 48 [2022-02-15 14:50:40,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:50:40,263 INFO L470 AbstractCegarLoop]: Abstraction has 7105 states and 21580 transitions. [2022-02-15 14:50:40,263 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 2.0655737704918034) internal successors, (126), 60 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:50:40,263 INFO L276 IsEmpty]: Start isEmpty. Operand 7105 states and 21580 transitions. [2022-02-15 14:50:40,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-02-15 14:50:40,272 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:50:40,272 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:50:40,287 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (173)] Forceful destruction successful, exit code 0 [2022-02-15 14:50:40,473 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable175,173 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:50:40,473 INFO L402 AbstractCegarLoop]: === Iteration 177 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 14:50:40,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:50:40,473 INFO L85 PathProgramCache]: Analyzing trace with hash 1315177691, now seen corresponding path program 85 times [2022-02-15 14:50:40,473 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:50:40,473 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1976117921] [2022-02-15 14:50:40,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:50:40,473 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:50:40,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:50:41,002 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:50:41,002 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:50:41,002 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1976117921] [2022-02-15 14:50:41,002 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1976117921] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:50:41,002 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1301866399] [2022-02-15 14:50:41,002 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-15 14:50:41,002 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:50:41,002 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:50:41,003 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) [2022-02-15 14:50:41,004 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (174)] Waiting until timeout for monitored process [2022-02-15 14:50:41,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:50:41,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2022-02-15 14:50:41,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:50:41,229 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-02-15 14:50:41,424 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 11 treesize of output 7 [2022-02-15 14:50:41,991 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:50:41,991 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:50:42,715 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:50:42,715 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 36 [2022-02-15 14:50:42,842 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:50:42,842 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 37 treesize of output 39 [2022-02-15 14:50:43,072 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:50:43,072 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1301866399] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:50:43,073 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:50:43,073 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21, 21] total 55 [2022-02-15 14:50:43,073 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2045549603] [2022-02-15 14:50:43,073 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:50:43,073 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2022-02-15 14:50:43,073 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:50:43,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2022-02-15 14:50:43,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=218, Invalid=2862, Unknown=0, NotChecked=0, Total=3080 [2022-02-15 14:50:43,073 INFO L87 Difference]: Start difference. First operand 7105 states and 21580 transitions. Second operand has 56 states, 56 states have (on average 2.0892857142857144) internal successors, (117), 55 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:50:45,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:50:45,685 INFO L93 Difference]: Finished difference Result 14356 states and 42884 transitions. [2022-02-15 14:50:45,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-02-15 14:50:45,685 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 2.0892857142857144) internal successors, (117), 55 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2022-02-15 14:50:45,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:50:45,709 INFO L225 Difference]: With dead ends: 14356 [2022-02-15 14:50:45,709 INFO L226 Difference]: Without dead ends: 14347 [2022-02-15 14:50:45,710 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 60 SyntacticMatches, 3 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1766 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=463, Invalid=6179, Unknown=0, NotChecked=0, Total=6642 [2022-02-15 14:50:45,710 INFO L933 BasicCegarLoop]: 124 mSDtfsCounter, 342 mSDsluCounter, 4298 mSDsCounter, 0 mSdLazyCounter, 3768 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 342 SdHoareTripleChecker+Valid, 3478 SdHoareTripleChecker+Invalid, 4100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 3768 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 253 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-02-15 14:50:45,710 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [342 Valid, 3478 Invalid, 4100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 3768 Invalid, 0 Unknown, 253 Unchecked, 1.4s Time] [2022-02-15 14:50:45,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14347 states. [2022-02-15 14:50:45,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14347 to 7129. [2022-02-15 14:50:45,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7129 states, 7128 states have (on average 3.0356341189674523) internal successors, (21638), 7128 states have internal predecessors, (21638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:50:45,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7129 states to 7129 states and 21638 transitions. [2022-02-15 14:50:45,880 INFO L78 Accepts]: Start accepts. Automaton has 7129 states and 21638 transitions. Word has length 48 [2022-02-15 14:50:45,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:50:45,880 INFO L470 AbstractCegarLoop]: Abstraction has 7129 states and 21638 transitions. [2022-02-15 14:50:45,880 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 2.0892857142857144) internal successors, (117), 55 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:50:45,880 INFO L276 IsEmpty]: Start isEmpty. Operand 7129 states and 21638 transitions. [2022-02-15 14:50:45,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-02-15 14:50:45,888 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:50:45,888 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:50:45,906 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (174)] Forceful destruction successful, exit code 0 [2022-02-15 14:50:46,088 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable176,174 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:50:46,089 INFO L402 AbstractCegarLoop]: === Iteration 178 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 14:50:46,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:50:46,089 INFO L85 PathProgramCache]: Analyzing trace with hash 945173471, now seen corresponding path program 86 times [2022-02-15 14:50:46,089 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:50:46,089 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1189393259] [2022-02-15 14:50:46,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:50:46,089 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:50:46,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:50:46,609 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:50:46,609 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:50:46,609 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1189393259] [2022-02-15 14:50:46,609 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1189393259] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:50:46,609 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1690683760] [2022-02-15 14:50:46,609 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-15 14:50:46,609 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:50:46,609 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:50:46,610 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) [2022-02-15 14:50:46,610 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (175)] Waiting until timeout for monitored process [2022-02-15 14:50:46,637 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-15 14:50:46,637 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:50:46,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2022-02-15 14:50:46,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:50:46,862 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-02-15 14:50:47,054 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-02-15 14:50:47,562 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:50:47,562 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:50:48,301 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:50:48,302 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 36 [2022-02-15 14:50:48,434 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:50:48,434 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 37 treesize of output 39 [2022-02-15 14:50:48,656 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:50:48,657 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1690683760] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:50:48,657 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:50:48,657 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21, 21] total 55 [2022-02-15 14:50:48,657 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1934293287] [2022-02-15 14:50:48,657 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:50:48,657 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2022-02-15 14:50:48,657 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:50:48,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2022-02-15 14:50:48,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=218, Invalid=2862, Unknown=0, NotChecked=0, Total=3080 [2022-02-15 14:50:48,658 INFO L87 Difference]: Start difference. First operand 7129 states and 21638 transitions. Second operand has 56 states, 56 states have (on average 2.0892857142857144) internal successors, (117), 55 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:50:51,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:50:51,184 INFO L93 Difference]: Finished difference Result 15274 states and 45750 transitions. [2022-02-15 14:50:51,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-02-15 14:50:51,184 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 2.0892857142857144) internal successors, (117), 55 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2022-02-15 14:50:51,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:50:51,209 INFO L225 Difference]: With dead ends: 15274 [2022-02-15 14:50:51,209 INFO L226 Difference]: Without dead ends: 15219 [2022-02-15 14:50:51,210 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 59 SyntacticMatches, 3 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1669 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=461, Invalid=5859, Unknown=0, NotChecked=0, Total=6320 [2022-02-15 14:50:51,210 INFO L933 BasicCegarLoop]: 115 mSDtfsCounter, 305 mSDsluCounter, 3502 mSDsCounter, 0 mSdLazyCounter, 3549 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 305 SdHoareTripleChecker+Valid, 2839 SdHoareTripleChecker+Invalid, 3623 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 3549 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-02-15 14:50:51,210 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [305 Valid, 2839 Invalid, 3623 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 3549 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-02-15 14:50:51,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15219 states. [2022-02-15 14:50:51,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15219 to 7101. [2022-02-15 14:50:51,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7101 states, 7100 states have (on average 3.037887323943662) internal successors, (21569), 7100 states have internal predecessors, (21569), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:50:51,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7101 states to 7101 states and 21569 transitions. [2022-02-15 14:50:51,357 INFO L78 Accepts]: Start accepts. Automaton has 7101 states and 21569 transitions. Word has length 48 [2022-02-15 14:50:51,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:50:51,357 INFO L470 AbstractCegarLoop]: Abstraction has 7101 states and 21569 transitions. [2022-02-15 14:50:51,357 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 2.0892857142857144) internal successors, (117), 55 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:50:51,357 INFO L276 IsEmpty]: Start isEmpty. Operand 7101 states and 21569 transitions. [2022-02-15 14:50:51,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-02-15 14:50:51,365 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:50:51,366 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:50:51,381 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (175)] Ended with exit code 0 [2022-02-15 14:50:51,573 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,SelfDestructingSolverStorable177 [2022-02-15 14:50:51,573 INFO L402 AbstractCegarLoop]: === Iteration 179 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 14:50:51,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:50:51,573 INFO L85 PathProgramCache]: Analyzing trace with hash 32030231, now seen corresponding path program 87 times [2022-02-15 14:50:51,573 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:50:51,573 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1313480816] [2022-02-15 14:50:51,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:50:51,573 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:50:51,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:50:52,126 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:50:52,126 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:50:52,127 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1313480816] [2022-02-15 14:50:52,127 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1313480816] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:50:52,127 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1172626444] [2022-02-15 14:50:52,127 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-15 14:50:52,127 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:50:52,127 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:50:52,128 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) [2022-02-15 14:50:52,128 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (176)] Waiting until timeout for monitored process [2022-02-15 14:50:52,155 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-15 14:50:52,156 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:50:52,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2022-02-15 14:50:52,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:50:52,346 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-02-15 14:50:52,589 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-02-15 14:50:53,111 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:50:53,112 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:50:53,936 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:50:53,936 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 36 [2022-02-15 14:50:54,085 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:50:54,086 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 42 [2022-02-15 14:50:54,356 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:50:54,356 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1172626444] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:50:54,356 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:50:54,356 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 23, 23] total 59 [2022-02-15 14:50:54,356 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [80157066] [2022-02-15 14:50:54,356 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:50:54,356 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2022-02-15 14:50:54,356 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:50:54,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2022-02-15 14:50:54,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=248, Invalid=3292, Unknown=0, NotChecked=0, Total=3540 [2022-02-15 14:50:54,357 INFO L87 Difference]: Start difference. First operand 7101 states and 21569 transitions. Second operand has 60 states, 60 states have (on average 1.95) internal successors, (117), 59 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:50:58,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:50:58,450 INFO L93 Difference]: Finished difference Result 16419 states and 48578 transitions. [2022-02-15 14:50:58,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-02-15 14:50:58,450 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 1.95) internal successors, (117), 59 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2022-02-15 14:50:58,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:50:58,477 INFO L225 Difference]: With dead ends: 16419 [2022-02-15 14:50:58,477 INFO L226 Difference]: Without dead ends: 16293 [2022-02-15 14:50:58,478 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 55 SyntacticMatches, 3 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2669 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=690, Invalid=9410, Unknown=0, NotChecked=0, Total=10100 [2022-02-15 14:50:58,478 INFO L933 BasicCegarLoop]: 142 mSDtfsCounter, 363 mSDsluCounter, 3776 mSDsCounter, 0 mSdLazyCounter, 4410 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 363 SdHoareTripleChecker+Valid, 2743 SdHoareTripleChecker+Invalid, 4847 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 4410 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 355 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-02-15 14:50:58,478 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [363 Valid, 2743 Invalid, 4847 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 4410 Invalid, 0 Unknown, 355 Unchecked, 1.6s Time] [2022-02-15 14:50:58,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16293 states. [2022-02-15 14:50:58,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16293 to 7081. [2022-02-15 14:50:58,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7081 states, 7080 states have (on average 3.040960451977401) internal successors, (21530), 7080 states have internal predecessors, (21530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:50:58,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7081 states to 7081 states and 21530 transitions. [2022-02-15 14:50:58,636 INFO L78 Accepts]: Start accepts. Automaton has 7081 states and 21530 transitions. Word has length 48 [2022-02-15 14:50:58,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:50:58,636 INFO L470 AbstractCegarLoop]: Abstraction has 7081 states and 21530 transitions. [2022-02-15 14:50:58,636 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 60 states have (on average 1.95) internal successors, (117), 59 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:50:58,636 INFO L276 IsEmpty]: Start isEmpty. Operand 7081 states and 21530 transitions. [2022-02-15 14:50:58,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-02-15 14:50:58,644 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:50:58,644 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:50:58,660 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (176)] Forceful destruction successful, exit code 0 [2022-02-15 14:50:58,844 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,SelfDestructingSolverStorable178 [2022-02-15 14:50:58,845 INFO L402 AbstractCegarLoop]: === Iteration 180 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 14:50:58,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:50:58,845 INFO L85 PathProgramCache]: Analyzing trace with hash -710092129, now seen corresponding path program 88 times [2022-02-15 14:50:58,845 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:50:58,845 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [598943189] [2022-02-15 14:50:58,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:50:58,845 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:50:58,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:50:59,372 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:50:59,373 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:50:59,373 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [598943189] [2022-02-15 14:50:59,373 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [598943189] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:50:59,373 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [84901244] [2022-02-15 14:50:59,373 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-15 14:50:59,373 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:50:59,373 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:50:59,374 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) [2022-02-15 14:50:59,374 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (177)] Waiting until timeout for monitored process [2022-02-15 14:50:59,400 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-15 14:50:59,400 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:50:59,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2022-02-15 14:50:59,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:50:59,591 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 11 treesize of output 7 [2022-02-15 14:50:59,775 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-02-15 14:51:00,272 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:51:00,272 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:51:00,980 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:51:00,980 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 36 [2022-02-15 14:51:01,109 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:51:01,109 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 39 [2022-02-15 14:51:01,341 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:51:01,341 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [84901244] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:51:01,341 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:51:01,341 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20, 20] total 52 [2022-02-15 14:51:01,341 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762837703] [2022-02-15 14:51:01,341 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:51:01,342 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-02-15 14:51:01,342 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:51:01,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-02-15 14:51:01,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=208, Invalid=2548, Unknown=0, NotChecked=0, Total=2756 [2022-02-15 14:51:01,342 INFO L87 Difference]: Start difference. First operand 7081 states and 21530 transitions. Second operand has 53 states, 53 states have (on average 2.169811320754717) internal successors, (115), 52 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:51:03,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:51:03,576 INFO L93 Difference]: Finished difference Result 14361 states and 43366 transitions. [2022-02-15 14:51:03,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-02-15 14:51:03,577 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 2.169811320754717) internal successors, (115), 52 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2022-02-15 14:51:03,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:51:03,601 INFO L225 Difference]: With dead ends: 14361 [2022-02-15 14:51:03,601 INFO L226 Difference]: Without dead ends: 14298 [2022-02-15 14:51:03,602 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 59 SyntacticMatches, 7 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1791 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=486, Invalid=5994, Unknown=0, NotChecked=0, Total=6480 [2022-02-15 14:51:03,602 INFO L933 BasicCegarLoop]: 117 mSDtfsCounter, 378 mSDsluCounter, 3328 mSDsCounter, 0 mSdLazyCounter, 2852 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 378 SdHoareTripleChecker+Valid, 2621 SdHoareTripleChecker+Invalid, 3213 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 2852 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 294 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-02-15 14:51:03,602 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [378 Valid, 2621 Invalid, 3213 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 2852 Invalid, 0 Unknown, 294 Unchecked, 1.0s Time] [2022-02-15 14:51:03,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14298 states. [2022-02-15 14:51:03,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14298 to 7165. [2022-02-15 14:51:03,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7165 states, 7164 states have (on average 3.032104969290899) internal successors, (21722), 7164 states have internal predecessors, (21722), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:51:03,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7165 states to 7165 states and 21722 transitions. [2022-02-15 14:51:03,740 INFO L78 Accepts]: Start accepts. Automaton has 7165 states and 21722 transitions. Word has length 48 [2022-02-15 14:51:03,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:51:03,740 INFO L470 AbstractCegarLoop]: Abstraction has 7165 states and 21722 transitions. [2022-02-15 14:51:03,740 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 2.169811320754717) internal successors, (115), 52 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:51:03,740 INFO L276 IsEmpty]: Start isEmpty. Operand 7165 states and 21722 transitions. [2022-02-15 14:51:03,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-02-15 14:51:03,749 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:51:03,749 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:51:03,766 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (177)] Forceful destruction successful, exit code 0 [2022-02-15 14:51:03,949 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 177 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable179 [2022-02-15 14:51:03,949 INFO L402 AbstractCegarLoop]: === Iteration 181 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 14:51:03,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:51:03,949 INFO L85 PathProgramCache]: Analyzing trace with hash 104863353, now seen corresponding path program 89 times [2022-02-15 14:51:03,949 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:51:03,949 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1764674722] [2022-02-15 14:51:03,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:51:03,950 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:51:03,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:51:04,485 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:51:04,485 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:51:04,485 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1764674722] [2022-02-15 14:51:04,485 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1764674722] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:51:04,485 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1239967625] [2022-02-15 14:51:04,485 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-15 14:51:04,485 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:51:04,485 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:51:04,486 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) [2022-02-15 14:51:04,487 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (178)] Waiting until timeout for monitored process [2022-02-15 14:51:04,517 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-15 14:51:04,517 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:51:04,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 42 conjunts are in the unsatisfiable core [2022-02-15 14:51:04,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:51:04,705 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-02-15 14:51:04,887 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-02-15 14:51:05,361 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:51:05,361 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:51:06,086 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:51:06,087 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 36 [2022-02-15 14:51:06,203 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:51:06,204 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 37 treesize of output 39 [2022-02-15 14:51:06,427 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:51:06,427 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1239967625] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:51:06,427 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:51:06,427 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20, 20] total 52 [2022-02-15 14:51:06,427 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1329963567] [2022-02-15 14:51:06,427 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:51:06,427 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-02-15 14:51:06,427 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:51:06,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-02-15 14:51:06,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=208, Invalid=2548, Unknown=0, NotChecked=0, Total=2756 [2022-02-15 14:51:06,428 INFO L87 Difference]: Start difference. First operand 7165 states and 21722 transitions. Second operand has 53 states, 53 states have (on average 2.188679245283019) internal successors, (116), 52 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:51:08,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:51:08,934 INFO L93 Difference]: Finished difference Result 15291 states and 45785 transitions. [2022-02-15 14:51:08,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-02-15 14:51:08,934 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 2.188679245283019) internal successors, (116), 52 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2022-02-15 14:51:08,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:51:08,960 INFO L225 Difference]: With dead ends: 15291 [2022-02-15 14:51:08,960 INFO L226 Difference]: Without dead ends: 15182 [2022-02-15 14:51:08,960 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 58 SyntacticMatches, 7 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1654 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=461, Invalid=5545, Unknown=0, NotChecked=0, Total=6006 [2022-02-15 14:51:08,960 INFO L933 BasicCegarLoop]: 111 mSDtfsCounter, 286 mSDsluCounter, 3774 mSDsCounter, 0 mSdLazyCounter, 3769 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 286 SdHoareTripleChecker+Valid, 2895 SdHoareTripleChecker+Invalid, 3834 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 3769 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-02-15 14:51:08,960 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [286 Valid, 2895 Invalid, 3834 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 3769 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-02-15 14:51:08,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15182 states. [2022-02-15 14:51:09,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15182 to 7077. [2022-02-15 14:51:09,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7077 states, 7076 states have (on average 3.0415488976823064) internal successors, (21522), 7076 states have internal predecessors, (21522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:51:09,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7077 states to 7077 states and 21522 transitions. [2022-02-15 14:51:09,165 INFO L78 Accepts]: Start accepts. Automaton has 7077 states and 21522 transitions. Word has length 48 [2022-02-15 14:51:09,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:51:09,165 INFO L470 AbstractCegarLoop]: Abstraction has 7077 states and 21522 transitions. [2022-02-15 14:51:09,165 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 2.188679245283019) internal successors, (116), 52 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:51:09,165 INFO L276 IsEmpty]: Start isEmpty. Operand 7077 states and 21522 transitions. [2022-02-15 14:51:09,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-02-15 14:51:09,173 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:51:09,173 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:51:09,190 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (178)] Forceful destruction successful, exit code 0 [2022-02-15 14:51:09,373 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable180,178 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:51:09,373 INFO L402 AbstractCegarLoop]: === Iteration 182 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 14:51:09,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:51:09,374 INFO L85 PathProgramCache]: Analyzing trace with hash -524537861, now seen corresponding path program 90 times [2022-02-15 14:51:09,374 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:51:09,374 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [849872872] [2022-02-15 14:51:09,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:51:09,374 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:51:09,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:51:09,904 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:51:09,904 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:51:09,904 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [849872872] [2022-02-15 14:51:09,904 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [849872872] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:51:09,904 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [558164529] [2022-02-15 14:51:09,905 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-15 14:51:09,905 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:51:09,905 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:51:09,905 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) [2022-02-15 14:51:09,906 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (179)] Waiting until timeout for monitored process [2022-02-15 14:51:09,932 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-15 14:51:09,932 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:51:09,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 42 conjunts are in the unsatisfiable core [2022-02-15 14:51:09,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:51:10,141 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-02-15 14:51:10,325 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-02-15 14:51:10,824 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:51:10,824 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:51:11,492 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:51:11,492 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 34 treesize of output 36 [2022-02-15 14:51:11,626 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:51:11,627 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 39 [2022-02-15 14:51:11,849 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:51:11,850 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [558164529] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:51:11,850 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:51:11,850 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20, 20] total 52 [2022-02-15 14:51:11,850 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [384424220] [2022-02-15 14:51:11,850 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:51:11,850 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-02-15 14:51:11,850 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:51:11,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-02-15 14:51:11,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=208, Invalid=2548, Unknown=0, NotChecked=0, Total=2756 [2022-02-15 14:51:11,851 INFO L87 Difference]: Start difference. First operand 7077 states and 21522 transitions. Second operand has 53 states, 53 states have (on average 2.169811320754717) internal successors, (115), 52 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:51:14,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:51:14,680 INFO L93 Difference]: Finished difference Result 15399 states and 46040 transitions. [2022-02-15 14:51:14,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-02-15 14:51:14,680 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 2.169811320754717) internal successors, (115), 52 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2022-02-15 14:51:14,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:51:14,706 INFO L225 Difference]: With dead ends: 15399 [2022-02-15 14:51:14,706 INFO L226 Difference]: Without dead ends: 15255 [2022-02-15 14:51:14,707 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 61 SyntacticMatches, 5 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1800 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=500, Invalid=6142, Unknown=0, NotChecked=0, Total=6642 [2022-02-15 14:51:14,707 INFO L933 BasicCegarLoop]: 113 mSDtfsCounter, 353 mSDsluCounter, 4448 mSDsCounter, 0 mSdLazyCounter, 4270 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 353 SdHoareTripleChecker+Valid, 3301 SdHoareTripleChecker+Invalid, 4606 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 4270 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 266 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-02-15 14:51:14,707 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [353 Valid, 3301 Invalid, 4606 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 4270 Invalid, 0 Unknown, 266 Unchecked, 1.5s Time] [2022-02-15 14:51:14,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15255 states. [2022-02-15 14:51:14,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15255 to 7155. [2022-02-15 14:51:14,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7155 states, 7154 states have (on average 3.0341067934022923) internal successors, (21706), 7154 states have internal predecessors, (21706), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:51:14,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7155 states to 7155 states and 21706 transitions. [2022-02-15 14:51:14,868 INFO L78 Accepts]: Start accepts. Automaton has 7155 states and 21706 transitions. Word has length 48 [2022-02-15 14:51:14,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:51:14,868 INFO L470 AbstractCegarLoop]: Abstraction has 7155 states and 21706 transitions. [2022-02-15 14:51:14,868 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 2.169811320754717) internal successors, (115), 52 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:51:14,868 INFO L276 IsEmpty]: Start isEmpty. Operand 7155 states and 21706 transitions. [2022-02-15 14:51:14,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-02-15 14:51:14,876 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:51:14,876 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:51:14,892 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (179)] Ended with exit code 0 Received shutdown request... [2022-02-15 14:51:15,076 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable181,179 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:51:15,077 INFO L402 AbstractCegarLoop]: === Iteration 183 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 14:51:15,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:51:15,077 INFO L85 PathProgramCache]: Analyzing trace with hash 476232873, now seen corresponding path program 91 times [2022-02-15 14:51:15,077 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:51:15,077 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [711220035] [2022-02-15 14:51:15,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:51:15,077 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:51:15,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:51:15,094 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONASSERT (3 of 4 remaining) [2022-02-15 14:51:15,094 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable182 [2022-02-15 14:51:15,095 WARN L594 AbstractCegarLoop]: Verification canceled: while BasicCegarLoop was analyzing trace of length 49 with TraceHistMax 2,while InterpolatingTraceCheckCraig was constructing Craig interpolants,while PolyPacSimplificationTermWalker was simplifying a ∧-6-1 term,while PolyPacSimplificationTermWalker was simplifying 6 xjuncts wrt. a ATOM-1 context. [2022-02-15 14:51:15,096 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATION (2 of 4 remaining) [2022-02-15 14:51:15,096 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATION (1 of 4 remaining) [2022-02-15 14:51:15,096 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr2INUSE_VIOLATION (0 of 4 remaining) [2022-02-15 14:51:15,099 INFO L732 BasicCegarLoop]: Path program histogram: [91, 89, 2, 1] [2022-02-15 14:51:15,101 INFO L230 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2022-02-15 14:51:15,101 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-02-15 14:51:15,112 INFO L202 PluginConnector]: Adding new model queue-add-3-nl.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 15.02 02:51:15 BasicIcfg [2022-02-15 14:51:15,112 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-02-15 14:51:15,112 INFO L158 Benchmark]: Toolchain (without parser) took 745395.10ms. Allocated memory was 186.6MB in the beginning and 720.4MB in the end (delta: 533.7MB). Free memory was 150.8MB in the beginning and 515.7MB in the end (delta: -364.9MB). Peak memory consumption was 169.0MB. Max. memory is 8.0GB. [2022-02-15 14:51:15,112 INFO L158 Benchmark]: Boogie PL CUP Parser took 0.13ms. Allocated memory is still 186.6MB. Free memory is still 152.0MB. There was no memory consumed. Max. memory is 8.0GB. [2022-02-15 14:51:15,112 INFO L158 Benchmark]: Boogie Procedure Inliner took 20.43ms. Allocated memory is still 186.6MB. Free memory was 150.6MB in the beginning and 149.1MB in the end (delta: 1.5MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-02-15 14:51:15,112 INFO L158 Benchmark]: Boogie Preprocessor took 12.17ms. Allocated memory is still 186.6MB. Free memory was 149.1MB in the beginning and 148.1MB in the end (delta: 1.0MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-02-15 14:51:15,112 INFO L158 Benchmark]: RCFGBuilder took 232.47ms. Allocated memory is still 186.6MB. Free memory was 148.1MB in the beginning and 137.8MB in the end (delta: 10.3MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. [2022-02-15 14:51:15,113 INFO L158 Benchmark]: TraceAbstraction took 745123.51ms. Allocated memory was 186.6MB in the beginning and 720.4MB in the end (delta: 533.7MB). Free memory was 137.3MB in the beginning and 515.7MB in the end (delta: -378.4MB). Peak memory consumption was 156.4MB. Max. memory is 8.0GB. [2022-02-15 14:51:15,113 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 [2022-02-15 14:51:15,113 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 0.13ms. Allocated memory is still 186.6MB. Free memory is still 152.0MB. There was no memory consumed. Max. memory is 8.0GB. * Boogie Procedure Inliner took 20.43ms. Allocated memory is still 186.6MB. Free memory was 150.6MB in the beginning and 149.1MB in the end (delta: 1.5MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * Boogie Preprocessor took 12.17ms. Allocated memory is still 186.6MB. Free memory was 149.1MB in the beginning and 148.1MB in the end (delta: 1.0MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 232.47ms. Allocated memory is still 186.6MB. Free memory was 148.1MB in the beginning and 137.8MB in the end (delta: 10.3MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. * TraceAbstraction took 745123.51ms. Allocated memory was 186.6MB in the beginning and 720.4MB in the end (delta: 533.7MB). Free memory was 137.3MB in the beginning and 515.7MB in the end (delta: -378.4MB). Peak memory consumption was 156.4MB. 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: 96]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while BasicCegarLoop was analyzing trace of length 49 with TraceHistMax 2,while InterpolatingTraceCheckCraig was constructing Craig interpolants,while PolyPacSimplificationTermWalker was simplifying a ∧-6-1 term,while PolyPacSimplificationTermWalker was simplifying 6 xjuncts wrt. a ATOM-1 context. - TimeoutResultAtElement [Line: 89]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was analyzing trace of length 49 with TraceHistMax 2,while InterpolatingTraceCheckCraig was constructing Craig interpolants,while PolyPacSimplificationTermWalker was simplifying a ∧-6-1 term,while PolyPacSimplificationTermWalker was simplifying 6 xjuncts wrt. a ATOM-1 context. - TimeoutResultAtElement [Line: 89]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was analyzing trace of length 49 with TraceHistMax 2,while InterpolatingTraceCheckCraig was constructing Craig interpolants,while PolyPacSimplificationTermWalker was simplifying a ∧-6-1 term,while PolyPacSimplificationTermWalker was simplifying 6 xjuncts wrt. a ATOM-1 context. - TimeoutResultAtElement [Line: 90]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was analyzing trace of length 49 with TraceHistMax 2,while InterpolatingTraceCheckCraig was constructing Craig interpolants,while PolyPacSimplificationTermWalker was simplifying a ∧-6-1 term,while PolyPacSimplificationTermWalker was simplifying 6 xjuncts wrt. a ATOM-1 context. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 7 procedures, 71 locations, 4 error locations. Started 1 CEGAR loops. OverallTime: 745.0s, OverallIterations: 183, TraceHistogramMax: 2, PathProgramHistogramMax: 91, EmptinessCheckTime: 1.0s, AutomataDifference: 367.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.1s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 67963 SdHoareTripleChecker+Valid, 168.2s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 67963 mSDsluCounter, 354159 SdHoareTripleChecker+Invalid, 142.2s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 9143 IncrementalHoareTripleChecker+Unchecked, 476086 mSDsCounter, 11760 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 453394 IncrementalHoareTripleChecker+Invalid, 474297 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 11760 mSolverCounterUnsat, 20398 mSDtfsCounter, 453394 mSolverCounterSat, 1.4s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 21293 GetRequests, 9135 SyntacticMatches, 1227 SemanticMatches, 10931 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 233205 ImplicationChecksByTransitivity, 328.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=7334occurred in iteration=132, InterpolantAutomatonStates: 6773, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 16.1s AutomataMinimizationTime, 182 MinimizatonAttempts, 768636 StatesRemovedByMinimization, 178 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.7s SsaConstructionTime, 2.0s SatisfiabilityAnalysisTime, 317.7s InterpolantComputationTime, 14549 NumberOfCodeBlocks, 14549 NumberOfCodeBlocksAsserted, 549 NumberOfCheckSat, 21192 ConstructedInterpolants, 234 QuantifiedInterpolants, 504104 SizeOfPredicates, 2650 NumberOfNonLiveVariables, 18269 ConjunctsInSsa, 5936 ConjunctsInUnsatCore, 537 InterpolantComputations, 5 PerfectInterpolantSequences, 91/4825 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